SRF2011 - List of Authors (Stout, D.)

Paper	Title	Page
MOPO058	Analysis of Beam Damage to FRIB Driver Linac	236
	Y. Zhang, D. Stout, J. Wei FRIB, East Lansing, Michigan, USA
	Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661. Component damage caused by particle beam is an important issue in the design of a high power accelerator, particularly a superconducting linac. The FRIB driver linac must deliver a beam on target of approximately 1 mm in diameter, increasing beam energy density significantly compared to other SRF linacs. Because dE/dx of heavy ion beam is several ten times larger than proton or electron beam, the situation is more severe: at full power, 400 kW, a uranium beam may cause accelerator structure damage in less than 40 μs. A fast response machine protection system is necessary, in additional to special protection design, very careful linac beam tuning and operation. In this paper, temperature rise of niobium and stainless steel at different beam incident angles are compared, and thermal stress analyzed for nominal FRIB beam at different energy. Protection designs are also briefly discussed.

Paper

Title

Page

Analysis of Beam Damage to FRIB Driver Linac

236

Y. Zhang, D. Stout, J. Wei
FRIB, East Lansing, Michigan, USA

Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661.
Component damage caused by particle beam is an important issue in the design of a high power accelerator, particularly a superconducting linac. The FRIB driver linac must deliver a beam on target of approximately 1 mm in diameter, increasing beam energy density significantly compared to other SRF linacs. Because dE/dx of heavy ion beam is several ten times larger than proton or electron beam, the situation is more severe: at full power, 400 kW, a uranium beam may cause accelerator structure damage in less than 40 μs. A fast response machine protection system is necessary, in additional to special protection design, very careful linac beam tuning and operation. In this paper, temperature rise of niobium and stainless steel at different beam incident angles are compared, and thermal stress analyzed for nominal FRIB beam at different energy. Protection designs are also briefly discussed.