scholarly journals ECR discharge sustained by millimeter waves as a source of dense plasma flux

2021 ◽  
pp. 12-18
Author(s):  
Sergei Golubev ◽  
Vadim Skalyga ◽  
Ivan Izotov ◽  
Roman Shaposhnikov ◽  
Sergei Razin ◽  
...  
Keyword(s):  
Discharge Plasma ◽  
Ion Beam ◽  
Hydrogen Plasma ◽  
Plasma Heating ◽  
Record Values ◽  
Plasma Flux ◽  
Neutral Beam Injector ◽  
Controlled Thermonuclear Fusion ◽  
Flux Profile ◽  
Ion Current Density

The results of the investigation of the dense ECR discharge hydrogen plasma flux formation in the single solenoid magnetic field are presented in this work. The transversal flux profile obtained at the optimal system parameters is shown. The possibility of the formation of homogeneous plasma fluxes with density of 750 mA/cm2 and total current of 5 A is demonstrated. The results of the first experiments of the hydrogen ion beam extraction from the ECR discharge plasma in the single magnetic coil are presented. The record values of the ion current density higher than 1.5 A/cm2 were obtained. The results of the research presented in this paper show the prospects of the proposed system for applications of the neutral beam injector development for the plasma heating in the controlled thermonuclear fusion installations.

Two-stream and filamentation instabilities for a light ion beam—plasma system

1987 ◽  
Vol 37 (3) ◽  
pp. 373-382 ◽  
Author(s):  
Toshio Okada ◽  
Winfried Schmidt
Keyword(s):  
Proton Beam ◽  
Size Effects ◽  
Ion Beam ◽  
Plasma Heating ◽  
Finite Size ◽  
Stability Conditions ◽  
Plasma System ◽  
Finite Size Effects ◽  
Stability Boundaries ◽  
Gas Discharges

Electrostatic two-stream and electromagnetic filamentation instabilities for a light ion beam penetrating a plasma are investigated. The dispersion relations of these instabilities including the effect of plasma heating by the ion beam are solved analytically and numerically. Stability conditions are derived for propagation through a plasma. Attention is paid to the finite size effects of beams with small diameters of the order 0·1 cm typical for pinched gas discharges. The results are illustrated by plotting stability boundaries for a 100 keV proton beam propagating through a plasma.

Hydrogen-plasma etching of ion beam deposited c-BN films: An in situ investigation of the surface with electron spectroscopy

2000 ◽  
Vol 88 (10) ◽  
pp. 5597-5604 ◽  
Author(s):  
P. Reinke ◽  
P. Oelhafen ◽  
H. Feldermann ◽  
C. Ronning ◽  
H. Hofsäss
Keyword(s):  
Plasma Etching ◽  
Electron Spectroscopy ◽  
Ion Beam ◽  
Hydrogen Plasma ◽  
In Situ Investigation

Magnetically Induced Plasma Rotation and the Dense Plasma Focus

1983 ◽  
Vol 38 (9) ◽  
pp. 949-958 ◽  
Author(s):  
E. A. Witalis
Keyword(s):  
Plasma Focus ◽  
Dense Plasma ◽  
Ion Beam ◽  
Plasma Heating ◽  
Ion Acceleration ◽  
Current Channel ◽  
Plasma Rotation ◽  
Fusion Research ◽  
Focus Plasma ◽  
Further Development

Abstract Fusion for Fission fuel breeding and other incentives for unconventional magnetic fusion research are introductorily mentioned. The design, operation and peculiar characteristics of dense plasma foci are briefly described with attention to their remarkable ion acceleration and plasma heating capabilities. Attempts for interpretations are reviewed, and a brief account is given for an explanation based on the concept of magnetically induced plasma rotation, recently derived in detail in this journal. Basically an ion acceleration mechanism of betraton character it describes in combination with a dynamic, generalized Bennett relation focus plasma characteristics like the polarity dependence, the current channel disruption, the axial ion beam formation and the prerequisites for the ensuing turbulent plasma dissipative stage. Fundamental differences with respect to mainline fusion research are emphasized, and some conjectures and proposals are presented as to the further development of plasma focus nuclear fusion or fission energy production.

scholarly journals Experiments on generation of a high-power ion beam in a plasma-filled diode

1993 ◽  
Vol 11 (1) ◽  
pp. 269-276
Author(s):  
V. M. Bystritskii ◽  
A. V. Kharlov ◽  
G. A. Mesyats ◽  
A. V. Mytnikov ◽  
A. A. Sinebrjukhov
Keyword(s):  
High Power ◽  
Ion Beam ◽  
Optimal Time ◽  
Stable Operation ◽  
Magnetic Insulation ◽  
Matched Load ◽  
Opening Switch ◽  
Power Enhancement ◽  
Switch Mode ◽  
Ion Current Density

The experimental results on high-power ion beams (HPIB) generation in a plasma-filled, spherical-focusing diode with self-magnetic insulation that was placed for a load at nanosecond accelerator PARUS of 0.2-TW power and 60-ns pulse duration (in a matched load case) are given. The regimes of plasma-filled diode operation and generation of the ion beam were investigated. For optimal time delay between the plasma gun's pulse and accelerator firing, the stable operation in the plasma opening switch mode with a power enhancement factor of 2.3 and efficiency of ion beam generation of 20–25% was obtained. The maximal value of the ion current density reached in the focal plane was 15 kA/cm2.

Vacuum Insulation and Achievement of 980 keV, 185 A/m2H−Ion Beam Acceleration at JAEA for the ITER Neutral Beam Injector

2013 ◽  
Vol 15 (2) ◽  
pp. 179-183 ◽  
Author(s):  
Hiroyuki Tobari ◽  
Masaki Taniguchi ◽  
Mieko Kashiwagi ◽  
Masayuki Dairaku ◽  
Naotaka Umeda ◽  
...  
Keyword(s):  
Ion Beam ◽  
Neutral Beam ◽  
Neutral Beam Injector ◽  
Vacuum Insulation

The diagnostic neutral beam injector with arc-discharge plasma source on the TCV Tokamak

2009 ◽  
Vol 84 (2-6) ◽  
pp. 993-997 ◽  
Author(s):  
Alexander N. Karpushov ◽  
Yanis Andrebe ◽  
Basil P. Duval ◽  
Alessandro Bortolon
Keyword(s):  
Discharge Plasma ◽  
Arc Discharge ◽  
Plasma Source ◽  
Neutral Beam ◽  
Neutral Beam Injector

Effect of Shot Number on Crater Formation of Magnesium Alloy Modified with High-Intensity Pulsed Ion Beam

2012 ◽  
Vol 627 ◽  
pp. 629-632
Author(s):  
Peng Li
Keyword(s):  
Surface Roughness ◽  
Magnesium Alloy ◽  
Ion Beam ◽  
Surface Profile ◽  
Crater Formation ◽  
Shot Number ◽  
The Mean ◽  
Surface Morphologies ◽  
Ion Current Density ◽  
Surface Increase

Abstract. HIPIB irradiation of magnesium alloy is carried out at a specific ion current density of 100 A/cm2 with shot number from one to ten in order to explore the effect of shot number on crater formation of magnesium alloy. Surface morphologies, surface roughness and mean spacing of surface profile irregularities of the irradiated samples are examined by scanning electron microscopy (SEM) and profilometer technique, respectively. It is found that the surface roughness, the mean spacing of surface profile irregularities, and the maximum crater diameter on the irradiated surface increase with increasing shot number, whereas the crater density decreases as the shot number increases.

Oxygen-ion-beam-driven electrostatic ion cyclotron instability of hydrogen plasma

2009 ◽  
Vol 16 (7) ◽  
pp. 072902 ◽  
Author(s):  
D. V. Chibisov ◽  
V. S. Mikhailenko ◽  
K. N. Stepanov
Keyword(s):  
Ion Beam ◽  
Hydrogen Plasma ◽  
Oxygen Ion ◽  
Cyclotron Instability ◽  
Ion Cyclotron

Analytical study of crossed atom-laser beam plasma diagnostics

1976 ◽  
Vol 15 (3) ◽  
pp. 381-388
Author(s):  
Kaare J. Nygaard
Keyword(s):  
Laser Beam ◽  
Analytical Study ◽  
Ion Beam ◽  
Hydrogen Plasma ◽  
Forward Direction ◽  
Beam Diagnostics ◽  
Plasma Region ◽  
Atom Beam ◽  
First Approximation ◽  
Electric And Magnetic Fields

A new method using crossed laser and atom beams within a plasma is capable of determining the electron density with a spatial resolution of 1 mm and a time resolution of 2–5 nsec. The measurement is done in the forward direction of the atom beam and is to a first approximation independent of electric and magnetic fields inside and outside the plasma region. A calculation is carried out for a neutral cesium beam probing a fully ionized hydrogen plasma. It is pointed out that a laser beam can also be combined with available ion beam diagnostics.

Sign in / Sign up

Export Citation Format

Share Document