Upgrading a high-throughput spectrometer for high-frequency (<400 kHz) measurements

T. Nishizawa; M. D. Nornberg; D. J. Den Hartog; D. Craig

doi:10.1063/1.4960073

Upgrading a high-throughput spectrometer for high-frequency (<400 kHz) measurements

T. Nishizawa, M. D. Nornberg, D. J. Den Hartog, D. Craig

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The upgraded spectrometer used for charge exchange recombination spectroscopy on the Madison Symmetric Torus resolves emission fluctuations up to 400 kHz. The transimpedance amplifier's cutoff frequency was increased based upon simulations comparing the change in the measured photon counts for time-dynamic signals. We modeled each signal-processing stage of the diagnostic and scanned the filtering frequency to quantify the uncertainty in the photon counting rate. This modeling showed that uncertainties can be calculated based on assuming each amplification stage is a Poisson process and by calibrating the photon counting rate with a DC light source to address additional variation.

Original language	English
Article number	11E530
Journal	Review of Scientific Instruments
Volume	87
Issue number	11
DOIs	https://doi.org/10.1063/1.4960073
Publication status	Published - Nov 1 2016
Externally published	Yes

All Science Journal Classification (ASJC) codes

Instrumentation

Access to Document

10.1063/1.4960073

Cite this

@article{fa1158694f1e45bcbceeef5312d8ef51,

title = "Upgrading a high-throughput spectrometer for high-frequency (<400 kHz) measurements",

abstract = "The upgraded spectrometer used for charge exchange recombination spectroscopy on the Madison Symmetric Torus resolves emission fluctuations up to 400 kHz. The transimpedance amplifier's cutoff frequency was increased based upon simulations comparing the change in the measured photon counts for time-dynamic signals. We modeled each signal-processing stage of the diagnostic and scanned the filtering frequency to quantify the uncertainty in the photon counting rate. This modeling showed that uncertainties can be calculated based on assuming each amplification stage is a Poisson process and by calibrating the photon counting rate with a DC light source to address additional variation.",

author = "T. Nishizawa and Nornberg, {M. D.} and {Den Hartog}, {D. J.} and D. Craig",

note = "Funding Information: This work is supported by the U.S. Department of Energy, Office of Science, and Office of Fusion Energy Sciences under Award No. DE-FC02-05ER54814. Publisher Copyright: {\textcopyright} 2016 Author(s).",

year = "2016",

month = nov,

day = "1",

doi = "10.1063/1.4960073",

language = "English",

volume = "87",

journal = "Review of Scientific Instruments",

issn = "0034-6748",

publisher = "American Institute of Physics Publising LLC",

number = "11",

}

TY - JOUR

T1 - Upgrading a high-throughput spectrometer for high-frequency (<400 kHz) measurements

AU - Nishizawa, T.

AU - Nornberg, M. D.

AU - Den Hartog, D. J.

AU - Craig, D.

N1 - Funding Information: This work is supported by the U.S. Department of Energy, Office of Science, and Office of Fusion Energy Sciences under Award No. DE-FC02-05ER54814. Publisher Copyright: © 2016 Author(s).

PY - 2016/11/1

Y1 - 2016/11/1

N2 - The upgraded spectrometer used for charge exchange recombination spectroscopy on the Madison Symmetric Torus resolves emission fluctuations up to 400 kHz. The transimpedance amplifier's cutoff frequency was increased based upon simulations comparing the change in the measured photon counts for time-dynamic signals. We modeled each signal-processing stage of the diagnostic and scanned the filtering frequency to quantify the uncertainty in the photon counting rate. This modeling showed that uncertainties can be calculated based on assuming each amplification stage is a Poisson process and by calibrating the photon counting rate with a DC light source to address additional variation.

AB - The upgraded spectrometer used for charge exchange recombination spectroscopy on the Madison Symmetric Torus resolves emission fluctuations up to 400 kHz. The transimpedance amplifier's cutoff frequency was increased based upon simulations comparing the change in the measured photon counts for time-dynamic signals. We modeled each signal-processing stage of the diagnostic and scanned the filtering frequency to quantify the uncertainty in the photon counting rate. This modeling showed that uncertainties can be calculated based on assuming each amplification stage is a Poisson process and by calibrating the photon counting rate with a DC light source to address additional variation.

UR - http://www.scopus.com/inward/record.url?scp=84983613502&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84983613502&partnerID=8YFLogxK

U2 - 10.1063/1.4960073

DO - 10.1063/1.4960073

M3 - Article

AN - SCOPUS:84983613502

SN - 0034-6748

VL - 87

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 11

M1 - 11E530

ER -

Upgrading a high-throughput spectrometer for high-frequency (<400 kHz) measurements

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this