Study of neutron emission in a low-energy plasma focus with  -source-assisted breakdown

Zakaullah, M.; Waheed, A.; Ahmad, Shamim; Zeb, Shaista; Hussain, Shafqat

doi:10.1088/0963-0252/12/3/320

Cited by 54 publications

(26 citation statements)

References 18 publications

(30 reference statements)

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“…Furthermore, material and shape of electrodes, proper selection of anode and insulator sleeve length, and preionization before initial discharge are considered to be important in symmetric development and acceleration of current sheath, in addition to normal operating conditions [13][14][15][16]. Hill and Hubbs [17] developed a PF, which was fired repeatedly without purging the test gas between the shots.…”

Section: Introductionmentioning

confidence: 99%

“…Fried et al [22] studied the neutron emission by injecting a pulsed relativistic electron beam into a PF device and reported that the neutron emission was increased five times the averaged value emitted without beam injection. The influence of a meshtype b-source 28 Ni 63 on neutron emission from two lowenergy (1.15 and 0.58 kJ) Mather-type PF was studied by Zakaullah et al [16]. The neutron emission was found to be increased upto 25 %.…”

Section: Introductionmentioning

confidence: 99%

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Correlation of Neutron and X-ray Emission from Plasma Focus with Pre-ionization

et al. 2014

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The effect of pre-ionization caused by depleted uranium ( 92 U 238 ) on the correlation of neutron and X-ray emission from 1.8 kJ plasma focus is investigated by employing photomultiplier tubes (XP2020) coupled with fast (50 9 50) mm 2 cylindrical plastic scintillators (NE102A) along with GM tube and Quantrad Si PIN diodes with a pair of appropriate filters. It is found that neutron and Cu-K a emission along with total X-ray yield are significantly increases with pre-ionization as compared to those without pre-ionization. Moreover, pre-ionization improves the shot to shot reproducibility of the system and broadens the operating pressure regime both for neutron and X-ray emission.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Correlation of Neutron and X-ray Emission from Plasma Focus with Pre-ionization

et al. 2014

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“…An extensive study has been done by several authors in the field of axial PCS dynamics which depends on several macroscopic parameters like the energy of capacitor bank, the discharge current, the charging voltage and the curvature of the PCS [5][6][7][8][9]. Also a drive parameter   p I a  , where I p is the peak discharge current, a is the inner electrode radius and ρ is the ambient gas density, has been derived previously to a plasma focus devices of different types [10][11][12][13] This parameter determines the speed of the PCS in both axial and radial phases and it has a constant value for Mather type of different aspect ratios, gas pressures and discharge current [11].…”

Section: Introductionmentioning

confidence: 99%

Plasma Current Sheath Motion in Coaxial Plasma Discharge

Allam¹,

El-Sayed²,

Soliman³

2011

EPE

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In this paper experiments and theoretical treatments [1] on 1.5 KJ coaxial plasma discharge device have been carried out to show, plasma current sheath, PCS, motion in coaxial plasma discharge by studying: the effect of nitrogen gas pressure in the range from 1 to 2.2 Torr and the axial position of PCS along the coaxial electrodes on the modification factor, actual drive parameter, PCS curvature and shape (thickness). Also the dynamics of PCS along the coaxial electrodes due to the combination effect of induced azimuthal and axial magnetic fields induction has been detected experimentally by using a magnetic probe technique.

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“…The plasma focus device [12,13] is a simple pulsed plasma accelerator that uses selfgenerated magnetic field to compress the gas to a high density (10 25 -10 26 m -3 ) and high temperature (1-2 keV) plasma for a short duration. It is a rich source of emitting the high energetic ions [14], X-rays [15], relativistic electrons [16,17] and neutrons [18]. The plasma focus device has many potential applications such as a soft X-ray source [19] for the next generation of microelectronics lithography, surface micromachining, pulsed X-ray and neutron source for medical and security inspection applications and material modification [20].…”

Section: Introductionmentioning

confidence: 99%

Deposition of Chromium Thin Films on Stainless Steel-304 Substrates Using a Low Energy Plasma Focus Device

et al. 2011

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In this paper, we study thin films of chromium deposited on stainless steel-304 substrates using a low energy (1.6 kJ) plasma focus device. The films of chromium are likewise deposited with 25 focus shots each at various axial distances from the top of the anode (3, 5, 7, 9 and 11 cm). We also consider different angular positions with respect to the anode axis (0°, 15°and 30°) at a distance of 5 cm from the anode tip to deposit the chromium films on the stainless steel substrates. To characterize the structural properties of the films, we benefit from X-ray diffraction (XRD) analysis. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) are applied as well to study the surface morphology of these deposited films. Furthermore, we make use of Vicker's micro-hardness measurements to investigate the mechanical properties of chromium thin films. The XRD results show that the degree of crystallinity of chromium thin films depends on the substrate axial and angular positions. The AFM images illustrate that the film deposited at the distance of 5 cm and the angular position of 0°has quite a uniform surface with homogeneous distribution of grains on the film surface. From the hardness results, we observe that the sample deposited at the axial distance of 5 cm from the anode tip and at the angle of 0°with respect to the anode axis, is harder than the other deposited films.

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Study of neutron emission in a low-energy plasma focus with -source-assisted breakdown

Cited by 54 publications

References 18 publications

Correlation of Neutron and X-ray Emission from Plasma Focus with Pre-ionization

Correlation of Neutron and X-ray Emission from Plasma Focus with Pre-ionization

Plasma Current Sheath Motion in Coaxial Plasma Discharge

Deposition of Chromium Thin Films on Stainless Steel-304 Substrates Using a Low Energy Plasma Focus Device

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