Digitale Medien
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
75 (1994), S. 3798-3805
ISSN:
1089-7550
Quelle:
AIP Digital Archive
Thema:
Physik
Notizen:
Presented are the detailed characteristics of a laser-plasma x-ray source that is successfully used for producing x-ray images of biological specimens in water by contact microscopy. The conversion efficiencies of laser energy to soft x rays are measured for various target materials using a 0.53 μm, 500 ps laser pulse. Yttrium target showed the highest conversion efficiency of around 2.5%/sr to the "water window'' region x rays at 3×1012 W/cm2. Angular distributions of x rays and ions are studied to find the best angular position of specimen for reducing the target debris. The effective x-ray spectrum contributing to making an image of a specimen in water is discussed. It is shown that an extremely small laser could be employed in high-resolution contact microscopy.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1063/1.356055
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