Efficient generation of fast neutrons by magnetized deuterons in an optimized deuterium gas-puff z-pinch

D. Klir, A. V. Shishlov, V. A. Kokshenev, P. Kubes, A. Yu Labetsky, K. Rezac, R. K. Cherdizov, J. Cikhardt, B. Cikhardtova, G. N. Dudkin, F. I. Fursov, A. A. Garapatsky, B. M. Kovalchuk, J. Kravarik, N. E. Kurmaev, H. Orcikova, V. N. Padalko, N. A. Ratakhin, O. Sila, K. TurekV. A. Varlachev

Research output: Contribution to journalArticle

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Abstract

Z-pinch experiments with deuterium gas puffs have been carried out on the GIT-12 generator at 3 MA currents. Recently, a novel configuration of a deuterium gas-puff z-pinch was used to accelerate deuterons and to generate fast neutrons. In order to form a homogeneous, uniformly conducting layer at a large initial radius, an inner deuterium gas puff was surrounded by an outer hollow cylindrical plasma shell. The plasma shell consisting of hydrogen and carbon ions was formed at the diameter of 350 mm by 48 plasma guns. A linear mass of the plasma shell was about 5 μg cm<sup>-1</sup> whereas a total linear mass of deuterium gas in single or double shell gas puffs was about 100 μg cm<sup>-1</sup>. The implosion lasted 700 ns and seemed to be stable up to a 5 mm radius. During stagnation, m = 0 instabilities became more pronounced. When a disruption of necks occurred, the plasma impedance reached 0.4 Ω and high energy (>2 MeV) bremsstrahlung radiation together with high energy deuterons were produced. Maximum neutron energies of 33 MeV were observed by axial time-of-flight detectors. The observed neutron spectra could be explained by a suprathermal distribution of deuterons with a high energy tail f(E<inf>d</inf>) ∝ E<inf>d</inf><sup>-(1.8±0.2)</sup>. Neutron yields reached 3.6 × 10<sup>12</sup> at a 2.7 MA current. A high neutron production efficiency of 6 × 10<sup>7</sup> neutrons per one joule of plasma energy resulted from the generation of high energy deuterons and from their magnetization inside plasmas.

Original languageEnglish
Article number044005
JournalPlasma Physics and Controlled Fusion
Volume57
Issue number4
DOIs
Publication statusPublished - 1 Apr 2015

Fingerprint

fast neutrons
Deuterium
deuterons
deuterium
Neutrons
Plasmas
Gases
gases
neutrons
energy
Plasma guns
plasma guns
cylindrical plasmas
radii
neutron spectra
implosions
hydrogen ions
bremsstrahlung
hollow
Magnetization

Keywords

  • deuterium
  • fast neutrons
  • gas puff
  • plasma guns
  • z-pinch

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Nuclear Energy and Engineering

Cite this

Efficient generation of fast neutrons by magnetized deuterons in an optimized deuterium gas-puff z-pinch. / Klir, D.; Shishlov, A. V.; Kokshenev, V. A.; Kubes, P.; Labetsky, A. Yu; Rezac, K.; Cherdizov, R. K.; Cikhardt, J.; Cikhardtova, B.; Dudkin, G. N.; Fursov, F. I.; Garapatsky, A. A.; Kovalchuk, B. M.; Kravarik, J.; Kurmaev, N. E.; Orcikova, H.; Padalko, V. N.; Ratakhin, N. A.; Sila, O.; Turek, K.; Varlachev, V. A.

In: Plasma Physics and Controlled Fusion, Vol. 57, No. 4, 044005, 01.04.2015.

Research output: Contribution to journalArticle

Klir, D, Shishlov, AV, Kokshenev, VA, Kubes, P, Labetsky, AY, Rezac, K, Cherdizov, RK, Cikhardt, J, Cikhardtova, B, Dudkin, GN, Fursov, FI, Garapatsky, AA, Kovalchuk, BM, Kravarik, J, Kurmaev, NE, Orcikova, H, Padalko, VN, Ratakhin, NA, Sila, O, Turek, K & Varlachev, VA 2015, 'Efficient generation of fast neutrons by magnetized deuterons in an optimized deuterium gas-puff z-pinch', Plasma Physics and Controlled Fusion, vol. 57, no. 4, 044005. https://doi.org/10.1088/0741-3335/57/4/044005
Klir, D. ; Shishlov, A. V. ; Kokshenev, V. A. ; Kubes, P. ; Labetsky, A. Yu ; Rezac, K. ; Cherdizov, R. K. ; Cikhardt, J. ; Cikhardtova, B. ; Dudkin, G. N. ; Fursov, F. I. ; Garapatsky, A. A. ; Kovalchuk, B. M. ; Kravarik, J. ; Kurmaev, N. E. ; Orcikova, H. ; Padalko, V. N. ; Ratakhin, N. A. ; Sila, O. ; Turek, K. ; Varlachev, V. A. / Efficient generation of fast neutrons by magnetized deuterons in an optimized deuterium gas-puff z-pinch. In: Plasma Physics and Controlled Fusion. 2015 ; Vol. 57, No. 4.
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AU - Klir, D.

AU - Shishlov, A. V.

AU - Kokshenev, V. A.

AU - Kubes, P.

AU - Labetsky, A. Yu

AU - Rezac, K.

AU - Cherdizov, R. K.

AU - Cikhardt, J.

AU - Cikhardtova, B.

AU - Dudkin, G. N.

AU - Fursov, F. I.

AU - Garapatsky, A. A.

AU - Kovalchuk, B. M.

AU - Kravarik, J.

AU - Kurmaev, N. E.

AU - Orcikova, H.

AU - Padalko, V. N.

AU - Ratakhin, N. A.

AU - Sila, O.

AU - Turek, K.

AU - Varlachev, V. A.

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N2 - Z-pinch experiments with deuterium gas puffs have been carried out on the GIT-12 generator at 3 MA currents. Recently, a novel configuration of a deuterium gas-puff z-pinch was used to accelerate deuterons and to generate fast neutrons. In order to form a homogeneous, uniformly conducting layer at a large initial radius, an inner deuterium gas puff was surrounded by an outer hollow cylindrical plasma shell. The plasma shell consisting of hydrogen and carbon ions was formed at the diameter of 350 mm by 48 plasma guns. A linear mass of the plasma shell was about 5 μg cm-1 whereas a total linear mass of deuterium gas in single or double shell gas puffs was about 100 μg cm-1. The implosion lasted 700 ns and seemed to be stable up to a 5 mm radius. During stagnation, m = 0 instabilities became more pronounced. When a disruption of necks occurred, the plasma impedance reached 0.4 Ω and high energy (>2 MeV) bremsstrahlung radiation together with high energy deuterons were produced. Maximum neutron energies of 33 MeV were observed by axial time-of-flight detectors. The observed neutron spectra could be explained by a suprathermal distribution of deuterons with a high energy tail f(Ed) ∝ Ed-(1.8±0.2). Neutron yields reached 3.6 × 1012 at a 2.7 MA current. A high neutron production efficiency of 6 × 107 neutrons per one joule of plasma energy resulted from the generation of high energy deuterons and from their magnetization inside plasmas.

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KW - deuterium

KW - fast neutrons

KW - gas puff

KW - plasma guns

KW - z-pinch

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