Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Howard, Nathaniel Thomas"'
Autor:
Howard, Nathaniel Thomas
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 227-238).
Using a unique set of diagnostics and model
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 227-238).
Using a unique set of diagnostics and model
Externí odkaz:
http://hdl.handle.net/1721.1/76920
Autor:
Chilenski, Mark Alan, Greenwald, Martin J., Marzouk, Youssef M., Howard, Nathaniel Thomas, White, Anne E., Rice, John E., Walk, John R., Jr., Walk Jr., John R.
Publikováno v:
MIT web domain
The need to fit smooth temperature and density profiles to discrete observations is ubiquitous in plasma physics, but the prevailing techniques for this have many shortcomings that cast doubt on the statistical validity of the results. This issue is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7304fe6d72527f598b384b80291281ee
https://doi.org/10.1088/0029-5515/55/2/023012
https://doi.org/10.1088/0029-5515/55/2/023012
Autor:
Gao, Chi, Rice, John E., Sun, H. J., Reinke, Matthew Logan, Howard, Nathaniel Thomas, Mikkelson, D., Hubbard, Amanda E., Chilenski, Mark Alan, Walk Jr, John R., Hughes, Jerry W., Jr., Ennever, Paul Chappell, Porkolab, Miklos, White, Anne E., Sung, Choongki, Delgado-Aparicio, Luis, Baek, Seung Gyou, Rowan, William L., Brookman, M. W., Greenwald, Martin J., Granetz, Robert S., Wolfe, Stephen M., Marmar, Earl S., Alcator C-Mod Team
Publikováno v:
MIT web domain
Non-local heat transport experiments were performed in Alcator C-Mod ohmic L-mode plasmas by inducing edge cooling with laser blow-off impurity (CaF2) injection. The non-local effect, a cooling of the edge electron temperature with a rapid rise of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84818d131b9ad5c07e9a2d6f624535a6
https://doi.org/10.1088/0029-5515/54/8/083025
https://doi.org/10.1088/0029-5515/54/8/083025
Autor:
Rui Vieira, C. Gao, John Rice, Randy Michael Churchill, Miklos Porkolab, Matthew Reinke, Curran Oi, James Irby, Amanda Hubbard, Paul Ennever, Anne White, D. R. Mikkelsen, Martin Greenwald, J.R. Walk, Nathaniel Thomas Howard, Christian Theiler, Choongki Sung, R. Leccacorvi, Jerry Hughes
Publikováno v:
EPJ Web of Conferences
EPJ Web of Conferences, Vol 87, p 03007 (2015)
EPJ Web of Conferences, Vol 87, p 03007 (2015)
Correlation ECE (CECE) is a diagnostic technique that allows measurement of small amplitude electron temperature, T[subscript e], fluctuations through standard cross-correlation analysis methods. In Alcator C-Mod, a new CECE diagnostic has been insta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::943d930f27b429274bdfb324f1e6cdf0
https://orcid.org/0000-0003-2951-9749
https://orcid.org/0000-0003-2951-9749
Autor:
Martin Greenwald, Robert Mumgaard, Amanda Hubbard, S.M. Wolfe, S.J. Wukitch, J.L. Terry, Anne White, Nathan Howard, L. F. Delgado-Aparicio, C. Gao, Earl Marmar, D.G. Whyte, J. H. Irby, M. Chilenski, Yu-Ming Lin, S. D. Scott, Jerry Hughes, J.R. Walk, John Rice, Matthew Reinke, Robert Granetz
Publikováno v:
Prof. Whyte via Chris Sherratt
Core impurity transport has been investigated for a variety of confinement regimes in Alcator C-Mod plasmas from x-ray emission following injection of medium and high Z materials. In ohmic L-mode discharges, impurity transport is anomalous (D[subscri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::83a3f6c47d50822c80ff41b0320731b7
https://orcid.org/0000-0003-2951-9749
https://orcid.org/0000-0003-2951-9749
Autor:
A.E. Hubbard, Martin Greenwald, John Rice, Paul Ennever, Anne White, C. Gao, Matthew Reinke, Jerry Hughes, Nathan Howard
Publikováno v:
MIT Web Domain
The physical mechanisms that cause tokamak plasmas to rotate toroidally without external momentum input are of considerable interest to the plasma physics community. This paper documents a substantial change in both the magnitude of the core-rotation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ab75c3df3ce0534aaa56a180b53de57
https://orcid.org/0000-0003-2951-9749
https://orcid.org/0000-0003-2951-9749
Autor:
Stephen Wukitch, John Rice, Amanda Hubbard, J. W. Hughes, Y. Podpaly, Yijun Lin, Ian H. Hutchinson, Nathaniel Thomas Howard, A. Bader, David Pace, Matthew Reinke
Publikováno v:
Prof. Hutchinson via Chris Sherratt
In the Alcator C-Mod tokamak, strong, steady-state variations of molybdenum density within a flux surface are routinely observed in plasmas using hydrogen minority ion cyclotron resonant heating. In/out asymmetries, up to a factor of 2, occur with ei
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da564ce1c5cb11abd3c92dfe1a9b0ee2
https://orcid.org/0000-0001-8223-035X
https://orcid.org/0000-0001-8223-035X
Publikováno v:
MIT Web Domain
This paper describes the use of nonlinear gyrokinetic simulations to assess the feasibility of a new correlation electron cyclotron emission (CECE) diagnostic that has been proposed for the Alcator C-Mod tokamak (Marmar et al 2009 Nucl. Fusion 49 104
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::498925fad4ff210d97b056458f0fea73
https://orcid.org/0000-0003-2951-9749
https://orcid.org/0000-0003-2951-9749
Autor:
Matthew Reinke, Nathaniel Thomas Howard, J.L. Terry, James Irby, John Rice, Anne White, Martin Greenwald, Yuri Podpaly, Jerry Hughes, Ian H. Hutchinson
Publikováno v:
Prof. Hutchinson via Chris Sherratt
We demonstrate that existing theories are insufficient to explain up/down asymmetries of argon x-ray emission in Alcator C-Mod ohmic plasmas. Instead of the poloidal variation, ñ[subscript z]/〈n[subscript z]〉, being of order the inverse aspect r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::971a7ea46adbc5149bca320c61522051
https://doi.org/10.1088/0029-5515/53/4/043006
https://doi.org/10.1088/0029-5515/53/4/043006
Autor:
Christopher Holland, Choongki Sung, J. E. Rice, D. R. Mikkelsen, Amanda Hubbard, Jeff Candy, C. Kung, Martin Greenwald, Jerry Hughes, C.C. Petty, Alexander Creely, Nathan Howard, Earl Marmar, D.G. Whyte, Christian Theiler, Anne White, J. M. Sierchio, J.R. Walk, M. Chilenski, Matthew Reinke, Eric Edlund
Publikováno v:
Prof. White via Chris Sherratt
For the first time, nonlinear gyrokinetic simulations of I-mode plasmas are performed and compared with experiment. I-mode is a high confinement regime, featuring energy confinement similar to H-mode, but without enhanced particle and impurity partic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b6b2b9b7a3548f1503d0aa9bc1a3ac1
https://infoscience.epfl.ch/record/212654
https://infoscience.epfl.ch/record/212654