Studies of the Hard X-ray Emission from the Filippov Type Plasma Focus Device, Dena

Tafreshi, M. A.; Saeedzadeh, E.

doi:10.1007/s10894-006-9018-5

Cited by 8 publications

(3 citation statements)

References 14 publications

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“…After the first electrical discharge (shot); due to bombarding anode surface with high-energy electrons, anode surface atoms are separated and enter the chamber. The gas pressure inside the chamber; due to anode material and pollutions of the chamber inner surface, increases in about 1 mbar [21,23,24]. Performing next electrical discharges, the pressure increase will be less.…”

Section: Preliminary Results Of the Uipff1mentioning

confidence: 99%

Design and Construction of a 20- KJ Filippov-Type Plasma Focus

Ghanei¹,

Abdi

Shirani³

2014

AJPA

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UIPFF1 is a new Filippov-type plasma focus facility, constructed and built in Esfahan University. This paper reports on the design of the UIPFF1. The main stages of the construction, design and the preliminary X-ray detection tests on the UIPFF1 are mentioned concisely. Measurement results show that in a typical discharge experiment, the discharge current =181 kA, period of current signal = 7.9 µs, the total inductance of the device =132 nH and electrical resistance of the circuit = 77 mΩ. The calibration factor is measured as 121 kA/V by averaging from data obtained with a set of 5 experiments. Temporal changes in plasma focus discharge current, confirmed occurrence pinch at a specific pressure of argon, neon and nitrogen gases.

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Section: Preliminary Results Of the Uipff1mentioning

confidence: 99%

Design and Construction of a 20- KJ Filippov-Type Plasma Focus

Ghanei¹,

Abdi

Shirani³

2014

AJPA

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“…There is an orifice in the center of this cover, with an aperture with a diameter of 20cm. This orifice is closed by a 5mm thick Aluminium target that has been placed in front of the anode surface at the distance of 12cm [6].Chamber volume is about 61000cm 3 . The DENA facility scheme, and a picture of this device are shown in Fig.…”

Section: Experimental Set-upmentioning

confidence: 99%

Study of dense plasma-surface interaction by a Filippov type plasma focus device

2008

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In this paper we have tried to investigate of dense plasma-material interaction in a Filippov type plasma focus (90KJ, 25KV, 288µf) facility. Dense plasma focus discharges are known as a remarkable source of hot plasma bunches and fast streams, fast neutrons, hard and soft X-rays, and energetic particles such as ions and electrons. The Aluminum made targets with 20cm in diameter and thickness 5mm, were placed at the central part of plasma focus cathode. These targets were exposed to perpendicular dense high temperature plasma stream incidence. The working gases for these experiments were Argon, Deuterium +Krypton, Helium, and pure Deuterium. We took advantage of changeable targets surface and used SEM technique for analyzing irradiated samples by various working gases. As it shown from SEM pictures and surface profiles, melt layer erosion by melt motion, surface smoothing, and bubble formation were some of different effects caused by diverse working conditions.

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“…Due to the special characters of the PF devices, they may have diverse applications, e.g. they can be used in the field of high energy and high density physics [1][2][3][4][5], fusion studies [5,6], neutron and x-ray production [7,8], biological studies [9][10][11] and industrial applications [12][13][14][15]. The characteristics and features of the PF devices and the large number of their possible applications, particularly in medicine and industry, make these systems attractive for further investigations.…”

Section: Introductionmentioning

confidence: 99%

An investigation of the plasma behaviour in a Filippov type plasma focus device

Mahabadi

Tafreshi

2007

Plasma Phys. Control. Fusion

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Plasma behaviour in the 90 kJ Filippov type plasma focus (PF) device Dena, is studied both experimentally and theoretically. The latest experimental data obtained by the use of the Dena facility are presented. Then the experimental data are compared with the simulated data obtained through the ML model. This study shows that the ML model, to a good extent, is capable of predicting the plasma behaviour in the Filippov type PF. The experimental and the theoretical results show that the increment of the discharge voltage leads to an almost linear decrement of the pinch time. It is also shown that the increment of the pressure leads to a decrement of the current sheath expansion velocity. Finally, a semiempirical method for determination of the permitted values of the current efficiency factor and the mass shedding factor is presented.

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Studies of the Hard X-ray Emission from the Filippov Type Plasma Focus Device, Dena

Cited by 8 publications

References 14 publications

Design and Construction of a 20- KJ Filippov-Type Plasma Focus

Design and Construction of a 20- KJ Filippov-Type Plasma Focus

Study of dense plasma-surface interaction by a Filippov type plasma focus device

An investigation of the plasma behaviour in a Filippov type plasma focus device

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