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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Abdul Qadeer Khan | 3/9 | https://en.wikipedia.org/wiki/Abdul_Qadeer_Khan | reference | science, encyclopedia | 2026-05-05T17:40:01.271952+00:00 | kb-cron |
In April 1976, Khan joined the atomic bomb program and became part of the enrichment division, initially collaborating with Khalil Qureshi – a physical chemist. Calculations performed by him were invaluable contributions to centrifuges and a vital link to nuclear weapon research, but continue to push for his ideas for feasibility of weapon-grade uranium even though it had a low priority, with most efforts still aimed to produce military-grade plutonium. Because of his interest in uranium metallurgy and his frustration at having been passed over for director of the uranium division (the job was instead given to Bashiruddin Mahmood), Khan refused to engage in further calculations and caused tensions with other researchers. Khan became highly unsatisfied and bored with the research led by Mahmood – finally, he submitted a critical report to Bhutto, in which he explained that the "enrichment program" was nowhere near success. Upon reviewing the report, Bhutto sensed a great danger as the scientists were split between military-grade uranium and plutonium and informed Khan to take over the enrichment division from Mahmood, who separated the program from PAEC by founding the Engineering Research Laboratories (ERL). The ERL functioned directly under the Army's Corps of Engineers, with Khan being its chief scientist, and the army engineers located the national site at isolated lands in Kahuta for the enrichment program as ideal site for preventing accidents. The PAEC did not forgo their electromagnetic isotope separation program, and a parallel program was led by Ghulam Dastagir Alam at the Air Research Laboratories (ARL) located at Chaklala Airbase, even though Alam had not seen a centrifuge, and only had a rudimentary knowledge of the Manhattan Project. During this time, Alam accomplished a great feat by perfectly balancing the rotation of the first generation of centrifuge to ~30,000 rpm and was immediately dispatched to ERL which was suffering from many setbacks in setting up its own program under Khan's direction based on centrifuge technology dependent on URENCO's methods. Khan eventually committed to work on problems involving the differential equations concerning the rotation around fixed axis to perfectly balance the machine under influence of gravity and the design of first generation of centrifuges became functional after Khan and Alam succeeded in separating the 235U and 238U isotopes from raw natural uranium. In the military circles, Khan's scientific ability was well recognised and was often known with his moniker "Centrifuge Khan" and the national laboratory was renamed after him upon the visit of President Muhammad Zia-ul-Haq in 1983. In spite of his role, Khan was never in charge of the actual designs of the nuclear devices, their calculations, and eventual weapons testing which remained under the directorship of Munir Ahmad Khan and the PAEC. The PAEC's senior scientists who worked with him and under him remember him as "an egomaniacal lightweight" given to exaggerating his scientific achievements in centrifuges. At one point, Munir Khan said that, "most of the scientists who work on the development of atomic bomb projects were extremely 'serious'. They were sobered by the weight of what they don't know; Abdul Qadeer Khan is a showman." During the timeline of the bomb program, Khan published papers on analytical mechanics of balancing of rotating masses and thermodynamics with mathematical rigour to compete, but still failed to impress his fellow theorists at PAEC, generally in the physics community. In later years, Khan became a staunch critic of Munir Khan's research in physics, and on many occasions tried unsuccessfully to belittle Munir Khan's role in the atomic bomb projects. Their scientific rivalry became public and widely popular in the physics community and seminars held in the country over the years.
=== Nuclear tests: Chagai-I ===
Many of his theorists were unsure that military-grade uranium would be feasible on time without the centrifuges, since Alam had notified PAEC that the "blueprints were incomplete" and "lacked the scientific information needed even for the basic gas-centrifuges". Calculations by Tasneem Shah, and confirmed by Alam, showed that Khan's earlier estimation of the quantity of uranium needing enrichment for the production of weapon-grade uranium was possible, even with the small number of centrifuges deployed. Khan produced the designs of the centrifuges from URENCO. However, they were riddled with serious technical errors, and while he bought some components for analysis, they were broken pieces, making them useless for quick assembly of a centrifuge. Its separative work unit (SWU) rate was extremely low, so that it would have to be rotated for thousands of RPMs at the cost of millions of taxpayers money, Alam maintained. Though Khan's knowledge of copper metallurgy greatly aided the innovation of centrifuges, it was the calculations and validation that came from his team of fellow theorists, including mathematician Tasneem Shah and Alam, who solved the differential equations concerning rotation around a fixed axis under the influence of gravity, which led Khan to come up with the innovative centrifuge designs.