Operation of a plasma-filled diode

Baksht, R. B.; Buryak, I. A.; Petin, V. K.; Ratakhin, N. A.; Fedyunin, A. V.; Shishlov, A. V.

doi:10.1007/bf00559380

Cited by 3 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore the pre-ionization of the gas by some external source might be beneficial. This is shown in the papers of Stallings et al (1979), Ruden et al (1987), Baksht, Russkikh, and Fedyunin (1995), Baksht, Russkikh, and Chagin (1997), and Rousskikh et al (1999).…”

Section: A Breakdown Of Gas Puffsmentioning

confidence: 75%

“…The effect of the prepulse is determined by its time duration and its voltage. In particular, in Baksht, Russkikh, and Fedyunin (1995) the prepulse (1.5 s, 1 kV) did not cause a breakdown because the axial line density n 0 L Ͻ3.6ϫ10 15 cm Ϫ2 was well below the Paschen optimum for Ar. Such a prepulse would have caused a breakdown of Ar with a density an order of magnitude higher.…”

Section: A Breakdown Of Gas Puffsmentioning

confidence: 97%

See 1 more Smart Citation

The physics of fastZpinches

2000

View full text Add to dashboard Cite

show abstract

Section: A Breakdown Of Gas Puffsmentioning

confidence: 75%

Section: A Breakdown Of Gas Puffsmentioning

confidence: 97%

The physics of fastZpinches

2000

View full text Add to dashboard Cite

show abstract

“…(viii) Related to these ideas are nested loads, e.g. the double-puff Z-pinch load studied experimentally by Baksht et al [302]. Multiple shells were studied theoretically by Cochran et al [303].…”

Section: The Rayleigh-taylor Instabilitymentioning

confidence: 99%

A review of the denseZ-pinch

Haines

2011

Plasma Phys. Control. Fusion

391

184

View full text Add to dashboard Cite

The Z-pinch, perhaps the oldest subject in plasma physics, has achieved a remarkable renaissance in recent years, following a few decades of neglect due to its basically unstable MHD character. Using wire arrays, a significant transition at high wire number led to a great improvement in both compression and uniformity of the Z-pinch. Resulting from this the Z-accelerator at Sandia at 20 MA in 100 ns has produced a powerful, short pulse, soft x-ray source >230 TW for 4.5 ns) at a high efficiency of ∼15%. This has applications to inertial confinement fusion. Several hohlraum designs have been tested. The vacuum hohlraum has demonstrated the control of symmetry of irradiation on a capsule, while the dynamic hohlraum at a higher radiation temperature of 230 eV has compressed a capsule from 2 mm to 0.8 mm diameter with a neutron yield >3 × 10 11 thermal DD neutrons, a record for any capsule implosion. World record ion temperatures of >200 keV have recently been measured in a stainless-steel plasma designed for Kα emission at stagnation, due, it was predicted, to ion-viscous heating associated with the dissipation of fast-growing short wavelength nonlinear MHD instabilities. Direct fusion experiments using deuterium gas-puffs have yielded 3.9×10 13 neutrons with only 5% asymmetry, suggesting for the first time a mainly thermal source. The physics of wire-array implosions is a dominant theme. It is concerned with the transformation of wires to liquid-vapour expanding cores; then the generation of a surrounding plasma corona which carries most of the current, with inward flowing low magnetic Reynolds number jets correlated with axial instabilities on each wire; later an almost constant velocity, snowplough-like implosion occurs during which gaps appear in the cores, leading to stagnation on the axis, and the production of the main soft-x-ray pulse. These studies have been pursued also with smaller facilities in other laboratories around the world. At Imperial College, conical and radial wire arrays have led to highly collimated tungsten plasma jets with a Mach number of >20, allowing laboratory astrophysics experiments to be undertaken. These highlights will be underpinned in this review with the basic physics of Z-pinches including stability, kinetic effects, and finally its applications.

show abstract

“…To improve the quality of implosion, gas-puff loads with thicker shells were subsequently developed. Various methods such as puff-on-puff, inclusion of axial magnetic field, conducting outer shells, shear stabilization and spinning gas-puff have also been employed [10,[12][13][14][15] to curtail R-T instability development without degrading the final compression of the pinch plasma. In order to minimize the effect of the R-T instability on the implosion dynamics and to achieve the plasma parameters of interest, we have employed a theoretical model for a multicascade liner system and found that for an optimum value of the shell thickness the maximum number density of the order of 10 3 n 0 and temperature of the order of 36 keV are achievable [16].…”

Section: Introductionmentioning

confidence: 99%

Thermonuclear Fusion Conditions in an Impurity-Seeded Multicascade Liner Staged Z-Pinch

Mirza¹,

Deeba

2004

Phys. Scr.

View full text Add to dashboard Cite

We have determined the lifetimes of helium n 1 P states, from the shortest 2 1 P (560 ± 14 ps), up to the 10 1 P (59.8 ± 1.5 ns). The experiment was performed by measuring the time dependence of UV fluorescence after the resonant excitation of states with pulsed synchrotron light. The apparent lifetimes have been extrapolated to the zero gas pressure limit for each n. Cascade decays of the initially prepared states and the effect of periodic target excitation have been also considered. The results are compared with our MCHF calculations and with other theoretical and experimental values.

show abstract

Operation of a plasma-filled diode

Cited by 3 publications

References 2 publications

The physics of fastZpinches

The physics of fastZpinches

A review of the denseZ-pinch

Thermonuclear Fusion Conditions in an Impurity-Seeded Multicascade Liner Staged Z-Pinch

Contact Info

Product

Resources

About