Neutron Energy and Time-of-flight Spectra Behind the Lateral Shield of a High Energy Electron Accelerator Beam Dump,Part I: Measurements

Technical Report · Tue Sep 24 04:00:00 EDT 2002

DOI:https://doi.org/10.2172/801812· OSTI ID:801812

Roesler, Stefan ^[1]

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1. SLAC

Neutron energy and time-of-flight spectra were measured behind the lateral shield of the electron beam dump at the Final Focus Test Beam (FFTB) facility at the Stanford Linear Accelerator Center. The neutrons were produced by a 28.7 GeV electron beam hitting the aluminum beam dump of the FFTB which is housed inside a thick steel and concrete shield. The measurements were performed using a NE213 organic liquid scintillator behind different thicknesses of the concrete shield of 274 cm, 335 cm, and 396 cm, respectively. The neutron energy spectra between 6 and 800 MeV were obtained by unfolding the measured pulse height spectrum with the detector response function. The attenuation length of neutrons in concrete was then derived. The spectra of neutron time-of-flight between beam on dump and neutron detection by NE213 were also measured. The corresponding experimental results were simulated with the FLUKA Monte Carlo code. The experimental results show good agreement with the simulated results.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 801812
• Report Number(s): SLAC-PUB-9506
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ALUMINIUM
BEAM DUMPS
ELECTRON BEAMS
ELECTRONS
ENERGY SPECTRA
LIQUID SCINTILLATORS
NEUTRON DETECTION
NEUTRONS
RESPONSE FUNCTIONS
SHIELDS
SPECTRA
STANFORD LINEAR ACCELERATOR CENTER