PHiDAS: A two dimensional Langmuir probe array and high capacity CAMAC based data acquisition system
- Institute of Plasma and Fusion Research, University of California, Los Angeles, California 90024 (United States)
An 8[times]8 array of Langmuir probes has been developed for measuring turbulent plasma parameters in tokamak edge plasmas. Fluctuations in plasma density [ital [tilde n]](r,[theta],t) and floating potential [tilde [phi]][sub [ital f]](r,[theta],t) can be measured by the diagnostic, as well as the steady state (dc), profiles in [ital [bar n]][sub [ital e]](r,[theta]) and [bar [phi]][sub [ital f]](r,[theta]). The signal from each probe is processed by individual custom pre-amplifier circuits and the data from all probes are acquired simultaneously by a custom CAMAC based data acquisition system. This data acquisition system has 10 bit resolution with a maximum speed of 20 MS/s and has applications for various types of tokamak diagnostic arrays. Design considerations for the probe array and data acquisition system are discussed. Preliminary results from the probe array will be presented.
- DOE Contract Number:
- FG03-86ER52134
- OSTI ID:
- 6699553
- Journal Information:
- Review of Scientific Instruments; (United States), Vol. 66:1; ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PLASMA DIAGNOSTICS
LANGMUIR PROBE
TOKAMAK DEVICES
TURBULENCE
CAMAC SYSTEM
DATA ACQUISITION SYSTEMS
FLUCTUATIONS
PLASMA DENSITY
PLASMA POTENTIAL
CLOSED PLASMA DEVICES
ELECTRIC POTENTIAL
ELECTRIC PROBES
PROBES
THERMONUCLEAR DEVICES
VARIATIONS
700320* - Plasma Diagnostic Techniques & Instrumentation- (1992-)
700410 - Specific Fusion Devices & Experiments- (1992-)