108-479: The Integrated Guided Missile Development Programme ( IGMDP ) was an Indian Ministry of Defence programme for the research and development of the comprehensive range of missiles . The programme was managed by the Defence Research and Development Organisation (DRDO) and Ordnance Factories Board in partnership with other Indian government political organisations. The project started in 1982–83 under
216-513: A misnomer , as their energy comes from the nucleus of the atom, just as it does with fusion weapons. In fission weapons, a mass of fissile material ( enriched uranium or plutonium ) is forced into supercriticality —allowing an exponential growth of nuclear chain reactions —either by shooting one piece of sub-critical material into another (the "gun" method) or by compression of a sub-critical sphere or cylinder of fissile material using chemically fueled explosive lenses . The latter approach,
324-665: A policy of deliberate ambiguity , it does not acknowledge having them. Germany , Italy , Turkey , Belgium , the Netherlands , and Belarus are nuclear weapons sharing states. South Africa is the only country to have independently developed and then renounced and dismantled its nuclear weapons. The Treaty on the Non-Proliferation of Nuclear Weapons aims to reduce the spread of nuclear weapons, but there are different views of its effectiveness. There are two basic types of nuclear weapons: those that derive
432-745: A branch of the Public Department and maintained a list of Army personnel. With the Charter Act 1833 , the Secretariat of the Government of the East India Company was reorganised into four departments, each headed by a secretary to the Government. The armies in the presidencies of Bengal , Bombay and Madras functioned as the respective presidency armies until April 1895, when the presidency armies were unified into
540-650: A completely fiberglass structure and weighs around 42 kg. Nag was test fired for the 45th time on 19 March 2005 from the Test Range at Ahmednagar ( Maharashtra ), signalling the completion of the developmental phase. It will now enter the production phase, subject to user trials and acceptance by the Indian Army . Further versions of the missile may make use of an all-weather Milli-metre Wave (mmW) seeker as an additional option. This seeker has reportedly been developed and efforts are on to integrate it into
648-696: A conference—called for in the manifesto—in Pugwash, Nova Scotia , Eaton's birthplace. This conference was to be the first of the Pugwash Conferences on Science and World Affairs , held in July 1957. By the 1960s, steps were taken to limit both the proliferation of nuclear weapons to other countries and the environmental effects of nuclear testing . The Partial Nuclear Test Ban Treaty (1963) restricted all nuclear testing to underground nuclear testing , to prevent contamination from nuclear fallout, whereas
756-458: A faster and less vulnerable attack, the development of long-range intercontinental ballistic missiles (ICBMs) and submarine-launched ballistic missiles (SLBMs) has given some nations the ability to plausibly deliver missiles anywhere on the globe with a high likelihood of success. More advanced systems, such as multiple independently targetable reentry vehicles (MIRVs), can launch multiple warheads at different targets from one missile, reducing
864-614: A few nations possess such weapons or are suspected of seeking them. The only countries known to have detonated nuclear weapons—and acknowledge possessing them—are (chronologically by date of first test) the United States , the Soviet Union (succeeded as a nuclear power by Russia ), the United Kingdom , France , China , India , Pakistan , and North Korea . Israel is believed to possess nuclear weapons, though, in
972-555: A fission bomb to initiate them. Such a device might provide a simpler path to thermonuclear weapons than one that required the development of fission weapons first, and pure fusion weapons would create significantly less nuclear fallout than other thermonuclear weapons because they would not disperse fission products. In 1998, the United States Department of Energy divulged that the United States had, "...made
1080-421: A fusion weapon as of January 2016 , though this claim is disputed. Thermonuclear weapons are considered much more difficult to successfully design and execute than primitive fission weapons. Almost all of the nuclear weapons deployed today use the thermonuclear design because it results in an explosion hundreds of times stronger than that of a fission bomb of similar weight. Thermonuclear bombs work by using
1188-490: A longer-range of 350 km, and was successfully test fired in 2004. A technology demonstrator for re-entry technology called Agni was added to IGMDP as Prithvi was unable to be converted to a longer ranged missile. The first flight of Agni with re-entry technology took place in 1989. The re-entry system used resins and carbon fibres in its construction and was able to withstand a temperature of up to 3000 °C. The technologies developed in this project were eventually used in
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#17327904201421296-472: A nation's economic electronics-based infrastructure. Because the effect is most effectively produced by high altitude nuclear detonations (by military weapons delivered by air, though ground bursts also produce EMP effects over a localized area), it can produce damage to electronics over a wide, even continental, geographical area. Research has been done into the possibility of pure fusion bombs : nuclear weapons that consist of fusion reactions without requiring
1404-537: A new nuclear strategy, one that is distinct from that which gave relative stability during the Cold War. Since 1996, the United States has had a policy of allowing the targeting of its nuclear weapons at terrorists armed with weapons of mass destruction . Robert Gallucci argues that although traditional deterrence is not an effective approach toward terrorist groups bent on causing a nuclear catastrophe, Gallucci believes that "the United States should instead consider
1512-425: A nuclear war between two nations would result in mutual annihilation. From this point of view, the significance of nuclear weapons is to deter war because any nuclear war would escalate out of mutual distrust and fear, resulting in mutually assured destruction . This threat of national, if not global, destruction has been a strong motivation for anti-nuclear weapons activism. Critics from the peace movement and within
1620-411: A nuclear weapon from another country by threatening nuclear retaliation is known as the strategy of nuclear deterrence . The goal in deterrence is to always maintain a second strike capability (the ability of a country to respond to a nuclear attack with one of its own) and potentially to strive for first strike status (the ability to destroy an enemy's nuclear forces before they could retaliate). During
1728-465: A nuclear weapon is a gravity bomb dropped from aircraft ; this was the method used by the United States against Japan in 1945. This method places few restrictions on the size of the weapon. It does, however, limit attack range, response time to an impending attack, and the number of weapons that a country can field at the same time. With miniaturization, nuclear bombs can be delivered by both strategic bombers and tactical fighter-bombers . This method
1836-409: A nuclear weapon to its target is an important factor affecting both nuclear weapon design and nuclear strategy . The design, development, and maintenance of delivery systems are among the most expensive parts of a nuclear weapons program; they account, for example, for 57% of the financial resources spent by the United States on nuclear weapons projects since 1940. The simplest method for delivering
1944-433: A nuclear weapon with suitable materials (such as cobalt or gold ) creates a weapon known as a salted bomb . This device can produce exceptionally large quantities of long-lived radioactive contamination . It has been conjectured that such a device could serve as a "doomsday weapon" because such a large quantity of radioactivities with half-lives of decades, lifted into the stratosphere where winds would distribute it around
2052-421: A policy of expanded deterrence, which focuses not solely on the would-be nuclear terrorists but on those states that may deliberately transfer or inadvertently leak nuclear weapons and materials to them. By threatening retaliation against those states, the United States may be able to deter that which it cannot physically prevent.". Graham Allison makes a similar case, arguing that the key to expanded deterrence
2160-487: A short-range surface-to-air missile on land. According to reports, the range of the missile is 12 km and is fitted with a 15 kg warhead. The weight of the missile is 130 kg. The length of the missile is 3.5 m. India officially shut down the project on 27 February 2008. In 2003, Defence Minister George Fernandes had indicated that the Trishul missile had been de-linked from user service and would be continued as
2268-447: A significant portion of their energy from fission reactions used to "trigger" fusion reactions, and fusion reactions can themselves trigger additional fission reactions. Only six countries—the United States , Russia , the United Kingdom , China , France , and India —have conducted thermonuclear weapon tests. Whether India has detonated a "true" multi-staged thermonuclear weapon is controversial. North Korea claims to have tested
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#17327904201422376-756: A single Indian Army. For administrative convenience, it was divided into four commands: Punjab (including the North West Frontier ), Bengal (including Burma ), Madras and Bombay (including Sindh , Quetta and Aden ). The supreme authority over the Indian Army was vested in the Governor General-in-Council , subject to the control of the Crown , which was exercised by the Secretary of State for India . Two members of
2484-550: A substantial investment" in the past to develop pure fusion weapons, but that, "The U.S. does not have and is not developing a pure fusion weapon", and that, "No credible design for a pure fusion weapon resulted from the DOE investment". Nuclear isomers provide a possible pathway to fissionless fusion bombs. These are naturally occurring isotopes ( Hf being a prominent example) which exist in an elevated energy state. Mechanisms to release this energy as bursts of gamma radiation (as in
2592-780: A tactical nuclear weapon . The initial project framework of the IGMDP envisioned the Prithvi missile as a short-range ballistic missile with variants for the Indian Army, Indian Air Force and the Indian Navy. Over the years the Prithvi missile specifications have undergone a number of changes. The Prithvi I class of missiles were inducted into the Indian Army in 1994, and it is reported that Prithvi I missiles are being withdrawn from service, being replaced with Prahar missiles. Prithvi II missiles were inducted in 1996. Prithvi III class has
2700-471: A technology demonstrator. Akash (Sanskrit: आकाश meaning Sky ) is a medium-range surface-to-air missile developed as part of India's Integrated Guided Missile Development Programme to achieve self-sufficiency in the area of surface-to-air missiles. It is the most expensive missile project ever undertaken by the Union government in the 20th century. Development costs skyrocketed to almost US$ 120 million, which
2808-697: Is '"the principal arm and Secretariat to the Chiefs of Staff Committee". The Chiefs of Staff Committee is composed of: (a) Chief of the Army Staff (COAS) ; (b) Chief of the Naval Staff (CNS) ; (c) Chief of the Air Staff (CAS) ; and (d) Chief of Defence Staff (CDS) (non-voting member). The Scientific Adviser to the Minister of Defence is invited to attend whenever needed. The senior-most member of
2916-698: Is a 4-star General (or his equivalent in the Air Force or the Navy). The first Chief of Defence Staff was General Bipin Rawat , who took over on 1 January 2020. "Chiefs of Staff are the authority for advising the Defence Minister and normally through him the Cabinet Committee on Political Affairs on all military matters which require ministerial consideration". The Integrated Defence Staff
3024-408: Is a family of tactical surface-to-surface short-range ballistic missiles (SRBM) and is India's first indigenously developed ballistic missile. Development of the Prithvi began in 1983, and it was first test-fired on 25 February 1988 from Sriharikota, SHAR Centre, Pottisreeramulu Nellore district, Andhra Pradesh. It has a range of up to 150 to 300 km. The land variant is called Prithvi while
3132-461: Is a modified BMP-2 infantry fighting vehicle licence produced as "Sarath" in India. The carriers are capable of carrying four ready-to-fire missiles in the observation/launch platform which can be elevated with more missiles available for reload within the carrier. For the Air Force, a nose-mounted thermal imaging system has been developed for guiding the missile's trajectory "Helina". The missile has
3240-420: Is a thermonuclear weapon that yields a relatively small explosion but a relatively large amount of neutron radiation . Such a weapon could, according to tacticians, be used to cause massive biological casualties while leaving inanimate infrastructure mostly intact and creating minimal fallout. Because high energy neutrons are capable of penetrating dense matter, such as tank armor, neutron warheads were procured in
3348-721: Is an explosive device that derives its destructive force from nuclear reactions , either fission (fission bomb) or a combination of fission and fusion reactions ( thermonuclear bomb ), producing a nuclear explosion . Both bomb types release large quantities of energy from relatively small amounts of matter . The first test of a fission ("atomic") bomb released an amount of energy approximately equal to 20,000 tons of TNT (84 TJ ). The first thermonuclear ("hydrogen") bomb test released energy approximately equal to 10 million tons of TNT (42 PJ). Nuclear bombs have had yields between 10 tons TNT (the W54 ) and 50 megatons for
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3456-663: Is an officer from the Indian Administrative Service , apart from the Defence Secretary, there are three other secretary -level posts in the Ministry of Defence. Scientific Adviser to the Defence Minister plays a key role in the formulation of research and development policies and in promoting self-reliance in Indian defence industries. In 1955, the title of Commander-in-Chief was abolished and
3564-456: Is analogous to identifying a criminal by fingerprints. "The goal would be twofold: first, to deter leaders of nuclear states from selling weapons to terrorists by holding them accountable for any use of their weapons; second, to give leaders every incentive to tightly secure their nuclear weapons and materials." According to the Pentagon's June 2019 " Doctrine for Joint Nuclear Operations " of
3672-403: Is coming up with ways of tracing nuclear material to the country that forged the fissile material. "After a nuclear bomb detonates, nuclear forensics cops would collect debris samples and send them to a laboratory for radiological analysis. By identifying unique attributes of the fissile material, including its impurities and contaminants, one could trace the path back to its origin." The process
3780-406: Is far more than other similar systems. Akash is a medium-range surface-to-air missile with an intercept range of 30 km. It has a launch weight of 720 kg, a diameter of 35 cm and a length of 5.8 metres. Akash flies at supersonic speed, reaching around Mach 2.5. It can reach an altitude of 18 km. A digital proximity fuse is coupled with a 55 kg pre-fragmented warhead, while
3888-481: Is for the purpose of achieving different yields for different situations , and in manipulating design elements to attempt to minimize weapon size, radiation hardness or requirements for special materials, especially fissile fuel or tritium. Some nuclear weapons are designed for special purposes; most of these are for non-strategic (decisively war-winning) purposes and are referred to as tactical nuclear weapons . The neutron bomb purportedly conceived by Sam Cohen
3996-503: Is no evidence that it is feasible beyond the military domain. However, the U.S. Air Force funded studies of the physics of antimatter in the Cold War , and began considering its possible use in weapons, not just as a trigger, but as the explosive itself. A fourth generation nuclear weapon design is related to, and relies upon, the same principle as antimatter-catalyzed nuclear pulse propulsion . Most variation in nuclear weapon design
4104-409: Is not a fusion bomb. In the boosted bomb, the neutrons produced by the fusion reactions serve primarily to increase the efficiency of the fission bomb. There are two types of boosted fission bomb: internally boosted, in which a deuterium-tritium mixture is injected into the bomb core, and externally boosted, in which concentric shells of lithium-deuteride and depleted uranium are layered on the outside of
4212-490: Is not clear that this has ever been implemented, and their plausible use in nuclear weapons is a matter of dispute. The other basic type of nuclear weapon produces a large proportion of its energy in nuclear fusion reactions. Such fusion weapons are generally referred to as thermonuclear weapons or more colloquially as hydrogen bombs (abbreviated as H-bombs ), as they rely on fusion reactions between isotopes of hydrogen ( deuterium and tritium ). All such weapons derive
4320-480: Is the largest employer in the world with 29.2 lakh (2.92 million) employees. At present, the new creation of National Defence University , for the training of military officials and concerned civilian officials, will be administered and overseen by the Ministry. The Ministry organises and runs Republic Day celebrations and parade every year in January at Rajpath , hosting a chief guest . The Ministry has
4428-455: Is the senior most civil servant in the ministry and is responsible for coordinating the activities of the four departments in the ministry. His/her role is to ensure that the MoD operates effectively as a department of the government. Defence Secretary is assisted by additional secretaries and joint secretaries to Government of India posted in the ministry. The Defence Secretary , generally,
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4536-454: Is the primary means of nuclear weapons delivery; the majority of U.S. nuclear warheads, for example, are free-fall gravity bombs, namely the B61 , which is being improved upon to this day. Preferable from a strategic point of view is a nuclear weapon mounted on a missile , which can use a ballistic trajectory to deliver the warhead over the horizon. Although even short-range missiles allow for
4644-612: The Agni series of missiles. Trishul ( Sanskrit : त्रिशूल, meaning trident ) is the name of a short range surface-to-air missile developed by India as a part of the Integrated Guided Missile Development Program. It has a range of 12 km and is fitted with a 5.5 kg warhead . Designed to be used against low-level (sea skimming) targets at short range, the system has been developed to defend naval vessels against missiles and also as
4752-606: The DRDL had developed competence and expertise in the fields of propulsion, navigation and manufacture of aerospace materials based on the Soviet rocketry technologies . Thus, India's political leadership, which included Prime Minister Indira Gandhi , Defence Minister R. Venkataraman , V.S. Arunachalam (Scientific Advisor to the Defence Minister), decided that all these technologies should be consolidated. This led to
4860-735: The Missile Technology Control Regime (then an informal grouping established in 1987 by Canada, France, Germany, Italy, Japan, the United Kingdom and the United States) decided to restrict access to any technology that would help India in its missile development program. To counter the MTCR , the IGMDP team formed a consortium of DRDO laboratories, industries and academic institutions to build these sub-systems, components and materials. Though this slowed down
4968-533: The National Security Council , Ministry of External Affairs and the Ministry of Home Affairs . The functions of MoD which in 1947 was mainly logistic support to the armed forces, have undergone far-reaching changes. In November 1962, following the 1962 war, a Department of Defence Production was set up to deal with research, development and production of defence equipment. In November 1965,
5076-695: The Starfish Prime high-altitude nuclear test in 1962, an unexpected effect was produced which is called a nuclear electromagnetic pulse . This is an intense flash of electromagnetic energy produced by a rain of high-energy electrons which in turn are produced by a nuclear bomb's gamma rays. This flash of energy can permanently destroy or disrupt electronic equipment if insufficiently shielded. It has been proposed to use this effect to disable an enemy's military and civilian infrastructure as an adjunct to other nuclear or conventional military operations. By itself it could as well be useful to terrorists for crippling
5184-554: The Tsar Bomba (see TNT equivalent ). A thermonuclear weapon weighing as little as 600 pounds (270 kg) can release energy equal to more than 1.2 megatonnes of TNT (5.0 PJ). A nuclear device no larger than a conventional bomb can devastate an entire city by blast, fire, and radiation . Since they are weapons of mass destruction , the proliferation of nuclear weapons is a focus of international relations policy. Nuclear weapons have been deployed twice in war , both by
5292-676: The Tsar Bomba of the USSR, which released an energy equivalent of over 50 megatons of TNT (210 PJ), was a three-stage weapon. Most thermonuclear weapons are considerably smaller than this, due to practical constraints from missile warhead space and weight requirements. In the early 1950s the Livermore Laboratory in the United States had plans for the testing of two massive bombs, Gnomon and Sundial , 1 gigaton of TNT and 10 gigatons of TNT respectively. Fusion reactions do not create fission products, and thus contribute far less to
5400-424: The hafnium controversy ) have been proposed as possible triggers for conventional thermonuclear reactions. Antimatter , which consists of particles resembling ordinary matter particles in most of their properties but having opposite electric charge , has been considered as a trigger mechanism for nuclear weapons. A major obstacle is the difficulty of producing antimatter in large enough quantities, and there
5508-614: The head of government or head of state . Despite controls and regulations governing nuclear weapons, there is an inherent danger of "accidents, mistakes, false alarms, blackmail, theft, and sabotage". In the late 1940s, lack of mutual trust prevented the United States and the Soviet Union from making progress on arms control agreements. The Russell–Einstein Manifesto was issued in London on July 9, 1955, by Bertrand Russell in
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#17327904201425616-436: The tropopause into the stratosphere , where the calm non-turbulent winds permit the debris to travel great distances from the burst, eventually settling and unpredictably contaminating areas far removed from the target of the explosion. There are other types of nuclear weapons as well. For example, a boosted fission weapon is a fission bomb that increases its explosive yield through a small number of fusion reactions, but it
5724-537: The "implosion" method, is more sophisticated and more efficient (smaller, less massive, and requiring less of the expensive fissile fuel) than the former. A major challenge in all nuclear weapon designs is to ensure that a significant fraction of the fuel is consumed before the weapon destroys itself. The amount of energy released by fission bombs can range from the equivalent of just under a ton to upwards of 500,000 tons (500 kilotons ) of TNT (4.2 to 2.1 × 10 GJ). All fission reactions generate fission products ,
5832-586: The 1980s (though not deployed in Europe) for use as tactical payloads for US Army artillery shells (200 mm W79 and 155 mm W82 ) and short range missile forces. Soviet authorities announced similar intentions for neutron warhead deployment in Europe; indeed, they claimed to have originally invented the neutron bomb, but their deployment on USSR tactical nuclear forces is unverifiable. A type of nuclear explosive most suitable for use by ground special forces
5940-563: The Armed Forces to discharge their responsibilities in the context of the defence of the country. The Raksha Mantri (Defence Minister) is the head of the Ministry of Defence." The Defence Ministry is responsible for "obtaining policy directions of the Government on all defence and security related matters" and communicating these directions to "Services Headquarters, Inter-Services Organisations, Production Establishments and Research and Development Organisations". The MoD works closely with
6048-720: The Armed forces, the Government has set up the Integrated Defence Staff, headed by the Chief of Integrated Defence Staff as the chairman. It was created on 1 October 2001 based on the recommendations of the Group of Ministers which was set up in 2000 (post-Kargil) to review India's defence management. It acts as the point organisation for integration of policy, doctrine, war-fighting and procurement by employing best management practices. The chairman of Integrated Defences Staff
6156-593: The COSC is appointed its chairperson . General Bipin Rawat was the last head of COSC. The position of COSC has ceased to exist with the creation of Chief of Defence Staff . General Bipin Rawat was appointed the first Chief of Defence Staff in 2019. He died in a helicopter crash on 8 December 2021. MoD is headed by the Defence Minister of India , who is supported by one, or more than one, minister of state. There are about 400,000 defence civilians, under
6264-425: The Cold War, policy and military theorists considered the sorts of policies that might prevent a nuclear attack, and they developed game theory models that could lead to stable deterrence conditions. Different forms of nuclear weapons delivery (see above) allow for different types of nuclear strategies. The goals of any strategy are generally to make it difficult for an enemy to launch a pre-emptive strike against
6372-489: The Department of Defence Production (DDP), the Department of Defence Research and Development (DRDO), and the Department of Ex-Servicemen Welfare (DESW). The Defence Secretary of India functions as head of the Department of Defence, and is additionally responsible for coordinating the activities of the departments in the ministry. The principal functions of all the departments are as follows: The Finance Division of
6480-400: The Department of Defence Production. A Scientific Adviser to the Defence Minister was appointed to advise on scientific aspects of military equipment and the research and design of defence forces equipment. The Department of Ex-Servicemen Welfare was created in 2004. The Ministry of Defence consists of five departments; the Department of Defence (DoD), the Department of Military Affairs (DMA),
6588-399: The Department of Defence Supplies was created for planning and execution of schemes for import substitution of requirements for defence purposes. These two Departments were later merged to form the Department of Defence Production and Supplies. In 1980, the Department of Defence Research and Development was created. In January 2004, the Department of Defence Production and Supplies was renamed
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#17327904201426696-647: The IGMDP: The Agni missile was initially conceived in the IGMDP as a technology demonstrator project in the form of a re-entry vehicle, and was later upgraded to a ballistic missile with different ranges. As part of this program, the Interim Test Range at Balasore in Odisha was also developed for missile testing. After India test-fired the first Prithvi missile in 1988, and the Agni missile in 1989,
6804-606: The IIR seeker is LOBL (lock-on before launch). Nag can be mounted on an infantry vehicle; a helicopter launched version will also be available with integration work being carried out with the HAL Dhruv . Separate versions for the Army and the Air Force are being developed. For the Army, the missiles will be carried by specialist carrier vehicles (NAMICA-Nag Missile Carrier) equipped with a thermographic camera for target acquisition. NAMICA
6912-751: The Indian Air Force ordered six more squadrons of the Akash system, taking orders to eight of the type. The Indian Army is also expected to order the Akash system. Nag ( Sanskrit : नाग meaning cobra ) is India's third generation " Fire-and-forget " anti-tank missile . It is an all weather, top attack missile with a range of 0.5 to 4 km. The missile uses an 8 kg high-explosive anti-tank (HEAT) tandem warhead capable of defeating modern armour including Explosive Reactive Armour (ERA) and composite armour . Nag uses Imaging Infra-Red (IIR) guidance with day and night capability. Mode of launch for
7020-494: The Joint Chiefs of Staffs website Publication, "Integration of nuclear weapons employment with conventional and special operations forces is essential to the success of any mission or operation." Because they are weapons of mass destruction, the proliferation and possible use of nuclear weapons are important issues in international relations and diplomacy. In most countries, the use of nuclear force can only be authorized by
7128-461: The MOD including Ministry of Finance personnel attached to MOD. In 2015–16 Defence pension bill was ₹ 54,500 crore (equivalent to ₹ 780 billion or US$ 9.4 billion in 2023) of which about 36 per cent was on account of defence civilians. The ministers are supported by several civilian, scientific and military advisers. The Defence Secretary as head of the Department of Defence,
7236-621: The Ministry of Defence is headed by the Financial Adviser (Defence Services). The financial advisor exercises financial control over proposals involving expenditure from the Defence Budget and is responsible for the internal audit and accounting of defence expenditure. In the latter tasks, the financial advisor is assisted by the Controller General of Defence Accounts . To ensure a high degree of synergy between
7344-503: The Nuclear Age (1961) that mere possession of a nuclear arsenal was enough to ensure deterrence, and thus concluded that the spread of nuclear weapons could increase international stability . Some prominent neo-realist scholars, such as Kenneth Waltz and John Mearsheimer , have argued, along the lines of Gallois, that some forms of nuclear proliferation would decrease the likelihood of total war , especially in troubled regions of
7452-486: The Patriot missiles. The missile is supported by a multi-target and multi-function phased array fire control radar called the ' Rajendra ' with a range of about 80 km in search, and 60 km in terms of engagement. The missile is completely guided by the radar, without any active guidance of its own. This allows it greater capability against jamming as the aircraft self-protection jammer would have to work against
7560-664: The USAAF detonated a plutonium implosion-type fission bomb nicknamed " Fat Man " over the Japanese city of Nagasaki . These bombings caused injuries that resulted in the deaths of approximately 200,000 civilians and military personnel . The ethics of these bombings and their role in Japan's surrender are to this day, still subjects of debate . Since the atomic bombings of Hiroshima and Nagasaki , nuclear weapons have been detonated over 2,000 times for testing and demonstration. Only
7668-777: The USAF AIR-2 Genie , the AIM-26 Falcon and US Army Nike Hercules . Missile interceptors such as the Sprint and the Spartan also used small nuclear warheads (optimized to produce neutron or X-ray flux) but were for use against enemy strategic warheads. Other small, or tactical, nuclear weapons were deployed by naval forces for use primarily as antisubmarine weapons. These included nuclear depth bombs or nuclear armed torpedoes. Nuclear mines for use on land or at sea are also possibilities. The system used to deliver
7776-527: The United States against the Japanese cities of Hiroshima and Nagasaki in 1945 during World War II . Nuclear weapons have only twice been used in warfare, both times by the United States against Japan at the end of World War II . On August 6, 1945, the United States Army Air Forces (USAAF) detonated a uranium gun-type fission bomb nicknamed " Little Boy " over the Japanese city of Hiroshima ; three days later, on August 9,
7884-526: The United States. Small, two-man portable tactical weapons (somewhat misleadingly referred to as suitcase bombs ), such as the Special Atomic Demolition Munition , have been developed, although the difficulty of combining sufficient yield with portability limits their military utility. Nuclear warfare strategy is a set of policies that deal with preventing or fighting a nuclear war. The policy of trying to prevent an attack by
7992-708: The birth of the Integrated Guided Missile Development Programme with Dr. Abdul Kalam , who had previously been the project director for the SLV-3 programme at ISRO , was inducted as the DRDL Director in 1983 to conceive and lead it. While the scientists proposed the development of each missile consecutively, the Defence Minister R. Venkataraman asked them to reconsider and develop all the missiles simultaneously. Thus, four projects, to be pursued concurrently, were born under
8100-485: The chance of a successful missile defense . Today, missiles are most common among systems designed for delivery of nuclear weapons. Making a warhead small enough to fit onto a missile, though, can be difficult. Tactical weapons have involved the most variety of delivery types, including not only gravity bombs and missiles but also artillery shells, land mines , and nuclear depth charges and torpedoes for anti-submarine warfare . An atomic mortar has been tested by
8208-670: The council were responsible for military affairs. One was the Military Member, who supervised all administrative and financial matters. The other was the commander-in-chief who was responsible for all operational matters. The Military Department was abolished in March 1906 and replaced by two separate departments; the Army and the Military Supply departments. In April 1909 the Military Supply Department
8316-416: The country. The Ministry of Defence provides policy framework and resources to the armed forces to discharge their responsibility in the context of the country's defence. The Indian Armed Forces (including Indian Army , Indian Air Force , Indian Navy ) and Indian Coast Guard under the Ministry of Defence are primarily responsible for ensuring the territorial integrity of India . As per Statista , MoD
8424-435: The creation of nuclear fallout than fission reactions, but because all thermonuclear weapons contain at least one fission stage, and many high-yield thermonuclear devices have a final fission stage, thermonuclear weapons can generate at least as much nuclear fallout as fission-only weapons. Furthermore, high yield thermonuclear explosions (most dangerously ground bursts) have the force to lift radioactive debris upwards past
8532-455: The decision process. The prospect of mutually assured destruction might not deter an enemy who expects to die in the confrontation. Further, if the initial act is from a stateless terrorist instead of a sovereign nation, there might not be a nation or specific target to retaliate against. It has been argued, especially after the September 11, 2001, attacks , that this complication calls for
8640-469: The energy of a fission bomb to compress and heat fusion fuel. In the Teller-Ulam design , which accounts for all multi-megaton yield hydrogen bombs, this is accomplished by placing a fission bomb and fusion fuel ( tritium , deuterium , or lithium deuteride ) in proximity within a special, radiation-reflecting container. When the fission bomb is detonated, gamma rays and X-rays emitted first compress
8748-455: The fission bomb core. The external method of boosting enabled the USSR to field the first partially thermonuclear weapons, but it is now obsolete because it demands a spherical bomb geometry, which was adequate during the 1950s arms race when bomber aircraft were the only available delivery vehicles. The detonation of any nuclear weapon is accompanied by a blast of neutron radiation . Surrounding
8856-420: The fusion fuel, then heat it to thermonuclear temperatures. The ensuing fusion reaction creates enormous numbers of high-speed neutrons , which can then induce fission in materials not normally prone to it, such as depleted uranium . Each of these components is known as a "stage", with the fission bomb as the "primary" and the fusion capsule as the "secondary". In large, megaton-range hydrogen bombs, about half of
8964-535: The globe, would make all life on the planet extinct. In connection with the Strategic Defense Initiative , research into the nuclear pumped laser was conducted under the DOD program Project Excalibur but this did not result in a working weapon. The concept involves the tapping of the energy of an exploding nuclear bomb to power a single-shot laser that is directed at a distant target. During
9072-459: The high-power Rajendra, and the aircraft being attacked is not alerted by any terminal seeker on the Akash itself. Design of the missile is similar to that of the SA-6 , with four long tube ramjet inlet ducts mounted mid-body between wings. For pitch/yaw control four clipped triangular moving wings are mounted on mid-body. For roll control four inline clipped delta fins with ailerons are mounted before
9180-626: The largest budget among the federal departments of India and currently stands third in military expenditure in the world , among countries of the world. A Military Department was created in the Supreme Government of the English East India Company at Kolkata in the year 1776, having the main function to sift and record orders relating to the Army issued by various Departments of the Government of East India Company. The Military Department initially functioned as
9288-505: The leadership of Abdul Kalam who oversaw its ending in 2008 after these strategic missiles were successfully developed. On 8 January 2008, the DRDO formally announced the successful rated guided missile programme was completed with its design objectives achieved since most of the missiles in the programme had been developed and inducted by the Indian armed forces . By the start of the 1980s,
9396-496: The majority of their energy from nuclear fission reactions alone, and those that use fission reactions to begin nuclear fusion reactions that produce a large amount of the total energy output. All existing nuclear weapons derive some of their explosive energy from nuclear fission reactions. Weapons whose explosive output is exclusively from fission reactions are commonly referred to as atomic bombs or atom bombs (abbreviated as A-bombs ). This has long been noted as something of
9504-407: The midst of the Cold War. It highlighted the dangers posed by nuclear weapons and called for world leaders to seek peaceful resolutions to international conflict. The signatories included eleven pre-eminent intellectuals and scientists, including Albert Einstein , who signed it just days before his death on April 18, 1955. A few days after the release, philanthropist Cyrus S. Eaton offered to sponsor
9612-545: The military establishment have questioned the usefulness of such weapons in the current military climate. According to an advisory opinion issued by the International Court of Justice in 1996, the use of (or threat of use of) such weapons would generally be contrary to the rules of international law applicable in armed conflict, but the court did not reach an opinion as to whether or not the threat or use would be lawful in specific extreme circumstances such as if
9720-543: The missile launcher, while the Radar is on a BMP-2 chassis and is called the Battery Level Radar-II. In either case, the launchers carry three ready-to-fire Akash missiles each. The launchers are automated, autonomous and networked to a command post and the guidance radar. They are slewable in azimuth and elevation. The Akash system can be deployed by rail, road or air. The first test flight of Akash missile
9828-486: The missile. Ministry of Defence (India) 700,000 (reserve personnel) (2023) The Ministry of Defence ( MoD ) ( romanized : Raksha Mantralay ) is charged with coordinating and supervising all agencies and functions of the government relating directly to national security and the Indian Armed Forces . The President of India is the ceremonial commander-in-chief of the armed forces of
9936-408: The missiles before they land or implementing civil defense measures using early-warning systems to evacuate citizens to safe areas before an attack. Weapons designed to threaten large populations or to deter attacks are known as strategic weapons . Nuclear weapons for use on a battlefield in military situations are called tactical weapons . Critics of nuclear war strategy often suggest that
10044-481: The naval operational variant of Prithvi I and Prithvi III class missiles are code named Dhanush (meaning "Bow"). Both variants are used for surface targets. The Prithvi is said to have its propulsion technology derived from the Soviet SA-2 surface-to-air missile. Variants make use of either liquid or both liquid and solid fuels. Developed as a battlefield missile, it could carry a nuclear warhead in its role as
10152-591: The progress of the program, India successfully developed indigenously all the restricted components denied to it by the MTCR. The starting of India's missile program influenced Pakistan to scramble its resources to meet the challenge. Like India, Pakistan faced hurdles to operationalize its program since education on space sciences was never sought. It took Pakistan decades of expensive trial errors before their program became feasible for military deployment. The Prithvi missile (from Sanskrit पृथ्वी pṛthvī "Earth")
10260-428: The remains of the split atomic nuclei. Many fission products are either highly radioactive (but short-lived) or moderately radioactive (but long-lived), and as such, they are a serious form of radioactive contamination . Fission products are the principal radioactive component of nuclear fallout . Another source of radioactivity is the burst of free neutrons produced by the weapon. When they collide with other nuclei in
10368-481: The safety arming and detonation mechanism enables a controlled detonation sequence. A self-destruct device is also integrated. It is propelled by a solid fuelled booster stage. The missile has a terminal guidance system capable of working through electronic countermeasures . The entire Akash SAM system allows for attacking multiple targets (up to 4 per battery). The Akash missile's use of ramjet propulsion system allows it to maintain its speed without deceleration, unlike
10476-402: The surrounding material, the neutrons transmute those nuclei into other isotopes, altering their stability and making them radioactive. The most commonly used fissile materials for nuclear weapons applications have been uranium-235 and plutonium-239 . Less commonly used has been uranium-233 . Neptunium-237 and some isotopes of americium may be usable for nuclear explosives as well, but it
10584-498: The survival of the state were at stake. Another deterrence position is that nuclear proliferation can be desirable. In this case, it is argued that, unlike conventional weapons, nuclear weapons deter all-out war between states, and they succeeded in doing this during the Cold War between the U.S. and the Soviet Union . In the late 1950s and early 1960s, Gen. Pierre Marie Gallois of France, an adviser to Charles de Gaulle , argued in books like The Balance of Terror: Strategy for
10692-548: The tail. However, internal schema shows a completely modernised layout, including an onboard computer with special optimised trajectories, and an all-digital proximity fuse. The Akash system meant for the Army uses the T-72 tank chassis for its launcher and radar vehicles. The Rajendra derivative for the Army is called the Battery Level Radar-III. The Air Force version uses an Ashok Leyland truck platform to tow
10800-649: The three service chiefs were designated as the Chief of the Army Staff , the Chief of the Naval Staff and the Chief of the Air Staff . The heads of the three services of Indian Armed Forces are: The SRIJAN is a portal launched by MoD to take up the products imported for indigenisation. According to Ministry; it displays defence products that have been imported recently and will tag with the Defence Public sector undertakings , Ordinance Factory Board and others to push for its domestic manufacturing for exports in future. Nuclear weapon A nuclear weapon
10908-662: The user Trial Directive to verify the Akash's consistency in engaging targets. The following trials were conducted: Against low-flying near-range target, long-range high-altitude target, crossing and approaching target and ripple firing of two missiles from the same launcher against a low-altitude receding target. Following this, the IAF declared that it would initiate the induction of 2 squadrons strength (each squadron with 2 batteries) of this missile system, to begin with. Once deliveries are complete, further orders would be placed to replace retiring SA-3 GOA (Pechora) SAM systems. In February 2010,
11016-446: The weapon system and difficult to defend against the delivery of the weapon during a potential conflict. This can mean keeping weapon locations hidden, such as deploying them on submarines or land mobile transporter erector launchers whose locations are difficult to track, or it can mean protecting weapons by burying them in hardened missile silo bunkers. Other components of nuclear strategies included using missile defenses to destroy
11124-631: The world where there exists a single nuclear-weapon state. Aside from the public opinion that opposes proliferation in any form, there are two schools of thought on the matter: those, like Mearsheimer, who favored selective proliferation, and Waltz, who was somewhat more non- interventionist . Interest in proliferation and the stability-instability paradox that it generates continues to this day, with ongoing debate about indigenous Japanese and South Korean nuclear deterrent against North Korea . The threat of potentially suicidal terrorists possessing nuclear weapons (a form of nuclear terrorism ) complicates
11232-624: The yield comes from the final fissioning of depleted uranium. Virtually all thermonuclear weapons deployed today use the "two-stage" design described to the right, but it is possible to add additional fusion stages—each stage igniting a larger amount of fusion fuel in the next stage. This technique can be used to construct thermonuclear weapons of arbitrarily large yield. This is in contrast to fission bombs, which are limited in their explosive power due to criticality danger (premature nuclear chain reaction caused by too-large amounts of pre-assembled fissile fuel). The largest nuclear weapon ever detonated,
11340-658: Was abolished and the Army Department took over its functions. The Army Department was redesignated as the Defence Department in January 1938. The Department of Defence became the Ministry of Defence under a cabinet minister in August 1947. The responsibility for national defence "rests with the Cabinet, which is discharged through the Ministry of Defence, which provides the policy framework and wherewithal to
11448-596: Was conducted in 1990, with development flights up to March 1997. The IAF has initiated the process to induct the Akash surface-to-air missiles developed as a part of the Integrated Guided Missile Development Programme. The Multiple target handling capability of Akash weapon system was demonstrated by live firing in a C4I environment during the trials. Two Akash missiles intercepted two fast moving targets in simultaneous engagement mode in 2005 itself. The Akash System's 3-D central acquisition radar (3-D car) group mode performance
11556-744: Was the Special Atomic Demolition Munition , or SADM, sometimes popularly known as a suitcase nuke . This is a nuclear bomb that is man-portable, or at least truck-portable, and though of a relatively small yield (one or two kilotons) is sufficient to destroy important tactical targets such as bridges, dams, tunnels, important military or commercial installations, etc. either behind enemy lines or pre-emptively on friendly territory soon to be overtaken by invading enemy forces. These weapons require plutonium fuel and are particularly "dirty". They also demand especially stringent security precautions in their storage and deployment. Small "tactical" nuclear weapons were deployed for use as antiaircraft weapons. Examples include
11664-451: Was then fully established. In December 2007 Indian Air Force completed user trials for the Akash missile system. The trials, which were spread over ten days, were successful, and the missile hit its target on all five occasions. Before the ten-day trial at Chandipur, the Akash system's ECCM Evaluation tests were carried out at Gwalior Air force base while mobility trials for the system vehicles were carried out at Pokhran. The IAF had evolved
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