Brightness enhancement of a linac-based intense positron beam for total-reflection high-energy positron diffraction (TRHEPD)

Maekawa, Masaki; Wada, Ken*; Fukaya, Yuki ; Kawasuso, Atsuo; Mochizuki, Izumi*; Shidara, Tetsuo*; Hyodo, Toshio*

The brightness of a linac-based intense positron beam was enhanced for reflection high-energy positron diffraction (RHEPD) measurements. It gave more than 60 times intensified diffraction pattern from a Si(111)-77 reconstructed surface compared to a previous result with a $^{22}$ Na-based positron beam. An improved signal-to-noise ratio in the obtained pattern due to the intensified beam allowed to observe clear fractional-order spots in the higher Laue-zones, those had not been observed previously.

Language	:	English
Journal	:	European Physical Journal D
Volume	:	68
Number	:	6
Pages	:	p.165_1 - 165_6
Publication Year/Month	:	2014/06
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Paper URL	:	https://doi.org/10.1140/epjd/e2014-40802-7
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Keywords	:	no keyword
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Registration No. : AA20130910
JAEA Abstracts No. :
Paper Submission No. : 28094

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