Title :
Development of HOM damper for B-factory (KEKB) superconducting cavities
Author :
Tajima, T. ; Asano, K. ; Furuya, T. ; Izawa, M. ; Mitsunobu, S. ; Takahashi, T. ; Gamo, N. ; Iida, S. ; Ishi, Y. ; Kijima, Y. ; Kokura, S. ; Kudo, M. ; Sennyu, K. ; Tachibana, S. ; Takashina, H. ; Taniyama, N.
Author_Institution :
Nat. Lab. for High Energy Phys., Ibaraki, Japan
Abstract :
Higher order mode (HOM) power excited in superconducting cavities can be on the order of kW in the B-factory due to high current. To extract this power, cavities are designed so that HOM can travel out through beam pipes and be absorbed in a lossy material. Ferrite has been investigated as a candidate material for the absorber. Due to its low tensile strength, bonding of tiles has been a problem. To solve this problem, we started R and D on the sinter-bonding of ferrite powder directly on the inner surface of a copper pipe using hot isostatic pressing. In this paper, we describe the manufacturing process, low power test, high power test and outgassing rate measurement of the manufactured dampers
Keywords :
accelerator cavities; adhesion; copper; electron accelerators; powder technology; sintering; storage rings; superconducting cavity resonators; Cu; Cu pipe; Fe-O; HOM damper; KEKB; ferrite powder; high power test; higher order mode damper; hot isostatic pressing; low power test; outgassing rate; sinter-bonding; superconducting cavities; tiles; Bonding; Copper; Ferrites; Manufacturing processes; Powders; Pressing; Research and development; Superconducting materials; Testing; Tiles;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505306
