A Langmuir/Mach probe array for edge plasma turbulence and flow

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1147834· OSTI ID:451753

Back, R; Bengtson, R D ^[1]

---

1. Physics Department and Fusion Research Center, The University of Texas at Austin, Austin, Texas 78712 (United States)

We have installed and operated a reciprocating Langmuir/Mach probe to simultaneously measure parallel and perpendicular plasma flow profiles along with density, temperature, floating potential profiles, and fluctuating parameters such as fluctuation driven particle flux and wave number on a single shot. Plasma facing components are made from boron nitride and the probe tips are 1-mm-diam carbon cylinders. The Mach probe, designed following the Gundestrup model, has 12 probes arranged in a circular array. Four Langmuir probes mounted at the front of the Mach probe array measure floating potential, ion saturation current, and temperature. The perpendicular flow velocity measurements reduced from the Mach probe array compare well with the phase velocity measured from the proud Langmuir probes and the E{sub r}{times}B poloidal rotation. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 451753
• Report Number(s): CONF-960543--
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 68; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOUNDARY LAYERS
ELECTRIC PROBES
FLUCTUATIONS
LANGMUIR PROBE
MACH NUMBER
PHASE VELOCITY
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA POTENTIAL
PLASMA RADIAL PROFILES
TOKAMAK DEVICES
TURBULENT FLOW
WALL EFFECTS
plasma flow
plasma temperature