Title :
TMRS MK III engineering design
Author :
O´Toole, J.A. ; Valicenti, R.A. ; Woloshun, K.A.
Author_Institution :
Los Alamos Nat. Lab., Los Alamos, NM, USA
fDate :
Oct. 24 2009-Nov. 1 2009
Abstract :
Background: The Target-Moderator-Reflector System (TMRS) is the neutron source for nuclear physics experiments in the Lujan Neutron Scattering Center user facility. The TMRS is an assembly consisting of tungsten targets plus a network of moderators, reflectors and flight paths that deliver neutrons of specified energies and fluxes to surrounding experiments and detector stations. The second-generation TMRS (MK II), operational for 5 years, is scheduled for replacement in 2010. While many features of MK II will remain unchanged this paper describes the engineering design of important new features: (1) The tungsten components of the targets will be clad in tantalum to minimize erosion and consequent contamination of the water cooling system, and (2) A new liquid hydrogen moderator with a beryllium reflector/filter that doubles the neutron flux.
Keywords :
neutron flux; neutron moderation; neutron sources; nuclear engineering computing; TMRS; beryllium reflector; liquid hydrogen moderator; neutron flux; neutron source; target-moderator-reflector system MK III engineering design; tungsten components; tungsten targets; water cooling system; Aerospace engineering; Assembly; Contamination; Cooling; Design engineering; Detectors; Neutron spin echo; Nuclear physics; Tungsten; Water pollution;
Conference_Titel :
Nuclear Science Symposium Conference Record (NSS/MIC), 2009 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-3961-4
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2009.5401768
