Surface modifications of fusion reactor relevant materials on exposure to fusion grade plasma in plasma focus device

Niranjan, Ram; Rout, R. K.; Srivastava, Rohit; Chakravarthy, Y.; Mishra, Prabhat; Kaushik, T. C.; Gupta, Satish C.

doi:10.1016/j.apsusc.2015.07.192

Cited by 25 publications

(5 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The tungsten and molybdenum samples were irradiated with deuterium plasma using a Mathertype plasma focus device PF-4 which is energetic 4 kJ, with a capacitor bank of 48 µF, maximum charge voltage to 20 kV, total inductance of 158 nH, and peak discharge current of 400 kA [11,26]. A schematic diagram of experiments of the PF-4 is shown in Figure 1a.…”

Section: Methodsmentioning

confidence: 99%

The INVESTIGATION OF RADIATION EFFECT ON TUNGSTEN AND MOLYBDENUM MATERIALS

Moldabekov

2023

ijmph

View full text Add to dashboard Cite

This work studied damage and erosion of the tungsten and molybdenum after exposure to deuterium ions of a Plasma focus device. The main purpose and idea of this research work was an experimental investigation of surface changes on the tungsten and molybdenum materials at deuterium optimal gas pressure in the chamber of a PF device. Before and after irradiation the sample surfaces were analyzed using SEM, AFM and an optical microscope. The analysis showed that the change in surface relieves 0.0377 -0,0125 µm, different types of damage on materials dependent on irradiation parameters. With increasing the 10-30 number of shots, the micro-cracks 74-172 nm, and radiation swelling for molybdenum, also the crater, bubbles, holes 64-453 nm and cavities on the tungsten sample surface were observed respectively. It is established that a noticeable erosion for tungsten up to Δm=-31 mg and molybdenum Δm=-43 mg samples as a result of irradiation with plasma flows simulating a stationary regime occurs only at relatively high sample surface temperatures.

show abstract

Section: Methodsmentioning

confidence: 99%

The INVESTIGATION OF RADIATION EFFECT ON TUNGSTEN AND MOLYBDENUM MATERIALS

Moldabekov

2023

ijmph

View full text Add to dashboard Cite

show abstract

“…It is a favorable source of soft/hard X-rays, neutrons, relativistic electrons and high energy ion beams over a broad energy spectrum [22,23]. These energetic ions have been used for various applications such as thin film deposition [24][25][26], ion implantation [27,28], surface modification [29] and thermal surface treatment [30]. The deposition process in PF device is done through heating, compressing and ionizing the filling gas to form plasma.…”

Section: Introductionmentioning

confidence: 99%

Growth, characterization, and investigation of H2 gas sensing performance of Al-doped ZnO thin films synthesized by plasma focus device

Hosseinnejad

Ghoranneviss

Hantehzadeh

et al. 2016

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

This paper reports characterization of Al-doped ZnO (AZO) thin films deposited on glass substrates at room temperature by a low energy (1.3 kJ) plasma focus device using a ZnO target with an Al content of 3wt%. A particular focus of investigation is on properties relevant to the usage of thin films as hydrogen gas sensors. Indeed, the dependence of angular position of substrate on structural, morphological and gas sensing properties of AZO thin films is investigated. The results obtained from X-ray diffraction (XRD) reveal that all the films are of polycrystalline zinc oxide in nature, possessing hexagonal wurtzite structure. Also XRD results indicate strong dependence of crystallinity of deposited thin films on angular position of samples. Scanning electron microscopy and atomic force microscopy results reveal the structure growth and enhancement of surface roughness with decreasing the angle with respect to anode axis. The experiments and measurements involving the AZO deposited thin films towards hydrogen were carried out at different operating temperatures within 150-400°C for various concentrations of hydrogen in air. The H 2 sensing response enhanced with concentration and operating temperature, and reached its maximum at 300°C to 1000 ppm concentration of hydrogen gas. The results also indicated shorter response times for samples deposited at larger angular positions.

show abstract

“…Finally, it is collapsed by un-stabilities forming the voltage works to accelerate the electron and ion beam in opposite directions. The emitted high-energy ion and electron beams from pinch plasma in a DPF have been used in different fields such as nano-material and device fabrication [7], thin film deposition [8], surface modification [9], thermal surface treatment [10], ion-assisted coating [11], ion implication, and production of short-lived radioisotopes [12] including plasma processing. Many efforts have been made in experimental studies of applications of fast ion and electron beams from various DPF devices [13].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Ion Beam for Various Gases in a Spherical Plasma Focus Device

Malek

2022

J. eng. adv.

View full text Add to dashboard Cite

This study presents the computed ion beam properties (flux, fluence, and energy) of argon, neon, and nitrogen gases with pressure variation in the spherical plasma focus device, KPU200 SPF. Numerical experiments are performed using the Lee code (version: RADPFV5.16FIB) with the gases in the pressure range of 0.10 - 19 Torr. The electrode geometry has been obtained by applying the ‘equivalent straightened electrode’ technique. The computed results for each of the gases show that the ion beam properties increase with the increase in pressure until reach a peak value and then start to reduce with further pressure increase. The peak ion beam flux (ions m-2 s-1), fluence (ions m-2), and energy (J) from heavier argon pinch plasma are found as 5.31 × 1027 at 2 Torr, 8.93 × 1020 at 3.5 Torr, and 3.46 × 104 at 3 Torr, respectively which are the utmost values from neon and nitrogen gases. Significant correlations of pinch radius and duration, effective charge number, and induced voltage with these ion beam properties are noticed and discussed in this paper. The obtained results of this study are compared with those of the NX2 plasma focus device that makes the consistency of the present research work.

show abstract

Surface modifications of fusion reactor relevant materials on exposure to fusion grade plasma in plasma focus device

Cited by 25 publications

References 40 publications

The INVESTIGATION OF RADIATION EFFECT ON TUNGSTEN AND MOLYBDENUM MATERIALS

The INVESTIGATION OF RADIATION EFFECT ON TUNGSTEN AND MOLYBDENUM MATERIALS

Growth, characterization, and investigation of H2 gas sensing performance of Al-doped ZnO thin films synthesized by plasma focus device

Characteristics of Ion Beam for Various Gases in a Spherical Plasma Focus Device

Contact Info

Product

Resources

About