多单元超导腔场平滑度调谐器的设计与测试

The Design and Test of the Warm Tuner for Multi-Cell Medium β SRF Cavity

为了纠正多单元中β射频超导腔在制造过程中由于加工误差和焊接收缩引起的场频率偏移,参照超导腔特性和场平滑度调谐原理设计了多单元超导腔场平滑度调谐器,根据超导腔场平滑度的测试要求搭建了测试系统,并将调谐器用于多单元中β射频超导腔场平滑度的调制过程。测试和实验结果表明:多单元中β射频超导腔场平滑度调谐器可以成功用于超导腔场平滑度的调制。

In order to correct the field frequency deviation caused by the machining error and the welding shrinkage in the manufacturing process of the multi-cell medium β SRF cavity, a regulating mechanism-warm tuner is designed based on the multicell medium β SRF cavity＇s characteristics and the field flatness principle. The tuner contains five parts, which are the activity carriage, the gearbox carriage, the tailstock, the activity tailstock and the bed body. The warm tuner is used in the test of the field flatness and the field frequency of a medium β SRF cavity. Finally, the test system of the RF superconducting cavity field flatness is set, detailed analyses and designs of the bead-pulling system, the network analyzer and the microcomputer control system are carried out. The microcomputer control system uses the virtual instrument Lab VIEW software as the platform to control the other parts in the test system, and to analyze the test results, to present the test results. The results show that the medium β SRF cavity warm tuner can be successfully used for the test and modulation.