PAC2013 - List of Authors (Sabbagh, P.)

Paper	Title	Page
MOPMA04	Design Considerations for the ESS Accelerator-to-Target Region	300
	T.J. Shea, K.H. Andersen, P. Bentley, P.F. Henry, E.J. Pitcher, P. Sabbagh, A. Takibayev ESS, Lund, Sweden A.I.S. Holm, S.P. Møller, H.D. Thomsen ISA, Aarhus, Denmark
	When the European Spallation Source (ESS) is completed in Lund, Sweden, a superconducting linac will deliver a 5 MW proton beam to a rotating tungsten target. Moderated neutrons from this target will be delivered to a suite of 22 neutron instruments. In the accelerator-to-target region, design choices must balance the demands of the accelerator, the target, and the neutron instruments. For example, the transport line upstream of the target station expands and shapes the small, low emittance linac beam into a large beam that is safe for the target components. It must do this with low loss in order to reduce activation of the beam line and minimize a potential source of background in the neutron instruments. To meet availability goals, beam-induced damage to critical components must be avoided by instrumenting beamline components, deploying a suite of beam instrumentation within the target monolith, and interfacing some of these devices to the machine protection system. This paper will describe recent design changes in this region, highlighting considerations that are applicable to most high power facilities and also those that are unique to a long-pulse source like the ESS.

Paper

Title

Page

Design Considerations for the ESS Accelerator-to-Target Region

300

T.J. Shea, K.H. Andersen, P. Bentley, P.F. Henry, E.J. Pitcher, P. Sabbagh, A. Takibayev
ESS, Lund, Sweden
A.I.S. Holm, S.P. Møller, H.D. Thomsen
ISA, Aarhus, Denmark

When the European Spallation Source (ESS) is completed in Lund, Sweden, a superconducting linac will deliver a 5 MW proton beam to a rotating tungsten target. Moderated neutrons from this target will be delivered to a suite of 22 neutron instruments. In the accelerator-to-target region, design choices must balance the demands of the accelerator, the target, and the neutron instruments. For example, the transport line upstream of the target station expands and shapes the small, low emittance linac beam into a large beam that is safe for the target components. It must do this with low loss in order to reduce activation of the beam line and minimize a potential source of background in the neutron instruments. To meet availability goals, beam-induced damage to critical components must be avoided by instrumenting beamline components, deploying a suite of beam instrumentation within the target monolith, and interfacing some of these devices to the machine protection system. This paper will describe recent design changes in this region, highlighting considerations that are applicable to most high power facilities and also those that are unique to a long-pulse source like the ESS.