Simulation of beam gas coulomb scattering in HALS

YU Lu-Xin; GAO Wei-Wei; WANG Lin; LI Wei-Min

doi:10.1088/1674-1137/39/2/027004

Chinese Physics C> 2015, Vol. 39> Issue(2) : 027004 DOI: 10.1088/1674-1137/39/2/027004

Simulation of beam gas coulomb scattering in HALS

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Abstract：
In conventional research on beam gas coulomb scattering (BGCS), only the related beam lifetime using the analytical method is studied. In this paper, using the particle-in-cell Monte Carlo collisions (PIC-MCC) method, we not only simulated the beam lifetime but also explored the effect of BGCS on the beam distribution. In order to better estimate the effect on particle distribution, we study the ultra-low emittance electron beam. Here we choose the HeFei Advanced Light Source. By counting the lost particles in a certain time, the corresponding beam lifetime we simulated is 4.8482 h/13.8492 h in x/y, which is very close to the theoretic value (5.0555 h /13.7024 h in x/y). By counting the lost particles relative to the collided particles, the simulated value of the loss probability of collided particles is 1.3431e-04, which is also very close to the theoretical value (1.3824e-04). Besides, the simulation shows there is a tail in the transverse distribution due to the BGCS. The close match of the simulation with the theoretic value in beam lifetime and loss probability indicates our simulation is reliable.

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YU Lu-Xin, GAO Wei-Wei, WANG Lin and LI Wei-Min. Simulation of beam gas coulomb scattering in HALS[J]. Chinese Physics C, 2015, 39(2): 027004. doi: 10.1088/1674-1137/39/2/027004

YU Lu-Xin, GAO Wei-Wei, WANG Lin and LI Wei-Min. Simulation of beam gas coulomb scattering in HALS[J]. Chinese Physics C, 2015, 39(2): 027004. doi: 10.1088/1674-1137/39/2/027004 shu

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Received: 2014-04-09
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

Simulation of beam gas coulomb scattering in HALS

Corresponding author: YU Lu-Xin,

Corresponding author: GAO Wei-Wei,

Corresponding author: WANG Lin,

Received Date: 2014-04-09
Accepted Date: 1900-01-01
Available Online: 2015-02-05

Abstract: In conventional research on beam gas coulomb scattering (BGCS), only the related beam lifetime using the analytical method is studied. In this paper, using the particle-in-cell Monte Carlo collisions (PIC-MCC) method, we not only simulated the beam lifetime but also explored the effect of BGCS on the beam distribution. In order to better estimate the effect on particle distribution, we study the ultra-low emittance electron beam. Here we choose the HeFei Advanced Light Source. By counting the lost particles in a certain time, the corresponding beam lifetime we simulated is 4.8482 h/13.8492 h in x/y, which is very close to the theoretic value (5.0555 h /13.7024 h in x/y). By counting the lost particles relative to the collided particles, the simulated value of the loss probability of collided particles is 1.3431e-04, which is also very close to the theoretical value (1.3824e-04). Besides, the simulation shows there is a tail in the transverse distribution due to the BGCS. The close match of the simulation with the theoretic value in beam lifetime and loss probability indicates our simulation is reliable.