Error analysis and lattice improvement for the C-ADS Injector-Ⅰ

MENG Cai; LI Zhi-Hui; TANG Jing-Yu

doi:10.1088/1674-1137/38/6/067008

Chinese Physics C> 2014, Vol. 38> Issue(6) : 067008 DOI: 10.1088/1674-1137/38/6/067008

Error analysis and lattice improvement for the C-ADS Injector-Ⅰ

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Abstract：
The injector Scheme-Ⅰ (or Injector-Ⅰ) of the C-ADS linac is a 10 mA 10 MeV proton linac working in CW mode. It is mainly comprised of a 3.2 MeV room-temperature 4-vane RFQ and twelve superconducting single-spoke cavities housed in a long cryostat. Error analysis including alignment and field errors, and static and dynamic ones for the injector are presented. Based on detailed numerical simulations, an orbit correction scheme has been designed, which shows that with correction the rms residual orbit errors can be controlled within 0.3 mm and a beam loss rate of 1.7× 10^-6 is obtained. To reduce the beam loss rate further, an improved lattice design for the superconducting spoke cavity section has been studied.

References

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TANG J Y, LI Z H et al. Conceptual Physics Design on the C-ADS Accelerators. IHEP-CADS-Report/2011-1E[2] Ostroumov P N, Aseev V N, Mustapha B. Physical Review Special Topics-Accelerators and Beams, 2004, 7: 090101[3] Gerigk F et al. Conceptual Design of the SPL II - A High-Power Superconducting H- Linac at CERN, CERN. 2006[4] Jungwirth H. Conceptual Design Report - The Superconducting Injector Linac for the Cooler Synchrotron COSY. Match 2002. 22[5] Aune B et al. Technical Report of ESS - The Linac. Volume III, 2002. 111-114[6] Sato S et al. Proceedings of PAC07, 2007. 4072-4074[7] LI Zhi-Hui, CHENG Peng et al. Physics Design of an Accelerator for an Accelerator-Driven Subcritical System. Physical Review Special Topics-Accelerators and Beams, 2013, 16: 080101

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MENG Cai, LI Zhi-Hui and TANG Jing-Yu. Error analysis and lattice improvement for the C-ADS Injector-Ⅰ[J]. Chinese Physics C, 2014, 38(6): 067008. doi: 10.1088/1674-1137/38/6/067008

MENG Cai, LI Zhi-Hui and TANG Jing-Yu. Error analysis and lattice improvement for the C-ADS Injector-Ⅰ[J]. Chinese Physics C, 2014, 38(6): 067008. doi: 10.1088/1674-1137/38/6/067008 shu

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Received: 2013-07-31
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

Error analysis and lattice improvement for the C-ADS Injector-Ⅰ

Corresponding author: MENG Cai,

Corresponding author: TANG Jing-Yu,

Received Date: 2013-07-31
Accepted Date: 1900-01-01
Available Online: 2014-06-05

Abstract: The injector Scheme-Ⅰ (or Injector-Ⅰ) of the C-ADS linac is a 10 mA 10 MeV proton linac working in CW mode. It is mainly comprised of a 3.2 MeV room-temperature 4-vane RFQ and twelve superconducting single-spoke cavities housed in a long cryostat. Error analysis including alignment and field errors, and static and dynamic ones for the injector are presented. Based on detailed numerical simulations, an orbit correction scheme has been designed, which shows that with correction the rms residual orbit errors can be controlled within 0.3 mm and a beam loss rate of 1.7× 10^-6 is obtained. To reduce the beam loss rate further, an improved lattice design for the superconducting spoke cavity section has been studied.