Zobrazeno 1 - 10
of 15
pro vyhledávání: '"M. D. Campanell"'
Autor:
M. D. Campanell, G. R. Johnson
Publikováno v:
Plasma Physics Reports. 45:69-85
Accumulation of cold ions trapped within a space-charge-limited sheath collapses the sheath, causing a transition to the inverse sheath mode. A driving mechanism creating trapped ions is charge-exchange collisions which occur between fast ions and co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec36d9a3ef468aa91abd008599d31358
https://doi.org/10.1134/s1063780x19010033
https://doi.org/10.1134/s1063780x19010033
Autor:
M. D. Campanell, G. R. Johnson
Publikováno v:
Plasma Sources Science and Technology. 30:015003
Recent one-dimensional simulations of planar sheaths with strong electron emission have shown that trapping of charge-exchange ions causes transitions from space-charge limited (SCL) to inverse sheaths. However, multidimensional emitting sheath pheno
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ec257088ad64cedec230a66e239e282
https://doi.org/10.1088/1361-6595/abcc7b
https://doi.org/10.1088/1361-6595/abcc7b
Autor:
M. D. Campanell
Publikováno v:
Physical review. E. 97(4-1)
It is widely assumed that thermionic current flow through a plasma is limited by a "space-charge limited" (SCL) cathode sheath that consumes the hot cathode's negative bias and accelerates upstream ions into the cathode. Here, we formulate a fundamen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e8c36c8b89e6875efd0fe46bca51d3c5
https://pubmed.ncbi.nlm.nih.gov/29758652
https://pubmed.ncbi.nlm.nih.gov/29758652
Autor:
M. D. Campanell, Maxim Umansky
Publikováno v:
Physical review letters. 116(8)
An important unresolved question in plasma physics concerns the effect of strong electron emission on plasma-surface interactions. Previous papers reported solutions with negative and positive floating potentials relative to the plasma edge. The two
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb9d63d0d69dca5e29a0d51224d87f54
https://pubmed.ncbi.nlm.nih.gov/26967420
https://pubmed.ncbi.nlm.nih.gov/26967420
Autor:
M D Campanell, M V Umansky
Publikováno v:
Plasma Sources Science and Technology. 26:124002
Hot cathodes are crucial components in a variety of plasma sources and applications, but they induce mode transitions and oscillations that are not fully understood. It is often assumed that negatively biased hot cathodes have a space-charge limited
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b137f4e1d66c0ddd4861f57ee344b8d
https://doi.org/10.1088/1361-6595/aa97a9
https://doi.org/10.1088/1361-6595/aa97a9
Autor:
M. D. Campanell
Publikováno v:
Physical review. E, Statistical, nonlinear, and soft matter physics. 88(3)
Most works on plasma-wall interaction predict that with strong electron emission, a nonmonotonic ``space-charge-limited'' (SCL) sheath forms where the plasma potential is positive relative to the wall. We show that a fundamentally different sheath st
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ffbc522ad273f6653781767398750458
https://pubmed.ncbi.nlm.nih.gov/24125367
https://pubmed.ncbi.nlm.nih.gov/24125367
Measurements were made of the motion of the filamentary structures in a plasma ball using high speed cameras and other optical detectors. These filaments traverse the ball radially at ~106 cm/sec at the driving frequency of ~26 kHz, and drift upward
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1fa092f5ac53f7f1d3ead527c4e99d5
https://doi.org/10.2172/973080
https://doi.org/10.2172/973080
Publikováno v:
Plasma Sources Science and Technology. 24:034010
Emission from surfaces is known to cause enhanced wall heating and enhanced energy loss from plasma electrons. When E × B fields are present, emitted electrons are heated by the drift motion and cause enhanced transport along E. All emission effects
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46d78d7b152b46c12a2a7d5cc9302a08
https://doi.org/10.1088/0963-0252/24/3/034010
https://doi.org/10.1088/0963-0252/24/3/034010
Publikováno v:
Physics of Plasmas. 19:123513
The Debye sheath is shown to be unstable under general conditions. For surface materials with sufficient secondary electron emission (SEE) yields, the surface's current-voltage characteristic has an unstable branch when the bulk plasma temperature (T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14d3a1dafa68228bfb89a961e1d12b06
https://doi.org/10.1063/1.4773195
https://doi.org/10.1063/1.4773195