Abstract
A vertical test of the β = 0.12 half-wave resonator prototype at the Rare Isotope Science Project (RISP) was done at TRIUMF, Canada. The design goal of Q0 = 1.9 × 109 at an accelerating gradient of Eacc = 6.3 MV/m at 2 K was achieved. Moreover, the residual resistance, the sensitivity against helium pressure fluctuations, and the Lorentz force detuning were also measured. The performance was limited by field emission at around Eacc = 8.1 MV/m. In addition to the vertical test result, the surface processing is described in this paper.
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