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

T. Sanami, Y. Iwamoto, T. Kajimoto, N. Shigyo, M. Hagiwara, H. S. Lee, E. Ramberg, R. Coleman, A. Soha, D. Jensen, A. Leveling, N. V. Mokhov, D. Boehnlein, K. Vaziri, K. Ishibashi, Y. Sakamoto, H. Nakashima

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Abstract

A 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 × 10 5 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. The 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.

Original languageEnglish
Pages (from-to)26-35
Number of pages10
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume274
DOIs
Publication statusPublished - Mar 1 2012

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

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    Sanami, T., Iwamoto, Y., Kajimoto, T., Shigyo, N., Hagiwara, M., Lee, H. S., Ramberg, E., Coleman, R., Soha, A., Jensen, D., Leveling, A., Mokhov, N. V., Boehnlein, D., Vaziri, K., Ishibashi, K., Sakamoto, Y., & Nakashima, H. (2012). Methodology for the neutron time of flight measurement of 120-GeV proton-induced reactions on a thick copper target. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 274, 26-35. https://doi.org/10.1016/j.nimb.2011.11.041