RF-TEST OF A 324-MHz, 3-MeV, H- RFQ STABILIZED WITH PISL'S
نویسنده
چکیده
A 324-MHz, 3.115-m long, four-vane-type, radio-frequency quadrupole (RFQ) linac, which will be used as the most upstream accelerating cavity of the KEK/JAERI Joint Project for high-intensity proton accelerator facility, is under development at KEK. It was designed to accelerate a 30-mA H beam from 50 keV to 3 MeV with a 3% duty factor. The accelerating field of the RFQ cavity are stabilized against dipole-mode mixing by using 14 pairs of π-mode stabilizing loops (PISL's). The significantly large frequency separation of 23.3 MHz between the accelerating mode and the nearest dipole mode were attained. By tuning the positions of 22 stub-tuners, a uniform accelerating filed distribution within errors of ±0.6% both longitudinally and azimuthally were easily achieved.
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