Observations with a Mach probe on edge plasma of the CDX-UR

Armstrong, J.; Choe, W.; Hwang, Y. S.; Lo, E.; Ono, M.
January 1997
Review of Scientific Instruments;Jan1997, Vol. 68 Issue 1, p986
Academic Journal
Reports on Mach probe measurements of the ion saturation current of edge plasma in the upgrade version of the CDX-U machine with toroidal discharge currents approaching 100 kA. Plasma production; Rotational accuracy; Ion current direction signal.


Related Articles

  • Generalized analysis of the use of induction loop probes in azimuthally symmetric inductively... Haas, F.A.; Braithwaite, N.St.J. // Journal of Applied Physics;10/1/1997, Vol. 82 Issue 7, p3612 

    Analyzes the use of induction loop probes in azimuthally symmetric inductively coupled plasma sources. Independence of phase with the radius; Differences in the phases for the two field directions; Extension to cover phases which are arbitrary functions of position.

  • Self-cleaning Langmuir probe. Amatucci, W. E.; Koepke, M. E.; Sheridan, T. E.; Alport, M. J.; Carroll, J. J. // Review of Scientific Instruments;May93, Vol. 64 Issue 5, p1253 

    A contamination-free Langmuir probe of novel design is described. Surface contaminants, which lead to erroneous evaluation of plasma parameters by distortion of the probe's current-voltage characteristic, are removed by the indirect-heating of the probe tip with separate heating elements running...

  • A new smoothing method for obtaining the electron energy distribution function in plasmas by the... Fernandez Palop, J.I.; Ballesteros, J.; Colomer, V.; Hernandez, M.A. // Review of Scientific Instruments;Sep95, Vol. 66 Issue 9, p4625 

    Discusses the use of a smoothing method to obtain the electron energy distribution function (EEDF) in plasmas. Evaluation of the second derivative of the I-V characteristic of a probe immersed in the plasma; Comparison with other smoothing techniques; Measurement of the EEDF in an argon dc...

  • On the surface condition of Langmuir probes in reactive plasmas. Stamate, E.; Ohe, K. // Applied Physics Letters;1/8/2001, Vol. 78 Issue 2, p153 

    The edge effect of a planar probe induces an elliptic-like sheath structure that acts as an electrostatic lens, which then focuses the charged particles on distinct regions of the probe surface. Positive-ion sputtering, chemical adsorption, and/or plasma deposition divide the probe surface into...

  • The Langmuir probe as a diagnostic of the electron component within low temperature laser ablated... Weaver, I.; Martin, G.W.; Graham, W.G.; Morrow, T.; Lewis, C.L.S. // Review of Scientific Instruments;Mar99, Vol. 70 Issue 3, p1801 

    Discusses the use of a Langmuir probe as a diagnostic of the temporally evolving electron component within a laser ablated copper plasma expanding into vacuum. Incident laser power density on target similar to that used for the pulsed laser deposition of thin films; Electron temperature data;...

  • Magnetic fluctuation probe design and capacitive pickup rejection. Franck, Christian M.; Grulke, Olaf; Klinger, Thomas // Review of Scientific Instruments;Nov2002, Vol. 73 Issue 11, p3768 

    In this article the capacitive pickup of magnetic fluctuation probes for plasma applications is studied. The nine most commonly used probe designs are compared with respect to their capacitive pickup rejection, magnetic sensitivity, and minimum plasma disturbance. For absolute calibration, well...

  • Fast reciprocating Langmuir probe for the DIII-D divertor Watkins, J. G.; Hunter, J.; Tafoya, B.; Ulrickson, M.; Watson, R. D.; Moyer, R. A.; Cuthbertson, J. W.; Gunner, G.; Lehmer, R.; Luong, P.; Hill, D. N.; Mascaro, M.; Robinson, J. I.; Snider, R.; Stambaugh, R. // Review of Scientific Instruments;Jan1997, Vol. 68 Issue 1, p373 

    Details how a reciprocating Langmuir probe was used to measure density and temperature profiles, ion flow, and potential fluctuation levels from the lower divertor floor up to the X point on the DIII-D Tokamak. Mechanical design of the probe; Probe tip design; Measurements of physical...

  • Operation of flush-mounted probes in the TdeV tokamak Gunn, J.P.; Boucher, C.; Desroches, D.; Robert, A. // Review of Scientific Instruments;Jan1997, Vol. 68 Issue 1, p404 

    Describes the installation of an array of 16 flush-mounted probes in the outboard divertor plate of the TdeV tokamak, giving a radial resolution of 3.3 millimeters at the plasma strike point. Analysis of the I-V characteristic of a flush-mounted probe; Effect of probe recession.

  • Use of Langmuir probes in a weakly ionized, steady-state plasma with strong magnetic field. Batani, D.; Alba, S.; Lombardi, P.; Galassi, A. // Review of Scientific Instruments;Nov97, Vol. 68 Issue 11, p4043 

    Describes the use of Langmuir probes to measure plasma parameters in low density, low temperature plasmas with a strong applied magnetic field. Instrumental and ionic sheath effects; Comparison of experimental results with direct measurements of the electron distribution function in the...

  • An innovative, simple design for a computer-controlled, three-dimensional plasma probe drive system. Braught, G.; Pfister, H.; Wachtel, J. // Review of Scientific Instruments;Nov93, Vol. 64 Issue 11, p3270 

    A simple design for a fully computer-controlled, three-dimensionally movable probe position system is described. Particular attention is given to the constraints of a plasma environment. A novel spring joint eliminates the need for ball bearings, universal joints, telescoping parts, etc., and...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics