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Title: High e+/e– ratio dense pair creation with 10 21W.cm –2 laser irradiating solid targets

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 × 10 21 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 ×10 10 with emerging pair density reaching ~10 15/cm 3 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.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [3] ;  [3]
  1. Rice Univ., Houston, TX (United States)
  2. Rice Univ., Houston, TX (United States); Univ. of Texas, Austin, TX (United States)
  3. Univ. of Texas, Austin, TX (United States)
Publication Date:
Grant/Contract Number:
SC0001481
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Rice Univ., Houston, TX (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1325563

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., and Ditmire, T.. High e+/e– ratio dense pair creation with 1021W.cm–2 laser irradiating solid targets. United States: N. p., Web. doi:10.1038/srep13968.
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.. High e+/e– ratio dense pair creation with 1021W.cm–2 laser irradiating solid targets. United States. doi:10.1038/srep13968.
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., and Ditmire, T.. 2015. "High e+/e– ratio dense pair creation with 1021W.cm–2 laser irradiating solid targets". United States. doi:10.1038/srep13968. https://www.osti.gov/servlets/purl/1325563.
@article{osti_1325563,
title = {High e+/e– ratio dense pair creation with 1021W.cm–2 laser irradiating solid targets},
author = {Liang, E. and Clarke, T. and Henderson, A. and Fu, W. and Lo, W. and Taylor, D. and Chaguine, P. and Zhou, S. and Hua, Y. and Cen, X. and Wang, X. and Kao, J. and Hasson, H. and Dyer, G. and Serratto, K. and Riley, N. and Donovan, M. and Ditmire, T.},
abstractNote = {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.},
doi = {10.1038/srep13968},
journal = {Scientific Reports},
number = ,
volume = 5,
place = {United States},
year = {2015},
month = {9}
}