Zobrazeno 1 - 10
of 308
pro vyhledávání: '"Noah Hershkowitz"'
Publikováno v:
Journal of visualized experiments : JoVE. (171)
Langmuir probes have long been used in experimental plasma physics research as the primary diagnostic for particle fluxes (i.e., electron and ion fluxes) and their local spatial concentrations, for electron temperatures, and for electrostatic plasma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c688c157136c2e15ea3e18e569698117
https://pubmed.ncbi.nlm.nih.gov/34125090
https://pubmed.ncbi.nlm.nih.gov/34125090
Publikováno v:
Journal of Propulsion and Power. 33:614-637
This article provides recommended methods for building, operating, and taking plasma potential measurements from electron-emitting probes in electric propulsion devices, including Hall thrusters, gridded ion engines, and others. The two major techniq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a98c80c695728098c3c6407960e0f47
https://doi.org/10.2514/1.b35697
https://doi.org/10.2514/1.b35697
Autor:
Noah Hershkowitz
Publikováno v:
IEEE Transactions on Plasma Science. 44:347-363
This paper presents an overview of some of the most enjoyable low-temperature plasma experiments I have carried out with my students over the course of my career. It begins with the connection between solitons and the Schrodinger equation, and contin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2101b2b68bc94c5eccbd2a765a41804c
https://doi.org/10.1109/tps.2015.2508744
https://doi.org/10.1109/tps.2015.2508744
Publikováno v:
Plasma Sources Science and Technology. 29:115021
Emission characteristics of a directly heated, rod-shaped LaB6 hot cathode has been studied in a multi-dipole confinement device. It is found that contrary to predictions from the conventional space-charge limited emission theory, emission current is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21deae1db69d12d3a13d15de89e3776b
https://doi.org/10.1088/1361-6595/abbdc9
https://doi.org/10.1088/1361-6595/abbdc9
Publikováno v:
Plasma Sources Science and Technology. 29:025025
I–V traces of strongly emitting emissive probes are investigated in a multidiople filament discharge. It is found that at sufficiently high neutral pressure and emitting current, the variation of the I–V traces and their associated inflection poi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c9dbaad9b8ba99caf60bf1af36ff39e
https://doi.org/10.1088/1361-6595/ab60dd
https://doi.org/10.1088/1361-6595/ab60dd
Publikováno v:
Plasma Sources Science and Technology. 29:025015
The plasma potential measured by cylindrical and planar Langmuir probes has been shown to differ from the plasma potential measured by emissive probes in the neighborhood of the presheath near a negatively biased electrode immersed in a weakly collis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::789db78e6cf590e946b0be872f5e4108
https://doi.org/10.1088/1361-6595/ab69e5
https://doi.org/10.1088/1361-6595/ab69e5
Publikováno v:
Industrial & Engineering Chemistry Research. 52:6610-6616
TiO2 nanoparticles were coated uniformly, with a controllable thickness of conductive polymer polythiophene, in a rotating capacitively coupled radio-frequency (RF) plasma reactor. Plasma parameters such as power, pressure, and time affected the prop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b47a2e7c51bad39cadc4e8cfb0b0f76b
https://doi.org/10.1021/ie303176j
https://doi.org/10.1021/ie303176j
Autor:
Young-chul Ghim, Noah Hershkowitz
Since Langmuir's pioneering studies, low temperature plasma studies have evolved from single positive ion species plasmas, to plasmas with combinations of positive and negative ions in addition to electrons, to plasmas with very heavy negative dust i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0563ebe8ea4012d5b1e8a69bcce5c409
https://ora.ox.ac.uk/objects/uuid:5bab58ea-826d-4e0f-8280-a38b640e5e4d
https://ora.ox.ac.uk/objects/uuid:5bab58ea-826d-4e0f-8280-a38b640e5e4d
Autor:
Noah Hershkowitz, Lutfi Oksuz
Publikováno v:
Physics Letters A. 375:2162-2165
Negative plasma potentials were obtained in DC hot filament unmagnetized electropositive argon plasma for sufficiently low neutral pressure. Double layers provide ion and electron confinement near the walls. The potential profiles from the center of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::20e017567303c5c911df41679969042d
https://doi.org/10.1016/j.physleta.2011.04.036
https://doi.org/10.1016/j.physleta.2011.04.036
Publikováno v:
Physics Letters A. 375:1733-1736
The electrical and optical characteristics of a coaxial rf atmospheric pressure dielectric barrier discharge (DBD) with one electrode covered with glass and with helium in air were investigated. Optical measurements with an intensified charge coupled
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82c9f8e639027fee28b7c828776d35a8
https://doi.org/10.1016/j.physleta.2011.02.070
https://doi.org/10.1016/j.physleta.2011.02.070