Journal Article FZJ-2018-00064

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Spectrometers for compact neutron sources

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2018
North-Holland Publ. Co. Amsterdam

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Abstract: We discuss the potential for neutron spectrometers at novel accelerator driven compact neutron sources. Such a High Brilliance Source (HBS) relies on low energy nuclear reactions, which enable cryogenic moderators in very close proximity to the target and neutron optics at comparably short distances from the moderator compared to existing sources. While the first effect aims at increasing the phase space density of a moderator, the second allows the extraction of a large phase space volume, which is typically requested for spectrometer applications. We find that competitive spectrometers can be realized if (a) the neutron production rate can be synchronized with the experiment repetition rate and (b) the emission characteristics of the moderator can be matched to the phase space requirements of the experiment. MCNP simulations for protons or deuterons on a Beryllium target with a suitable target/moderator design yield a source brightness, from which we calculate the sample fluxes by phase space considerations for different types of spectrometers. These match closely the figures of todays spectrometers at medium flux sources. Hence we conclude that compact neutron sources might be a viable option for next generation neutron sources

Keyword(s): Others (1st) ; Others (2nd)

Classification:

Contributing Institute(s):
  1. Streumethoden (JCNS-2)
  2. Streumethoden (PGI-4)
  3. JARA-FIT (JARA-FIT)
  4. JCNS-FRM-II (JCNS-FRM-II)
Research Program(s):
  1. 144 - Controlling Collective States (POF3-144) (POF3-144)
  2. 524 - Controlling Collective States (POF3-524) (POF3-524)
  3. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
  4. 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) (POF3-621)
  5. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)
Experiment(s):
  1. No specific instrument

Appears in the scientific report 2018
Database coverage:
Medline ; Creative Commons Attribution CC BY 4.0 ; OpenAccess ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; NationallizenzNationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection
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The record appears in these collections:
Institute Collections > JCNS > JCNS-FRM-II
Document types > Articles > Journal Article
Institute Collections > JCNS > JCNS-2
JARA > JARA > JARA-JARA\-FIT
Institute Collections > PGI > PGI-4
Workflow collections > Public records
Workflow collections > Publication Charges
Publications database
Open Access

 Record created 2018-01-04, last modified 2022-09-30


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