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Title: The Effect Of Neutron Attenuation On Power Deposition In Nuclear Pumped 3He-Lasers

Abstract

Nuclear-pumped lasers (NPLs) are driven by the products of nuclear reactions and directly convert the nuclear energy to directed optical energy. Pumping gas lasers by nuclear reaction products has the advantage of depositing large energies per reaction. The need for high laser power output implies high operating pressure. In the case of volumetric excitation by 3He(n, p)3H reactions, however, operation at high pressure (more than a few atm) causes excessive neutron attenuation in the 3He gas. This fact adversely effects on energy deposition and, hence, laser output power and beam quality. Here, spatial and temporal variations of neutron flux inside a closed 3He -filled cylindrical laser tube have been numerically calculated for various tube radii and operating pressures by using a previously reported dynamic model for energy deposition. Calculations are made by using ITU TRIGA Mark II Reactor as the neutron source. The effects of neutron attenuation on power deposition are examined.

Authors:
 [1]
  1. Istanbul Technical University, Energy Institute, Istanbul (Turkey)
Publication Date:
OSTI Identifier:
21057089
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 899; Journal Issue: 1; Conference: 6. international conference of the Balkan Physical Union, Istanbul (Turkey), 22-26 Aug 2006; Other Information: DOI: 10.1063/1.2733056; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ATTENUATION; ENERGY ABSORPTION; EXCITATION; GAS LASERS; HELIUM 3; HELIUM 3 TARGET; NEUTRON FLUX; NEUTRON REACTIONS; NEUTRON SOURCES; NEUTRONS; NUCLEAR PUMPING; NUMERICAL ANALYSIS; PROTON-NEUTRON INTERACTIONS; PROTONS; TRIGA-2 REACTOR; TRITONS

Citation Formats

Cetin, Fuesun. The Effect Of Neutron Attenuation On Power Deposition In Nuclear Pumped 3He-Lasers. United States: N. p., 2007. Web. doi:10.1063/1.2733056.
Cetin, Fuesun. The Effect Of Neutron Attenuation On Power Deposition In Nuclear Pumped 3He-Lasers. United States. doi:10.1063/1.2733056.
Cetin, Fuesun. Mon . "The Effect Of Neutron Attenuation On Power Deposition In Nuclear Pumped 3He-Lasers". United States. doi:10.1063/1.2733056.
@article{osti_21057089,
title = {The Effect Of Neutron Attenuation On Power Deposition In Nuclear Pumped 3He-Lasers},
author = {Cetin, Fuesun},
abstractNote = {Nuclear-pumped lasers (NPLs) are driven by the products of nuclear reactions and directly convert the nuclear energy to directed optical energy. Pumping gas lasers by nuclear reaction products has the advantage of depositing large energies per reaction. The need for high laser power output implies high operating pressure. In the case of volumetric excitation by 3He(n, p)3H reactions, however, operation at high pressure (more than a few atm) causes excessive neutron attenuation in the 3He gas. This fact adversely effects on energy deposition and, hence, laser output power and beam quality. Here, spatial and temporal variations of neutron flux inside a closed 3He -filled cylindrical laser tube have been numerically calculated for various tube radii and operating pressures by using a previously reported dynamic model for energy deposition. Calculations are made by using ITU TRIGA Mark II Reactor as the neutron source. The effects of neutron attenuation on power deposition are examined.},
doi = {10.1063/1.2733056},
journal = {AIP Conference Proceedings},
number = 1,
volume = 899,
place = {United States},
year = {Mon Apr 23 00:00:00 EDT 2007},
month = {Mon Apr 23 00:00:00 EDT 2007}
}