Summary of Resent Studies of Cryosorbers for LHC Long Straight Sections

The vacuum chamber inside some cryogenic elements in the Long Straight Sections of Large Hadron Collider (CERN, Switzerland) will have cold bore at 4.5 K and a beam screen at temperature between 5 and 20 K. In such chamber the desorbed molecules of H2will be pumped through pumping holes on the beam screen onto a cryosorber placed between the cold bore and beam screen. The search of perspective cryosorber for collider is described in this paper.