High e+/e– ratio dense pair creation with 1021W.cm–2 laser irradiating solid targets

Liang, E.; Clarke, T.; Henderson, A.; Fu, W.; Lo, W.; Taylor, D.; Chaguine, P.; Zhou, S.; Hua, Y.; Cen, X.; Wang, X.; Kao, J.; Hasson, H.; Dyer, G.; Serratto, K.; Riley, N.; Donovan, M.; Ditmire, T.

doi:10.1038/srep13968

Title: High e+/e– ratio dense pair creation with 10²¹W.cm^–2 laser irradiating solid targets

Journal Article · Mon Sep 14 00:00:00 EDT 2015 · Scientific Reports

DOI:https://doi.org/10.1038/srep13968· OSTI ID:1325563

Liang, E. ^[1]; Clarke, T. ^[1]; Henderson, A. ^[1]; Fu, W. ^[1]; Lo, W. ^[1]; Taylor, D. ^[1]; Chaguine, P. ^[1]; Zhou, S. ^[1]; Hua, Y. ^[1]; Cen, X. ^[1]; Wang, X. ^[1]; Kao, J. ^[1]; Hasson, H. ^[2]; Dyer, G. ^[3]; Serratto, K. ^[3]; Riley, N. ^[3]; Donovan, M. ^[3]; Ditmire, T. ^[3]

Rice Univ., Houston, TX (United States)
Rice Univ., Houston, TX (United States); Univ. of Texas, Austin, TX (United States)
Univ. of Texas, Austin, TX (United States)

In this study, we report results of new pair creation experiments using ~100 Joule pulses of the Texas Petawatt Laser to irradiate solid gold and platinum targets, with intensities up to ~1.9 × 10²¹ W.cm^–2 and pulse durations as short as ~130 fs. Positron to electron (e+/e–) ratios >15% were observed for many thick disk and rod targets, with the highest e+/e– ratio reaching ~50% for a Pt rod. The inferred pair yield was ~ few ×10¹⁰ with emerging pair density reaching ~10¹⁵/cm³ so that the pair skin depth becomes < pair jet transverse size. These results represent major milestones towards the goal of creating a significant quantity of dense pair-dominated plasmas with e+/e– approaching 100% and pair skin depth << pair plasma size, which will have wide-ranging applications to astrophysics and fundamental physics.

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Research Organization:: Rice Univ., Houston, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0001481

OSTI ID:: 1325563

Journal Information:: Scientific Reports, Vol. 5; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 58 works

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Generation of GeV positron and γ -photon beams with controllable angular momentum by intense lasers Zhu, Xing-Long; Yu, Tong-Pu; Chen, Min New Journal of Physics, Vol. 20, Issue 8 https://doi.org/10.1088/1367-2630/aad71a	journal	August 2018
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