Analysis of a Radio‐Frequency Structure Used for Plasma Production and Heating

1970 ◽  
Vol 41 (9) ◽  
pp. 3739-3744 ◽  
Author(s):  
A. Orefice ◽  
R. Pozzoli
Keyword(s):  
Radio Frequency ◽  
Plasma Production ◽  
Plasma Production And Heating ◽  
Frequency Structure

Edge plasma potential and associated ion fluxes to the surface during ICRF plasma production and heating in the Uragan-3 Torsatron

1990 ◽  
Vol 12 (1-2) ◽  
pp. 171-178 ◽  
Author(s):  
V.V. Chechkin ◽  
L.I. Grigor'eva ◽  
N.I. Nazarov ◽  
O.S. Pavlichenko ◽  
G.N. Polyakova ◽  
...  
Keyword(s):  
Plasma Potential ◽  
Ion Fluxes ◽  
Edge Plasma ◽  
Plasma Production ◽  
Plasma Production And Heating

Plasma Production in the Hanbit Magnetic Mirror Device by Radio Frequency Waves

1999 ◽  
Vol 35 (1T) ◽  
pp. 268-272 ◽  
Author(s):  
J. G. Yang ◽  
B. C. Kim ◽  
H. K. Na ◽  
N. S. Yoon ◽  
J. Hong ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Magnetic Mirror ◽  
Plasma Production ◽  
Radio Frequency Waves

scholarly journals Quantifying excess power from radio frequency interference in Epoch of Reionization measurements

2020 ◽  
Vol 498 (1) ◽  
pp. 265-275
Author(s):  
Michael J Wilensky ◽  
Nichole Barry ◽  
Miguel F Morales ◽  
Bryna J Hazelton ◽  
Ruby Byrne
Keyword(s):  
Power Spectrum ◽  
Radio Frequency ◽  
Flux Density ◽  
Higher Order ◽  
Mitigation Strategies ◽  
Error Tolerance ◽  
Radio Frequency Interference ◽  
Frequency Structure ◽  
Excess Power ◽  
Source Emission

ABSTRACT We quantify the effect of radio frequency interference (RFI) on measurements of the 21-cm power spectrum during the Epoch of Reionization (EoR). Specifically, we investigate how the frequency structure of RFI source emission generates contamination in higher order wave modes, which is much more problematic than smooth-spectrum foreground sources. Using a relatively optimistic EoR model, we find that even a single relatively dim RFI source can overwhelm the EoR power spectrum signal of $\sim 10\, {\rm mK}^2$ for modes $0.1 \ \lt k \lt 2 \, h\, {\rm Mpc}^{-1}$. If the total apparent RFI flux density in the final power spectrum integration is kept below 1 mJy, an EoR signal resembling this optimistic model should be detectable for modes $k \lt 0.9\, h\, {\rm Mpc}^{-1}$, given no other systematic contaminants and an error tolerance as high as 10 per cent. More pessimistic models will be more restrictive. These results emphasize the need for highly effective RFI mitigation strategies for telescopes used to search for the EoR.

scholarly journals First experiments on ICRF discharge generation by a W7-X-like antenna in the Uragan-2M stellarator

2020 ◽  
Vol 86 (5) ◽  
Author(s):  
V. E. Moiseenko ◽  
Yu. V. Kovtun ◽  
T. Wauters ◽  
A. Goriaev ◽  
A. I. Lyssoivan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Hydrogen Production ◽  
Cyclotron Frequency ◽  
Vacuum Vessel ◽  
Plasma Production ◽  
Plasma Production And Heating ◽  
Ion Generation ◽  
Target Plasma ◽  
Fast Ion ◽  
Made In

In support of the ICRF experiments planned on the Wendelstein 7-X (W7-X) stellarator, i.e. fast ion generation, wall conditioning, target plasma production and heating, a first experimental study on plasma production has been made in the Uragan-2M (U-2M) stellarator using W7-X-like two-strap antenna. In all the experiments, antenna monopole phasing was used. The W7-X-like antenna operation with launched radiofrequency power of ~100 kW have been performed in helium (p = (4–14) × 10−2 Pa) with the vacuum vessel walls pre-loaded with hydrogen. Production of plasma with a density higher than 1012 cm−3 was observed near the first harmonic of the hydrogen cyclotron frequency. Operation at first hydrogen harmonic is feasible in W7-X future ICRF experiments.

Radio-frequency plasma production using a ladder-shaped antenna

1999 ◽  
Vol 116-119 ◽  
pp. 662-665 ◽  
Author(s):  
Y. Kawai ◽  
M. Yoshioka ◽  
T. Yamane ◽  
Y. Takeuchi ◽  
M. Murata
Keyword(s):  
Radio Frequency ◽  
Radio Frequency Plasma ◽  
Plasma Production ◽  
Frequency Plasma

RF plasma production and heating below ion-cyclotron frequencies in Uragan torsatrons

2011 ◽  
Vol 51 (8) ◽  
pp. 083036 ◽  
Author(s):  
V.E. Moiseenko ◽  
V.L. Berezhnyj ◽  
V.N. Bondarenko ◽  
P.Ya. Burchenko ◽  
F. Castejón ◽  
...  
Keyword(s):  
Rf Plasma ◽  
Plasma Production ◽  
Plasma Production And Heating ◽  
Ion Cyclotron
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