Responsivity calibration of the LoWEUS spectrometer

Lepson, J. K.; Beiersdorfer, P.; Kaita, R.; Majeski, R.; Boyle, D.

doi:10.1063/1.4960729

Responsivity calibration of the LoWEUS spectrometer

Journal Article · Fri Sep 02 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4960729· OSTI ID:1349666

Lepson, J. K. ^[1]; ^[2]; Kaita, R. ^[3]; Majeski, R. ^[3]; ^[3]

Univ. of California, Berkeley, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

We performed an in situ calibration of the relative responsivity function of the Long-Wavelength Extreme Ultraviolet Spectrometer (LoWEUS), while operating on the Lithium Tokamak Experiment (LTX) at Princeton Plasma Physics Laboratory. The calibration was accomplished by measuring oxygen lines, which are typically present in LTX plasmas. The measured spectral line intensities of each oxygen charge state were then compared to the calculated emission strengths given in the CHIANTI atomic database. Normalizing the strongest line in each charge state to the CHIANTI predictions, we obtained the differences between the measured and predicted values for the relative strengths of the other lines of a given charge state. We find that a 3rd degree polynomial function provides a good fit to the data points. Lastly, our measurements show that the responsivity between about 120 and 300 Å varies by factor of ~30.

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-09CH11466; AC52-07NA27344

OSTI ID:: 1349666

Alternate ID(s):: OSTI ID: 1400102
OSTI ID: 22596393

Report Number(s):: LLNL-JRNL--698642

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 11 Vol. 87; ISSN 0034-6748; ISSN RSINAK

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

References (10)

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Photometric calibration of an EUV flat field spectrometer at the advanced light source May, M.; Lepson, J.; Beiersdorfer, P. Review of Scientific Instruments, Vol. 74, Issue 3 https://doi.org/10.1063/1.1535247	journal	March 2003
Vacuum ultraviolet impurity spectroscopy on the Alcator C-Mod tokamak Reinke, M. L.; Beiersdorfer, P.; Howard, N. T. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3494380	journal	October 2010
High-resolution time-resolved extreme ultraviolet spectroscopy on NSTX Lepson, J. K.; Beiersdorfer, P.; Clementson, J. Review of Scientific Instruments, Vol. 83, Issue 10 https://doi.org/10.1063/1.4731753	journal	October 2012
Emission‐Line Spectra of Ar ix –Ar xvi in the Soft X‐Ray Region 20–50 A Lepson, J. K.; Beiersdorfer, P.; Behar, E. The Astrophysical Journal, Vol. 590, Issue 1 https://doi.org/10.1086/374980	journal	June 2003
Emission‐Line Spectra of S vii –S xiv in the 20–75 A Wavelength Region Lepson, J. K.; Beiersdorfer, P.; Behar, E. The Astrophysical Journal, Vol. 625, Issue 2 https://doi.org/10.1086/429879	journal	June 2005
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Measuring plasma impurities in Alcator C-Mod as a function of time in the extreme ultraviolet ¹ This article is part of a Special Issue on the 10th International Colloquium on Atomic Spectra and Oscillator Strengths for Astrophysical and Laboratory Plasmas. Beiersdorfer, P.; Brown, G. V.; Kamp, J. B. Canadian Journal of Physics, Vol. 89, Issue 5 https://doi.org/10.1139/p10-102	journal	May 2011

Cited By (2)

Electron-density-sensitive Line Ratios of Fe xiii– xvi from Laboratory Sources Compared to CHIANTI Weller, M. E.; Beiersdorfer, P.; Soukhanovskii, V. A. The Astrophysical Journal, Vol. 854, Issue 2 https://doi.org/10.3847/1538-4357/aaa5a1	journal	February 2018
EUV Spectra and Line Ratios of Multiply Ionized Calcium and Argon Atoms in a Laboratory Plasma Träbert, Elmar; Beiersdorfer, Peter; Lepson, Jaan K. The Astrophysical Journal, Vol. 865, Issue 2 https://doi.org/10.3847/1538-4357/aadba7	journal	October 2018

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