Ultrashort, MeV-scale laser-plasma positron source for positron annihilation lifetime spectroscopy

被引：14

作者：

Audet, Thomas L. ^{[1
]}

Alejo, Aaron ^{[1
]}

Calvin, Luke ^{[1
]}

Cunningham, Mark Hugh ^{[1
]}

Frazer, Glenn Ross ^{[1
]}

Nersisyan, Gagik ^{[1
]}

Phipps, Michael ^{[1
]}

Warwick, Jonathan Richard ^{[1
]}

Sarri, Gianluca ^{[1
]}

Hafz, Nasr A. M. ^{[2
,3
,4
]}

Kamperidis, Christos ^{[2
]}

Li, Song ^{[2
]}

Papp, Daniel ^{[2
]}

机构：

[1] Queens Univ Belfast, Ctr Plasma Phys, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland

[2] ELI HU Nonprofit Ltd, ELI ALPS, H-6728 Szeged, Hungary

[3] Chinese Acad Sci, Natl Lab High Power Laser & Phys, SIOM, Shanghai 201800, Peoples R China

[4] Atom Energy Author, Dept Plasma & Nucl Fus, Nucl Res Ctr, Abu Zabal 13759, Egypt

来源：

PHYSICAL REVIEW ACCELERATORS AND BEAMS | 2021年 / 24卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

ENERGY;

D O I：

10.1103/PhysRevAccelBeams.24.073402

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

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 103. 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 105 positrons/s, of interest for fast volumetric scanning of materials at high resolution.

引用

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