Pyotr Kapitsa
  • Pyotr Kapitsa

  • Date of birth: July 08, 1894
  • Died: April 08, 1984
  • Born: in Kronstadt, Russian Empire, Russian Federation.

  • Description: Pyotr Leonidovich Kapitsa or Peter Kapitza (Russian Пётр Леони́дович Капи́ца) (8 July [O.S. 26 June] 1894 – 8 April 1984) was a leading Soviet physicist and Nobel laureate.

    Kapitsa was born in Kronstadt, Russian Empire to Leonid Petrovich Kapitsa, a military engineer who constructed fortifications. Kapitsa's studies were interrupted by the First World War, in which he served as an ambulance driver for two years on the Polish front. He graduated from the Petrograd Polytechnical Institute in 1918. He subsequently studied in Britain, working for over ten years with Ernest Rutherford in the Cavendish Laboratory at Cambridge University, and founding the influential Kapitza club. He was made a Fellow of the Royal Society in 1929 and was the first director (1930–34) of the Mond Laboratory in Cambridge. In the 1920s he originated techniques for creating ultrastrong magnetic fields by injecting high current for brief periods into specially constructed air-core electromagnets. In 1928 he discovered the linear dependence of resistivity on magnetic field for various metals in very strong magnetic fields.In the 1930s he started doing low temperature research, beginning with a critical analysis of the existing methods for obtaining low temperatures. In 1934 he developed new and original apparatus (based on the adiabatic principle) for making significant quantities of liquid helium.Kapitsa formed the Institute for Physical Problems, in part using equipment which the Soviet government bought from the Mond Laboratory in Cambridge (with the assistance of Rutherford.In Russia, Kapitsa began a series of experiments to study liquid helium, leading to the discovery in 1937 of its superfluidity. He reported the properties of this new state of matter in a series of papers, for which he was later awarded the Nobel Prize in Physics "for basic inventions and discoveries in the area of low-temperature physics". In 1939 he developed a new method for liquefaction of air with a low-pressure cycle using a special high-efficiency expansion turbine. Consequently, during World War II he was assigned to head the Department of Oxygen Industry attached to the USSR Council of Ministers, where he developed his low-pressure expansion techniques for industrial purposes. He invented high power microwave generators (1950–1955) and discovered a new kind of continuous high pressure plasma discharge with electron temperatures over 1,000,000K.In November 1945, Kapitsa quarreled with Lavrentiy Beria, head of the NKVD, writing to Joseph Stalin about Beria's ignorance of physics and his arrogance. Amazingly, Stalin backed Kapitsa, telling Beria he had to get on with the scientists.Immediately after the war, a group of prominent Soviet scientists (including Kapitsa in particular) lobbied the government to create a new technical university, the Moscow Institute of Physics and Technology. Kapitsa taught there for many years. From 1957, he was also a member of the presidium of the Soviet Academy of Sciences.In 1978, Kapitsa won the Nobel Prize in Physics for the work in low-temperature physics that he had done in about 1937. He shared this prize with Arno Allan Penzias and Robert Woodrow Wilson (who won for work unrelated to Kapitsa's).Kapitsa resistance is the thermal resistance (which causes a temperature discontinuity) at the interface between liquid helium and a solid. The Kapitsa–Dirac effect is a quantum mechanical effect consisting in the diffraction of a well-collimated by a standing wave of light.A minor planet 3437 Kapitsa, discovered by Soviet astronomer Lyudmila Georgievna Karachkina in 1982, is named after him.

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