DARYL OSHATZ and STEVE VIROSTEK

Ti-Sapphire Crystal Cryogenic Cooling Concept May 2, 2002
Four pulse tube cooling heads (Cryomech PT60) are attached to the copper cooling plate with flexible copper straps.  The crystal is held to the bottom of the copper plate with a clamp, spring loaded with bellevile washers.

(click on images to enlarge)

Cooling heads are attached to the coldplate with braided copper strips.
The crystal is clamped to the coldplate with spring loaded bolts.
The coldplate is mounted to the vacuum chamber on a stainless steel support cylinder.
A bellows vacuum feedthrough allows the pitch of the crystal assembly to be adjusted under vacuum.
Drawing showing preliminary design
Coldplate dimensions
Detailed view of clamp
Detailed view of G10 insulating bushing
Detailed view of pitch adjustment
Detailed view of support cylinder pivot

The Pro/E conceptual design models and drawing of the Cryo-Crystal Assembly are available in Intralink in the folder: Root Folder/Projects/CBP/cryo-crystal
The files are also available in Pro/E format here: zipped files


Daryl Oshatz
EMAIL: daryl_oshatz@lbl.gov
LAWRENCE BERKELEY NATIONAL LABORATORY
ONE CYCLOTRON ROAD, MS 71-259
BERKELEY, CALIFORNIA 94720
PHONE: 510-486-6679
FAX: 486-44544