期刊
APPLIED PHYSICS LETTERS
卷 95, 期 11, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3216845
关键词
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资金
- U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- Czech Ministry of Education [LC510, LC528]
- INGO [LA08024]
- Academy of Sciences of the Czech Republic [Z10100523, IAA400100701, KAN300100702]
We exposed bulk SiC and films of SiC and B4C to single 25 fs long free-electron-laser pulses with wavelengths between 13.5 and 32 nm. The materials are candidates for x-ray free-electron laser optics. We found that the threshold for surface-damage of the bulk SiC samples exceeds the fluence required for thermal melting at all wavelengths. The damage threshold of the film sample shows a strong wavelength dependence. For wavelengths of 13.5 and 21.7 nm, the damage threshold is equal to or exceeds the melting threshold, whereas at 32 nm the damage threshold falls below the melting threshold. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3216845]
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