Status of ITER neutral beam cell remote handling system

Sykes, N.; Belcher, C.; Choi, Changhwan; Crofts, Oliver; Crowe, R.D.; Damiani, Carlo; Delavalle, S.; Meredith, Lauren; Mindham, T.; Raimbach, J.; Tesini, A.; Uffelen, Marco Van

doi:10.1016/j.fusengdes.2013.02.087

Cited by 15 publications

(6 citation statements)

References 2 publications

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“…Therefore, stringent criteria for designing systems, material selection and corresponding restrictions are implemented for incorporating any components in the system, including diagnostic systems. Non-invasive diagnostic approach is needed to avoid prolonged machine downtime due to frequent expensive maintenance [10]. In built-to-print (BTP) design of ITER NBIs, all the NBI components including the beam source (BS) is housed inside a vacuum chamber, which is a part of primary vacuum boundary of the ITER machine.…”

Section: Introductionmentioning

confidence: 99%

RF generator interlock by plasma grid bias current – An alternate to Hα interlock

Bandyopadhyay

Gahlaut

Yadav

et al. 2017

AIP Conference Proceedings

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Section: Introductionmentioning

confidence: 99%

RF generator interlock by plasma grid bias current – An alternate to Hα interlock

Bandyopadhyay

Gahlaut

Yadav

et al. 2017

AIP Conference Proceedings

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“…Therefore, stringent criteria for material selection and restrictions are implemented for incorporating any components in the system, including diagnostic systems. Non-invasive diagnostic approach is needed to avoid prolonged machine downtime due to frequent expensive maintenance [10].…”

Section: Introductionmentioning

confidence: 99%

Plasma density estimation of a fusion grade ICP source through electrical parameters of the RF generator circuit

2015

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An inductively coupled plasma (ICP) based negative hydrogen ion source is chosen for ITER neutral beam (NB) systems. To avoid regular maintenance in a radioactive environment with high flux of 14 MeV neutrons and gamma rays, invasive plasma diagnostics like probes are not included in the ITER NB source design. While, optical or microwave based diagnostics which are normally used in other plasma sources, are to be avoided in the case of ITER sources due to the overall system design and interface issues. In such situation, alternative forms of assessment to characterize ion source plasma become a necessity. In the present situation, the beam current through the extraction system in the ion source is the only measurement which indicates plasma condition inside the ion source. However, beam current not only depends on the plasma condition near the extraction region but also on the perveance condition and negative ion stripping. Apart from that, the ICP production region radio frequency (RF) driver region) is placed far (∼30 cm) from the extraction region. Therefore, there are uncertainties involved in linking the beam current with plasma properties inside the RF driver. To maintain the optimum condition for source operation it is necessary to maintain the optimum conditions in the driver. A method of characterization of the plasma density in the driver without using any invasive or non-invasive probes could be a useful tool to achieve that objective. Such a method, which is exclusively for ICP based ion sources, is presented in this paper. In this technique, plasma density inside the RF driver is estimated through the measurements of the electrical parameters in the RF power supply circuit path. Monitoring RF driver plasma through the described route will be useful during the source commissioning phase and also in the beam operation phase.

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“…The Monorail Crane forms part of the ITER Neutral Beam Cell Remote Handling System, for which the Conceptual Design Review has just been completed. The status of the System design by CCFE is the subject of a paper presented at the SOFT 2012 conference; Sykes [1].…”

Section: Introductionmentioning

confidence: 99%

Applying remote handling attributes to the ITER neutral beam cell monorail crane

Crofts

Allan

Raimbach

et al. 2013

Fusion Engineering and Design

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The maintenance requirements for the equipment in the ITER Neutral Beam Cell requires components to be lifted and transported within the cell by remote means. To meet this requirement, the provision of an overhead crane with remote handling capabilities has been initiated. The layout of the cell has driven the design to consist of a monorail crane that travels on a branched monorail track attached to the cell ceiling. This paper describes the principle design constraints and how the remote handling attributes were applied to the concept design of the monorail crane, concentrating on areas where novel design solutions have been required and on the remote recovery requirements and solutions.

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Status of ITER neutral beam cell remote handling system

Cited by 15 publications

References 2 publications

RF generator interlock by plasma grid bias current – An alternate to Hα interlock

RF generator interlock by plasma grid bias current – An alternate to Hα interlock

Plasma density estimation of a fusion grade ICP source through electrical parameters of the RF generator circuit

Applying remote handling attributes to the ITER neutral beam cell monorail crane

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