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Title: Efficient multi-keV x-ray source generated by nanosecond laser pulse irradiated multi-layer thin foils target

A new target configuration is proposed to generate efficient multi-keV x-ray source using multiple thin foils as x-ray emitters. The target was constructed with several layers of thin foils, which were placed with a specific, optimized spacing. The thin foils are burned though one by one by a nanosecond-long laser pulse, which produced a very large, hot, underdense plasma. One-dimensional radiation hydrodynamic simulations show that the emission region and the multi-keV x-ray flux generated by multi-layer thin foil target are similar to that of the low-density gas or foam target, which is currently a bright multi-keV x-ray source generated by laser heating. Detailed analysis of a range of foil thicknesses showed that a layer-thickness of 0.1 μm is thin enough to generate an efficient multi-keV x-ray source. Additionally, this type of target can be easily manufactured, compared with the complex techniques for fabrication of low-density foam targets. Our preliminary experimental results also verified that the size of multi-keV x-ray emission region could be enhanced significantly by using a multi-layer Ti thin foil target.
Authors:
 [1] ;  [2] ; ; ;  [1] ; ; ; ; ; ;  [3]
  1. Department of Modern Physics and CAS Key Laboratory of Geospace Environment, University of Science and Technology of China, Hefei, Anhui 230026 (China)
  2. (China)
  3. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, Sichuan 621900 (China)
Publication Date:
OSTI Identifier:
22253071
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; FABRICATION; FOAMS; FOILS; KEV RANGE; LASER-RADIATION HEATING; LASERS; LAYERS; PLASMA; PULSES; SIMULATION; X RADIATION; X-RAY SOURCES