Formation of hot spots in the plasma of a Z-pinch produced from low-density deuterated polyethylene

Akunets, A. A.; Anan’ev, S. S.; Bakshaev, Yu. L.; Blinov, P. I.; Bryzgunov, V. A.; Vikhrev, V. V.; Volobuev, I. V.; Dan’ko, S. A.; Zelenin, A. A.; Казаков, Е. Д.; Korolev, V. D.; Meshcherov, B. R.; Nedoseev, S. L.; Пименов, В. Г.; Смирнова, Е. А.; Ustroev, G. I.; Chernenko, A. S.; Shchagin, V. A.

doi:10.1134/s1063780x10080064

Cited by 9 publications

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“…In this work, which logically continues our previous experiments [3][4][5][6], we study the formation of high-temperature plasma in a Z-pinch made of deuterated microporous polyethylene at higher currents of about 2.5-3.5 MA on the Angara 5-1 facility. …”

Section: Introductionsupporting

confidence: 57%

“…Note that two HXR pulses are usually detected. The first HXR pulse with photon energies of Е > 100 keV is associated with electron leakages in the magnetically insulated transmission lines of the facility, while the second pulse occurs simultaneously with the SXR and neutron pulses [5]. Data on the first HXR pulse are not presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The total neutron flux emitted by the hot plasma produced in the neck was measured with an activation detector in which a 6.5-cm-diameter 11-cm-long Plexiglas container was used as a neutron (1) grazing incidence spectrograph (Δλ = 10−400 Å); (2,5,9) scintillation detectors placed along the load axis above the anode, perpendicular to the load axis, and along the load axis under the cathode, respectively; (3) vacuum photoemissive X-ray detectors (photon energy ranges of E > 100, 170, and 750 eV); (4) outputs of emission to the streak cameras oriented along and perpendicular to the load axis; (6) load; (7) modules of the Angara 5-1 facility; (8) three-frame X-ray image tube (photon energy ranges of E > 30, 120, and 600 eV); (10) three-channel X-ray pinhole camera (photon energy ranges of E > 10, 120, and 600 eV); (11) activation detector; (12) concrete protection; (J) detector of the current time derivative; and (U) voltage detector. moderator.…”

Section: Experimental Setup and Diagnostic Techniquesmentioning

confidence: 99%

“…In those experiments, the maximum neutron yield was 10 8 neutrons/shot. A considerable increase in the neutron yield (up to 6 × 10 9 neutrons/shot) was achieved when composite loads with a central neck made of microporous deuterated polyethylene with a density of 100 mg/cm 3 began to be used [5,6]. In those experiments, hot spots (HSs) with a lifetime of 4 ns and dimensions of ≥50 μm in the photon energy range of E > 2 keV were observed.…”

Section: Introductionmentioning

confidence: 99%

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Measurements of the parameters of a condensed deuterated Z-pinch on the angara-5-1 facility

et al. 2016

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Results are presented from measurements of the parameters of high-temperature plasma in the Z-pinch neck formed when a current of up to 3.5 MA flows through a low-density polymer load. To enhance the effect of energy concentration, a deuterated microporous polyethylene neck with a mass density of 100 mg/cm 3 and diameter of 1-1.3 mm was placed in the central part of the load. During the discharge current pulse, short-lived local hot plasma spots with typical dimensions of about 200-300 μm formed in the neck region. Their formation was accompanied by the generation of soft X-ray pulses with photon energies of E > 0.8 keV and durations of 3-4 ns. The plasma electron temperature in the vicinity of the hot spot was measured from the vacuum UV emission spectra of the iron diagnostic admixture and was found to be about 200-400 eV. The appearance of hot plasma spots was also accompanied by neutron emission with the maximum yield of 3 × 10 10 neutrons/shot. The neutron energy spectra were studied by means of the time-of-flight method and were found to be anisotropic with respect to the direction of the discharge current.

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Section: Introductionsupporting

confidence: 57%

Section: Resultsmentioning

confidence: 99%

Section: Experimental Setup and Diagnostic Techniquesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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