Research on fast pre-tuning method of 9-cell superconducting cavities

cell number	perturbation amount $ {e}_{\mathrm{r}\mathrm{e}\mathrm{f}}/{10}^{-4} $	perturbation amount $ {e}_{\mathrm{D}\mathrm{E}\mathrm{S}\mathrm{Y}}/{10}^{-4} $	perturbation amount $ {e}_{\mathrm{C}\mathrm{o}\mathrm{r}\mathrm{n}\mathrm{e}\mathrm{l}\mathrm{l}}/{10}^{-4} $
1	5	4.96	6.21
2	4	3.93	4.18
3	−4	−4.03	−4.84
4	2	2.02	1.90
5	−3	−2.99	−2.70
6	2	2.03	1.97
7	−1	−0.99	−1.35
8	−4	−3.99	3.50
9	6	6.02	5.92

Table 2. Comparison of perturbation percentage error of DESY and Cornell pre-tuning method

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Table 2. Comparison of perturbation percentage error of DESY and Cornell pre-tuning method

cell number	percentage error $ {E}_{\mathrm{D}\mathrm{E}\mathrm{S}\mathrm{Y}} $/%	percentage error $ {E}_{\mathrm{C}\mathrm{o}\mathrm{r}\mathrm{n}\mathrm{e}\mathrm{l}\mathrm{l}} $/%
1	−0.84	24.14
2	−1.87	4.61
3	0.71	20.96
4	0.94	−4.94
5	−0.47	−9.98
6	1.41	−1.42
7	−1.46	35.15
8	−0.03	−12.49
9	0.25	−1.26

Table 3. Perturbation RMS error of DESY and Cornell method with different field flatness

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Table 3. Perturbation RMS error of DESY and Cornell method with different field flatness

field flatness/%	RMSE $ {\eta }_{\mathrm{d}\mathrm{e}\mathrm{s}\mathrm{y}}/{10}^{-4} $	RMSE $ {\eta }_{\mathrm{C}\mathrm{o}\mathrm{r}\mathrm{n}\mathrm{e}\mathrm{l}\mathrm{l}}/{10}^{-4} $
60	0.055	2.11
70	0.076	2.74
80	0.033	0.96
90	0.015	0.45

Table 4. Pre-tuning time of different methods for 95% field flatness (FF)
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Table 4. Pre-tuning time of different methods for 95% field flatness (FF)
method number of cells tuned measure time/h tuning time/h total time/h
Cornell only 22 (FF ＞ 95%) 0.2 6.6 6.8
DESY only 9 (FF ＜ 90%) 0.6 2.7 3.3
combined method 13 (FF ＞ 95%) 0.9 3.9 4.8

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Hang Zhu, Jiyuan Zhai, Jianping Dai. Research on fast pre-tuning method of 9-cell superconducting cavities[J]. High Power Laser and Particle Beams, 2022, 34(10): 104015

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Paper Information

Category: High Brightness Beam Physics and Technology

Received: Mar. 5, 2022

Accepted: --

Published Online: Sep. 9, 2022

The Author Email: Zhai Jiyuan (zhaijy@ihep.ac.cn)

DOI:10.11884/HPLPB202234.220061

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Comparison of perturbation calculation results between DESY and Cornell pre-tuning method

Table 1. Comparison of perturbation calculation results between DESY and Cornell pre-tuning method

Table 2. Comparison of perturbation percentage error of DESY and Cornell pre-tuning method

Table 2. Comparison of perturbation percentage error of DESY and Cornell pre-tuning method

Table 3. Perturbation RMS error of DESY and Cornell method with different field flatness

Table 3. Perturbation RMS error of DESY and Cornell method with different field flatness

Table 4. Pre-tuning time of different methods for 95% field flatness (FF)

Table 4. Pre-tuning time of different methods for 95% field flatness (FF)