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Sub-picosecond electron bunch length measurement using coherent transition radiation at SXFEL

【摘要】Longitudinalelectronbunchlengthplaysasignificantroleinsingle-passfree-electronlasers(FEL),asthehigh-gainFELprocessdependsstronglyonthehighpeakcurrentofelectronbunches.LongitudinalelectronbunchlengthwasmeasuredbydetectingtheinterferogramofcoherenttransitionradiationgeneratedbyelectronbunchesusingaTHzinterferometerandaGolaycell(spectralrange0.02–20THz)atShanghaiX-rayfree-electronlaser.Thedetailedprocessofmeasurementanddataanalysisarediscussedherein.Furthermore,theelectronbunchlengthwasestimatedbasedonthedispersivestrengthR56ofthebunchcompressorandtheenergyspreaddofelectronbunches,whichwereobtainedviaexperiments.Thecomparisonshowedthatthemeasuredbunchlengthwasconsistentwiththeestimatedbunchlength.

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36 共6页 核技术:英文版 2018年5期 免费 中文科技期刊数据库

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