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

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 3x10^5protons/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 (12.7cm in diameter by 12.7cm 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 800MeV was obtained for a 60-cm-long copper target at 90^o 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.

Neutron spectrum
Time-of-flight method
120-GeV proton
Copper target
NE213 liquid scintillator
copper: target
n: energy spectrum
scintillation counter: liquid
n: time-of-flight
p: beam

References(16)

Figures(0)

[1]

Review of particle physics

K. Nakamura
(
- Tokyo U., IPMU and
- KEK, Tsukuba
)
,
K. Hagiwara
(
- KEK, Tsukuba
)
,
K. Hikasa
(
- Tohoku U.
)
,
H. Murayama
(
- LBL, Berkeley and
- UC, Berkeley and
- Tokyo U., IPMU
)
,
M. Tanabashi
(
- Nagoya U.
)

et al.

- J.Phys.G 37 (2010) 075021
•
DOI:
- 10.1088/0954-3899/37/7A/075021

[2]

The MARS Code System User’s Guide

N.V. Mokhov

[3]

PHITS: Particle and Heavy Ion Transport code System, Version 2.23, JAEA-Data/Code-022

K. Niita
,
N. Matsuda
,
Y. Iwamoto
,
H. Iwase
,
T. Sato

et al.

[4]

FLUKA: A multi-particle transport code (Program version 2005)

Alfredo Ferrari
(
- CERN and
- INFN, Milan
)
,
Paola R. Sala
(
- INFN, Milan
)
,
Alberto Fasso
(
- SLAC
)
,
Johannes Ranft
(
- Siegen U.
)

DOI:
- 10.2172/877507

[5]

Measurement and calculation of high-energy neutron spectra behind shielding at the CERF 120-GeV/c hadron beam facility

N. Nakao
(
- SLAC
)
,
S. Taniguchi
(
- Japan Synch. Radiation Res. Inst.
)
,
S. Roesler
(
- CERN
)
,
M. Brugger
(
- CERN
)
,
M. Hagiwara
(
- CYRIC, Tohoku U.
)

et al.

- Nucl.Instrum.Meth.B 266 (2008) 93-106
•
DOI:
- 10.1016/j.nimb.2007.09.043

[6]

JASMIN: Japanese-American study of muon interactions and neutron detection, Proceedings of 10th Workshop of Shielding Aspects of Accelerators, Targets and irradiation facilities, CERN, Switzerland, 2-4 June, p. 235

H. Nakashima
,
N.V. Mokhov
,
Y. Kasugai
,
N. Matsuda
,
Y. Iwamoto

et al.

[7]

Shielding experiments under JASMIN collaboration at FERMILAB (I) overview of the research activities

Y. Kasugai
,
H. Matsumura
,
H. Yashima
,
N. Matsuda
,
N. Kinoshita

et al.

- J.Korean Phys.Soc. 59 (2011) 2063

[8]

Shielding experiments at high energy accelerators of fermilab (III): neutron spectrum measurements in intense pulsed neutron fields of the 120-GeV proton facility using a current bonner sphere technique

M. Hagiwara
,
T. Sanami
,
Y. Iwamoto
,
H. Arakawa
,
N. Shigyo

et al.

- Prog.Nucl.Sci.Tech. 1 (2011) 52

[9]

K. Ishibashi
,
H. Takada
,
T. Nakamoto
,
N. Shigyo
,
K. Maehata

et al.

- J .Nucl.Sci.Technol. 34 (1997) 529

[10]

S. Agosteo
,
C. Birattari
,
E. Dimovasili
,
A. Foglio Para
,
M. Silari

et al.

- Nucl.Instrum.Meth.B 229 (2005) 24

[11]

< >

- http://www-ppd.fnal.gov/MTBF-w/

[12]

SCINFUL-QMD: Monte Carlo based computer code to calculate response function and detection efficiency of a liquid organic scintillator for neutron energies up to 3 GeV, JAEA-Data/Code-023

D. Satoh
,
T. Sato
,
N. Shigyo
,
K. Ishibashi

[13]

Neutron energy spectrum from 120 GeV protons on a thick copper target, Proceedings of 10th Workshop of Shielding Aspects of Accelerators, Targets and irradiation facilities, CERN, Switzerland,, p. 65

N. Shigyo
,
T. Sanami
,
T. Kajimoto
,
Y. Iwamoto
,
M. Hagiwara

et al.

[14]

IMPROVED PREDICTIONS OF NEUTRON DETECTION EFFICIENCY FOR HYDROCARBON SCINTILLATORS FROM 1-MEV TO ABOUT 300-MeV

- Nucl.Instrum.Meth. 161 (1979) 439-447
•
DOI:
- 10.1016/0029-554X(79)90417-8

[15]

FORIST, Neutron Spectrum Unfolding Code (FERDOR with Optimized Resolution using an Iteractive Smoothing Technique), PSR-92, RSIC/ORNL

R.H. Johnson

[16]

Measurement of response functions of organic liquid scintillator for neutron energy range up to 390-MeV

S. Taniguchi
(
- Japan Synch. Radiation Res. Inst. and
- SLAC and
- Shimizu, Tokyo and
- Tohoku U. and
- Osaka U., Res. Ctr. Nucl. Phys.
)
,
N. Nakao
(
- Japan Synch. Radiation Res. Inst. and
- SLAC and
- Shimizu, Tokyo and
- Tohoku U. and
- Osaka U., Res. Ctr. Nucl. Phys.
)
,
H. Yamakawa
(
- Japan Synch. Radiation Res. Inst. and
- SLAC and
- Shimizu, Tokyo and
- Tohoku U. and
- Osaka U., Res. Ctr. Nucl. Phys.
)
,
K. Oishi
(
- Japan Synch. Radiation Res. Inst. and
- SLAC and
- Shimizu, Tokyo and
- Tohoku U. and
- Osaka U., Res. Ctr. Nucl. Phys.
)
,
T. Nakamura
(
- Japan Synch. Radiation Res. Inst. and
- SLAC and
- Shimizu, Tokyo and
- Tohoku U. and
- Osaka U., Res. Ctr. Nucl. Phys.
)

et al.

- Nucl.Instrum.Meth.A 562 (2006) 954-957
•
DOI:
- 10.1016/j.nima.2006.02.114