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Title: Methodology for the neutron time of flight measurement of 120-GeV proton-induced reactions on a thick copper target

Our methodology for the time-of-flight measurement of the neutron energy spectrum for a high-energy proton-beam-induced reaction was established at the Fermilab Test Beam Facility of the Fermi National Accelerator Laboratory. The 120-GeV proton beam with 3 × 105 protons/spill was prepared for event-by-event counting of incident protons and emitted neutrons for time-of-flight energy determination. An NE213 organic liquid scintillator (12.7 cm in diameter by 12.7 cm in length) was employed with a veto plastic scintillator and a pulse-shape discrimination technique to identify neutrons. Raw waveforms of NE213, veto and beam detectors were recorded to discriminate the effects of multi-proton beam events by considering different time windows. The neutron energy spectrum ranging from 10 to 800 MeV was obtained for a 60-cm-long copper target at 90° with respect to the beam axis. Finally our obtained spectrum was consistent with that deduced employing the conventional unfolding technique as well as that obtained in a 40-GeV/c thin-target experiment.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [1] ;  [4] ;  [5] ;  [5] ;  [5] ;  [5] ;  [5] ;  [5] ;  [5] ;  [5] ;  [3] ;  [2] ;  [2]
  1. High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
  2. Japan Atomic Energy Agency (JAEA), Tokai (Japan)
  3. Kyushu Univ. (Japan)
  4. Pohang Accelerator Lab. (PAL) (Korea, Republic of)
  5. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
OSTI Identifier:
1234824
Report Number(s):
FERMILAB-PUB--15-555
Journal ID: ISSN 0168-583X
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section B, Beam Interactions with Materials and Atoms
Additional Journal Information:
Journal Volume: 274; Journal ID: ISSN 0168-583X
Publisher:
Elsevier
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Orgs:
JASMIN Collaboration
Country of Publication:
United States
Language:
English
Subject:
neutron spectrum; time-of-flight method; 120-GeV proton; copper target; NE213 liquid scintillator