A new neutron time-of-flight detector for fuel-areal-density measurements on OMEGA

Journal Article · Mon Jul 07 00:00:00 EDT 2014 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4886428· OSTI ID:1144749

Glebov, V. Yu. ^[1]; Forrest, C. J. ^[1]; Marshall, K. L. ^[1]; Romanofsky, M. ^[1]; Sangster, T. C. ^[1]; Shoup, M. J. ^[1]; Stoeckl, C. ^[1]

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1. University of Rochester Laboratory for Laser Energetics, , Rochester, New York 14623, USA

A new neutron time-of-flight (nTOF) detector for fuel-areal-density measurements in cryogenic DT implosions was installed on the OMEGA Laser System. The nTOF detector has a cylindrical thin-wall, stainless-steel, 8-in.-diam, 4-in.-thick cavity filled with an oxygenated liquid xylene scintillator. Four gated photomultiplier tubes (PMTs) with different gains are used to measure primary DT and D2 neutrons, down-scattered neutrons in nT and nD kinematic edge regions, and to study tertiary neutrons in the same detector. The nTOF detector is located 13.4 m from target chamber center in a well-collimated line of sight. The design details of the nTOF detector, PMT optimization, and test results on OMEGA will be presented.

• Research Organization: Univ. of Rochester, NY (United States). Lab. for Laser Energetics
• Sponsoring Organization: USDOE
• DOE Contract Number: NA0001944
• OSTI ID: 1144749
• Report Number(s): DOE/NA/0001944-1186; 2014-16; 1186
• Journal Information: Review of Scientific Instruments, Vol. 85, Issue 11; ISSN 0034-6748
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English