Hot-spots in plasma-focus discharges as intense sources of different radiation pulses

Jakubowski, L.; Sadowski, M.

doi:10.1590/s0103-97332002000100031

Cited by 32 publications

(18 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This effect requires further studies. Usually, when several hot-spots appear, the sets of the time-resolved signals from a magnetic analyzer show the multi-peak structure [5].…”

Section: Analysis Of Experimental Resultsmentioning

confidence: 99%

“…The third system was a multi-channel head designed especially for the application of diamond and rutile radiators of relatively large (10 mm) diameters [10]. Time-resolved measurements of the axial e-beams (within selected energy ranges) were performed by means of miniature scintillation detectors, which were installed in the chosen points of an image plane of the magnetic analyzer described above [5]. Time-integrated measurements of X-rays were carried out with pinhole cameras equipped with X-ray films.…”

Section: Experimental Setup and Diagnostic Equipmentmentioning

confidence: 99%

“…Different time-integrated and time-resolved measurements of e-beams and X-ray pulses, as emitted from the investigated PF devices, were performed to study properties of dense magnetized plasmas. Experimental data, and in particular emission characteristics of the e-beams and X-rays, as well as the correlation of the electron and X-ray pulses with other PF phenomena, have been reported in several papers [1]- [5]. Studies of the pulsed e-beams and X-rays are needed not only for the explanation of physical phenomena, which are responsible for the generation and acceleration of charged particles and the emission of electromagnetic radiation pulses, but also for application oriented research.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Studies of electron beams and X-Rays within different plasma-focus devices

2004

Self Cite

View full text Add to dashboard Cite

The paper presents a summary of investigations, which were performed with two mediumsize Plasma-Focus (PF) facilities, operated at IPJ in Swierk, Poland, during the recent few years. Attention is paid to experiments performed with MAJA-PF and PF-360 devices, which were run within the energy range from 37 kJ to 170 kJ. To analyze the emitted electron beams (e-beams) and X-rays, the use was made of different time-integrated and time-resolved diagnostic techniques, e.g. Cerenkov detectors, magnetic analyzers, vacuum X-ray pinhole cameras and scintillation detectors. A qualitative and quantitative analysis of the obtained results has been performed. The correlation of relativistic e-beams and X-ray pulses with other PF phenomena has also been discussed.

show abstract

“…This effect requires further studies. Usually, when several hot-spots appear, the sets of the time-resolved signals from a magnetic analyzer show the multi-peak structure [5].…”

Section: Analysis Of Experimental Resultsmentioning

confidence: 99%

Section: Experimental Setup and Diagnostic Equipmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Studies of electron beams and X-Rays within different plasma-focus devices

2004

Self Cite

View full text Add to dashboard Cite

show abstract

“…Experimental research on X-rays and electron beams, as well as ion beams and fusion products that are emitted from PF-type discharges has been carried out with different PF facilities in various laboratories for many years [1][2][3][4][5][6][7][8], but there are still some unsolved questions concerning mechanisms and characteristics of these electromagnetic and corpuscular emissions.…”

Section: Introductionmentioning

confidence: 99%

“…One of possible explanations is a hypothesis that some electrons are accelerated inside miniature plasma diodes, which can be formed due to magnetohydrodynamic (MHD) instabilities of current fi laments observed in PF discharges, and particularly inside pinch columns [1,4]. This hypothesis has been partially confi rmed by experimental observations of current fi laments and Measurements of fast electron beams and soft X-ray emission from plasma-focus experiments so-called hot spots (i.e., microregions of an increased X-ray emission) observed on soft X-ray pinhole images, but there is no theoretical model that might be used to compute dimensions and characteristics of such fi laments and hot spots [9,10].…”

Section: Introductionmentioning

confidence: 99%

Measurements of fast electron beams and soft X-ray emission from plasma-focus experiments

et al. 2016

View full text Add to dashboard Cite

Abstract. The paper reports results of the recent experimental studies of pulsed electron beams and soft X-rays in plasma-focus (PF) experiments carried out within a modifi ed PF-360U facility at the NCBJ, Poland. Particular attention was focused on time-resolved measurements of the fast electron beams by means of two different magnetic analyzers, which could record electrons of energy ranging from about 41 keV to about 715 keV in several (6 or 8) measuring channels. For discharges performed with the pure deuterium fi lling, many strong electron signals were recorded in all the measuring channels. Those signals were well correlated with the fi rst hard X-ray pulse detected by an external scintillation neutron-counter. In some of the analyzer channels, electron spikes (lasting about dozens of nanoseconds) and appearing in different instants after the current peculiarity (so-called current dip) were also recorded. For several discharges, fast ion beams, which were emitted along the z-axis and recorded with nuclear track detectors, were also investigated. Those measurements confi rmed a multibeam character of the ion emission. The time-integrated soft X-ray images, which were taken side-on by means of a pinhole camera and sensitive X-ray fi lms, showed the appearance of some fi lamentary structures and so-called hot spots. The application of small amounts of admixtures of different heavy noble gases, i.e. of argon (4.8% volumetric), krypton (1.6% volumetric), or xenon (0.8% volumetric), decreased intensity of the recorded electron beams, but increased intensity of the soft X-ray emission and showed more distinct and numerous hot spots. The recorded electron spikes have been explained as signals produced by quasi-mono-energetic microbeams emitted from tiny sources (probably plasma diodes), which can be formed near the observed hot spots.

show abstract

Temporal characteristics of electron beams from plasma-focus and their correlation with highly-ionized Ar-lines

2004

Self Cite

View full text Add to dashboard Cite

The paper reports on studies of pulsed electron beams measured along and perpendicularly to the z-axis, as well as other characteristics of plasma-focus discharges. Studies of highly-ionized argon-lines, as measured with temporal-resolution, are also presented. It has been found that the emission of highly ionized argon lines is well correlated with the electron beams and the appearance of successive hot-spots.

show abstract

Hot-spots in plasma-focus discharges as intense sources of different radiation pulses

Cited by 32 publications

References 0 publications

Studies of electron beams and X-Rays within different plasma-focus devices

Studies of electron beams and X-Rays within different plasma-focus devices

Measurements of fast electron beams and soft X-ray emission from plasma-focus experiments

Temporal characteristics of electron beams from plasma-focus and their correlation with highly-ionized Ar-lines

Contact Info

Product

Resources

About