T-PS Home | Editorial Board | T-PS in IEEE Xplore | Early Access | Manuscript Submission | ||
FEATURED STORIES - MAY 2016 | ||
"Strongly Eccentric Rotational Plasma Lamina Observed in a 2.45-GHz Hydrogen Discharge"by Osvaldo Daniel Cortázar and Ana Megía-MacíasA novel strongly eccentric rotating plasma lamina structure subtending approximately an angle of 120° is reported in a 2.45-GHz driven electron cyclotron resonance hydrogen discharge in the proximity of the chamber wall. Shape and rotation frequencies depend critically on the embedded magnetic field distribution in the plasma chamber as well as on neutral gas pressure and microwave power. The discharge denominated test-bench for ion-sources plasma studies includes a transparent doubled shielded quartz window that keeps the microwave resonance condition. more... | ||
"On the Mechanism of Pulsed Electron Beam Production From an Uninterrupted Plasma Cathode"by David R. Boris, Christopher D. Cothran, Christopher S. Compton, William E. Amatucci, and Scott G. WaltonElectron extraction from a hollow cathode plasma discharge through a primary anode, biased with a dc accelerating potential, is modulated to produce pulsed or continuous electron beams without the interruption of the plasma cathode discharge. This is achieved with the addition of a secondary anode, within the hollow cathode. When this secondary anode is electrically connected to the primary anode, beam production ceases; when the secondary anode is electrically isolated, beam production resumes. Previous works demonstrated the utility and operation of this device; however, the precise physical principles allowing beam modulation were not well characterized. In this paper, we show that beam modulation can be understood in terms of changes in plasma potential within the hollow cathode that either promote or prevent the formation of an electron sheath at the exit of the hollow cathode, which is mediated by the electrical state of the secondary anode. more... | ||
A PUBLICATION OF THE IEEE NUCLEAR AND PLASMA SCIENCES SOCIETY |
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MAY 2016 | VOLUME 44 | NUMBER 5 | ITPSBD | (ISSN 0093-3813) | ||
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