论文信息 - RESULTS AND EXPERIENCEWITH SINGLE CAVITY TESTS OF MEDIUM BETA SUPERCONDUCTING QUARTER WAVE RESONATORS AT TRIUMF

RESULTS AND EXPERIENCEWITH SINGLE CAVITY TESTS OF MEDIUM BETA SUPERCONDUCTING QUARTER WAVE RESONATORS AT TRIUMF

A heavy ion superconducting linac is being installed at ISAC/TRIUMF. A first stage of the ISAC-II upgrade will see the installation of 20 quarter wave bulk niobium cavities (βo=0.057, 0.071). The cavities operate CW at 106MHz with design peak fields of Ep=30MV/m, Bp=60mT while delivering an accelerating voltage of 1.08MV at <7W power consumption. All cavities have been tested in a single cavity test stand with twenty of twenty-one meeting ISAC-II specifications. The cavity test results will be presented. In particular we will discuss our experience with BCP vs. EP surface treatments and with Q-disease. In addition the tuning plates of two of the cavities were modified to provide a unique compensation to the resonant frequency.

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