SAP2014 - List of Authors (Jiang, P.)

Paper	Title	Page
WEPH09	Concept Design of the Collimation System in the CSRm	44
	P. Li, Z. Chai, P. Jiang, J. Meng, J.C. Yang, Y.J. Yuan, W.H. Zheng IMP, Lanzhou, People's Republic of China
	Funding: National Natural Science Foundation of China (Projects No. 11305227). The heavy ion beams would be easily lost at the vacuum chamber along the CSRm when it is used to accumulate the intermediate charge state particles. The vacuum pressure bump due to the ion-induced desorption in turn leads to an increase in beam loss rate. In order to avoid the complete beam loss, the collimation system is investigated in the CSRm. The beam loss distribution is simulated considering the particle charge exchanged process. Then the collimation efficiency of the lost particle is calculated and optimized under different collimator's position, geometry, and beam emittance and so on. Furthermore, the closed orbit distortion which is caused by different types of error in the ring will affect the collimation efficiency. The collimation efficiency of the lost particles in the CSRm is investigated by taking real magnet alignment errors into consideration. Two prototype collimators are under designing and will be tested in the CSRm.

WEPH35	APF DTL Design Besed on iMpAPF	90
	P. Jiang, C. Li, P. Li, Z.J. Wang, Y.J. Yuan IMP, Lanzhou, People's Republic of China
	Alternative phase focusing (APF) DTL has advantages in price and space. However, the designing of APF is difficult because of the jumping phases. In order to design and simulate a proper APF, a code iMpAPF(i Multi-particle APF) has been developed. RK4 is introduced in this code for calculation, and the soul of the code is smoothness. Theoretically, the particle tracing figures out that the theoretic phase advance ratio between longitudinal direction and transversal direction is close to 2. Based on this code, a C⁵⁺, 200 MHz, medium energy APF as a linear injector of a synchrotron used for cancer therapy has been designed. This paper focuses on the development of iMpAPF, and also several results obtained from the code are shown.

Paper

Title

Page

Concept Design of the Collimation System in the CSRm

44

P. Li, Z. Chai, P. Jiang, J. Meng, J.C. Yang, Y.J. Yuan, W.H. Zheng
IMP, Lanzhou, People's Republic of China

Funding: National Natural Science Foundation of China (Projects No. 11305227).
The heavy ion beams would be easily lost at the vacuum chamber along the CSRm when it is used to accumulate the intermediate charge state particles. The vacuum pressure bump due to the ion-induced desorption in turn leads to an increase in beam loss rate. In order to avoid the complete beam loss, the collimation system is investigated in the CSRm. The beam loss distribution is simulated considering the particle charge exchanged process. Then the collimation efficiency of the lost particle is calculated and optimized under different collimator's position, geometry, and beam emittance and so on. Furthermore, the closed orbit distortion which is caused by different types of error in the ring will affect the collimation efficiency. The collimation efficiency of the lost particles in the CSRm is investigated by taking real magnet alignment errors into consideration. Two prototype collimators are under designing and will be tested in the CSRm.

WEPH35

APF DTL Design Besed on iMpAPF

90

P. Jiang, C. Li, P. Li, Z.J. Wang, Y.J. Yuan
IMP, Lanzhou, People's Republic of China

Alternative phase focusing (APF) DTL has advantages in price and space. However, the designing of APF is difficult because of the jumping phases. In order to design and simulate a proper APF, a code iMpAPF(i Multi-particle APF) has been developed. RK4 is introduced in this code for calculation, and the soul of the code is smoothness. Theoretically, the particle tracing figures out that the theoretic phase advance ratio between longitudinal direction and transversal direction is close to 2. Based on this code, a C⁵⁺, 200 MHz, medium energy APF as a linear injector of a synchrotron used for cancer therapy has been designed. This paper focuses on the development of iMpAPF, and also several results obtained from the code are shown.