Zobrazeno 1 - 10
of 189
pro vyhledávání: '"John Scharer"'
Autor:
Alexander Y. Sun, Velimir V. Vesselinov, Adam Rupe, Roland N. Horne, Luke P. Frash, Kevin Jameson, Sam Skillman, Daniel O'Malley, Bulbul Ahmmed, Satish Karra, Richard S. Middleton, Boian S. Alexandrov, John Scharer, Amy Banerji, Bridget R. Scanlon, Mark Mims, Zitong Zhou, Conor Maguire, Daniel M. Tartakovsky, Maruti Kumar Mudunuru
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::464571d40fab945d887013d826bfcfde
https://doi.org/10.2172/1782607
https://doi.org/10.2172/1782607
Autor:
Xun Xiang, Abelardo Abel S. Garcia, John Scharer, Brian Kupczyk, Chien-Hao Liu, John H. Booske
Publikováno v:
IEEE Transactions on Plasma Science. 44:15-24
Recent improvements in high-power micro-wave (HPM) source power and portability make protecting sensitive electronics from electronic attack critically important. The research reported in this paper examined basic phenomena associated with a distribu
Publikováno v:
IEEE Transactions on Plasma Science. 37:2110-2115
Discharge initiation at low pressures and flow rates is investigated in the Madison helicon experiment flowing helicon source. At low pressures (below 14-sccm flow rate), a threshold magnetic field exists for discharge initiation which depends on RF
Autor:
M. Thiyagarajan, John Scharer
Publikováno v:
IEEE Transactions on Plasma Science. 36:2512-2521
We present the measurements and analysis of laser-induced breakdown processes in dry air at a wavelength of 193 nm by focusing 180-mJ 10-MW high-power 193-nm UV ArF laser radiation onto a 30-mum-radius spot size. We examine pressures ranging from 40
Publikováno v:
IEEE Transactions on Plasma Science. 34:2637-2651
Experiments are performed using 193-nm ultraviolet laser preionization of a seed gas in atmospheric pressure range argon and nitrogen to initiate a discharge that is sustained by 13.56-MHz radiofrequency (RF) power using efficient inductive wave coup
Publikováno v:
IEEE Transactions on Electron Devices. 52:709-717
The nonlinearity inherent in the traveling wave tube (TWT) amplifier distorts amplified signals and results in reduced efficiency and bandwidth, limiting its use in communication and electronic countermeasure applications. Signal predistortion is an
Publikováno v:
IEEE Transactions on Plasma Science. 32:813-822
We present an interferometric and spectroscopic characterization of ultraviolet (UV) laser photoionization of a low ionization potential organic vapor, tetrakis (dimethylamino) ethylene (TMAE), seeded in high-pressure air component gases. These exper
Publikováno v:
Physics of Plasmas. 11:878-887
Helicon waves are excited in a plasma wave facility by a half-turn double-helix antenna operating at 13.56 MHz for static magnetic fields ranging from 200 to 1000 G. A non-perturbing optical probe located outside the Pyrex™ plasma chamber is used t
Publikováno v:
Review of Scientific Instruments. 74:996-1001
A general formulation for the measurement of plasma density and effective collision frequency for lowly as well as highly, collisional plasmas using millimeter wave interferometry is presented. In the presence of high density and collisionality at hi
Publikováno v:
Physics of Plasmas. 9:3734-3742
This research was supported by National Science Foundation (NSF) Grant No. ECS-9905948 and AFOSR Grant No. F49620-00-1-0191. J.S. also thanks the Australian National University for their generous support while there