Embedded calibration system for the DIII-D Langmuir probe analog fiber optic links

Journal Article · Mon Oct 15 00:00:00 EDT 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4731761· OSTI ID:22093853

Watkins, J. G. ^[1]; Rajpal, R.; Mandaliya, H. ^[2]; Watkins, M.; Boivin, R. L. ^[3]

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1. Sandia National Laboratories, Livermore, California (United States)
2. Institute for Plasma Research, Bhat, Gandhinagar, Gujarat (India)
3. General Atomics, San Diego, California (United States)

This paper describes a generally applicable technique for simultaneously measuring offset and gain of 64 analog fiber optic data links used for the DIII-D fixed Langmuir probes by embedding a reference voltage waveform in the optical transmitted signal before every tokamak shot. The calibrated data channels allow calibration of the power supply control fiber optic links as well. The array of fiber optic links and the embedded calibration system described here makes possible the use of superior modern data acquisition electronics in the control room.

• OSTI ID: 22093853
• Journal Information: Review of Scientific Instruments, Vol. 83, Issue 10; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
AVAILABILITY
CALIBRATION
DATA ACQUISITION
DOUBLET-3 DEVICE
GAIN
LANGMUIR PROBE
OPTICAL FIBERS
WAVE FORMS