Zobrazeno 1 - 10
of 354
pro vyhledávání: '"K W Hill"'
Autor:
H. Sio, A. Krygier, D. G. Braun, R. E. Rudd, S. A. Bonev, F. Coppari, M. Millot, D. E. Fratanduono, N. Bhandarkar, M. Bitter, D. K. Bradley, P. C. Efthimion, J. H. Eggert, L. Gao, K. W. Hill, R. Hood, W. Hsing, N. Izumi, G. Kemp, B. Kozioziemski, O. L. Landen, K. Le Galloudec, T. E. Lockard, A. Mackinnon, J. M. McNaney, N. Ose, H.-S. Park, B. A. Remington, M. B. Schneider, S. Stoupin, D. B. Thorn, S. Vonhof, C. J. Wu, Y. Ping
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-8 (2023)
Abstract Large laser facilities have recently enabled material characterization at the pressures of Earth and Super-Earth cores. However, the temperature of the compressed materials has been largely unknown, or solely relied on models and simulations
Externí odkaz:
https://doaj.org/article/258382f7cab343e8ac2471967b385953
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
Autor:
N. A. Pablant, M. Bitter, L. Gao, M. Dozieres, P. C. Efthimion, G. Frisch, K. W. Hill, T. Hordin, B. Kozioziemski, A. Krygier, M. J. MacDonald, N. Ose, Y. Ping, D. Sagan, M. B. Schneider, H. Sio, S. Stoupin, Y. Yakusevitch
Publikováno v:
The Review of scientific instruments. 93(10)
A new class of crystal shapes has been developed for x-ray spectroscopy of point-like or small (a few mm) emission sources. These optics allow for dramatic improvement in both achievable energy resolution and total throughput of the spectrometer as c
Autor:
T. Barbui, O. Chellaï, L. F. Delgado-Aparicio, Y. Peysson, B. Stratton, R. Dumont, K. W. Hill, N. A. Pablant
Publikováno v:
The Review of scientific instruments. 93(10)
WEST (tungsten environment in steady-state tokamak) is starting operation for the first time with a water-cooled full tungsten divertor, enabling long pulse operation. Heating is provided by radiofrequency systems, including lower hybrid current driv
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;
Autor:
Yong Wang, J. Emig, R. Nedbailo, Brian Kraus, Manfred Bitter, K. W. Hill, Shoujun Wang, E. W. Magee, Huanyu Song, Vyacheslav N. Shlyaptsev, J. Clark, Jorge J. Rocca, Ronnie Shepherd, P. C. Efthimion, Lan Gao, Alexander Pukhov, Reed Hollinger
Publikováno v:
2021 IEEE International Conference on Plasma Science (ICOPS).
High resolution K-shell emission from Ni solid and near solid density nanowire arrays was measured at the ALEPH laser facility using a newly commissioned high resolution x-ray spectrometer. The spectrometer consists of a spherically bent Ge crystal c
Autor:
P. C. Efthimion, Manfred Bitter, Roberto Mancini, K. W. Hill, Shoujun Wang, Brian Kraus, Lan Gao, Thomas Gomez, Reed Hollinger, Jorge J. Rocca, A. Moreau, Huanyu Song
Publikováno v:
2021 IEEE International Conference on Plasma Science (ICOPS).
Ion-electron equilibration drives plasma dynamics but is challenging to model at high plasma densities, where thermalization is fast and correlation effects are significant. Experimental benchmarks in this regime have been rare due to a lack of preci
Autor:
Ronnie Shepherd, Yasmeen Musthafa, Huanyu Song, Kirk Flippo, Shoujun Wang, K. W. Hill, Amina Hussein, Jorge J. Rocca, M. H. Kabir, Brian Kraus, R. Nedbailo, Reed Hollinger, Stephanie Hansen, F. Dollar, V. Senthilkumaran, Lan Gao, N. F. Beier, H. Allison, P. C. Efthimion
Publikováno v:
2021 IEEE International Conference on Plasma Science (ICOPS).
We will discuss our recent work performing high-resolution (E/ΔE > 5000) X-ray spectroscopy of copper K-shell emission from high-intensity (I ∼10 21 W/cm 2 ) laser experiments using the ALEPH 400 nm laser at Colorado State University. Through meas
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
Autor:
Lan Gao, B. F. Kraus, K. W. Hill, M. B. Schneider, A. Christopherson, B. Bachmann, M. Bitter, P. Efthimion, N. Pablant, R. Betti, C. Thomas, D. Thorn, A. G. MacPhee, S. Khan, R. Kauffman, D. Liedahl, H. Chen, D. Bradley, J. Kilkenny, B. Lahmann, E. Stambulchik, Y. Maron
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