期刊
NATURE COMMUNICATIONS
卷 7, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms13686
关键词
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资金
- National Natural Science Foundation of China [11622547, 11474360, 11175255, 91230205, 11374210]
- National Basic Research Program of China [2013CBA01504]
- Leverhulme Trust Research Project Grant
- U.K. EPSRC [EP/N028694/1]
- Plasma HEC Consortium EPSRC Grant [EP/L000237/1]
- Science Challenge Program [JCKY2016212A505]
- NUDT [JQ14-02-02]
- UK EPSRC [EP/G056803/1, EP/G055165/1]
- Engineering and Physical Sciences Research Council [EP/N028694/1, EP/J018171/1] Funding Source: researchfish
- EPSRC [EP/J018171/1, EP/N028694/1] Funding Source: UKRI
Pair production can be triggered by high-intensity lasers via the Breit-Wheeler process. However, the straightforward laser-laser colliding for copious numbers of pair creation requires light intensities several orders of magnitude higher than possible with the ongoing laser facilities. Despite the numerous proposed approaches, creating high-energy-density pair plasmas in laboratories is still challenging. Here we present an all-optical scheme for overdense pair production by two counter-propagating lasers irradiating near-critical-density plasmas at only similar to 10(22)Wcm(-2). In this scheme, bright g-rays are generated by radiation-trapped electrons oscillating in the laser fields. The dense g-photons then collide with the focused counter-propagating lasers to initiate the multi-photon Breit-Wheeler process. Particle-in-cell simulations indicate that one may generate a high-yield (1.05 x 10(11)) over-dense (4 x 10(22) cm(-3)) GeV positron beam using 10 PW scale lasers. Such a bright pair source has many practical applications and could be basis for future compact high-luminosity electron-positron colliders.
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