2006
DOI: 10.1063/1.2229200
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Charge-exchange spectroscopic diagnostic for the TJ-II stellarator

Abstract: An instrumental and numerical method to determine the hydrogenic ratio in isotopic experiments in the TJ-II stellaratora) Rev. Sci. Instrum. 85, 11E405 (2014); 10.1063/1.4886417 Implementation of multifilter based twin-prototypes for core electron temperature measurements in the TJ-II stellaratora) Rev. Sci. Instrum. 81, 10D711 (2010); 10.1063/1.3478561 Multipulse supersonic helium beam diagnostic in the TJ-II stellarator Rev. Sci. Instrum. 75,

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Cited by 14 publications
(21 citation statements)
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“…With sufficient photon statistics this method is accurate in the order of the velocity resolution of the spectrometer (<1 km/s) and hence the best method to assure a valid measurement of small v pol . A similar system is used at the TJII stellarator [4]. In contrast to the common use of reference lines this method presents a direct measurement of the rest frame wavelength and is hence not prone to systematic errors, compensated here by the differential approach.The main systematic errors by using a reference line are angular deviations from misaligned mounting in front of the spectrometer, causing a strong shift in rotation velocity.…”
Section: Absolute Calibration For V Pol V Tor N Imentioning
confidence: 99%
See 1 more Smart Citation
“…With sufficient photon statistics this method is accurate in the order of the velocity resolution of the spectrometer (<1 km/s) and hence the best method to assure a valid measurement of small v pol . A similar system is used at the TJII stellarator [4]. In contrast to the common use of reference lines this method presents a direct measurement of the rest frame wavelength and is hence not prone to systematic errors, compensated here by the differential approach.The main systematic errors by using a reference line are angular deviations from misaligned mounting in front of the spectrometer, causing a strong shift in rotation velocity.…”
Section: Absolute Calibration For V Pol V Tor N Imentioning
confidence: 99%
“…v pol , v tor , T i and n i can be measured using the hydrogen beam RuDI [26,9,30]. Systems applying similar diagnostic beams are operated TJII stellarator [4] and TCV [27,11] The paper is organized as follows. In the first part of this paper the design parameters of the complete system are given.…”
Section: Introductionmentioning
confidence: 99%
“…Charge eXchange Recombination Spectroscopy (CXRS) is the usual technique used to determine T i at the plasma core [2,3], but only specialized systems can reach the plasma edge [4,5,6,7]. The CXRS system operating in TJ-II [3] has a high aperture spectrometer, but cannot measure the plasma outside ρ (normalized radius) > 0.8.…”
Section: Introductionmentioning
confidence: 99%
“…The CXRS system operating in TJ-II [3] has a high aperture spectrometer, but cannot measure the plasma outside ρ (normalized radius) > 0.8. Spectroscopic techniques based on a supersonic He beam have been able to obtain the relative radial temperature profile in the TJ-II plasma periphery, but it needs independent temperature data in the plasma interior in order to give absolute values [8].…”
Section: Introductionmentioning
confidence: 99%
“…The DNBI and toroidal light collection systems used for CXRS studies on TJ-II [22], with some slight modifications, are employed to undertake the measurements reported here. In the first instance, the compact DINA-5 injector, with an e −1 radius of 2.1 cm at focus, provides a 5 ms long pulse of neutral hydrogen accelerated to ≈30 keV.…”
Section: Tj-ii Mse Diagnosticmentioning
confidence: 99%