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AXIS: an instrument for imaging Compton radiographs using the Advanced Radiography Capability on the NIF

Compton radiography is an important diagnostic for Inertial Confinement Fusion (ICF), as it provides a means to measure the density and asymmetries of the DT fuel in an ICF capsule near the time of peak compression. The AXIS instrument (ARC (Advanced Radiography Capability) X-ray Imaging System) is...

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Bibliographic Details
Published in:Review of scientific instruments 2014-11, Vol.85 (11), p.11D624-11D624
Main Authors: Hall, G N, Izumi, N, Tommasini, R, Carpenter, A C, Palmer, N E, Zacharias, R, Felker, B, Holder, J P, Allen, F V, Bell, P M, Bradley, D, Montesanti, R, Landen, O L
Format: Article
Language:English
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Summary:Compton radiography is an important diagnostic for Inertial Confinement Fusion (ICF), as it provides a means to measure the density and asymmetries of the DT fuel in an ICF capsule near the time of peak compression. The AXIS instrument (ARC (Advanced Radiography Capability) X-ray Imaging System) is a gated detector in development for the National Ignition Facility (NIF), and will initially be capable of recording two Compton radiographs during a single NIF shot. The principal reason for the development of AXIS is the requirement for significantly improved detection quantum efficiency (DQE) at high x-ray energies. AXIS will be the detector for Compton radiography driven by the ARC laser, which will be used to produce Bremsstrahlung X-ray backlighter sources over the range of 50 keV-200 keV for this purpose. It is expected that AXIS will be capable of recording these high-energy x-rays with a DQE several times greater than other X-ray cameras at NIF, as well as providing a much larger field of view of the imploded capsule. AXIS will therefore provide an image with larger signal-to-noise that will allow the density and distribution of the compressed DT fuel to be measured with significantly greater accuracy as ICF experiments are tuned for ignition.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4892558