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Title: Overview of Current Progress on the LLNL Nuclear Photonics Facility and Mono-energetic Gamma-ray Source

Authors:
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Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1261085
Report Number(s):
SLAC-PUB-16592
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Journal Name: Conf.Proc.C110328:2456-2458,2011; Conference: Presented at Particle Accelerator, 24th Conference (PAC'11) 28 Mar - 1 Apr 2011, New York, USA
Country of Publication:
United States
Language:
English
Subject:
Accelerators,ACCPHY

Citation Formats

Hartemann, F.V., Albert, F., Anderson, S.G., Bayramian, A.J., Cross, R.R., Ebbers, C.A., Gibson, D.J., Houck, T.L., Marsh, R.A., Messerly, M.J., Siders, C.W., McNabb, D.P., Barty, C.P.J., /LLNL, Livermore, Adolphsen, C.E., Chu, T.S., Jongewaard, E.N., Tantawi, S.G., Vlieks, A.E., Wang, F., Wang, J.W., Raubenheimer, T.O., and /SLAC. Overview of Current Progress on the LLNL Nuclear Photonics Facility and Mono-energetic Gamma-ray Source. United States: N. p., 2016. Web.
Hartemann, F.V., Albert, F., Anderson, S.G., Bayramian, A.J., Cross, R.R., Ebbers, C.A., Gibson, D.J., Houck, T.L., Marsh, R.A., Messerly, M.J., Siders, C.W., McNabb, D.P., Barty, C.P.J., /LLNL, Livermore, Adolphsen, C.E., Chu, T.S., Jongewaard, E.N., Tantawi, S.G., Vlieks, A.E., Wang, F., Wang, J.W., Raubenheimer, T.O., & /SLAC. Overview of Current Progress on the LLNL Nuclear Photonics Facility and Mono-energetic Gamma-ray Source. United States.
Hartemann, F.V., Albert, F., Anderson, S.G., Bayramian, A.J., Cross, R.R., Ebbers, C.A., Gibson, D.J., Houck, T.L., Marsh, R.A., Messerly, M.J., Siders, C.W., McNabb, D.P., Barty, C.P.J., /LLNL, Livermore, Adolphsen, C.E., Chu, T.S., Jongewaard, E.N., Tantawi, S.G., Vlieks, A.E., Wang, F., Wang, J.W., Raubenheimer, T.O., and /SLAC. Thu . "Overview of Current Progress on the LLNL Nuclear Photonics Facility and Mono-energetic Gamma-ray Source". United States. doi:. https://www.osti.gov/servlets/purl/1261085.
@article{osti_1261085,
title = {Overview of Current Progress on the LLNL Nuclear Photonics Facility and Mono-energetic Gamma-ray Source},
author = {Hartemann, F.V. and Albert, F. and Anderson, S.G. and Bayramian, A.J. and Cross, R.R. and Ebbers, C.A. and Gibson, D.J. and Houck, T.L. and Marsh, R.A. and Messerly, M.J. and Siders, C.W. and McNabb, D.P. and Barty, C.P.J. and /LLNL, Livermore and Adolphsen, C.E. and Chu, T.S. and Jongewaard, E.N. and Tantawi, S.G. and Vlieks, A.E. and Wang, F. and Wang, J.W. and Raubenheimer, T.O. and /SLAC},
abstractNote = {},
doi = {},
journal = {Conf.Proc.C110328:2456-2458,2011},
number = ,
volume = ,
place = {United States},
year = {Thu Jul 07 00:00:00 EDT 2016},
month = {Thu Jul 07 00:00:00 EDT 2016}
}

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  • Recent progress in accelerator physics and laser technology have enabled the development of a new class of tunable gamma-ray light sources based on Compton scattering between a high-brightness, relativistic electron beam and a high intensity laser pulse produced via chirped-pulse amplification (CPA). A precision, tunable Mono-Energetic Gamma-ray (MEGa-ray) source driven by a compact, high-gradient X-band linac is currently under development and construction at LLNL. High-brightness, relativistic electron bunches produced by an X-band linac designed in collaboration with SLAC NAL will interact with a Joule-class, 10 ps, diode-pumped CPA laser pulse to generate tunable {gamma}-rays in the 0.5-2.5 MeV photon energymore » range via Compton scattering. This MEGa-ray source will be used to excite nuclear resonance fluorescence in various isotopes. Applications include homeland security, stockpile science and surveillance, nuclear fuel assay, and waste imaging and assay. The source design, key parameters, and current status are presented, along with important applications, including nuclear resonance fluorescence. In conclusion, we have optimized the design of a high brightness Compton scattering gamma-ray source, specifically designed for NRF applications. Two different parameters sets have been considered: one where the number of photons scattered in a single shot reaches approximately 7.5 x 10{sup 8}, with a focal spot size around 8 {micro}m; in the second set, the spectral brightness is optimized by using a 20 {micro}m spot size, with 0.2% relative bandwidth.« less
  • Recent progress in accelerator physics and laser technology have enabled the development of a new class of tunable gamma-ray light sources based on Compton scattering between a high-brightness, relativistic electron beam and a high intensity laser pulse produced via chirped-pulse amplification (CPA). A precision, tunable Mono-Energetic Gamma-ray (MEGa-ray) source driven by a compact, high-gradient X-band linac is currently under development and construction at LLNL. High-brightness, relativistic electron bunches produced by an X-band linac designed in collaboration with SLAC NAL will interact with a Joule-class, 10 ps, diode-pumped CPA laser pulse to generate tunable {gamma}-rays in the 0.5-2.5 MeV photon energymore » range via Compton scattering. This MEGaray source will be used to excite nuclear resonance fluorescence in various isotopes. Applications include homeland security, stockpile science and surveillance, nuclear fuel assay, and waste imaging and assay. The source design, key parameters, and current status are presented, along with important applications, including nuclear resonance fluorescence.« less
  • A Mono-energetic Gamma-ray (MEGa-ray) source, based on Compton scattering of a high-intensity laser beam off a highly relativistic electron beam, requires highly specialized laser systems. To minimize the bandwidth of the {gamma}-ray beam, the scattering laser must have minimal bandwidth, but also match the electron beam depth of focus in length. This requires a {approx}1 J, 10 ps, fourier-transform-limited laser system. Also required is a high-brightness electron beam, best provided by a photoinjector. This electron source requires a second laser system with stringent requirements on the beam including flat transverse and longitudinal profiles and fast rise times. Furthermore, these systemsmore » must be synchronized to each other with ps-scale accuracy. Using a novel hyper-dispersion compressor configuration and advanced fiber amplifiers and diode-pumped Nd:YAG amplifiers, we have designed laser systems that meet these challenges for the X-band photoinjector and Compton-scattering source being built at Lawrence Livermore National Laboratory.« less
  • In this paper two topics will be presented: (a) the integral measurements and calculations of gamma-ray and neutron emission spectra due to a source of 14 MeV neutrons from materials of interest to thermonuclear reactors and (b) an overview of the new multi-user accelerator facility being built at LLNL. Under (a), recent measurements of the gamma-ray and neutron leakage spectra from materials ranging from Be to /sup 238/U pulsed with 14 MeV neutrons are presented. The Monte Carlo calculational analysis using the codes TART and SANDYL with the ENDL and ENDF/B-V photon-neutron libraries is discussed. Under (b), details of themore » new multi-disciplinary laboratory centered around a 10 MV Van de Graaff with four ion sources and 19 experimental beam lines will be given. The experimental program to be carried out in this facility will be discussed. 19 refs., 4 figs., 2 tabs.« less