A cryogenic pump of 20,000 l s−1

doi:10.1016/S0042-207X(82)80003-1

Vacuum

Volume 32, Issue 2, 1982, Pages 95-97

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This pump belongs to the vacuum system of GANIL. GANIL is a particle accelerator in construction in Caen¹ consisting principally of two separated sector cyclotrons. To pump a total surface of about 1000 m² it has been decided to install a cryogenic pump of 20,000 l s. This system must be able to maintain a pressure of 2.10⁻⁶ Pa (2.10⁻⁸ torr) in the vacuum chamber of the SSC over a period of at least one month without regeneration by warm-up.

References (3)

G Rommel, The vacuum system of GANIL, Proc 8th Int Vacuum Congress, vol...

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HIRFL is a multi-accelerator complex for heavy ions now under construction. Its final stage comprises a separated sector cyclotron. This paper describes the pumping aspects of its vacuum system. The single piece vacuum vessel with a volume of 100 m³ has been constructed in situ. Eight cryopumps of the type RKP 800 with a combined pumping speed of 160 m³ s⁻¹ enable a pressure in the 10⁻⁶ Pa region to be obtained. Two turbo-molecular pumps of the type TPH 5000 have been chosen as auxiliary pumps. In addition a fore-vacuum system and a supply of liquid nitrogen for the shielding of the cryopumps have been provided. During the first evacuation of the system in September 1986 a pressure of 8 × 10⁻⁶ Pa has been obtained.
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