Method of removing helium in a compound cryopump

Abstract From the Canadian patent

Helium pumping elements as cryopanels for compound cryopumps, cryopumps containing such elements a process for, using such pumps in the removal or pumping of helium from mixtures thereof with deuterium and tritium and methods for preparing such pumps including a method comprising the steps of cleaning chemically a cryogenic support rinsing the, cryogenic support, placing an inorganic bonding agent onto the cryogenic support, sprinkling a granular charcoal sorbent onto the inorganic bonding agent, and curing the inorganic bonding agent.