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Generation of high-energy (>15 MeV) neutrons using short pulse high intensity lasers
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10.1063/1.4751460
/content/aip/journal/pop/19/9/10.1063/1.4751460
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/9/10.1063/1.4751460

Figures

Image of FIG. 1.
FIG. 1.

Concept for high-energy neutron production for the d-Li nuclear fusion reaction. Differential cross section for neutron production for incident deuteron energy MeV.

Image of FIG. 2.
FIG. 2.

Total neutron production cross section from p-Li (a),11,46–48 d-Li (b),45,49,63 and d-d (c)38,50–53 fusion reactions. The highlighted area indicates the yield from ions with high enough energy to produce 15 MeV neutrons.

Image of FIG. 3.
FIG. 3.

Neutron spectrum (neutron yield per incident ion per unit solid angle and per unit energy interval) in the direction of the ion beam produced by 21 MeV protons in p-Li (a), 8 MeV deuterons in d-Li (b), and 20 MeV deuterons in d-d (c) fusion reactions. The experimental data are from Ref. 61.

Image of FIG. 4.
FIG. 4.

Neutron spectrum in the direction of the deuteron beam produced in d-Li reactions by deuterons with energy of 4 MeV (a), 15 MeV (b), and 40 MeV (c). Shaded area: high-energy neutrons. The experimental data are from Refs. 65 and 66.

Image of FIG. 5.
FIG. 5.

Neutron spectrum in the direction of the deuteron beam produced in d-d reactions by deuterons with energy of 15 MeV (a), 20 MeV (b), and 30 MeV (c). Shaded area: high-energy neutrons.

Image of FIG. 6.
FIG. 6.

Yield of forward directed neutrons above 15 MeV versus incident ion energy.

Image of FIG. 7.
FIG. 7.

Experimental results from two shots on the Titan Laser with 360 J of laser energy in 9 ps. (a) the maximum neutron energy as determined from nTOF spectrometers at multiple angles and (b) spectrally integrated neutron fluence measured using CR-39.

Tables

Generic image for table
Table I.

Nuclear reactions and converters used for neutron production.

Generic image for table
Table II.

Conversion efficiency (per ion) into neutrons in the forward direction (θ = 0) for energy En > 15 MeV (second line) and all energies (third line) for the 7Li(d,n)8Be nuclear reaction. Bottom line: total number of deuterons required to generate 106 high-energy neutrons/sr.

Generic image for table
Table III.

Conversion efficiency (per ion) into neutrons in the forward direction (θ = 0) for energy En > 15 MeV (second line) and all energies (third line) for the d(d,n)3He nuclear reaction. Bottom line: total number of deuterons required to generate 106 high-energy neutrons/sr.

Generic image for table
Table IV.

Nuclear data (Q-value of the reaction in the center-of-mass system), ion beam requisite energy Ereq and minimum number , and pros and cons for high-energy neutron production using p-Li, d-Li, and d-d nuclear reactions.

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/content/aip/journal/pop/19/9/10.1063/1.4751460
2012-09-11
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Generation of high-energy (>15 MeV) neutrons using short pulse high intensity lasers
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/9/10.1063/1.4751460
10.1063/1.4751460
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