| Presentation: | submitted: | by: |
|---|---|---|
| hvfdpjdm_icc07_final-1.pdf | 2007-02-14 13:26:44 | Ioan Bogatu |
Hyper-Velocity Dusty Plasma Jets for Disruption Mitigation
Author: Ioan N. Bogatu
Requested Type: Poster Only
Submitted: 2007-01-12 17:25:31
Co-authors: S.A. Galkin, J.S. Kim, Y.F.C. Thio
Contact Info:
FAR-TECH, Inc.
3550 General Atomics Court
San Diego, CA 92121-1
USA
Abstract Text:
We will present the concept of using hyper-velocity dusty plasma jets for disruption mitigation of magnetically confined plasmas in comparison with neutral gas injection and “killer” pellet approaches. Recently, high-velocity hydrogen plasma jets (Vjet ~ 110 km/sec, njet ~ 2x10^16 cm^-3, m = 17 μg, Tjet ~ 1 eV) have been demonstrated to penetrate deeply into tokamak plasma and magnetic field in fueling experiments on Globus-M tokamak [1, 2]. To achieve the required mass (~0.1 g) for disruption mitigation, plasma jet can be mixed with micron size dust of the suitable impurity. The dust becomes negatively charged, is dragged by the low temperature plasma during acceleration, and can finally reach high enough velocity (~10 - 30 km/s) for penetrating deep into the target plasma. Basic physics understanding, the role of the atomic processes, the interaction with ambient target plasma during penetration, and modeling will be presented to evaluate the principle advantages of high-velocity dusty plasma jet for disruption mitigation purpose.
*Work supported by the Department of Energy under SBIR program.
[1] A.V. Voronin, et al., Nucl. Fusion, 45, 1039 (2005); A.V. Voronin, et al., IAEA 2006 Topic: EX/P3-18.
[2] V. K. Gusev et al., 11th IST Workshop, Chengdu, China, October 11-23, 2006.
Characterization: A5
Comments:
