Fast charged-coupled device spectrometry using zoom-wavelength optics

G. Carolan; N. J. Conway; C. A. Bunting; P. Leahy; R. O'Connell; R. Huxford; C. R. Negus; P. D. Wilcock

doi:10.1063/1.1147924

Fast charged-coupled device spectrometry using zoom-wavelength optics

G. Carolan
, N. J. Conway
, C. A. Bunting
, P. Leahy
, R. O'Connell
, R. Huxford
, C. R. Negus
, P. D. Wilcock

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

Abstract

Fast charge-coupled device (CCD) detector arrays placed at the output of visible spectrometers are used for multichord Doppler shift analyses on the COMPASS-D and START tokamaks. Unequal magnification in the horizontal and vertical axes allows for optimal matching of throughput and spectral resolution at the CCD detector. This involves cylindrical lenses in an anamorphic mounting. Optical acuity is preserved over a very wide range of wavelengths (220 nm→700 nm) by separate repositioning of all the optical elements which is accomplished by the use of zoom mechanisms. This facilitates rapid changes of wavelength allowing edge and core observations depending on the location of the emitting impurity ions. Changes to the ion temperature and velocity are recorded using 20 chords simultaneously with typical accuracies of Δv_i<1 km s^-1 and ΔT_i/T_i<10% with a time resolution of <1 ms.

Original language	English
Pages (from-to)	1015-1018
Number of pages	4
Journal	Review of Scientific Instruments
Volume	68
Issue number	1
DOIs	https://doi.org/10.1063/1.1147924
Publication status	Published - Jan 1997

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10.1063/1.1147924

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title = "Fast charged-coupled device spectrometry using zoom-wavelength optics",

abstract = "Fast charge-coupled device (CCD) detector arrays placed at the output of visible spectrometers are used for multichord Doppler shift analyses on the COMPASS-D and START tokamaks. Unequal magnification in the horizontal and vertical axes allows for optimal matching of throughput and spectral resolution at the CCD detector. This involves cylindrical lenses in an anamorphic mounting. Optical acuity is preserved over a very wide range of wavelengths (220 nm→700 nm) by separate repositioning of all the optical elements which is accomplished by the use of zoom mechanisms. This facilitates rapid changes of wavelength allowing edge and core observations depending on the location of the emitting impurity ions. Changes to the ion temperature and velocity are recorded using 20 chords simultaneously with typical accuracies of Δvi<1 km s-1 and ΔTi/Ti<10\% with a time resolution of <1 ms.",

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doi = "10.1063/1.1147924",

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T1 - Fast charged-coupled device spectrometry using zoom-wavelength optics

AU - Carolan, G.

AU - Conway, N. J.

AU - Bunting, C. A.

AU - Leahy, P.

AU - O'Connell, R.

AU - Huxford, R.

AU - Negus, C. R.

AU - Wilcock, P. D.

PY - 1997/1

Y1 - 1997/1

N2 - Fast charge-coupled device (CCD) detector arrays placed at the output of visible spectrometers are used for multichord Doppler shift analyses on the COMPASS-D and START tokamaks. Unequal magnification in the horizontal and vertical axes allows for optimal matching of throughput and spectral resolution at the CCD detector. This involves cylindrical lenses in an anamorphic mounting. Optical acuity is preserved over a very wide range of wavelengths (220 nm→700 nm) by separate repositioning of all the optical elements which is accomplished by the use of zoom mechanisms. This facilitates rapid changes of wavelength allowing edge and core observations depending on the location of the emitting impurity ions. Changes to the ion temperature and velocity are recorded using 20 chords simultaneously with typical accuracies of Δvi<1 km s-1 and ΔTi/Ti<10% with a time resolution of <1 ms.

AB - Fast charge-coupled device (CCD) detector arrays placed at the output of visible spectrometers are used for multichord Doppler shift analyses on the COMPASS-D and START tokamaks. Unequal magnification in the horizontal and vertical axes allows for optimal matching of throughput and spectral resolution at the CCD detector. This involves cylindrical lenses in an anamorphic mounting. Optical acuity is preserved over a very wide range of wavelengths (220 nm→700 nm) by separate repositioning of all the optical elements which is accomplished by the use of zoom mechanisms. This facilitates rapid changes of wavelength allowing edge and core observations depending on the location of the emitting impurity ions. Changes to the ion temperature and velocity are recorded using 20 chords simultaneously with typical accuracies of Δvi<1 km s-1 and ΔTi/Ti<10% with a time resolution of <1 ms.

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Fast charged-coupled device spectrometry using zoom-wavelength optics

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