A PROPOSAL FOR THE MEASUREMENT OF THE REAL EMITTANCE OF THE BEAM IN CYCLIC ACCELERATORS

XU Jian-Ming; LIU Shi-Yao

Chinese Physics C> 1983, Vol. 7> Issue(2) : 178-185

A PROPOSAL FOR THE MEASUREMENT OF THE REAL EMITTANCE OF THE BEAM IN CYCLIC ACCELERATORS

XU Jian-Ming ^, ,
LIU Shi-Yao

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Abstract：
In this paper, the envelope of numatched beam in the periodic focusing system is analyzed and the expression of beam cross section is given. We find that, by using the commonly used methods, we can't get the real emittance of the beam in the ring accelerators, but can only get the acceptance of the accelerator corresponding to the maximum aperature filled by the beam.
In this paper, we propose to measure the beam envelope by a thin plastic scintillation filament. And from the measured data we can get the real emittance of the beam. At the same time, we can get the tune values, the coherent oscillation amplitude and its frequency and the closed orbit distortion.

References

[1]

Schonauer, A., Beamscope-A novel device for measuring emittances and betatron amplitude distributions, CERN/PS/BR 79-8.[2] Antoniou,E., On a data reduction method for emittance measurement using the targets in the CERN PS booster rings. PS/BR Note/77-29.[3] 徐建铭，用三靶测定发散度椭圆的方法的分析，粒子加速器及其应用(科学技术文献出版社重庆分社，1980), 133页.[4] Bovet, C., Placei, A., Rabany, M., The instrumentation of the secondary beams at the CERN SPS, CERN-SPS-EBP/CB/CP 1977.

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XU Jian-Ming and LIU Shi-Yao. A PROPOSAL FOR THE MEASUREMENT OF THE REAL EMITTANCE OF THE BEAM IN CYCLIC ACCELERATORS[J]. Chinese Physics C, 1983, 7(2): 178-185.

XU Jian-Ming and LIU Shi-Yao. A PROPOSAL FOR THE MEASUREMENT OF THE REAL EMITTANCE OF THE BEAM IN CYCLIC ACCELERATORS[J]. Chinese Physics C, 1983, 7(2): 178-185. shu

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Received: 1900-01-01
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

A PROPOSAL FOR THE MEASUREMENT OF THE REAL EMITTANCE OF THE BEAM IN CYCLIC ACCELERATORS

XU Jian-Ming ^,
LIU Shi-Yao

Corresponding author: XU Jian-Ming,

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1983-04-05

Abstract: In this paper, the envelope of numatched beam in the periodic focusing system is analyzed and the expression of beam cross section is given. We find that, by using the commonly used methods, we can't get the real emittance of the beam in the ring accelerators, but can only get the acceptance of the accelerator corresponding to the maximum aperature filled by the beam.
In this paper, we propose to measure the beam envelope by a thin plastic scintillation filament. And from the measured data we can get the real emittance of the beam. At the same time, we can get the tune values, the coherent oscillation amplitude and its frequency and the closed orbit distortion.