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| == Experimental campaign == | | == Experimental campaign == |
| 2017 Spring
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| == Proposal title == | | == Proposal title == |
| '''Impurity injection by laser blow-off: influence of main ions charge/mass on impurity confinement and transport''' | | '''Enter Title here''' |
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| == Name and affiliation of proponent == | | == Name and affiliation of proponent == |
| B. López-Miranda1, B. Zurro1, M. Martínez1, E. Hollmann2, A. Baciero1, M. Ochando1, F. Medina1, K.J. McCarthy1 and TS and TJ-II Team.//
| | Enter name, affiliation and ORCID code here |
| 1 Laboratorio Nacional de Fusión, CIEMAT, Madrid, Spain.
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| 2 University of California, San Diego, La Jolla, CA, USA.
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| == Details of contact person at LNF (if applicable) ==
| | Suggested format: |
| B. López-Miranda: belen.lopez@ciemat.es
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| == Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)==
| | [https://orcid.org/0000-0000-0000-0000 John Doe], University of Ivory Tower |
| Motivation. In previous experiments of impurity confinement in TJ-II plasmas we have investigated the behaviour of impurity confinement with the mass composition of the main ions and with charge/mass of the injected impurities [1]. Now we want to extend our study to He plasmas.
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| Proposal. Within the present proposal, we plan to inject light and heavy impurities into TJ-II ECRH plasmas by means of laser blow-off. We plan to study the behaviour of impurity confinement with the charge/mass of the main ions on the relaxation of emission of light and heavy impurities injected in TJ-II. For that purpose we want discharges in He and study the impurity confinement as a function of effective mass.
| | == Details of contact person at LNF == |
| | If applicable, enter contact person here or write N/A |
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| == If applicable, International or National funding project or entity == | | == Description of the activity == |
| This work was funded by the Spanish “MINECO” under Grant No. ENE2014-56517-R. B.L.M. would like to acknowledge her scholarship, Grant No. BES-2015-075704.
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| | === Motivation and Background === |
| | Basic information to understand the relevance of the proposed experiments in the bigger context of fusion plasma research. You can use references, e.g, <ref>A. Einstein, Journal of Exceptional Results (2017)</ref>. |
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| | === Proposal Objectives === |
| | Specific objetives of this proposal within the context provided in Motivation and Background. |
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| | === Approach and Methodology === |
| | Basic description of the experimental approach to meet the proposal objectives (e.g. parameter scans, configuration variation, operation schemes). |
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| | == International or National funding project or entity == |
| | Include funding here (grants, national plans) |
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| == Description of required resources == | | == Description of required resources == |
| Required resources: | | Required resources: |
| * Number of plasma discharges or days of operation: We would need at least two operational days: one (compatible with other experiments) to adjust all the variables of the laser blow-off system and another day to perform the experiment. | | * Number of plasma discharges or days of operation: |
| * Essential diagnostic systems: Main diagnostics will be radiation diagnostics (bolometers, X-rays, VUV spectrometer, etc.) and ECR radiometer data as well as other diagnostics with good time resolution. | | * Essential diagnostic systems (without which, the proposal cannot be conducted): |
| * Type of plasmas (heating configuration): We need standard configuration plasmas (100_44_64). | | * Other diagnostic system of special interest: |
| | * Type of plasmas (heating and magnetic configuration): |
| * Specific requirements on wall conditioning if any: | | * Specific requirements on wall conditioning if any: |
| 1. We want discharges in He in order to study the impurity confinement as a function of effective mass.
| | * External users: need a local computer account for data access: yes/no |
| 2. We need discharges with solely ECRH and good control with constant density along discharges with at least three levels of ECRH power. Lower densities appear to give more stable target plasmas; however, we wish plasma electron densities that are sufficiently high to ensure good Thomson scattering profiling of the target plasma.
| | * Any external equipment to be integrated? Provide description and integration needs: |
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| * External users: need a local computer account for data access: N
| | == Preferred dates and degree of flexibility == |
| * Any external equipment to be integrated? Provide description and integration needs: N
| | Preferred dates: (format dd-mm-yyyy) |
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| == Preferred dates and degree of flexibility ==
| | (If remote participation is required or preferred, please, indicate it here. A Zoom connection with the local contact person will be arranged on the day of experiments.) |
| Preferred dates: (XX-03-2017)
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| We would like to perform the experiment during March 2017.
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| == References == | | == References == |
| <references />1. ZURRO B., HOLLMANN E., BACIERO A., OCHANDO M.A., MEDINA F., McCARTHY K.J. et al., “Transport studies using laser blow-off injection of low-Z trace impurities injected into the TJ-II stellarator”, Nuclear Fusion 51 (2011) 063015 (9pp). | | <references /> |
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| <hr> | | <hr> |
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| [[Category:TJ-II internal documents]] | | [[Category:TJ-II internal documents]] |
| [[Category:TJ-II experimental proposals]] | | [[Category:TJ-II experimental proposals Spring 2022]] |