FPGA based demodulation of laser induced fluorescence in plasmas
Instrumentation and Detectors
2018-08-15 v1 Plasma Physics
Abstract
We present a field programmable gate array (FPGA)-based system that counts photons from laser-induced fluorescence (LIF) on a laboratory plasma. This is accomplished with FPGA-based up/down counters that demodulate the data, giving a background-subtracted LIF signal stream that is updated with a new point as each laser amplitude modulation cycle completes. We demonstrate using the FPGA to modulate a laser at 1 MHz and demodulate the resulting LIF data stream. This data stream is used to calculate an LIF-based measurement sampled at 1 MHz of a plasma ion fluctuation spectrum.
Cite
@article{arxiv.1808.04692,
title = {FPGA based demodulation of laser induced fluorescence in plasmas},
author = {Sean Mattingly and Fred Skiff},
journal= {arXiv preprint arXiv:1808.04692},
year = {2018}
}
Comments
Published in Review of Scientific Instruments. Final submitted version