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Title: Precision X-Band Linac Technologies for Nuclear Photonics Gamma-Ray Sources

Nuclear photonics is an emerging field of research requiring new tools, including high spectral brightness, tunable gamma-ray sources; high photon energy, ultrahigh-resolution crystal spectrometers; and novel detectors. This presentation focuses on the precision linac technology required for Compton scattering gamma-ray light sources, and on the optimization of the laser and electron beam pulse format to achieve unprecedented spectral brightness. Within this context, high-gradient X-band technology will be shown to offer optimal performance in a compact package, when used in conjunction with the appropriate pulse format, and photocathode illumination and interaction laser technologies. The nascent field of nuclear photonics is enabled by the recent maturation of new technologies, including high-gradient X-band electron acceleration, robust fiber laser systems, and hyper-dispersion CPA. Recent work has been performed at LLNL to demonstrate isotope-specific detection of shielded materials via NRF using a tunable, quasi-monochromatic Compton scattering gamma-ray source operating between 0.2 MeV and 0.9 MeV photon energy. This technique is called Fluorescence Imaging in the Nuclear Domain with Energetic Radiation (or FINDER). This work has, among other things, demonstrated the detection of {sup 7}Li shielded by Pb, utilizing gamma rays generated by a linac-driven, laser-based Compton scattering gamma-ray source developed at LLNL. Within this context,more » a new facility is currently under construction at LLNL, with the goal of generating tunable {gamma}-rays in the 0.5-2.5 MeV photon energy range, at a repetition rate of 120 Hz, and with a peak brightness in the 10{sup 20} photons/(s x mm{sup 2} x mrad{sup 2} x 0.1% bw).« less
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Publication Date:
OSTI Identifier:
1026922
Report Number(s):
LLNL-PROC-497653
TRN: US1105146
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Presented at: 2nd International Particle Accelerator Conference, San Sebastian, Spain, Sep 04 - Sep 09, 2011
Research Org:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 42 ENGINEERING; ACCELERATION; ACCELERATORS; BRIGHTNESS; COMPTON EFFECT; DETECTION; ELECTRON BEAMS; ELECTRONS; ENERGY RANGE; FIBERS; FLUORESCENCE; GAMMA SOURCES; ILLUMINANCE; LASERS; LIGHT SOURCES; LINEAR ACCELERATORS; MEV RANGE; OPTIMIZATION; PHOTOCATHODES; PHOTONS; RADIATIONS; SPECTROMETERS