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Akademický článek

Predominant contribution of direct laser acceleration to high-energy electron spectra in a low-density self-modulated laser wakefield accelerator

Autor: P. M. King, K. Miller, N. Lemos, J. L. Shaw, B. F. Kraus, M. Thibodeau, B. M. Hegelich, J. Hinojosa, P. Michel, C. Joshi, K. A. Marsh, W. Mori, A. Pak, A. G. R. Thomas, F. Albert

Publikováno v: Physical Review Accelerators and Beams, Vol 24, Iss 1, p 011302 (2021)

The two-temperature relativistic electron spectrum from a low-density (3×10^{17} cm^{-3}) self-modulated laser wakefield accelerator (SM-LWFA) is observed to transition between temperatures of 19±0.65 and 46±2.45 MeV at an electron energy of about

Externí odkaz: https://doaj.org/article/a07e62479e844a52b4d14455cd78edc8

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Ablating Ion Velocity Distributions in Short-Pulse-Heated Solids via X-Ray Doppler Shifts

Autor: B. F. Kraus, Lan Gao, W. Fox, K. W. Hill, M. Bitter, P. C. Efthimion, A. Moreau, R. Hollinger, Shoujun Wang, Huanyu Song, J. J. Rocca

Publikováno v: Physical Review Letters. 129

Solids ablate under laser irradiation, but experiments have not previously characterized the initiation of this process at ultrarelativistic laser intensities. We present first measurements of bulk ion velocity distributions as ablation begins, captu

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20b0f698492676bc470e56fb39e8c1b5
https://doi.org/10.1103/physrevlett.129.235001

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Streaked sub-ps-resolution x-ray line shapes and implications for solid-density plasma dynamics (invited)

Autor: B. F. Kraus, Lan Gao, K. W. Hill, M. Bitter, P. C. Efthimion, R. Hollinger, Shoujun Wang, Huanyu Song, R. Nedbailo, J. J. Rocca, R. C. Mancini, C. B. Beatty, M. J. MacDonald, R. Shepherd

Publikováno v: The Review of scientific instruments. 93(10)

A high-resolution x-ray spectrometer was coupled with an ultrafast x-ray streak camera to produce time-resolved line shape spectra measured from hot, solid-density plasmas. A Bragg crystal was placed near laser-produced plasma to maximize throughput;

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc53f46abfcc8f893bd1df0ec73c2c9b
https://pubmed.ncbi.nlm.nih.gov/36319349

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Study of Stark broadening of krypton helium-β lines and estimation of electron density and temperature in NIF compressed capsules

Autor: K W Hill, L Gao, B F Kraus, M Bitter, P C Efthimion, N Pablant, M B Schneider, D B Thorn, H Chen, R L Kauffman, D A Liedahl, M J MacDonald, A G MacPhee, H A Scott, S Stoupin, R Doron, E Stambulchik, Y Maron, B Lahmann

Publikováno v: Plasma Physics and Controlled Fusion. 64:105025

The National Ignition Facility (NIF) diagnostic instrument manipulator (DIM) - based high resolution (dHIRES) x-ray spectrometer was used to measure the time evolution of the electron density (n e) and temperature (T e) in the hot spot of four NIF co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::84e2868f573b5f4ede1b4ea57dd07d0b
https://doi.org/10.1088/1361-6587/ac9017

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Hot Spot Evolution Measured by High-Resolution X-Ray Spectroscopy at the National Ignition Facility

Publikováno v: Physical review letters. 128(18)

Evolution of the hot spot plasma conditions was measured using high-resolution x-ray spectroscopy at the National Ignition Facility. The capsules were filled with DD gas with trace levels of Kr and had either a high-density-carbon (HDC) ablator or a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e122887ede15375575a10abd6500c51a
https://pubmed.ncbi.nlm.nih.gov/35594117

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