why was he sent to prison?
He was convicted on 1 March 1950 of four counts of breaking the Official Secrets Act by "communicating information to a potential enemy.
Trial and imprisonment
 was convicted on 1 March 1950 of four counts of breaking the Official Secrets Act by "communicating information to a potential enemy.
who headed up the manhattan project in britain James Chadwick who is he? He was a British physicist. what was he known for? His discovery of the neutron. can you describe this thing he discovered? It is a subatomic particle, symbol or which has a neutral (not positive or negative) charge and a mass slightly greater than that of a proton. why was the above project started? It helped initiate the effort to build the first atomic bombs in the United States during World War II, and helped carry it through to completion in August 1945 by supplying crucial expertise. any other scientist were involved in it? Sir Geoffrey Taylor, James Tuck, Niels Bohr, Peierls, Frisch, and Klaus Fuchs what field did the last scientist study? Mathematics and physics
Espionage He was imprisoned for breaking the Official Secrets Act by "communicating information to a potential enemy. For breaking the Official Secrets Act by "communicating information to a potential enemy."
Klaus Fuchs Klaus Fuchs Klaus Fuchs
Trial and imprisonment Trial and imprisonment Trial and imprisonment
It is likely that Fuchs's espionage led the U.S. to cancel a 1950 Anglo-American plan to give Britain American-made atomic bombs. It is likely that Fuchs's espionage led the U.S. to cancel a 1950 Anglo-American plan to give Britain American-made atomic bombs. He was prosecuted by Sir Hartley Shawcross and was convicted on 1 March 1950 of four counts of breaking the Official Secrets Act by "communicating information to a potential enemy." After a trial lasting less than 90 minutes that was based on his confession, Lord Goddard sentenced him to 14 years' imprisonment, the maximum for espionage, because the Soviet Union was classed as an ally at the time. In December 1950, he was stripped of his British citizenship. The head of the British H-bomb project, Sir William Penney, visited Fuchs in prison in 1952.

While imprisoned, he was friendly with the Irish Republican Army prisoner Seamus Murphy with whom he played chess and helped to escape. It was suggested by some that Fuchs had turned IRA leader Cathal Goulding into a Marxist but Seamus Murphy denied it by saying "Fuchs never tried to turn anyone – it was hard to He was prosecuted by Sir Hartley Shawcross and was convicted on 1 March 1950 of four counts of breaking the Official Secrets Act by "communicating information to a potential enemy." 
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Klaus Fuchs [SEP] Trial and imprisonment
It is likely that Fuchs's espionage led the U.S. to cancel a 1950 Anglo-American plan to give Britain American-made atomic bombs. He was prosecuted by Sir Hartley Shawcross and was convicted on 1 March 1950 of four counts of breaking the Official Secrets Act by "communicating information to a potential enemy." After a trial lasting less than 90 minutes that was based on his confession, Lord Goddard sentenced him to 14 years' imprisonment, the maximum for espionage, because the Soviet Union was classed as an ally at the time. In December 1950, he was stripped of his British citizenship. The head of the British H-bomb project, Sir William Penney, visited Fuchs in prison in 1952.