Optimized x-ray emission from 10 ns long germanium x-ray sources at the National Ignition Facility-Reference-Cited by-同舟云学术

Optimized x-ray emission from 10 ns long germanium x-ray sources at the National Ignition Facility

Published:2022-12-01 Issue:12 Volume:93 Page:123902
ISSN:0034-6748
Container-title:Review of Scientific Instruments
language:en
Short-container-title:Review of Scientific Instruments

Author:

Werellapatha K.¹^ORCID,Hall G. N.¹^ORCID,Krauland C.²^ORCID,Krygier A.¹^ORCID,Bhandarkar N.¹^ORCID,Bradley D. K.¹^ORCID,Coppari F.¹^ORCID,Gorman M. G.¹^ORCID,Heinbockel C.¹^ORCID,Kemp G. E.¹^ORCID,Khan S. F.¹^ORCID,Lazicki A.¹,Masters N.¹,May M. J.¹^ORCID,Nagel S. R.¹^ORCID,Palmer N. E.¹,Eggert J. H.¹^ORCID,Benedetti L. R.¹^ORCID

Affiliation:

1. Lawrence Livermore National Laboratory, Livermore, California 94550, USA

2. General Atomics, San Diego, California 92121, USA

Abstract

This study investigates methods to optimize quasi-monochromatic, ∼10 ns long x-ray sources (XRS) for time-resolved x-ray diffraction measurements of phase transitions during dynamic laser compression measurements at the National Ignition Facility (NIF). To support this, we produce continuous and pulsed XRS by irradiating a Ge foil with NIF lasers to achieve an intensity of 2 × 1015 W/cm2, optimizing the laser-to-x-ray conversion efficiency. Our x-ray source is dominated by Ge He-α line emission. We discuss methods to optimize the source to maintain a uniform XRS for ∼10 ns, mitigating cold plasma and higher energy x-ray emission lines.

Funder

U.S. Department of Energy

Publisher

AIP Publishing

Subject

Instrumentation

Link

https://aip.scitation.org/doi/am-pdf/10.1063/5.0106696

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1. X-ray diffraction at the National Ignition Facility

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