Using a dense plasma focus device with a 50 kJ capacitor charge, we have observed fusion reactions from deuterium ions with record energies of >150 keV, which are confined for durations of 7–30 ns in the cores of plasmoids with typical radii of 300–500 μm and densities ∼3 × 1019 cm−3. We have for the first time simultaneously imaged the plasmoid at high (30 μm) resolution and measured trapped ion energy and neutron anisotropy. The isotropy of the neutron emission as well as other observations confirms that the observed neutrons per pulse of up to 1.5 × 1011 are produced mainly by confined ions, not an unconfined beam. The conditions achieved are of interest for aneutronic fusion, such as with pB11 fuel.
REFERENCES
1.
F.
Castillo Mejla
, M.
Milanese
, R.
Moroso
, and J.
Pouzo
, J. Phys. D: Appl. Phys.
30
, 1499
(1997
).2.
V.
Nardi
, W. H.
Bostick
, J.
Feugeas
, and W.
Prior
, Phys. Rev. A
22
, 2211
(1980
).3.
K. N.
Koshelev
, V. I.
Krauz
, N. G.
Reshetniak
, R. G.
Salukvadze
, Yu. V.
Sidelnikov
, and E.
Yu Khautiev
, J. Phys. D: Appl. Phys.
21
, 1827
(1988
).4.
W. H.
Bostick
, V.
Nardi
, and W.
Pryor
, J. Plasma Phys.
8
, 7
(1973
).5.
M.
Sadowski
, H.
Herold
, H.
Schmidt
, and M.
Shakhatre
, Phys. Lett. A
105
, 117
(1984
).6.
W. H.
Bostick
, V.
Nardi
, and W.
Prior
, Ann. N.Y. Acad. Sci.
251
, 2
(1975
).7.
J. S.
Brzosko
and V.
Nardi
, Phys. Lett. A
, 155
, 162
(1991
).8.
P.
Kubes
, J.
Kravarik
, D.
Klir
, K.
Rezac
, M.
Scholz
, M.
Paduch
, I.
Ivanova-Stanik
, L.
Karpinski
, K.
Tomaszewski
, and J. M.
Sadowski
, IEEE Trans. Plasma Sci.
39
, 562
(2011
).9.
C. R.
Haas
, G.
Herziger
, R.
Lebert
, and R.
Noll
, in Proceedings of 3rd International Workshop on Plasma Focus
(Institut für Plasmaforschung - Universität Stuttgart, Stuttgart, Germany, 1983
), p. 87
.10.
G.
Herziger
, R.
Noll
, K.
Ruehl
, K.
Schmitt
, L.
Michel
, and H.
Krompholz
, in Proceedings of International Conference on Plasma Physics
, 2–3 July 1984
(Ecole polytechnique federal de Lausanne
, Lausanne
, 1984
), p. 31
.11.
H.
Schmidt
, in Proceedings of 3rd International Workshop on Plasma Focus
(Institut für Plasmaforschung - Universität Stuttgart, Stuttgart, Germany, 1983
), pp. 63
–66
.12.
K. N.
Koshelev
, G.
Salukvadze
, Yu V.
Sidelnikov
, and E.
Yu Khautiev
, J. Phys. D
21
, 1827
(1988
).13.
L.
Bertalot
, R.
Deutsch
, H.
Herold
, U.
Jager
, H. J.
Kaeppeler
, A.
Mozer
, T.
Oppenlander
, R.
Ruckle
, M.
Sadowski
, P.
Schilling
, and H.
Schmidt
, “Experiments on plasma focus dynamics, neutron production and ion emission
,” in IAEA Plasma Physics and Controlled Nuclear Fusion, International Conference
, Brussels, 1–10 July 1980
(IAEA
, Vienna
, 1980
), p. 177
.14.
J. S.
Brzosko
, V.
Nardi
, J. R.
Brzosko
, and D.
Goldstein
, Phys. Lett. A
192
, 250
(1994
).15.
J. S.
Brzosko
, J. R.
Brzosko
, B. V.
Robouch
, and Luigi
Ingrosso
, Phys. Plasmas
2
, 1259
(1995
).16.
17.
I. V.
Volobuev
, V. A.
Gribkov
, D.
Denus
, N. V.
Kalachev
, T. A.
Kolzlova
, O. N.
Krokhin
, S.
Sledziński
, S. A.
Startsev
, and S.
Czekaj
, Sov. J. Plasma Phys.
14
, 401
(1988
).18.
K.
Hirano
, K.
Shimoda
, T.
Yamamoto
, M.
Sato
, K.
Kobayashi
, and H.
Misaizu
, in Proceedings of 11th Europe Conference Controlled Fusion and Plasma Physics
, Aachen, 5–9 September 1983
(European Physics Society
, Geneva
, 1983
), Vol. 1
, p. 551
.19.
L.
Jakubowski
, M.
Sadowski
, and J.
Zebrowksi
, Nucl. Fusion
41
, 755
(2001
).20.
L.
Bertalot
, H.
Herold
, U.
Jäger
, A.
Mozer
, T.
Oppenländer
, M.
Sadowski
, and H.
Schmidt
, Phys. Lett A
79
, 389
(1980
).21.
E. J.
Lerner
, Laser Part. Beams
4
(2
), 193
(1986
).22.
E. J.
Lerner
and A. L.
Peratt
, Final Report, Jet Propulsion Laboratory contract No. 959962, 1995
.23.
E. J.
Lerner
, in Current Trends in International Fusion Research—Proceedings of the Fifth Symposium
, edited by E.
Panarella
, NRC (Research Press, National Research Council of Canada
, Ottawa, ON K1A 0R6 Canada
, 2007
).24.
Method and apparatus for producing x-rays, ion beams and nuclear fusion energy, U.S. patent 7,482,607 (
2009
).25.
E. J.
Lerner
and R. E.
Terry
, Current Trends in International Fusion Research—Proceedings of the Sixth Symposium, (National Research Council of Canada
, 2009
), p. 11
.26.
E. J.
Lerner
, S. K.
Murali
, and A.
Haboub
, J. Fusion Energy
30
, 367
(2011
).27.
F. J.
Goldin
, B. T.
Meehan
, E. C.
Hagen
, and P. R.
Wilkins
, Rev. Sci. Instrum.
81
, 10E531
(2010
).28.
S. P.
Bogdanov
and V. I.
Volosov
, “Recent advances in plasma diagnostics
,” in Corpuscular, Correlation, Bolometric, and Other Techniques
, edited by V. T.
Tolok
(Consultants Bureau
, New York
, 1971
), Vol. 3
, p. 1
.29.
M. M.
Milanese
and J. O.
Pouzo
, Nucl. Fusion
18
, 533
(1978
).30.
E. J.
Lerner
, S.
Krupakar Murali
, A.
Blake
, D.
Shannon
, and F.
Van Roessel
, “Fusion reaction scaling in a mega-amp dense plasma focus,” Nucleonika (submitted).31.
H. R.
Yousefi
, T.
Haruki
, J. I.
Sakai
, A.
Lumanta
, and K.
Masugata
, Phys. Lett. A
373
, 2360
(2009
).© 2012 American Institute of Physics.
2012
American Institute of Physics
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