Journal
OPTICS EXPRESS
Volume 20, Issue 16, Pages 18362-18369Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.018362
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Funding
- BMBF [13N8913]
- BMVBS (WTW) [03WWBE106]
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We present a laser plasma based x-ray microscope for the water window employing a high-average power laser system for plasma generation. At 90 W laser power a brightness of 7.4 x 10(11) photons/(s x sr x mu m(2)) was measured for the nitrogen Ly alpha line emission at 2.478 nm. Using a multilayer condenser mirror with 0.3 % reflectivity 10(6) photons/(mu m(2) x s) were obtained in the object plane. Microscopy performed at a laser power of 60 W resolves 40 nm lines with an exposure time of 60 s. The exposure time can be further reduced to 20 s by the use of new multilayer condenser optics and operating the laser at its full power of 130 W. (C) 2012 Optical Society of America
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