Efficient picosecond x-ray pulse generation from plasmas in the radiation dominated regime

Hollinger, Reed; Bargsten, Clayton; Shlyaptsev, Vyacheslav N.; Kaymak, Vural; Pukhov, Alexander; Capeluto, Maria Gabriela; Wang, Shoujun; Rockwood, Alex; Wang, Yong; Townsend, Amanda; Prieto, Amy; Stockton, Patrick; Curtis, Alden; Rocca, Jorge J.

doi:10.1364/OPTICA.4.001344

Title: Efficient picosecond x-ray pulse generation from plasmas in the radiation dominated regime

Journal Article · Fri Oct 27 00:00:00 EDT 2017 · Optica

DOI:https://doi.org/10.1364/OPTICA.4.001344· OSTI ID:1405043

Hollinger, Reed; Bargsten, Clayton; Shlyaptsev, Vyacheslav N.; Kaymak, Vural; Pukhov, Alexander;

;

; Rockwood, Alex; Wang, Yong; Townsend, Amanda; Prieto, Amy; Stockton, Patrick; Curtis, Alden; Rocca, Jorge J.

The efficient conversion of optical laser light into bright ultrafast x-ray pulses in laser created plasmas is of high interest for dense plasma physics studies, material science, and other fields. However, the rapid hydrodynamic expansion that cools hot plasmas has limited the x-ray conversion efficiency (CE) to 1% or less. Here we demonstrate more than one order of magnitude increase in picosecond x-ray CE by tailoring near solid density plasmas to achieve a large radiative to hydrodynamic energy loss rate ratio, leading into a radiation loss dominated plasma regime. A record 20% CE into hν > 1 keV photons was measured in arrays of large aspect ratio Au nanowires heated to keV temperatures with ultrahigh contrast femtosecond laser pulses of relativistic intensity. The potential of these bright ultrafast x-ray point sources for table-top imaging is illustrated with single shot flash radiographs obtained using low laser pulse energy. These results will enable the deployment of brighter laser driven x-ray sources at both compact andlarge laser facilities.

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Research Organization:: Colorado State Univ., Fort Collins, CO (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0014610

OSTI ID:: 1405043

Alternate ID(s):: OSTI ID: 1502461

Journal Information:: Optica, Journal Name: Optica Vol. 4 Journal Issue: 11; ISSN 2334-2536

Publisher:: Optical Society of AmericaCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 35 works

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