Producing Cryogenic Deuterium Targets for Experiments on OMEGA

Harding, D. R.; Sangster, T. C.; Meyerhofer, D. D.; McKenty, P. W.; Lund, L. D.; Elasky, L. M.; Wittman, Mark D.; Seka, W.; Loucks, S. J.; Janezic, R.; Hinterman, T. H.; Edgell, D. H.; Jacobs‐Perkins, D.; Gram, R. Q.

doi:10.13182/fst05-a1079

Cited by 19 publications

(11 citation statements)

References 12 publications

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“…16 The targets are deuterated polystyrene shells of 3 -10 m wall thickness suspended in a beryllium "C-mount" using four submicron threads of spider silk. 16 The targets are deuterated polystyrene shells of 3 -10 m wall thickness suspended in a beryllium "C-mount" using four submicron threads of spider silk.…”

Section: Cryogenic Target Fabrication With Si Barriersmentioning

confidence: 99%

Effectiveness of silicon as a laser shinethrough barrier for 351-nm light

et al. 2008

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Section: Cryogenic Target Fabrication With Si Barriersmentioning

confidence: 99%

Effectiveness of silicon as a laser shinethrough barrier for 351-nm light

et al. 2008

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“…One of these experiments dealing with deuterium cluster targets irradiated with 100 fs pulses, see Ma04 label, gave the dependence FIGURE 2 | Selected DD-fusion experiments associated with laser energy dependence of fusion neutron yields obeying the power law Q•E 1.65 , where Q SGG = 14 (short dash line), and Q BL = 2,000 (solid line), Q fs = 7.1 × 10 4 (dash-dot line) for explosions of deuterium clusters [2], Q fs = 4.1 × 10 5 (dash line) and Q fs = 7.5 × 10 6 (dot line). Data from References: Ma04 [2], Sy06 [10], Vo00 [13], Pr98 [17], Be06 [18], Iz02 [19], Fr02 [28], Zu13 [33], Di99 [34], V1 [25], V2 [26], V3 [27], PALS [20], Ω14 [22], Iskra5 [21], NIF-DD [23], Ω05 [31], Ω96 [14], SGII-Up [12], GXII [29], GXII95 [32], and SGIII15 [30]. [1,2].…”

Section: Regardless Of Inaccuracies In Total Neutron Yield Determinationmentioning

confidence: 99%

Scaling of Laser Fusion Experiments for DD-Neutron Yield

Krása

Klír

2020

Front. Phys.

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Yields of neutrons produced in various laser fusion experiments conducted in recent decades are compared with each other. It has surprisingly been found that there is a possibility to make an overall elucidation of the variance in the number of neutrons produced in the various experiments. The common method is based on definition of the energy conversion efficiency as a ratio between the energy carried out by neutrons produced through the fusion reaction and the input energy given by laser energy, E, focused on a target. The neutron-yield-laser-energy (Y-E) diagram is the basic chart used to interpret the spread of experimental data in terms of the experimental efficiency of the laser-matter interaction. Experiments carried out using a single laser system show that laser energy dependence of the yield can be well-characterized by a power law, Y = QE α , where Q is the parameter reflecting possible dependence on the pulse duration, laser intensity, laser contrast ratio, focal geometry, target structure, etc. [1, 2]. Sorting the values of the neutron yields obtained in various experiments shows that the power law Y = Q E 1.65 is suitable to determine lines in the Y-E diagram each of them, where the value of Q is associated with quality of experimental conditions [3]. This sorting shows the order-of-magnitude differences in yields found in various experiments, which can be characterized by the value of the parameter Q. Due to the easy feasibility and the large number of DD fusion experiments performed, the overall Y-E diagram gives a chance to identify suitable laser systems for effective DD fusion experiments. It can, therefore, be assumed that some of the conclusions of these experiments could also be applied to the experimental arrangement suitable for optimizing p 11 B fusion.

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“…Once the core material reaches 20 times the density of lead and a temperature of 100,000,000°C, a "spark" is generated at the "hot spot" to initiate the thermonuclear burn wave, propagating through the compressed DT fuel in a few tens of picoseconds and leading to significant energy gain. [20,21] The fabrication of cryogenic laser targets usually starts with the formation of low-density foam shells of high spherical symmetry. These foam shells are typically formed from DE droplets.…”

Section: Requirements On Double Emulsion Droplet Uniformity For Lasermentioning

confidence: 99%