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Simulation of a Positron Source for CEBAF.

DE2008921648

Publication Date	2007
Personal Author	Golge, G.; Freyberger, A.; Hyde-Wright, C.
Page Count	3
Abstract	A positron source for the 6 GeV (or the proposed 12 GeV upgrade) recirculating linacs at Jefferson Lab is presented. The proposed 100nA CW positron source has several unique characteristics; high incident beam power (100kW), 10 MeV incident electron beam energy, CW incident beam and CW production. Positron production with 10 MeV electrons has several advantages; the energy is below neutron threshold so the production target will not become activated during use and the absolute energy spread is bounded by the low incident energy. These advantages are offset by the large angular distribution of the outgoing positrons. Results of simulations of the positron production, capture, acceleration and injection into the recirculating linac are presented. Energy flow and thermal management of the production target present a challenge and are included in the simulations.
Keywords	Positron sources CEBAF accelerators Angular distribution Acceleration Electron beams Electrons Linear accelerators Neutrons Production Simulation Targets
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Thomas Jefferson National Accelerator Facility, Newport News, VA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200815
Contract Number	AC05-06OR23177

Simulation of a Positron Source for CEBAF.

Simulation of a Positron Source for CEBAF.
DE2008921648

Publication Date	2007
Personal Author	Golge, G.; Freyberger, A.; Hyde-Wright, C.
Page Count	3
Abstract	A positron source for the 6 GeV (or the proposed 12 GeV upgrade) recirculating linacs at Jefferson Lab is presented. The proposed 100nA CW positron source has several unique characteristics; high incident beam power (100kW), 10 MeV incident electron beam energy, CW incident beam and CW production. Positron production with 10 MeV electrons has several advantages; the energy is below neutron threshold so the production target will not become activated during use and the absolute energy spread is bounded by the low incident energy. These advantages are offset by the large angular distribution of the outgoing positrons. Results of simulations of the positron production, capture, acceleration and injection into the recirculating linac are presented. Energy flow and thermal management of the production target present a challenge and are included in the simulations.
Keywords	Positron sources CEBAF accelerators Angular distribution Acceleration Electron beams Electrons Linear accelerators Neutrons Production Simulation Targets
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Thomas Jefferson National Accelerator Facility, Newport News, VA.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200815
Contract Number	AC05-06OR23177