Dense plasmas research in the Chilean Nuclear Energy Commission: past, present and future

Soto, Leopoldo; Silva, Patricio; Moreno, José; Zambra, Marcelo; Sylvester, Gustavo; Esaulov, A. A.; Altamirano, Luis

doi:10.1590/s0103-97332002000100025

Cited by 4 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pioneering work in the miniaturization of plasma focus devices has been done by the plasma physics group at the Chilean Nuclear Energy Commission (CCHEN). [3][4][5][6][7] This renewed interest is motivated, among others, by the technological perspective of using the PF as a compact, transportable, and intense source of pulsed fast neutrons. 8 The strategy included constructing low energy generators to produce high currents by using low inductance designing concepts and low capacitance capacitor banks.…”

Section: Introductionmentioning

confidence: 99%

Statistical characterization of the reproducibility of neutron emission of small plasma focus devices

Tarifeño-Saldivia

Soto

2012

Physics of Plasmas

Self Cite

View full text Add to dashboard Cite

The purpose of this work is to discuss the techniques related to the detection of fast pulsed neutrons produced in plasma focus (PF) devices, the statistical analysis of the corresponding data, and the methodologies for evaluation of the device performance in low emission neutron sources. A general mathematical framework is presented for the assessment of the reproducibility of the neutron emission of small PF devices given the shot-to-shot distribution and detector efficiency. The effect on the reproducibility in case of using two independent detectors is also discussed. The analysis is applied to the neutron emission of the plasma focus device PF-50J operating in repetitive mode (0.1-0.5 Hz and 65 J bank energy). V C 2012 American Institute of Physics. [http://dx. FIG. 3. Comparison of the rate of increasing of the reproducibility due to the use of two independent similar detectors. For this case, q eq ¼ q 2 .

show abstract

Section: Introductionmentioning

confidence: 99%

Statistical characterization of the reproducibility of neutron emission of small plasma focus devices

Tarifeño-Saldivia

Soto

2012

Physics of Plasmas

Self Cite

View full text Add to dashboard Cite

show abstract

“…A closed zero-D model would be a useful tool to assist in the design of experimental conditions and electrode configurations. Experiments operating at mega-Ampere currents are being planned to be performed using the SPEED 2 device [15,16] (now at the Comisio´n Chilena de Energı´a Nuclear, Chile) with a double column preionization scheme [8], where enhanced stability and compression have been observed in contrast with conventional pre-ionization schemes [9,10].…”

Section: Discussionmentioning

confidence: 99%

Evolution of a Gas Embedded Z-pinch: A Quasi Static Zero Dimensional Approach

Soto

Clausse

2003

Phys. Scr.

Self Cite

View full text Add to dashboard Cite

In gas-embedded Z pinches, high electric discharges are induced in dense gases at atmospheric range pressures. An intriguing phenomenon observed in experiments conducted under these conditions is the radial expansion of the pinch. In this article, a model of Z pinch is derived, which succeeds in explaining expansive Z pinches in terms of variations of the number of particles confined by the pinch. The model is compared with experimental results showing excellent agreement.

show abstract

“…Despite the fact that the copper contamination reduces the neutron yield due to a bad breakdown environment, or the large copper deposition increases the current partition, which in turn reduces the available current during the pinch phase leading to a decrease in neutron yield, it seems to improve the breakdown conditions [7]. The experimental experience shows that tens of primary shots are necessary to have a PF device in a regular regime [1], [2], [6], [12].…”

Section: (B) and (C) Craters Of Different Depths [Fig 5(c) And (D)]mentioning

confidence: 99%

Ferroelectric Thick Film in an Insulator of a Low-Energy Plasma Focus

Sylvester

Zambra

Silva

et al. 2006

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

The electric breakdown along the insulator in a plasma focus (PF) device is fundamental for the formation of a homogeneous and symmetric current sheath. From this point of view, the primary electron emission is essential to set the appropriate initial conditions. In this paper, the authors study the effect and viability of an unpolarized ferroelectric lead germanate Pb 5 Ge 3 O 11 thick film covering the alumina insulator of a 400-J Mather-type PF device on the plasma formation and evolution during the discharge in the PF mode. For over several hundreds of electrical discharges, different insulators covered with the lead-germanate films showed a good mechanical and electric performance. The electrical diagnostic signals are highly reproducible, shot to shot, with a clear definition of the plasma pinch on the axis of discharge.Index Terms-Ferroelectric electron emission, ferroelectric insulator, lead germanate, plasma focus (PF).

show abstract

Dense plasmas research in the Chilean Nuclear Energy Commission: past, present and future

Cited by 4 publications

References 27 publications

Statistical characterization of the reproducibility of neutron emission of small plasma focus devices

Statistical characterization of the reproducibility of neutron emission of small plasma focus devices

Evolution of a Gas Embedded Z-pinch: A Quasi Static Zero Dimensional Approach

Ferroelectric Thick Film in an Insulator of a Low-Energy Plasma Focus

Contact Info

Product

Resources

About