Impact of Coherent Synchrotron Radiation on Beam Qualities in a Chicane

XIANG Dao; HUANG Wen-Hui; HE Xiao-Zhong

Chinese Physics C> 2004, Vol. 28> Issue(5) : 555-559

Impact of Coherent Synchrotron Radiation on Beam Qualities in a Chicane

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

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Abstract：
When the bunch goes through a chicane, the energy will be redistributed within the bunch due to CSR (coherent synchrotron radiation), which would cause nonlinearity. Present theory states that this nonlinearity would add a huge amount to emittance growth. Based on simulation results, this paper would point out that the theory is only valid under an ideal condition that the bunch initially has no nonlinerity and under some given parameters there could be a cancellation between the nonlinearity caused by CSR and the initial nonlinearity. So under these circumstances we can expect CSR to improve the beam quality. This paper provides a brief information about CSR and a full estimation of effects of CSR on beam qualities.

References

[1]

. Wiedemann H. Part icle Accelerat or PhysicsⅡ , Berlin: Springer,1995, 317-3202. Li R. The Impact of Coherent Synchrotron Radiation on the Beam Transport of Short Bunches. PAC 1999, 1: 118-1233. Braun H et al . CLIC Note, 1999, 3894. Braun H H et al . Phys. Rev. Special Topics, 2000, 3: 1244025. Nodvick J S, Saxon D S. Phys. Rev. , 1956, 96: 180-1846. Saldin E L, Schneidmiller E A, Yurkov M V. On the Coherent Radiation of an Electron Bunch Moving in an Arc of a Circle, DESY Print,TESLA-FEL, 1996, 96-147. Murphy J B, Krinsky S, Gluckstern R L. Part . Accel. , 1997, 57: 98. Kheifets S A, Zott er B. CERN Report No. CERN-SL 1995, 95 -3(AP)9. Dohlus M, Kabel A, Limberg T. Uncorrelated Emittance Growth in theTTF-FEL Bunch Compression Sections Due to Coherent Synchrotron Radiation and Space Charge Effects, Proceedings of the 6th European Parti cle Accelerator Conference, 199810. Kabel A. SLAC-PUB-9352, 200211. Carlsten Bruce E. Phys. Rev. , 1996, E56( 1) : 838-84512. Bruce E. Carlsten, Tor O. Phys. Rev. , 1995, E51(2) : 1453-147013. BraunH H et al. Recent Experiments on the Effect of Coherent Synchro..tron Radiation on the Electron Beam of CTF Ⅱ. Proceedings of the 2001 Particle Accelerator Conference, Chicago14. Garr G L et al. Nature, 420: 153-15615. Abo-BakrM, Feikes J et al. Phys. Rev. Lett. , 2002, 88

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XIANG Dao, HUANG Wen-Hui and HE Xiao-Zhong. Impact of Coherent Synchrotron Radiation on Beam Qualities in a Chicane[J]. Chinese Physics C, 2004, 28(5): 555-559.

XIANG Dao, HUANG Wen-Hui and HE Xiao-Zhong. Impact of Coherent Synchrotron Radiation on Beam Qualities in a Chicane[J]. Chinese Physics C, 2004, 28(5): 555-559. shu

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Received: 2003-09-22
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Impact of Coherent Synchrotron Radiation on Beam Qualities in a Chicane

Corresponding author: XIANG Dao,

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

Received Date: 2003-09-22

Accepted Date: 1900-01-01

Available Online: 2004-05-05

Abstract: When the bunch goes through a chicane, the energy will be redistributed within the bunch due to CSR (coherent synchrotron radiation), which would cause nonlinearity. Present theory states that this nonlinearity would add a huge amount to emittance growth. Based on simulation results, this paper would point out that the theory is only valid under an ideal condition that the bunch initially has no nonlinerity and under some given parameters there could be a cancellation between the nonlinearity caused by CSR and the initial nonlinearity. So under these circumstances we can expect CSR to improve the beam quality. This paper provides a brief information about CSR and a full estimation of effects of CSR on beam qualities.

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