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Injections Options for 12 GEV CEBAF Upgrade.

DE2005840296

Publication Date	2005
Personal Author	Kazimi, R.; Benesch, J. F.; Chao, Y.; Grames, J. M.; Krafft, G. A.; Tiefenback, M.
Page Count	8
Abstract	Jefferson Lab is planning a major upgrade of CEBAF accelerator from 6 to 12 GeV. The injection energy needs to be increased accordingly from 67 MeV to 123 MeV. While the present 100 keV electron gun and beam formation up to 5 MeV would remain unchanged, the accelerating SRF modules in the current injector cannot provide the desired energy increase. Two options for attaining the energy increase have been considered: (1) replacing the present injector SRF modules with new, higher gradient modules, or (2) re-circulating the electron beam through the existing cryomodules to achieve the necessary energy gain in two passes. In this paper we present computer simulation studies for these two options of the injector upgrade and list their advantages and disadvantages.
Keywords	CEBAF accelerator Upgrading Computerized simulation Electron beams Electron guns Planning
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Jefferson Lab., Newport News, VA. Theory Group.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200604

Injections Options for 12 GEV CEBAF Upgrade.

Injections Options for 12 GEV CEBAF Upgrade.
DE2005840296

Publication Date	2005
Personal Author	Kazimi, R.; Benesch, J. F.; Chao, Y.; Grames, J. M.; Krafft, G. A.; Tiefenback, M.
Page Count	8
Abstract	Jefferson Lab is planning a major upgrade of CEBAF accelerator from 6 to 12 GeV. The injection energy needs to be increased accordingly from 67 MeV to 123 MeV. While the present 100 keV electron gun and beam formation up to 5 MeV would remain unchanged, the accelerating SRF modules in the current injector cannot provide the desired energy increase. Two options for attaining the energy increase have been considered: (1) replacing the present injector SRF modules with new, higher gradient modules, or (2) re-circulating the electron beam through the existing cryomodules to achieve the necessary energy gain in two passes. In this paper we present computer simulation studies for these two options of the injector upgrade and list their advantages and disadvantages.
Keywords	CEBAF accelerator Upgrading Computerized simulation Electron beams Electron guns Planning
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Jefferson Lab., Newport News, VA. Theory Group.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200604