Biased Electrodes for SOL Control in NSTX

Conference · Thu Jan 01 00:00:00 EST 2009

OSTI ID:1019374

Zweben, S J ^[1]; Maqueda, R J ^[2]; Roqemore, A L ^[1]; Bush, C E ^[3]; Kaita, R ^[1]; Marsala, R J ^[1]; Raitses, Y ^[1]; Cohen, R H ^[4]; Ryutov, D D ^[4]

---

1. Princeton Plasma Physics Laboratory (PPPL)
2. Nova Photonics, Princeton, NJ
3. Oak Ridge National Laboratory (ORNL)
4. Lawrence Livermore National Laboratory (LLNL)

Small electrodes were installed in the outer-midplane edge of NSTX to attempt to control the local width of the scrape-off layer (SOL) by creating an outward E(pol)xB flow. When the applied voltage between electrodes was 90 V, the density between these electrodes increased by a factor of 3-10 over a radial width of similar to 4 cm. Thus a local control of the SOL plasma density was obtained. (C) 2009 Elsevier B.V. All rights reserved.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1019374
• Resource Relation: Conference: 18th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices, Toledo, Spain, 20080526, 20080530
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRODES
PLASMA DENSITY
SOLS
Plasma Convection
Divertor
Probe
Tokamak
Fields
Cells