Mechanism and Control Methods of Emittance Growth for LIA Injector

DAI Zhi-Yong; GUO Zhi-Yuan; ZHANG Lin-Wen

Chinese Physics C> 2004, Vol. 28> Issue(9) : 1002-1006

Mechanism and Control Methods of Emittance Growth for LIA Injector

Institute of High Energy Physics,CAS,Beijing 100039,China2 Institute of Fluid Physics,CAEP,Mianyang 621900,China

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Abstract：
According to characteristics of Linear Induction Accelerator(LIA),the model of cylindrically symmetric DC beams is adopted in this paper.The differential equation of RMS emittance growth is derived.One of the emittance growth mechanism is presented,which assumes that the beam profile will not stop evolving unless it has Gaussian distribution due to non-linearity during beam transportation.Consequently,the emittance growth is calculated from K-V distribution to Gaussian distribution,and the control methods of emittance growth is discussed.

References

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. Lee E P, Cooper R K. Part icle Accelerators, 1976, 7: 83-952. Caporaso. G J. Kiloampere High-Brightness Beams, Lawrence LivermoreLaboratory Rept: UCRL-95319, 19873. Martin Reiser. Theory and Design of Charged Particle Beams. A Wiley..Int erscience Publication JOHN WILEY SONS, INC. ISBN 0..471-30616-9, 19944. Launspach J, Bonnafond C et al. Recent Results on the DARHT andAIRIX 4MV, ±1%, 3. 5kA Electron Beam Injectors, Beams, 19945. Merle E, Bombardier F et al .Progress with the 2-3kA AIRIX Elect ronBeam. EPAC 2002, Paris,France6. Merle E, Delvaux J et al. Transport Opt imizat ion and Characterizat ion ofthe 2kA AIRIX Electron Beam. Linac 2000,Monterey, California7. Burns M J, Carlsten B E et al. Status of the DARHT Phase 2 Long..PulseAccelerator. PAC 2001,Chicago

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DAI Zhi-Yong, GUO Zhi-Yuan and ZHANG Lin-Wen. Mechanism and Control Methods of Emittance Growth for LIA Injector[J]. Chinese Physics C, 2004, 28(9): 1002-1006.

DAI Zhi-Yong, GUO Zhi-Yuan and ZHANG Lin-Wen. Mechanism and Control Methods of Emittance Growth for LIA Injector[J]. Chinese Physics C, 2004, 28(9): 1002-1006. shu

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Received: 2004-02-03
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

Mechanism and Control Methods of Emittance Growth for LIA Injector

Corresponding author: GUO Zhi-Yuan,

Institute of High Energy Physics,CAS,Beijing 100039,China2 Institute of Fluid Physics,CAEP,Mianyang 621900,China

Received Date: 2004-02-03
Accepted Date: 1900-01-01
Available Online: 2004-09-05

Abstract: According to characteristics of Linear Induction Accelerator(LIA),the model of cylindrically symmetric DC beams is adopted in this paper.The differential equation of RMS emittance growth is derived.One of the emittance growth mechanism is presented,which assumes that the beam profile will not stop evolving unless it has Gaussian distribution due to non-linearity during beam transportation.Consequently,the emittance growth is calculated from K-V distribution to Gaussian distribution,and the control methods of emittance growth is discussed.