| Paper | Title | Page |
|---|
| WEP19 | Cryogenic system for BEPCII superconducting cavities | 486 |
| | - Y. P. Liu, S. P. Li, K. He, M. J. Sang, R. Ge, C. W. Lv, L. Bian, Z. Zhang
IHEP, CAS
| |
| | In order to improve the luminosity of the Beijing
electron positron collider, two KEKB type 500MHz
superconducting cavities are adopted in the upgrade
project which is named as BEPCII. These two cavities are
installed in e+ and e- ring, respectively. They are cooled
in liquid helium bath contained in a vacuum insulated
vessel. Cryogenic system is designed and constructed to
provide the superconducting operating circumstance for
the cavities. This paper is dedicated to briefly introduce
the BEPCII rf side cryogenic system. | |
| WEP82 | The measurements of static heat loss and unloaded Q0 on the BEPCII SRF cavities | 708 |
| | - L. Bian, S. P. Li, Y. P. Liu
IHEP, CAS
| |
| | The static heat loss and unloaded Q0 are most
important values for both cryogenic system and RF
system. The BEPCII SRF cavity operates in a liquid
helium bath contained in a vacuum insulated, liquid
nitrogen cooled radiation shielded vessel. During
horizontal test at the test station, thermodynamic method
is used to measure and calculate the static loss and Q0 of
SRF cavity. This paper has briefly introduced the method
and process to measure the static loss and Q0 of the SRF
cavity. Results under different experimental conditions
are also given. These results are also used as important
data for acceptance test of the SRF cavities. | |