An accelerator scenario for a hard X-ray free electron laser combined with high energy electron radiography
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摘要
In order to study the dynamic response of the material and the physical mechanism of fluid dynamics,an accelerator scenario which can be applied to both hard X-ray free electron laser and high energy electron radiography is proposed.This accelerator is mainly composed of a 12 GeV linac,an undulator branch and an eRad beamline.In order to characterize a sample's dynamic behavior in situ and real-time with XFEL and eRad simultaneously,the linac should be capable of accelerating the two kinds of beam within the same operation mode.Combining in-vacuum and tapering techniques,the undulator branch can produce more than 1011 photons per pulse in 0.1%bandwidth at42 keV.Finally,an eRad amplifying beamline with 1:10 ratio is proposed as an important complementary tool for the wider view field and density identification ability.
In order to study the dynamic response of the material and the physical mechanism of fluid dynamics,an accelerator scenario which can be applied to both hard X-ray free electron laser and high energy electron radiography is proposed.This accelerator is mainly composed of a 12 GeV linac,an undulator branch and an eRad beamline.In order to characterize a sample's dynamic behavior in situ and real-time with XFEL and eRad simultaneously,the linac should be capable of accelerating the two kinds of beam within the same operation mode.Combining in-vacuum and tapering techniques,the undulator branch can produce more than 1011 photons per pulse in 0.1%bandwidth at42 keV.Finally,an eRad amplifying beamline with 1:10 ratio is proposed as an important complementary tool for the wider view field and density identification ability.
In order to study the dynamic response of the material and the physical mechanism of fluid dynamics,an accelerator scenario which can be applied to both hard X-ray free electron laser and high energy electron radiography is proposed.This accelerator is mainly composed of a 12 GeV linac,an undulator branch and an eRad beamline.In order to characterize a sample's dynamic behavior in situ and real-time with XFEL and eRad simultaneously,the linac should be capable of accelerating the two kinds of beam within the same operation mode.Combining in-vacuum and tapering techniques,the undulator branch can produce more than 1011 photons per pulse in 0.1%bandwidth at42 keV.Finally,an eRad amplifying beamline with 1:10 ratio is proposed as an important complementary tool for the wider view field and density identification ability.
引文
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6 Michael Borland,User's manual for elegant,http://www.aps.anl.gov/Accelerator_Systems_Division/Accelerator_Operations-Physics/manuals/elegant-latest/elegant.pdf
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12 S.Agostinelli,J.Allison,K.Amako et al,Nuclear Instruments and Methods in Physics Research A,2003,506:250-303
2 C L Morris,E.Abies,K.R.Alrick et al,Journal of Applied Physics,2011,109:104905
3 C L Morris,N.S.P king,K.Kwiatkowski et al,Reports on Progress in Physics,2013,76:046301
4 Prank Merrill,Prank Harmon,Alan Hunt et al,Nuclear Instruments and Methods in Physics Research B,2007,261:382-386
5 Richard Neutze,Phil.Trans.R.Soc.B,2014,369:20130318
6 Michael Borland,User's manual for elegant,http://www.aps.anl.gov/Accelerator_Systems_Division/Accelerator_Operations-Physics/manuals/elegant-latest/elegant.pdf
7 R.Li,Nuclear Instruments and Methods in Physics Research A,1999,429:310-314
8 K.Bane,Y.Ding,P.Emma et al,Measurements of Compression and Emittance Growth after the First LCLS Bunch Compressor Chicane,in Proceedings of PAC07(New Mexico,USA)
9 T.Tanaka,T.Hara,R.Tsuru et al,In-vacuum Undulators,in Proceedings of the 27~(th)international free electron laser conference(California,USA,2005)
10 S.Reiche,Update on the FEL Code Genesisl.3,in Proceedings of FEL2014(Basel,Switzerland)
11 Wei Tao,Yang Guojun,Long Jidong et al,Chinese Physics C,2013,37(6):068201
12 S.Agostinelli,J.Allison,K.Amako et al,Nuclear Instruments and Methods in Physics Research A,2003,506:250-303