The Frascati Tokamak Upgrade Thomson scattering system: The optical and spectral analysis equipments

Pizzolati, P. L.; Briccola, M.; Garbi, M.; Golinelli, E.; Mezzetti, S.; Giorgetti, Gian Marco; Molesini, Giuseppe; Bartiromo, R.; Brusadin, A.; Giovannozzi, E.; Orsitto, F.; Santi, D.; Ferrario, A.; Bassan, M.

doi:10.1063/1.1143741

Cited by 18 publications

(3 citation statements)

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“…The electron temperature profile, Te(R), along an horizontal chord lying in the meridian plane is measured by the electron cyclotron emission (ECE) diagnostic [29, 301 with a time resolution of 5 ms. A Thomson scattering system [31] gives T e ( Z ) , for 10 time points, at 19 positions along a vertical chord passing through the geometrical centre of the vacuum chamber. The electron temperature is assumed to be constant over a flux surface and, from the relation between R (or 2) and p , we obtain Te(p).…”

Section: Experimental Arrangement and Data Reductionmentioning

confidence: 99%

Particle transport in the Frascati Tokamak upgrade

et al. 1996

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Three methods of density modulation have been used in FTU discharges (gas puffing, pellet injection and current rampup). The analysis of particle balance confirms that the neoclassical theory is not adequate and the experimental results obtained by the three methods are used to verify the validity of an empirical expression for the radial particle flux. Such an expression is relevant for the design of future experiments and constitutes a constraint for any satisfactory theory

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Section: Experimental Arrangement and Data Reductionmentioning

confidence: 99%

Particle transport in the Frascati Tokamak upgrade

et al. 1996

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“…[1][2][3][4][5] A similar system has recently been installed on NSTX 6 , with initial operation scheduled for July, 2000. This paper describes the design and lab performance of this electronics.…”

Section: Introductionmentioning

confidence: 99%

APD detector electronics for the NSTX Thomson scattering system

Johnson

LeBlanc

Long

et al. 2001

Review of Scientific Instruments

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An electronics system has been installed and tested for the readout of APD detectors for the NSTX Thomson scattering system. Similar to previous designs, it features preamps with a fast and a slow output. The fast output uses pulse shaping to optimize sensitivity for the 8 nsec scattered light pulse while rejecting noise in the intrinsic plasma background. A low readout noise of ~25 photoelectrons is achieved at an APD gain of 75. The design incorporates a number of features to provide flexibility for various modes of calibration.

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“…Avalanche photodiodes (APDs) have been used as detectors for a number of Thomson scattering systems employing Nd:YAG lasers at 1.06 mm. [1][2][3][4][5] A similar system has recently been installed on NSTX 6 , with initial operation scheduled for July, 2000. This paper describes the design and lab performance of this electronics.…”

Section: Introductionmentioning

confidence: 99%