Title :
UHV seal studies for the Advanced Photon Source storage ring vacuum system
Author :
Gonczy, J.D. ; Ferry, R.J. ; Niemann, R.C. ; Roop, B.
Author_Institution :
Argonne Nat. Lab., IL, USA
Abstract :
The Advanced Photon Source (APS) storage ring vacuum chambers (SRVCs) are constructed of aluminum. The chamber design incorporates aluminum alloy 2219-T87 Conflat flanges welded to an aluminum alloy 6063-T5 extruded chamber body. Vacuum connections to the aluminum Conflat chamber flanges are provided by 304 stainless steel Conflat flanges. To evaluate the Conflat seal assemblies relative to vacuum bake cycles, a conflat bake test assembly (CBTA) was constructed, and thermal cycling tests were performed between room temperature and 150 degrees C on both stainless steel to aluminum Conflat assemblies and aluminum to aluminum conflat assemblies. A Helicoflex bake test assembly (HBTA) was similarly constructed to evaluate Helicoflex seals. Both Conflat and Helicoflex seals were studied in a SRVC sector string test arrangement of five SRVC sections. The CBTA, HBTA, and SRVC tests and their results are reported.<>
Keywords :
beam handling equipment; particle accelerator accessories; storage rings; vacuum apparatus; 20 to 150 degC; 2219-T87 Conflat flanges; 304 stainless steel Conflat flanges; 6063-T5 extruded chamber body; APS; Advanced Photon Source storage ring vacuum system; Al; Helicoflex bake test assembly; Helicoflex seals; SRVC sector string test; UHV seal; chamber design; conflat bake test assembly; thermal cycling tests; vacuum bake cycles; Aluminum alloys; Assembly; Flanges; Performance evaluation; Seals; Steel; Storage rings; Temperature; Testing; Welding;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164948
