Lev Andreyevich Artsimovich (Russian: Лев Андреевич Арцимович, February 25, 1909 – March 1, 1973), also transliterated Arzimowitsch, was a Soviet physicist known for his contributions to the Tokamak— a device that produces controlled thermonuclear fusion power.

: 137, 139 [4] In 1945, Artsimovich joined the Soviet program of nuclear weapons, working on an electromagnetic method of isotope separation of uranium at Laboratory No.

: 123 [6] But the uranium enrichment under Artsimovich failed when it proved too costly since the electricity required for this work could not be produced by the Soviet power grid at that time.

: 171 [5] Despite being removed by Beria, Artsimovich continued work on gas discharges with support from Kurchatov at his Laboratory No.

[1] In 1966, he visited the United States to deliver a lecture on fusion and Tokamak technology at MIT, and was elected a Foreign Honorary Member of the American Academy of Arts and Sciences.