SPRED spectrograph upgrade: High-resolution grating and improved absolute calibrations

B. C. Stratton; R. J. Fonck; K. Ida; K. P. Jaehnig; A. T. Ramsey

doi:10.1063/1.1138784

SPRED spectrograph upgrade: High-resolution grating and improved absolute calibrations

B. C. Stratton
, R. J. Fonck
, K. Ida
, K. P. Jaehnig
, A. T. Ramsey

PPPL NSTX

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

25 Scopus citations

Abstract

Two improvements to the SPRED multichannel VUV spectrographs used on the TFTR and PBX tokamaks have been made: (1) a new 2100-g/mm grating covering the 100-320-Å region with 0.4-Å resolution (FWHM) has been added to the existing 450-g/mm grating (100-1100 Å with 2-Å resolution), and (2) the TFTR SPRED has been absolutely calibrated using synchrotron radiation from the NBS SURF II facility, while the PBX system has been calibrated using conventional branching ratios along with line ratios from charge-exchange- recombination excited lines. The availability of high-resolution spectra in the 100-320-Å range provides improved measurements of metallic ion emissions and, when the instrument views across a neutral beam as in PBX, allows carbon and oxygen densities to be measured via charge-exchange-recombination spectroscopy.

Original language	English (US)
Pages (from-to)	2043-2045
Number of pages	3
Journal	Review of Scientific Instruments
Volume	57
Issue number	8
DOIs	https://doi.org/10.1063/1.1138784
State	Published - 1986

All Science Journal Classification (ASJC) codes

Instrumentation

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10.1063/1.1138784

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title = "SPRED spectrograph upgrade: High-resolution grating and improved absolute calibrations",

abstract = "Two improvements to the SPRED multichannel VUV spectrographs used on the TFTR and PBX tokamaks have been made: (1) a new 2100-g/mm grating covering the 100-320-{\AA} region with 0.4-{\AA} resolution (FWHM) has been added to the existing 450-g/mm grating (100-1100 {\AA} with 2-{\AA} resolution), and (2) the TFTR SPRED has been absolutely calibrated using synchrotron radiation from the NBS SURF II facility, while the PBX system has been calibrated using conventional branching ratios along with line ratios from charge-exchange- recombination excited lines. The availability of high-resolution spectra in the 100-320-{\AA} range provides improved measurements of metallic ion emissions and, when the instrument views across a neutral beam as in PBX, allows carbon and oxygen densities to be measured via charge-exchange-recombination spectroscopy.",

author = "Stratton, \{B. C.\} and Fonck, \{R. J.\} and K. Ida and Jaehnig, \{K. P.\} and Ramsey, \{A. T.\}",

year = "1986",

doi = "10.1063/1.1138784",

language = "English (US)",

volume = "57",

pages = "2043--2045",

journal = "Review of Scientific Instruments",

issn = "0034-6748",

publisher = "American Institute of Physics",

number = "8",

}

TY - JOUR

T1 - SPRED spectrograph upgrade

T2 - High-resolution grating and improved absolute calibrations

AU - Stratton, B. C.

AU - Fonck, R. J.

AU - Ida, K.

AU - Jaehnig, K. P.

AU - Ramsey, A. T.

PY - 1986

Y1 - 1986

N2 - Two improvements to the SPRED multichannel VUV spectrographs used on the TFTR and PBX tokamaks have been made: (1) a new 2100-g/mm grating covering the 100-320-Å region with 0.4-Å resolution (FWHM) has been added to the existing 450-g/mm grating (100-1100 Å with 2-Å resolution), and (2) the TFTR SPRED has been absolutely calibrated using synchrotron radiation from the NBS SURF II facility, while the PBX system has been calibrated using conventional branching ratios along with line ratios from charge-exchange- recombination excited lines. The availability of high-resolution spectra in the 100-320-Å range provides improved measurements of metallic ion emissions and, when the instrument views across a neutral beam as in PBX, allows carbon and oxygen densities to be measured via charge-exchange-recombination spectroscopy.

AB - Two improvements to the SPRED multichannel VUV spectrographs used on the TFTR and PBX tokamaks have been made: (1) a new 2100-g/mm grating covering the 100-320-Å region with 0.4-Å resolution (FWHM) has been added to the existing 450-g/mm grating (100-1100 Å with 2-Å resolution), and (2) the TFTR SPRED has been absolutely calibrated using synchrotron radiation from the NBS SURF II facility, while the PBX system has been calibrated using conventional branching ratios along with line ratios from charge-exchange- recombination excited lines. The availability of high-resolution spectra in the 100-320-Å range provides improved measurements of metallic ion emissions and, when the instrument views across a neutral beam as in PBX, allows carbon and oxygen densities to be measured via charge-exchange-recombination spectroscopy.

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UR - https://www.scopus.com/pages/publications/0007900159#tab=citedBy

U2 - 10.1063/1.1138784

DO - 10.1063/1.1138784

M3 - Article

AN - SCOPUS:0007900159

SN - 0034-6748

VL - 57

SP - 2043

EP - 2045

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 8

ER -

SPRED spectrograph upgrade: High-resolution grating and improved absolute calibrations

Abstract

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