Design optimization of the APF DTL in the SSC-linac

WANG Zhi-Jun; HE Yuan; WU Wei; YANG Ya-Qing; XIAO Chen

doi:10.1088/1674-1137/34/10/017

Chinese Physics C> 2010, Vol. 34> Issue(10) : 1639-1642 DOI: 10.1088/1674-1137/34/10/017

Design optimization of the APF DTL in the SSC-linac

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Abstract：
A linear accelerator as a new injector for the SSC (Separated Sector Cyclotron) of the HIRFL (Heavy Ion Research Facility Lanzhou) is being designed. The DTL (Drift-Tube-Linac) has been designed to accelerate ²³⁸U³⁴⁺ from 0.140 MeV/u to 0.97 MeV/u. To the first accelerating tank which accelerates ²³⁸U³⁴⁺ to 0.54 MeV/u, the approach of Alternating-Phase-Focusing (APF) is applied. The phase array is obtained by coupling optimization software Dakota and beam optics code LINREV. With the hybrid of Multi-objective Genetic Algorithm (MOGA) and a pattern search method, an optimum array of asynchronous phases is determined. The final growth, both transversely and longitudinally, can meet the design requirements. In this paper, the deign optimization of the APF DTL is presented.

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WANG Zhi-Jun, HE Yuan, WU Wei, YANG Ya-Qing and XIAO Chen. Design optimization of the APF DTL in the SSC-linac[J]. Chinese Physics C, 2010, 34(10): 1639-1642. doi: 10.1088/1674-1137/34/10/017

WANG Zhi-Jun, HE Yuan, WU Wei, YANG Ya-Qing and XIAO Chen. Design optimization of the APF DTL in the SSC-linac[J]. Chinese Physics C, 2010, 34(10): 1639-1642. doi: 10.1088/1674-1137/34/10/017 shu

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Received: 2009-12-08
Revised: 2010-01-07

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沈阳化工大学材料科学与工程学院沈阳 110142

Design optimization of the APF DTL in the SSC-linac

Corresponding author: WANG Zhi-Jun,

Received Date: 2009-12-08
Accepted Date: 2010-01-07
Available Online: 2010-10-05

Abstract:

A linear accelerator as a new injector for the SSC (Separated Sector Cyclotron) of the HIRFL (Heavy Ion Research Facility Lanzhou) is being designed. The DTL (Drift-Tube-Linac) has been designed to accelerate ²³⁸U³⁴⁺ from 0.140 MeV/u to 0.97 MeV/u. To the first accelerating tank which accelerates ²³⁸U³⁴⁺ to 0.54 MeV/u, the approach of Alternating-Phase-Focusing (APF) is applied. The phase array is obtained by coupling optimization software Dakota and beam optics code LINREV. With the hybrid of Multi-objective Genetic Algorithm (MOGA) and a pattern search method, an optimum array of asynchronous phases is determined. The final growth, both transversely and longitudinally, can meet the design requirements. In this paper, the deign optimization of the APF DTL is presented.