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Scrape-off layer ion temperature measurements at the divertor target during type III ELMs in MAST measured by RFEA.

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Title: Scrape-off layer ion temperature measurements at the divertor target during type III ELMs in MAST measured by RFEA.
Authors: Elmore, S.1 Sarah.Elmore@ccfe.ac.uk, Allan, S.Y.1, Fishpool, G.1, Kirk, A.1, Kočan, M.2, Tamain, P.3, Thornton, A.J.1
Source: Journal of Nuclear Materials. Aug2015, Vol. 463, p889-892. 4p.
Subjects: Tokamaks, Fusion reactors, Pinch effect (Physics), Plasma confinement devices, Ion temperature
Abstract: Edge-localised modes (ELMs) can carry significant fractions of their energy as far as main chamber plasma-facing components in divertor tokamaks. Since in future devices (e.g. ITER, DEMO) these energies could cause issues for material lifetime and impurity production, the energy and temperature of ions in ELMs needs to be investigated. In MAST, novel divertor measurements of T i during ELMs have been made using the divertor retarding field energy analyser (RFEA) probe. These measurements have shown instantaneous ion energy distributions corresponding to an effective T i at 5 cm from the strike point at the target that can be as high as 60 eV and that this decreases with time after the ELM start. This is consistent with the hottest, fastest ions arriving at the target first by parallel transport, followed by the lower end of the ion energy distribution. This analysis will form a basis for future data analysis of fast swept measurements of ion distributions in ELMs. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Nuclear Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 103407576
AccessLevel: 6
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PubTypeId: academicJournal
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  Label: Title
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  Data: Scrape-off layer ion temperature measurements at the divertor target during type III ELMs in MAST measured by RFEA.
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  Data: <searchLink fieldCode="AR" term="%22Elmore%2C+S%2E%22">Elmore, S.</searchLink><relatesTo>1</relatesTo><i> Sarah.Elmore@ccfe.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Allan%2C+S%2EY%2E%22">Allan, S.Y.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Fishpool%2C+G%2E%22">Fishpool, G.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kirk%2C+A%2E%22">Kirk, A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kočan%2C+M%2E%22">Kočan, M.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Tamain%2C+P%2E%22">Tamain, P.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Thornton%2C+A%2EJ%2E%22">Thornton, A.J.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Nuclear+Materials%22">Journal of Nuclear Materials</searchLink>. Aug2015, Vol. 463, p889-892. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Tokamaks%22">Tokamaks</searchLink><br /><searchLink fieldCode="DE" term="%22Fusion+reactors%22">Fusion reactors</searchLink><br /><searchLink fieldCode="DE" term="%22Pinch+effect+%28Physics%29%22">Pinch effect (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+confinement+devices%22">Plasma confinement devices</searchLink><br /><searchLink fieldCode="DE" term="%22Ion+temperature%22">Ion temperature</searchLink>
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  Data: Edge-localised modes (ELMs) can carry significant fractions of their energy as far as main chamber plasma-facing components in divertor tokamaks. Since in future devices (e.g. ITER, DEMO) these energies could cause issues for material lifetime and impurity production, the energy and temperature of ions in ELMs needs to be investigated. In MAST, novel divertor measurements of T i during ELMs have been made using the divertor retarding field energy analyser (RFEA) probe. These measurements have shown instantaneous ion energy distributions corresponding to an effective T i at 5 cm from the strike point at the target that can be as high as 60 eV and that this decreases with time after the ELM start. This is consistent with the hottest, fastest ions arriving at the target first by parallel transport, followed by the lower end of the ion energy distribution. This analysis will form a basis for future data analysis of fast swept measurements of ion distributions in ELMs. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Journal of Nuclear Materials is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.jnucmat.2014.09.039
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      – Code: eng
        Text: English
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        PageCount: 4
        StartPage: 889
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      – SubjectFull: Tokamaks
        Type: general
      – SubjectFull: Fusion reactors
        Type: general
      – SubjectFull: Pinch effect (Physics)
        Type: general
      – SubjectFull: Plasma confinement devices
        Type: general
      – SubjectFull: Ion temperature
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      – TitleFull: Scrape-off layer ion temperature measurements at the divertor target during type III ELMs in MAST measured by RFEA.
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              Text: Aug2015
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              Value: 463
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