Characterisation of a MeV Bremsstrahlung x-ray source produced from a high intensity laser for high areal density object radiography

Journal Article · Thu Aug 15 04:00:00 EDT 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4818505· OSTI ID:22220671

Courtois, C.; Compant La Fontaine, A.; Bazzoli, S.; Bourgade, J. L.; Gazave, J.; Lagrange, J. M.; Landoas, O.; Dain, L. Le; Pichoff, N. ^[1]; Edwards, R.; Aedy, C. ^[2]; Mastrosimone, D.; Pien, G.; Stoeckl, C. ^[3]

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1. CEA, DAM, DIF, F-91297 Arpajon (France)
2. AWE Plc., Aldermaston, Reading RG7 4PR (United Kingdom)
3. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)

Results of an experiment to characterise a MeV Bremsstrahlung x-ray emission created by a short (<10 ps) pulse, high intensity (1.4 × 10{sup 19} W/cm{sup 2}) laser are presented. X-ray emission is characterized using several diagnostics; nuclear activation measurements, a calibrated hard x-ray spectrometer, and dosimeters. Results from the reconstructed x-ray energy spectra are consistent with numerical simulations using the PIC and Monte Carlo codes between 0.3 and 30 MeV. The intense Bremsstrahlung x-ray source is used to radiograph an image quality indicator (IQI) heavily filtered with thick tungsten absorbers. Observations suggest that internal features of the IQI can be resolved up to an external areal density of 85 g/cm{sup 2}. The x-ray source size, inferred by the radiography of a thick resolution grid, is estimated to be approximately 400 μm (full width half maximum of the x-ray source Point Spread Function)

• OSTI ID: 22220671
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 20; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BREMSSTRAHLUNG
COMPUTERIZED SIMULATION
DOSEMETERS
ENERGY SPECTRA
HARD X RADIATION
LASERS
MEV RANGE
MONTE CARLO METHOD
PLASMA DIAGNOSTICS
PLASMA PRODUCTION
PLASMA SIMULATION
TUNGSTEN
X-RAY SOURCES
X-RAY SPECTROMETERS