2005
DOI: 10.1143/jjap.44.383
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Multiposition Multipass Thomson Scattering Diagnostic for Tokamak NOVA-UNICAMP

Abstract: In this article, the use of an 8×8-matrix independent 10-stage dynode multichannel photomultiplier for multipass Thomson scattering is described. Light from a pulsed ruby laser is irradiated 12 times in the central region of plasma using the resonator cavity of a multipass system, and integrated scattered light is detected for the first time using the multichannel photomultiplier XP1752 from Philips. The simultaneous measurements of electron temperature and density at four spatial positions, which can be exten… Show more

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Cited by 3 publications
(3 citation statements)
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“…Finally, the maximum measured temperatures ͑60-70 eV͒ are equal to the central electron temperature determined by Thomson scattering. 10 All these observations prove the efficacy of the ion measurements using the multichannel detector system in the VUV spectrum.…”
mentioning
confidence: 61%
“…Finally, the maximum measured temperatures ͑60-70 eV͒ are equal to the central electron temperature determined by Thomson scattering. 10 All these observations prove the efficacy of the ion measurements using the multichannel detector system in the VUV spectrum.…”
mentioning
confidence: 61%
“…The and values were obtained from Thomson scattering measurements [14], the excitation rate coefficients were taken from [11], and the total emissivity of the and were calculated from simultaneous measurements of the OIII 70.3 and 83.4-nm line emissions, respectively.…”
Section: B Br and Mbr Methodsmentioning
confidence: 99%
“…11 At the limiter position, electron temperature and density, obtained with Langmuir probe, are T e Ϸ 10 eV and n e Ϸ 2.5ϫ 10 12 cm −3 , respectively. This is a small machine with 30 cm major radius and 6 cm minor radius.…”
Section: Introductionmentioning
confidence: 96%