skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: On going and planned D-T experiments on TFTR

Abstract

In the first phase of deuterium-tritium (D-T) experiments on TFTR, routine D-T operation was established to permit quantitative evaluation of the characteristics of D-T plasmas relative to those of comparable D-D plasmas. It was immediately observed that the isotope effect gave a significant increase in the overall energy confinement in D-T plasma relative to that of the D-D plasma. Energy confinement has been increased to over 0.3 sec in the supershot (peaked density, hot-ion mode) regime in TFTR with aggressive lithium conditioning. As a result, the fusion performance is no longer limited by confinement but is now limited by instability driven by high central pressure ({beta}) and by high pressure gradients. A series of experiments have been undertaken in the reverse shear (RS) and high internal inductance (high I{sub i}) regimes to enhance core stability. On-going experiments are directed toward further enhancing the performance in the reverse shear regime at higher plasma current and toroidal magnetic field in order to enhance fusion performance and especially alpha particle density to support alpha particle physics studies. To further augment the efforts to optimize the performance in the reverse shear mode, localized ICRF heating and current drive in the mode conversion (MC) regimemore » is to be employed. The 30 MHz system will permit MC operation in the D-T regime and also will support alpha interaction studies. Antenna upgrades are planned in the near future to improve the MC spectrum for better current profile control and to provide IBW transport barrier formation for better pressure control.« less

Authors:
 [1]
  1. Princeton Plasma Physics Lab., NJ (United States)
Publication Date:
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
428016
Report Number(s):
CONF-960634-
Journal ID: ISSN 0730-9244; TRN: IM9708%%345
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Conference
Resource Relation:
Conference: 1996 IEEE international conference on plasma science, Boston, MA (United States), 3-5 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of IEEE conference record -- Abstracts: 1996 IEEE international conference on plasma science; PB: 324 p.
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; TFTR TOKAMAK; RESEARCH PROGRAMS; EXPERIMENT PLANNING; PLASMA CONFINEMENT; PERFORMANCE; ICR HEATING; ELECTRIC CURRENTS; OPERATION

Citation Formats

Mueller, D. On going and planned D-T experiments on TFTR. United States: N. p., 1996. Web.
Mueller, D. On going and planned D-T experiments on TFTR. United States.
Mueller, D. 1996. "On going and planned D-T experiments on TFTR". United States.
@article{osti_428016,
title = {On going and planned D-T experiments on TFTR},
author = {Mueller, D},
abstractNote = {In the first phase of deuterium-tritium (D-T) experiments on TFTR, routine D-T operation was established to permit quantitative evaluation of the characteristics of D-T plasmas relative to those of comparable D-D plasmas. It was immediately observed that the isotope effect gave a significant increase in the overall energy confinement in D-T plasma relative to that of the D-D plasma. Energy confinement has been increased to over 0.3 sec in the supershot (peaked density, hot-ion mode) regime in TFTR with aggressive lithium conditioning. As a result, the fusion performance is no longer limited by confinement but is now limited by instability driven by high central pressure ({beta}) and by high pressure gradients. A series of experiments have been undertaken in the reverse shear (RS) and high internal inductance (high I{sub i}) regimes to enhance core stability. On-going experiments are directed toward further enhancing the performance in the reverse shear regime at higher plasma current and toroidal magnetic field in order to enhance fusion performance and especially alpha particle density to support alpha particle physics studies. To further augment the efforts to optimize the performance in the reverse shear mode, localized ICRF heating and current drive in the mode conversion (MC) regime is to be employed. The 30 MHz system will permit MC operation in the D-T regime and also will support alpha interaction studies. Antenna upgrades are planned in the near future to improve the MC spectrum for better current profile control and to provide IBW transport barrier formation for better pressure control.},
doi = {},
url = {https://www.osti.gov/biblio/428016}, journal = {},
issn = {0730-9244},
number = ,
volume = ,
place = {United States},
year = {Tue Dec 31 00:00:00 EST 1996},
month = {Tue Dec 31 00:00:00 EST 1996}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: