Title :
L-band superconducting cavities at KEK for TESLA
Author :
Saito, K. ; Noguchi, S. ; Kako, E. ; Ono, M. ; Shishido, T. ; Tajima, T. ; Matsuoka, M. ; Miwa, H. ; Suzuki, T. ; Umezawa, Hitoshi
Author_Institution :
KEK, Nat. Lab. for High Energy Phys., Ibaraki, Japan
Abstract :
An attractive future application of superconducting cavities is a TeV energy superconducting linear collider (TESLA). The substantial merits of TESLA compared to a normal conducting linear collider are to loosening of alignment tolerance and less wake field due to the lower frequency (1.3 GHz). The final focus also is easier to obtain by having the electron/positron population in bunches. TESLA demands upgrading field gradients to over 25 MV/m. KEK has been carrying out R&D on 1.3 GHz niobium superconducting cavities since 1990. So far, seven single cell cavities and two 9-cell cavities have been fabricated and tested. In parallel, input coupler design and niobium material studies are being conducted. This paper reports the present status of KEK´s efforts for TESLA
Keywords :
beam handling equipment; cavity resonators; electron accelerators; linear accelerators; superconducting microwave devices; 1 TeV; 1.3 GHz; L-band; Nb; Nb cavity; TESLA; alignment tolerance; final focus; input coupler; superconducting cavities; wake field; Annealing; Conducting materials; Electrons; High temperature superconductors; L-band; Niobium; Surface contamination; Surface resistance; Testing; Water pollution;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.308695
