Mismatch study of C-ADS main linac

MENG Cai; TANG Jing-Yu; PEI Shi-Lun; YAN Fang

doi:10.1088/1674-1137/39/9/097002

Chinese Physics C> 2015, Vol. 39> Issue(9) : 097002 DOI: 10.1088/1674-1137/39/9/097002

Mismatch study of C-ADS main linac

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Abstract：
The ADS accelerator in China is a Continuous-Wave (CW) proton linac with 1.5 GeV beam energy, 10 mA beam current, and 15 MW beam power. To meet the extremely low beam loss rate and high reliability requirements, it is very important to study the beam halo caused by beam mismatch, which is one major sources of beam loss. To avoid envelope instability, the phase advances per period are all smaller than 90 degrees in the main linac design. In this paper, simulation results of the emittance growth and the envelope oscillations caused by mismatch in the main linac section are presented. To meet the emittance growth requirement, the transverse and longitudinal mismatch factors should be smaller than 0.4 and 0.3, respectively.

References

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LI Z H, CHENG P, GENG H P et al. Phys. Rev. ST Accel. Beams, 2013, 16: 080101[2] MENG C, LI Z H, TANG J Y et al. Error Analysis and Beam Loss Control in the C-ADS Main Linac. In: Proceedings of IPAC2013. Shanghai, 2013. 3866-3868[3] Reiser M. Theory and Design of Charged Particle Beams. New York: John Wiley Sons. Inc., 1994. 240-250[4] TANG J Y. Nuclear Instruments and Methods in Physics Research A, 2008, 595: 561-567[5] Pabst M, Bongardt K. FZJ et al. Progress on Intense Proton Beam Dynamics and Halo Formation. In: Proceedings of 6th European Particle Accelerator Conference. Sweden: 1998. 146[6] Gerigk F. Space Charge and Beam Halos in Proton Linacs. In: Proceedings of Joint US-CERN-JAPAN-RUSSIA Particle Accelerator School. California: 2002

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MENG Cai, TANG Jing-Yu, PEI Shi-Lun and YAN Fang. Mismatch study of C-ADS main linac[J]. Chinese Physics C, 2015, 39(9): 097002. doi: 10.1088/1674-1137/39/9/097002

MENG Cai, TANG Jing-Yu, PEI Shi-Lun and YAN Fang. Mismatch study of C-ADS main linac[J]. Chinese Physics C, 2015, 39(9): 097002. doi: 10.1088/1674-1137/39/9/097002 shu

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Received: 2014-12-01
Revised: 2015-03-27

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沈阳化工大学材料科学与工程学院沈阳 110142

Mismatch study of C-ADS main linac

Corresponding author: MENG Cai,

Received Date: 2014-12-01
Accepted Date: 2015-03-27
Available Online: 2015-09-05

Abstract: The ADS accelerator in China is a Continuous-Wave (CW) proton linac with 1.5 GeV beam energy, 10 mA beam current, and 15 MW beam power. To meet the extremely low beam loss rate and high reliability requirements, it is very important to study the beam halo caused by beam mismatch, which is one major sources of beam loss. To avoid envelope instability, the phase advances per period are all smaller than 90 degrees in the main linac design. In this paper, simulation results of the emittance growth and the envelope oscillations caused by mismatch in the main linac section are presented. To meet the emittance growth requirement, the transverse and longitudinal mismatch factors should be smaller than 0.4 and 0.3, respectively.