Design and studies on the traveling wave transverse RF deflecting structure

ZHANG Jing-Ru; HOU Mi; DAI Jian-Ping; PEI Shi-Lun; PEI Guo-Xi

doi:10.1088/1674-1137/32/3/015

Chinese Physics C> 2008, Vol. 32> Issue(3) : 232-235 DOI: 10.1088/1674-1137/32/3/015

Design and studies on the traveling wave transverse RF deflecting structure

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Abstract：
With the development of free electron laser (FEL) and the international linear collider (ILC), the electron bunch length is getting smaller and smaller. The traveling-wave transverse RF deflecting structure is an important part of the RF deflecting method for bunch length measurement and phase space diagnostics. The operation mode in RF deflector is the ``TM₁₁-like'' mode. Since the TM₁₁-like mode in this structure has a pair of degenerate dipole modes, two additional holes are provided on either side of each iris to stabilize the mode. The simulation and optimization have been done. A prototype has been fabricated and tested. The cold test results have been compared with the simulations of the first three modes.

References

[1]

. Patrick Krejcik. Short Bunch Beam Diagnostics, SLAC-PUB-9527. 20022. WANG X J. Producing and Measuring Small Electron Bunches. Proceedings of the 1999 Particle Acceleratoe Conference. New York, 1999. 229-2333. Paul Emma, Josef Frisch, Patrick Krejcik. A Transverse RF Deflecting Structure for Bunch Length and Phase Space Diagnostics, LCLS-TN-00-124. Loew G A, Altenmueller O H. Design and Applications of RF Deflecting Structure at SLAC, PUB-135. Aug. 19655. Frohlich L et al. Longitudinal Bunch Shape Diagnostic with Coherent Radiation and a Transverse Deflecting Cavity at TTF2, SLAC-PUB-113876. Hahn H, Halama H J. R.S.I., 1965, 35(12): 17887. YAO C G. Electron Linac. Beijing: Science Press, 1986 (in Chinese)8. YAO C G, LUO Y X. Atomic Energy Science and Technology, 1984, 5: 602 (in Chinese)9. Hahn H. R.S.I., 1963, 34(10): 109410. Hahn H, Halama H J. Nucl. Instrum. Methods, 1966, 45:141-150

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ZHANG Jing-Ru, HOU Mi, DAI Jian-Ping, PEI Shi-Lun and PEI Guo-Xi. Design and studies on the traveling wave transverse RF deflecting structure[J]. Chinese Physics C, 2008, 32(3): 232-235. doi: 10.1088/1674-1137/32/3/015

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Received: 2007-04-04
Revised: 2007-05-09

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沈阳化工大学材料科学与工程学院沈阳 110142

Design and studies on the traveling wave transverse RF deflecting structure

Corresponding author: ZHANG Jing-Ru,

Received Date: 2007-04-04
Accepted Date: 2007-05-09
Available Online: 2008-03-05

Abstract:

With the development of free electron laser (FEL) and the international linear collider (ILC), the electron bunch length is getting smaller and smaller. The traveling-wave transverse RF deflecting structure is an important part of the RF deflecting method for bunch length measurement and phase space diagnostics. The operation mode in RF deflector is the ``TM₁₁-like'' mode. Since the TM₁₁-like mode in this structure has a pair of degenerate dipole modes, two additional holes are provided on either side of each iris to stabilize the mode. The simulation and optimization have been done. A prototype has been fabricated and tested. The cold test results have been compared with the simulations of the first three modes.