J
John Mandrekas
Researcher at Georgia Institute of Technology
Publications - 49
Citations - 1704
John Mandrekas is an academic researcher from Georgia Institute of Technology. The author has contributed to research in topics: Tokamak & Neutral particle. The author has an hindex of 17, co-authored 47 publications receiving 1615 citations.
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Journal ArticleDOI
Comparisons and physics basis of tokamak transport models and turbulence simulations
Andris Dimits,Glenn Bateman,Michael A. Beer,Bruce I. Cohen,William Dorland,Gregory W. Hammett,Charlson C. Kim,J. E. Kinsey,Mike Kotschenreuther,Arnold H. Kritz,L. L. Lao,John Mandrekas,W. M. Nevins,Scott Parker,Aaron J. Redd,D. E. Shumaker,Richard Sydora,Jan Weiland +17 more
TL;DR: In this paper, the authors compared the performance of gyrokinetic and gyrofluid simulations of ion-temperature gradient (ITG)instability and turbulence in tokamak plasmas as well as some tokak plasma thermal transportmodels.
Journal ArticleDOI
Beta scaling of transport on the DIII-D Tokamak: Is transport electrostatic or electromagnetic?
C.C. Petty,T.C. Luce,D. C. McDonald,John Mandrekas,M. R. Wade,Jeff Candy,J.G. Cordey,V. Drozdov,T.E. Evans,J.R. Ferron,R. J. Groebner,A.W. Hyatt,G.L. Jackson,R.J. La Haye,T.H. Osborne,R. E. Waltz +15 more
TL;DR: In this article, the scaling of heat transport with the ratio of the plasma kinetic pressure to the magnetic pressure was measured in high confinement mode (H-mode) plasmas with edge localized modes.
Journal ArticleDOI
Commercial tokamak reactor potential with advanced tokamak operation
TL;DR: In this article, the impact of varying levels of plasma energy confinement and allowable beta on the size and cost of the resulting tokamak reactor is systematically quantified, and designs are optimized in terms of cost of electricity (COE) via coupled physics/engineering/costing systems code.
Journal ArticleDOI
Physics of confinement improvement of plasmas with impurity injection in DIII-D
M. Murakami,George McKee,G.L. Jackson,G. M. Staebler,David A. Alexander,D.R. Baker,Glenn Bateman,Larry R. Baylor,J.A. Boedo,N.H. Brooks,K. H. Burrell,John R. Cary,Ronald H. Cohen,R. J. Colchin,J.C. DeBoo,E. J. Doyle,D. R. Ernst,T.E. Evans,C. Fenzi,C. M. Greenfield,D.E. Greenwood,R. J. Groebner,J.T. Hogan,Wayne A Houlberg,A.W. Hyatt,R. Jayakumar,T. C. Jernigan,R.A. Jong,J.E. Kinsey,Arnold H. Kritz,R.J. La Haye,L.L. Lao,C.J. Lasnier,M. A. Makowski,John Mandrekas,A. M. Messiaen,R.A. Moyer,J. Ongena,Alexei Pankin,T.W. Petrie,C.C. Petty,Curtis L. Rettig,Terry Rhodes,B. W. Rice,D. W. Ross,J.C. Rost,Svetlana G. Shasharina,H.E. St. John,Weston M. Stacey,Pär Strand,Richard Sydora,T. S. Taylor,Daniel Thomas,M. R. Wade,R. E. Waltz,W.P. West,K.L. Wong,Lei Zeng,Diii-D Team +58 more
TL;DR: In this paper, external impurity injection into L mode edge discharges in DIII-D has produced clear confinement improvement (a factor of 2 in energy confinement and neutron emission), reduction in all transport channels (particularly ion thermal diffusivity to the neoclassical level), and simultaneous reduction of long wavelength turbulence.
Journal ArticleDOI
A “SuperCode” for Systems Analysis of Tokamak Experiments and Reactors
Scott W. Haney,W. L. Barr,J. A. Crotinger,L.J. Perkins,C. J. Solomon,E.A. Chaniotakis,J. P. Freidberg,J. Wei,John D Galambos,John Mandrekas +9 more
TL;DR: A new code, named SUPERCODE, has been developed to fill the gap between currently available zero dimensional systems codes and highly sophisticated, multidimensional plasma performance codes by calculating the self consistent 1 1/2-D plasma evolution in a realistic engineering environment.