skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: THE FIGARO FACILITY AT LOS ALAMOS: CAPABILITIES AND FIRST RESULTS

Abstract

No abstract prepared.

Authors:
; ;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
785159
Report Number(s):
LA-UR-01-4885
TRN: US0111271
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Aug 2001
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; LANL; NUCLEAR FACILITIES; USES; NUCLEAR PHYSICS

Citation Formats

R. C. HAIGHT, M. DEVLIN, and ET AL. THE FIGARO FACILITY AT LOS ALAMOS: CAPABILITIES AND FIRST RESULTS. United States: N. p., 2001. Web.
R. C. HAIGHT, M. DEVLIN, & ET AL. THE FIGARO FACILITY AT LOS ALAMOS: CAPABILITIES AND FIRST RESULTS. United States.
R. C. HAIGHT, M. DEVLIN, and ET AL. Wed . "THE FIGARO FACILITY AT LOS ALAMOS: CAPABILITIES AND FIRST RESULTS". United States. doi:. https://www.osti.gov/servlets/purl/785159.
@article{osti_785159,
title = {THE FIGARO FACILITY AT LOS ALAMOS: CAPABILITIES AND FIRST RESULTS},
author = {R. C. HAIGHT and M. DEVLIN and ET AL},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Aug 01 00:00:00 EDT 2001},
month = {Wed Aug 01 00:00:00 EDT 2001}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • A new beam line at the fast neutron spallation source at Los Alamos Neutron Science Center has been constructed for studies of neutron-induced reactions producing gamma rays, internal conversion electrons or neutrons. This facility, called FIGARO (Fast neutron-Induced GAmma-Ray Observer), follows on the great successes of GEANIE (described in other contributions to this Conference), by detecting de-excitation gamma rays with high-resolution germanium detectors. FIGARO has fewer gamma-ray detectors than GEANIE, but instead offers other features including: extremely good collimation of the neutron beam for background reduction, a flexible experimental area to optimize detection efficiency and to allow evaluation of othermore » detectors such as ICEBALL-II for internal conversion electrons, inclusion of neutron detectors for the study of neutron-gamma coincidences, beam time to relieve the scheduling pressure on GEANIE, and a PC-based data acquisition system. Our initial measurements include level density studies through 59Co(n,xgamma) reactions to complement our previous 59Co(n,xalpha) measurements, reaction studies of MeV neutrons on 99Tc with the goal of determining cross sections relevant to transmutation and neutron transport in the design of facilities to incinerate nuclear waste, and an assessment of measuring internal conversion electrons, rather than gamma rays, produced by neutron excitation of actinides.« less
  • The Los Alamos Critical Experiments Facility (LACEF) has been involved in the testing and evaluation of criticality accident alarm systems since 1980. At that time we designed and built the solution critical assembly SHEBA for this purpose. The response of the alarms to neutron pulses was done using the GODIVA-IV Burst Assembly. Currently, SHEBA and a new fast assembly, SKUA, are being modified for burst operation. 8 refs., 7 figs., 2 tabs.
  • The Target-4 neutron source at the Los Alamos Meson Physics Facility (LAMPF) has recently been commissioned and used as a )open quotes)white)close quotes) source of fast neutrons from 1 to 500 MeV. A 90-meter flight path at a neutron production angle of 15 degrees has been characterized for neutron flux and spectral shape. The flux and shape agree well with calculated values showing that this is indeed an intense and useful white neutron source. Initial measurements of the /sup 12/C(n,p) reaction at forward angles have been made in the energy range 50 to 500 MeV. The results point the waymore » to improve detector schemes and to a program of (n,p) cross section measurements in the energy range where preequilibrium processes dominate much of the charged-particle emission spectra. 3 refs., 2 figs.« less
  • A calorimeter capable of measuring the power output from special nuclear material in 208-liter (55-gal) shipping or storatge containers was designed and fabricated at Los Alamos National Laboratory (LANL). This high-sensitivity, large-volume calorimeter (LVC) provides a reliable NDA method to measure many difficult-to-assay forms of plutonium and tritium more accurately. The entire calorimeter is 104 cm wide x 157 cm deep x 196 cm high in the closed position. The LVC also requires space for a standard electronics rack. A standard 208-1 drum with a 60-cm-diameter retaining ring with bolt will fit into the LVC measurement chamber. With careful positioning,more » cylindrical items up to 66 cm in diameter and 100 cm tall can be assayed in the LVC. The LVC was used to measure numerous plutonium-bearing items in 208-1 drums at the Los Alamos Plutonium Facility. Measurement results from real waste drums that were previously assayed using multiple NDA systems are compared with the LVC results. The calorimeter previously performed well under laboratory conditions using Pu-238 heat standards. The in-plant instrument performance is compared with the laboratory performance. Assay times, precision, measurement threshold, and operability of the LVC are also presented.« less