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Overview of Innovative PMI Research on NSTX-U and Associated PMI Facilities at PPPL

2013 Fusion science and technology  
Another area of active PMI investigation is the effect of divertor lithium coating (both in solid and liquid phases).  ...  Combined with the radiative divertor concept, the snow-flake configuration has reduced the divertor heat flux by an order of magnitude in NSTX.  ...  in the world fusion program.  ... 
doi:10.13182/fst13-1t31 fatcat:uw3xepg3pze3fabbznpiyjuy3u

Numerical Techniques for the Study of Long-Time Correlations [article]

Charles F. F. Karney
2004 arXiv   pre-print
In the study of long-time correlations extremely long orbits must be calculated. This may be accomplished much more reliably using fixed-point arithmetic.  ...  Use of this arithmetic on the Cray-1 computer is illustrated.  ...  Indeed if Q * has enough of the "interesting" properties of Q, we might tolerate quite a large error in a single iteration.  ... 
arXiv:nlin/0401035v1 fatcat:jg5zmo5brne53b4hd4xd7x66gm

A Self-Managing Wide-Area Data Streaming Service using Model-based Online Control

Viraj Bhat, Manish Parashar, Mohit Khandekar, Nagarajan Kandasamy, Scott Klasky
2006 2006 7th IEEE/ACM International Conference on Grid Computing  
Furthermore the dynamism of Grid environments and applications requires that these services be able to continually manage and optimize their operation based on system state and application requirements  ...  A Grid-based fusion workflow scenario is used to evaluate the service and demonstrate its feasibility and performance.  ...  IIS 0430826, and by Department of Energy via the grant number DE-FG02-06ER54857.  ... 
doi:10.1109/icgrid.2006.311013 dblp:conf/grid/BhatPKKK06 fatcat:e5v7krnwo5ap3pefa554yg53i4

A self-managing wide-area data streaming service

Viraj Bhat, Manish Parashar, Hua Liu, Nagarajan Kandasamy, Mohit Khandekar, Scott Klasky, Sherif Abdelwahed
2007 Cluster Computing  
Furthermore the dynamism of Grid environments and applications requires that these services be able to continually manage and optimize their operation based on system state and application requirements  ...  A Grid-based fusion workflow scenario is used to evaluate the service and demonstrate its feasibility and performance.  ...  , CNS 0613971, IIS 0430826, and by Department of Energy via the grant number DE-FG02-06ER54857.  ... 
doi:10.1007/s10586-007-0023-x fatcat:jp73o6pi2vcadofhpfr2tuq67y

Grid -Based Parallel Data Streaming implemented for the Gyrokinetic Toroidal Code

S. Klasky, S. Ethier, Z. Lin, K. Martins, D. McCune, R. Samtaney
2003 Proceedings of the 2003 ACM/IEEE conference on Supercomputing - SC '03  
We have applied this method to the Gyrokinetic Toroidal Code (GTC), a 3-dimensional particle-in-cell code used to study micro-turbulence in magnetic confinement fusion from first principles plasma theory  ...  The present approach is conducive to using the grid to pipeline the simulation with post-processing and visualization.  ...  This work was also supported by the internal PPPL funding.  ... 
doi:10.1145/1048935.1050175 dblp:conf/sc/KlaskyELMMS03 fatcat:2kz3rp2ctzc6nlmusnv6ojlvhq

Easy web interfaces to IDL code for NSTX Data Analysis

W.M. Davis
2012 Fusion engineering and design  
Reusing code is a well-known Software Engineering practice to substantially increase the efficiency of code production, as well as to reduce errors and debugging time.  ...  An overview of Web Tools in use on NSTX, and a list of the most useful features, is also presented.  ...  Acknowledgements The author thanks the NSTX users of Web Tools for extensive testing and many suggestions over the years.  ... 
doi:10.1016/j.fusengdes.2012.04.013 fatcat:fvw7aeylpfayneh2siqinpd6c4

Physics Problems of Thermonuclear Reactors

F. L. Ribe
1974 PHYSICS AND THE ENERGY PROBLEM — 1974: The Proceedings of the American Physical Society Topical Conference on Energy  
In the theta-pinch reactor an unstable burn occurs, somewhat regulated by high-beta plasma expansion, which is quenched by a programmed plasma decompression.  ...  A problem common to all controlled fusion reactors is that of the burning deuterium-tritium fuel under conditions of plasma confinement which approach the ideal limit as nearly as possible.  ...  and the requirements of practical power generation.  ... 
doi:10.1063/1.2948470 fatcat:xcdzr73virdofiqjto4zwmohaa

The Production Phase for the National Compact Stellarator Experiment (NCSX) Modular Coil Winding Forms

P. Heitzenroeder, T. Brown, G. Neilson, F. Malinowski, L. Sutton, B. Nelson, D. Williamson, N. Horton, B. Goddard, J. Edwards, K. Bowling, K. Hatzilias
2005 21st IEEE/NPS Symposium on Fusion Engineering SOFE 05  
The production phase for the NCSX modular coil winding forms has been underway for approximately one year as of this date. This is the culmination of R&D efforts which were performed in 2001-4.  ...  The R&D efforts included limited manufacturing studies while NCSX was in its conceptual design phase followed by more detailed manufacturing studies by two teams which included the fabrication of full  ...  The result is a system that provides coordinated, yet flexible, interaction between PPPL and the EIO team to ensure rapid response to requests for information, immediate resolution of problems and satisfactory  ... 
doi:10.1109/fusion.2005.252888 fatcat:dk2yh4cj6zgmxgxpm67g7w64nq

Tools for remote collaboration on the DIII-D National Fusion Facility

B.B. McHarg Jr, T.A. Casper, S. Davis, D. Greenwood
1999 Fusion engineering and design  
This environment will allow further exploration of the technology and sociology of remote participation in the DIII-D program. Having the tools in  ...  In the last two years a joint study by GA, Princeton Plasma Physics Laboratory (PPPL), Lawrence Livermore National Laboratory (LLNL), and Oak Ridge National Laboratory (ORNL) has introduced remote collaboration  ...  In particular, with the shutdown of TFTR, there will be a substantial increase in collaboration from PPPL scientists.  ... 
doi:10.1016/s0920-3796(98)00403-7 fatcat:bjkvgbpsi5bf5bkqukxmch2x2u

Grid computing and collaboration technology in support of fusion energy sciences

D. P. Schissel
2005 Physics of Plasmas  
The simultaneous increase in wide area network speeds has made it practical to envision distributed working environments that are as productive as traditionally collocated work.  ...  This paper briefly reviews the concepts of grid computing and advanced collaborative environments and gives specific examples of how these technologies are being used in fusion research today.  ...  ParaView is being deployed on Tera-Grid in an attempt to solve the problem of grid-based visualization of very large data sets. III.  ... 
doi:10.1063/1.1906219 fatcat:dpnkkc7zsrgpblsajaxu3ynnna

NERSC's Impact on Advances of Global Gyrokinetic PIC Codes for Fusion Energy Research

Stephane Ethier, Choon-Seock Chang, Seung-Hoe Ku, Wei-li Lee, Weixing Wang, Zhihong Lin, William Tang
2015 Computing in science & engineering (Print)  
One example of the numerous computational achievements enabled by NERSC is the development of the global gyrokinetic particle-in-cell approach for the simulation of turbulent transport in tokamak fusion  ...  The National Energy Research Scientific Computing Center (NERSC) was originally launched as a computing center for the exclusive support of magnetic confinement fusion research in the US.  ...  Lin is funded in part by the US Department of Energy (DOE) SciDAC GSEP Center.  ... 
doi:10.1109/mcse.2015.3 fatcat:slcll6bef5ewpitxs5avjmlolm

NEUTRAL BEAM INJECTOR PERFORMANCE ON THE PLT AND PDX TOKAMAKS [chapter]

G. Schilling, D.L. Ashcroft, H.P. Eubank, L.R. Grisham, T.A. Kozub, H.W. Kugel, J. Rossmassler, M.D. Williams
1981 Fusion Technology 1980  
The injection of fast neutral atoms has been used as a plasma heating tool on the PLT tokamak for three years, resulting in the achievement of reactor-like plasma temperatures and an initial understanding  ...  of the properties of such a plasma.  ...  The problems of "large" neutra' 1 beam divergence as represented by the presently achieved fraction of power transmitted to the plasma, as well as the containment of higher power levels for longer pulse  ... 
doi:10.1016/b978-0-08-025697-9.50050-6 fatcat:dfnepmggjngwxgwx4feqmasuqq

Engineering Management Lessons on NCSX

W.T. Reiersen, G.H. Neilson
2005 21st IEEE/NPS Symposium on Fusion Engineering SOFE 05  
The stellarator is a complex, 3-D assembly that has been designed by a team of engineers from the partner institutions, Oak Ridge National Laboratory (ORNL) and PPPL.  ...  The complex, 3-D nature of the stellarator design and the multiinstitutional, geographically dispersed nature of the team have created special management challenges.  ...  INTRODUCTION The design of a proof-of-principle experiment for compact stellarators began in 1998. NCSX grew out of that effort as a partnership between ORNL and PPPL.  ... 
doi:10.1109/fusion.2005.252893 fatcat:ijxfzz5luzhlxf6iq2sxk5gniu

A short history of heavy ion beam probing

R.L. Hickok
1994 IEEE Transactions on Plasma Science  
Some time in the late 1960s (I think it was in 1968) PPPL was converting the Model C Stellarator to the ST Tokamak.  ...  This resulted in it being distributed to a large number of semitechnical trade magazines who then printed articles on their interpretation of what we had done.  ... 
doi:10.1109/27.310635 fatcat:2psliqsejfavvhrf2vehrbojhe

Tandem Mirror Experiment for Basic Fusion Science

Wendell Horton, Igor Alvarado, Xiangrong Fu, Alexei Bekemishev
2014 World Journal of Nuclear Science and Technology  
in the exterior divertor chamber.  ...  There is room for creative new solutions in the magnetic confinement of fusion plasmas, and consideration is given for the alternative approach of using a linear machine with high magnetic mirror fields  ...  Acknowledgements The research is supported by the Department of Energy-Magnetic Fusion Energy, through a grant to the Institute  ... 
doi:10.4236/wjnst.2014.42009 fatcat:w3n2c5lskneyzdx2gteei4t4zi
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