Time-Resolved Emittance Measurement of Intense Pulse Beams Using the Modified Three Gradient Method

YANG Guo-Jun; ZHANG Zhuo; CHEN Si-Fu; LIU Cheng-Jun; LIN Yu-Zheng

Chinese Physics C> 2005, Vol. 29> Issue(2) : 191-196

Time-Resolved Emittance Measurement of Intense Pulse Beams Using the Modified Three Gradient Method

Department of Engineering Physics,Tsinghua University,Beijing 100084,China2 Institute of Fluid Physics,CAEP,Mianyang 621900,China

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Abstract：
The three gradient method is a conventional means for beam emittance measurement. In intense electron beam accelerators,since the space charge effect is remarkable, the conventional three gradient method in not available.A MTGM(abbreviation for the Modified Three Gradient Method)is an improvement of the conventional three gradient method, the space charge effect is included in this method. In this paper, the basic theory of MTGM is stated, the principle of applying the MTGM method to beam diagnostics is described. Experiments are carried out on two electron beams of 3.5MeV, 2.6kA, 100ns and 18MeV,2.6kA 100ns separately, which scheme is presented. Results of these experiments are presented together with the error analysis. The results show that the MTGM method is an effective way of emittance measurement for intense pulse electron beam.

References

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YANG Guo-Jun, ZHANG Zhuo, CHEN Si-Fu, LIU Cheng-Jun and LIN Yu-Zheng. Time-Resolved Emittance Measurement of Intense Pulse Beams Using the Modified Three Gradient Method[J]. Chinese Physics C, 2005, 29(2): 191-196.

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Received: 2004-06-16
Revised: 2004-07-26

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沈阳化工大学材料科学与工程学院沈阳 110142

Time-Resolved Emittance Measurement of Intense Pulse Beams Using the Modified Three Gradient Method

Corresponding author: YANG Guo-Jun,

Department of Engineering Physics,Tsinghua University,Beijing 100084,China2 Institute of Fluid Physics,CAEP,Mianyang 621900,China

Received Date: 2004-06-16

Accepted Date: 2004-07-26

Available Online: 2005-02-05

Abstract: The three gradient method is a conventional means for beam emittance measurement. In intense electron beam accelerators,since the space charge effect is remarkable, the conventional three gradient method in not available.A MTGM(abbreviation for the Modified Three Gradient Method)is an improvement of the conventional three gradient method, the space charge effect is included in this method. In this paper, the basic theory of MTGM is stated, the principle of applying the MTGM method to beam diagnostics is described. Experiments are carried out on two electron beams of 3.5MeV, 2.6kA, 100ns and 18MeV,2.6kA 100ns separately, which scheme is presented. Results of these experiments are presented together with the error analysis. The results show that the MTGM method is an effective way of emittance measurement for intense pulse electron beam.

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Time-Resolved Emittance Measurement of Intense Pulse Beams Using the Modified Three Gradient Method

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