Improvement in 3d Computation of Rf-losses in Resonant Cavities
نویسندگان
چکیده
In 1997, a cold model of a so-called optimized proton accelerating structure was measured. It turned out that predictions of RF losses in the region of coupling holes had been dramatically under-estimated by the simulation codes. Since that time, a study made on the IPHI RFQ [1] pumping slots showed that the problem occurred when a surface current line runs along a sharp reentrant corner. This suggested a new way to compute losses and lead to an improvement in the MAFIA post-processor. We tested this new tool on the Trispal cavity geometry: the computed Q-drop caused by coupling slots is now very close to experimental values.
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