Ultrashort, MeV-scale laser-plasma positron source for positron annihilation lifetime spectroscopy
Ultrashort, MeV-scale laser-plasma positron source for positron annihilation lifetime spectroscopy
复制标题
用于正电子湮没寿命光谱的超短兆电子伏级激光等离子体正电子源
DOI:
10.1103/physrevaccelbeams.24.073402
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发表时间:
2021
影响因子:
1.7
通讯作者:
Audet T
中科院分区:
文献类型:
--
作者:
Audet T
Submicron defects represent a well-known fundamental problem in manufacturing since they can significantly affect performance and lifetime of virtually any high-value component. Positron annihilation lifetime spectroscopy is arguably the only established method capable of detecting defects down to the subnanometer scale but, to date, it only works for surface studies, and with limited resolution. Here, we experimentally and numerically show that laser-driven systems can overcome these well-known limitations, by generating ultrashort positron beams with a kinetic energy tuneable from 500 keV up to 2 MeV and a number of positrons per shot in a 50 keV energy slice of the order of. Numerical simulations of the expected performance of a typical mJ-scale kHz laser demonstrate the possibility of generating MeV-scale narrow-band and ultrashort positron beams with a flux exceeding, of interest for fast volumetric scanning of materials at high resolution.
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影响因子:
8.6
作者:
TAJIMA, T;DAWSON, JM
通讯作者:
DAWSON, JM
DOI:
--
发表时间:
1970
期刊:
影响因子:
--
作者:
R. M. Singru
通讯作者:
R. M. Singru
影响因子:
8.6
作者:
Chen, Hui;Wilks, S. C.;Beiersdorfer, P.
通讯作者:
Beiersdorfer, P.
影响因子:
19.6
作者:
Fuchs, J;Antici, P;Audebert, R
通讯作者:
Audebert, R
影响因子:
8.6
作者:
Green, J. S.;Ovchinnikov, V. M.;Norreys, P. A.
通讯作者:
Norreys, P. A.