Chinese Physics C > 2001, Vol. 25 > Issue(2): 160-166

Higher Order Mode Measurements in a X-Band Accelerating Structure

Department of Engineering Physics, Tsinghua University, Beijing 100084, China

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Abstract：
A metallic cage made by sputtering silver film onto a thin nylon thread through a specially designed fixture is used as perturbing object to measure the higher modes in a Xband accelerating structure. The fabrication and calibration of the Cage are described in this paper. It is found that this type of perturbation object has the advantages of high sensitivity and high resolution. Using the cage as bead, the longitudinal electric fields of TM110 mode in a X-band 30cm structure are obtained with bead pull measurements.

References

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Siemann R H. Linear Collider Research and Ceveloment. In: Proc. of 1994 Int. Linac Conf. Tsukuba Japan, 1994.24 2 Higo T. KEK Preprint 94–88, Sep. 1994 3 Maier L C, SlaterJ C. J. Appl Phys., 1952, 23:68 4 Muller M F O et al. Measurements and Numerical Calculations on Higher–Order–Mode–Dampers within a Stack of 36 De–tuned S–Band–Cells. In:Proc. of the XVIIIth Int. Linac Conf. Geneva Switzerland, 1996. 713 5 Yammamoto M. KEK Report 94–9, Feb. 1995 6 TONG De–Chun. DESY M–87–067 TONG De–Chun.DESY M–87–058 TONG De–Chun et al. Atomic Energy Science And Technology, 1994, 28(2):97 (in Chinese)(童德春等. 原子能科学与技术,1994,28(2):97) 9 Matthews P J et al. IEEE Trans. on MTT, 1996,44(8): 1401

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XIAO Li-Ling, LIANG Yu-Zhong, TONG De-Chun and ZHANG Hua-Yi. Higher Order Mode Measurements in a X-Band Accelerating Structure[J]. Chinese Physics C, 2001, 25(2): 160-166.

XIAO Li-Ling, LIANG Yu-Zhong, TONG De-Chun and ZHANG Hua-Yi. Higher Order Mode Measurements in a X-Band Accelerating Structure[J]. Chinese Physics C, 2001, 25(2): 160-166. shu

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Received: 2000-01-17
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Higher Order Mode Measurements in a X-Band Accelerating Structure

Corresponding author:XIAO Li-Ling,

Department of Engineering Physics, Tsinghua University, Beijing 100084, China

Received Date:2000-01-17
Accepted Date:1900-01-01
Available Online:2001-02-05

Abstract:A metallic cage made by sputtering silver film onto a thin nylon thread through a specially designed fixture is used as perturbing object to measure the higher modes in a Xband accelerating structure. The fabrication and calibration of the Cage are described in this paper. It is found that this type of perturbation object has the advantages of high sensitivity and high resolution. Using the cage as bead, the longitudinal electric fields of TM110 mode in a X-band 30cm structure are obtained with bead pull measurements.