Author/Authors :
K. Kanazawa*، نويسنده , , S. Kato، نويسنده , , Y. Suetsugu*، نويسنده , , H. Hisamatsu، نويسنده , ,
M. Shimamoto، نويسنده , , M. Sato، نويسنده , , M. Shirai، نويسنده ,
Abstract :
The operation of the KEKB accelerator at KEK started on December 1998 after about 4 yearsʹ construction. More than
2000 vacuum chambers and their attachments were installed progressing through some stages in last 2 years. Each stage was
set with speci®ed procedure and under careful quality control. The average base pressure in the order of 10ÿ8 Pa just before
the commissioning, and the following decrease of photon stimulated gas desorption proved the validity of our procedures.
# 2001 Elsevier Science B.V. All rights reserved
Keywords :
Copper chamber , quality control , Accelerator , Ultra-high vacuum , Vacuum system
