학술논문
A new neutron time-of-flight detector for yield and ion-temperature measurements at the OMEGA Laser Facility.
Document Type
Academic Journal
Author
Glebov VY; Laboratory for Laser Energetics, University of Rochester, New York, New York 14623-1299, USA.; Forrest CJ; Laboratory for Laser Energetics, University of Rochester, New York, New York 14623-1299, USA.; Kendrick J; Laboratory for Laser Energetics, University of Rochester, New York, New York 14623-1299, USA.; Knauer JP; Laboratory for Laser Energetics, University of Rochester, New York, New York 14623-1299, USA.; Mannion OM; Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.; McClow H; Laboratory for Laser Energetics, University of Rochester, New York, New York 14623-1299, USA.; Regan SP; Laboratory for Laser Energetics, University of Rochester, New York, New York 14623-1299, USA.; Stoeckl C; Laboratory for Laser Energetics, University of Rochester, New York, New York 14623-1299, USA.; Stanley B; Laboratory for Laser Energetics, University of Rochester, New York, New York 14623-1299, USA.; Theobald W; Laboratory for Laser Energetics, University of Rochester, New York, New York 14623-1299, USA.
Source
Publisher: American Institute Of Physics Country of Publication: United States NLM ID: 0405571 Publication Model: Print Cited Medium: Internet ISSN: 1089-7623 (Electronic) Linking ISSN: 00346748 NLM ISO Abbreviation: Rev Sci Instrum Subsets: PubMed not MEDLINE; MEDLINE
Subject
Language
English
Abstract
A new neutron time-of-flight (nTOF) detector for deuterium-deuterium (DD)-fusion yield and ion-temperature measurements was designed, installed, and calibrated for the OMEGA Laser Facility. This detector provides an additional line of sight for DD neutron yield and ion-temperature measurements for yields exceeding 1 × 10 10 with higher precision than existing detectors. The nTOF detector consists of a 90-mm-diam, 20-mm-thick BC-422 scintillator and a gated Photek photomultiplier tube (PMT240). The PMT collects scintillating light through the 20-mm side of the scintillator without the use of a light guide. There is no lead shielding from hard x rays in order to allow the x-ray instrument response function of the detector to be measured easily. Instead, hard x-ray signals generated in implosion experiments are gated out by the PMT. The design provides a place for glass neutral-density filters between the scintillator and the PMT to avoid PMT saturation at high yields. The nTOF detector is installed in the OMEGA Target Bay along the P8A sub-port line of sight at a distance of 5.3 m from the target chamber center. In addition to DD measurements, the same detector can be used to measure the neutron yield and ion temperature from deuterium-tritium (DT) implosion targets in the 5 × 10 10 to 2 × 10 12 yield range. The design details and the calibration results of this nTOF detector for both D 2 and DT implosions on OMEGA will be presented.