cryosorption pump

cryosorption pump

[‚krī·ə′sȯrp·shən ‚pəmp]
(mechanical engineering)
A high-vacuum pump that employs a sorbent such as activated charcoal or synthetic zeolite cooled by nitrogen or some other refrigerant; used to reduce pressure from atmospheric pressure to a few millitorr.
References in periodicals archive ?
In dewars where a physical getter, such as a molecular sieve, is placed in good thermal contact with a cryogenically-cooled wall to act as a cryosorption pump for water vapor during subsequent operation, the pressure disparity during pumpdown is more pronounced.