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Overview of the TCS-Upgrade device

Author: James A. Grossnickle
Requested Type: Poster Only
Submitted: 2009-12-04 16:40:20

Co-authors: R.D. Brooks, C.L. Deards, A.L. Hoffman, P.A. Melnik, K.E. Miller, R.D. Milroy, A. Tankut, K.M. Velas, G.C. Vlases, and the RPPL Team

Contact Info:
University of Washington Redmond Plasma Physics La
14700 NE 95th St
Redmond, WA   98052
USA

Abstract Text:
The Translation, Confinement, and Sustainment Upgrade (TCSU) device is a facility to form and sustain field-reversed configurations (FRC) in steady-state using rotating magnetic fields (RMF). Recent campaigns include Ti gettering, the installation of a set of internal flux rings, and RMF frequency scans. The Ti gettering campaign was carried out to reduce impurities and to reduce deuterium recycling from the walls for density control. This was successful, and for the first time FRCs were sustained using external gas puffs instead of wall recycling for fueling. These plasmas had very little impurity radiation, and it was also possible, with better inventory control, to form hotter FRCs by operating at lower densities. The puff fueling system has recently been upgraded to give better density control throughout a discharge. Internal flux rings have been installed to provide a uniform flux surface and minimize plasma-wall contact. Results from the Ti gettering and internal flux ring campaigns will be reported. Additional diagnostics, including an internal 3-axis magnetic field probe, have been employed. A number of RMF frequencies, from 123kHz – 210kHz, are being investigated and results will be reported.

Characterization: A1,A3

Comments:
Please place together with the following in order:
1. J.A Grossnickle
2. K.M. Velas
3. R.P. Golingo
Thank you.