Design Studies of a Photocathode RF Gun for Short-Wavelength FELs

ZHAO Qiang; LI Yong-Gui

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《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 2001, Vol. 25> Issue(7) : 696-700

Design Studies of a Photocathode RF Gun for Short-Wavelength FELs

ZHAO Qiang ^, ,
LI Yong-Gui

Institute of High Energy Physics, The Chinese Academy Sciences, Beijing 100080, China

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Abstract：
Low emittance and high intensity electron beams are needed for the high gain, short wavelength FELs. To meet the requirements of the proposed DUV FEL facility in Shanghai, we designed a 1.5-cell, S-band photocathode RF gun using the emittance compensation techniques. Based on the simulation codes of POISSON, SUPERFISH and PARMELA, this design aims at producing a beam of ε_n,rms=2.3π·mm·mrad, Q=2nC/bunch, E_k=4.8 MeV at the gun exit with the field gradient of 100MV/m on the cathode. In this paper, we present the design considerations and the simulation results.

References

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. Kim K J.Phys.Rev.Lett.,1986,57:18712. Hogan M et al.Phys .Rev.Lett.,1998,80:2893. Batchelor K,Ben-zvi I,Fernow R et al.Proc.of EPAC,1990 .5414. Palmer D ,Wang X ,Miller R et al.Initial Commissioning Results of the Next Generation Photoinjector.In:Chattopadhyay S ,McCullough J and DahlPed .Advanced Accelerator Concepts.New York :AIPP ress,1997.695 5. Carlsten B .Nucl.Instr. Meth .,1989,A285:313 6. Serafini L and Rosenzweig J.Phys.Rev.,1997,E55:7565 7. McDonald K.IEEE Trans.Electron Devices,1988,35:2052 8. Kim K J.Nucl.Instr. Meth.,1989,A275:201 9. Fry A R ,Fitch M J,Melissinos A C et al.Nucl.Instr. Meth .,1999,A430:180

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ZHAO Qiang and LI Yong-Gui. Design Studies of a Photocathode RF Gun for Short-Wavelength FELs[J]. Chinese Physics C, 2001, 25(7): 696-700.

ZHAO Qiang and LI Yong-Gui. Design Studies of a Photocathode RF Gun for Short-Wavelength FELs[J]. Chinese Physics C, 2001, 25(7): 696-700. shu

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Received: 2000-05-16
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

Design Studies of a Photocathode RF Gun for Short-Wavelength FELs

ZHAO Qiang ^,
LI Yong-Gui

Corresponding author: ZHAO Qiang,

Institute of High Energy Physics, The Chinese Academy Sciences, Beijing 100080, China

Received Date: 2000-05-16
Accepted Date: 1900-01-01
Available Online: 2001-07-05

Abstract: Low emittance and high intensity electron beams are needed for the high gain, short wavelength FELs. To meet the requirements of the proposed DUV FEL facility in Shanghai, we designed a 1.5-cell, S-band photocathode RF gun using the emittance compensation techniques. Based on the simulation codes of POISSON, SUPERFISH and PARMELA, this design aims at producing a beam of ε_n,rms=2.3π·mm·mrad, Q=2nC/bunch, E_k=4.8 MeV at the gun exit with the field gradient of 100MV/m on the cathode. In this paper, we present the design considerations and the simulation results.