TY - GEN
T1 - Multipacting analysis of a quarter wave choke joint used for insertion of a demountable cathode into a SRF photoinjector
AU - Burrill, A.
AU - Ben-Zvi, I.
AU - Cole, M.
AU - Rathke, J.
AU - Kneisel, P.
AU - Manus, R.
AU - Rimmer, R.
PY - 2007
Y1 - 2007
N2 - The multipacting phenomena in accelerating structures and coaxial lines are well documented and methods of mitigating or suppressing it are understood. The multipacting that occurs in a quarter wave choke joint designed to mount a cathode insertion stalk into a superconducting RF photoinjector has been analyzed via calculations and experimental measurements and the effect of introducing multipacting suppression grooves into the structure is analyzed. Several alternative choke joint designs are analyzed and suggestions made regarding future choke joint development. Furthermore, the problems encountered in cleaning the choke joint surfaces, factors important in changes to the secondary electron yield, are discussed and evaluated. This design is being implemented on the BNL 1.3 GHz photoinjector,[1] previously used for measurement of the quantum efficiency of bare Nb, to allow for the introduction of other cathode materials for study, and to verify the design functions properly prior to constructing our 703 MHz photoinjector with a similar choke joint design.
AB - The multipacting phenomena in accelerating structures and coaxial lines are well documented and methods of mitigating or suppressing it are understood. The multipacting that occurs in a quarter wave choke joint designed to mount a cathode insertion stalk into a superconducting RF photoinjector has been analyzed via calculations and experimental measurements and the effect of introducing multipacting suppression grooves into the structure is analyzed. Several alternative choke joint designs are analyzed and suggestions made regarding future choke joint development. Furthermore, the problems encountered in cleaning the choke joint surfaces, factors important in changes to the secondary electron yield, are discussed and evaluated. This design is being implemented on the BNL 1.3 GHz photoinjector,[1] previously used for measurement of the quantum efficiency of bare Nb, to allow for the introduction of other cathode materials for study, and to verify the design functions properly prior to constructing our 703 MHz photoinjector with a similar choke joint design.
UR - https://www.scopus.com/pages/publications/51349137505
U2 - 10.1109/PAC.2007.4441311
DO - 10.1109/PAC.2007.4441311
M3 - Conference contribution
AN - SCOPUS:51349137505
SN - 1424409179
SN - 9781424409174
T3 - Proceedings of the IEEE Particle Accelerator Conference
SP - 2544
EP - 2546
BT - Proceedings of the IEEE Particle Accelerator Conference, PAC07
T2 - IEEE Particle Accelerator Conference, PAC07
Y2 - 25 June 2007 through 29 June 2007
ER -