PAC2013 - List of Authors (Letchford, A.P.)

Paper	Title	Page
MOPMA05	Thermal Design of the FETS Chopper Beam Dump	303
	P. Savage, M. Aslaninejad, P.A. Posocco, J.K. Pozimski Imperial College of Science and Technology, Department of Physics, London, United Kingdom A.P. Letchford, J.K. Pozimski STFC/RAL, Chilton, Didcot, Oxon, United Kingdom S. Mishra Imperial College of Science and Technology, London, United Kingdom
	Funding: M. Shruti was supported by STFC/RAL. The Front End Test Stand Project (FETS) at RAL is being built to demonstrate fast beam chopping. This is required to create precisely defined gaps in the bunched H⁻ beam which is essential in order to minimise beam losses in a synchrotron during injection. The gaps are created in the Medium Energy Beam Transport (MEBT) section of the FETS beam-line using a ‘fast-slow’ chopping scheme. This scheme uses two choppers, one fast and one slow, each kicks a portion of beam into its corresponding downstream beam dump. The challenge for the beam dump design is that it must occupy a limited longitudinal space to ensure that the beam transport is preserved and must absorb a beam power that is close to the sustainable stress limit of common engineering materials. This paper will describe the simulations made to study the cooling scheme required to absorb the power deposited in the dump plates for the fast and slow choppers.

Paper

Title

Page

Thermal Design of the FETS Chopper Beam Dump

303

P. Savage, M. Aslaninejad, P.A. Posocco, J.K. Pozimski
Imperial College of Science and Technology, Department of Physics, London, United Kingdom
A.P. Letchford, J.K. Pozimski
STFC/RAL, Chilton, Didcot, Oxon, United Kingdom
S. Mishra
Imperial College of Science and Technology, London, United Kingdom

Funding: M. Shruti was supported by STFC/RAL.
The Front End Test Stand Project (FETS) at RAL is being built to demonstrate fast beam chopping. This is required to create precisely defined gaps in the bunched H⁻ beam which is essential in order to minimise beam losses in a synchrotron during injection. The gaps are created in the Medium Energy Beam Transport (MEBT) section of the FETS beam-line using a ‘fast-slow’ chopping scheme. This scheme uses two choppers, one fast and one slow, each kicks a portion of beam into its corresponding downstream beam dump. The challenge for the beam dump design is that it must occupy a limited longitudinal space to ensure that the beam transport is preserved and must absorb a beam power that is close to the sustainable stress limit of common engineering materials. This paper will describe the simulations made to study the cooling scheme required to absorb the power deposited in the dump plates for the fast and slow choppers.