Efficient Multi-keV X-ray Sources from Ti-doped Aerogel Targets
We have measured the production of h{nu} {ge} 4.5 keV x-rays from low-density Ti-doped aerogel targets at the OMEGA laser facility (University of Rochester). The doped-foam density was {approx} 3 mg/cc. Forty beams of the OMEGA laser ({lambda}{sub L} = 0.351 {micro}m) illuminated the two cylindrical faces of the target with a total power that ranged from 7 to 14 TW. The laser interaction fully ionizes the target (n{sub e}/n{sub crit} {ge} 0.1), and allows the laser-bleaching wave to excite, supersonically, the high-Z emitter ions in the sample. Ti K-shell x-ray emission was spectrally resolved with a two-channel crystal spectrometer and also with a set of filtered aluminum x-ray diodes, both instruments provide absolute measurement of the multi-keV x-ray emission. Back-scattered laser energy is observed to be minimal. We find between 40 - 260 J of output with 4.67 {le} h{nu} {le} 5.0 keV.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 15013784
- Report Number(s):
- UCRL-JRNL-201160; PRLTAO; TRN: US0801279
- Journal Information:
- Physical Review Letters, Vol. 92, Issue 16; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Efficient multi-keV x-ray sources from Ti-doped aerogel targets
Efficient Multi-keV X-ray Sources from Ti-doped Aerogel Targets