scholarly journals Investigation of high X-ray conversion efficiency Kr filled gas sources at the National Ignition Facility

2019 ◽  
Vol 26 (6) ◽  
pp. 063105 ◽  
Author(s):  
M. J. May ◽  
G. E. Kemp ◽  
J. D. Colvin ◽  
D. A. Liedahl ◽  
P. L. Poole ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
National Ignition Facility ◽  
X Ray

scholarly journals High-energy (>70 keV) x-ray conversion efficiency measurement on the ARC laser at the National Ignition Facility

2017 ◽  
Vol 24 (3) ◽  
pp. 033112 ◽  
Author(s):  
Hui Chen ◽  
M. R. Hermann ◽  
D. H. Kalantar ◽  
D. A. Martinez ◽  
P. Di Nicola ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
High Energy ◽  
Efficiency Measurement ◽  
National Ignition Facility ◽  
X Ray

Simulation study of 3–5 keV x-ray conversion efficiency from Ar K-shell vs. Ag L-shell targets on the National Ignition Facility laser

2015 ◽  
Vol 22 (5) ◽  
pp. 053110 ◽  
Author(s):  
G. E. Kemp ◽  
J. D. Colvin ◽  
K. B. Fournier ◽  
M. J. May ◽  
M. A. Barrios ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
Simulation Study ◽  
National Ignition Facility ◽  
X Ray

scholarly journals X-ray conversion efficiency in vacuum hohlraum experiments at the National Ignition Facility

2012 ◽  
Vol 19 (5) ◽  
pp. 053301 ◽  
Author(s):  
R. E. Olson ◽  
L. J. Suter ◽  
J. L. Kline ◽  
D. A. Callahan ◽  
M. D. Rosen ◽  
...  
Keyword(s):  
Conversion Efficiency ◽  
National Ignition Facility ◽  
X Ray

scholarly journals Multi-keV x-ray source development experiments on the National Ignition Facility

2010 ◽  
Vol 17 (8) ◽  
pp. 082701 ◽  
Author(s):  
K. B. Fournier ◽  
M. J. May ◽  
J. D. Colvin ◽  
J. O. Kane ◽  
M. Schneider ◽  
...  
Keyword(s):  
National Ignition Facility ◽  
X Ray

Studying the energy dependence of intrinsic conversion efficiency of single crystal scintillators under X-ray excitation

2014 ◽  
Vol 116 (5) ◽  
pp. 743-747 ◽  
Author(s):  
N. Kalyvas ◽  
I. Valais ◽  
S. David ◽  
Ch. Michail ◽  
G. Fountos ◽  
...  
Keyword(s):  
Single Crystal ◽  
Energy Dependence ◽  
Conversion Efficiency ◽  
X Ray

scholarly journals Capsule design for the National Ignition Facility

1999 ◽  
Vol 17 (2) ◽  
pp. 217-224 ◽  
Author(s):  
T.R. DITTRICH ◽  
S.W. HAAN ◽  
M.M. MARINAK ◽  
D.E. HINKEL ◽  
S.M. POLLAINE ◽  
...  
Keyword(s):  
Dopant Concentration ◽  
Three Dimensions ◽  
Initial Surface ◽  
National Ignition Facility ◽  
X Ray ◽  
Ongoing Effort ◽  
Surface Finishes ◽  
Material Homogeneity ◽  
Indirect Drive ◽  
Reduced Scale

Several choices exist in the design and production of capsules intended to ignite and propagate fusion burn of the deuterium–tritium (D–T) fuel when imploded by indirect drive at the National Ignition Facility (NIF). These choices include ablator material, ablator dopant concentration and distribution, capsule dimensions, and X-ray drive profile (shock timings and strengths). The choice of ablator material must also include fabrication and material characteristics, such as attainable surface finishes, permeability, strength, transparency to radio frequency and infrared radiation, thermal conductivity, and material homogeneity. Understanding the advantages and/or limitations of these choices is an ongoing effort for LLNL and LANL designers. At this time, simulations in one-, two-, and three-dimensions show that capsules with either a copper-doped beryllium or a polyimide (C22H10N2O4) ablator material have both the least sensitivity to initial surface roughnesses and favorable fabrication qualities. Simulations also indicate the existence of capsule designs based on these ablator materials which ignite and burn when imploded by less than nominal laser performance (900-kJ energy, 250-TW power, producing 250-eV peak radiation temperature). We will describe and compare these reduced-scale capsules, in addition to several designs which use the expected 300-eV peak X-ray drive obtained from operating the NIF laser at 1.3 MJ and 500 TW.

scholarly journals Bremsstrahlung x-ray generation for high optical depth radiography applications on the National Ignition Facility

2018 ◽  
Vol 89 (10) ◽  
pp. 10G121 ◽  
Author(s):  
C. M. Huntington ◽  
J. M. McNaney ◽  
E. Gumbrell ◽  
A. Krygier ◽  
C. Wehrenberg ◽  
...  
Keyword(s):  
Optical Depth ◽  
National Ignition Facility ◽  
X Ray

scholarly journals Conversion efficiency of multi-keV L-shell-band X-ray emission

2021 ◽  
Author(s):  
wang ruirong ◽  
An honghai ◽  
Xie zhiyong ◽  
Wang wei
Keyword(s):  
Conversion Efficiency ◽  
X Ray
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