PT Journal
AU Degiovanni, A
   Wuensch, W
   Giner Navarro, J
TI Comparison of the conditioning of high gradient accelerating structures
SO Physical Review Accelerators and Beams
JI Phys. Rev. Accel. Beams
PY 2016
BP 032001
EP 6pp
VL 19
IS 3
DI 10.1103/PhysRevAccelBeams.19.032001
LA English
AB Accelerating gradients in excess of 100 MV/m, at very low breakdown rates, have been successfully achieved in numerous prototype CLIC accelerating structures. The conditioning and operational histories of several structures, tested at KEK and CERN, have been compared and there is clear evidence that the conditioning progresses with the number of rf pulses and not with the number of breakdowns. This observation opens the possibility that the optimum conditioning strategy, which minimizes the total number of breakdowns the structure is subject to without increasing conditioning time, may be to never exceed the breakdown rate target for operation. The result is also likely to have a strong impact on efforts to understand the physical mechanism underlying conditioning and may lead to preparation procedures which reduce conditioning time.
ER