1 3rd meeting Working Group 5. 2 Agenda WG5 2nd Meeting Agenda: Discuss existing proposals Indicate...
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Transcript of 1 3rd meeting Working Group 5. 2 Agenda WG5 2nd Meeting Agenda: Discuss existing proposals Indicate...
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3rd meeting3rd meetingWorking Group 5Working Group 5
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Agenda WG5 2nd MeetingAgenda WG5 2nd Meeting
Agenda:
Discuss existing proposals
Indicate missing proposals
Allocate persons to develop proposals until July meeting
Overlap with other WGs
Dates / Miscellaneous
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Exiting ProposalsExiting Proposals
WG5.1 Reducing W sputtering by GD nitride formation (P. Tabares)
Needs further elaboration, closely connected to WG10.15,WG10.18
May be moved to WG10, Request for possibility of N GDC passed to operator
WG5.2 Monitoring of intrinsic impurity content (G. Maddison, H. Weisen et al.)
quite elaborated, using ‘monitoring’ discharges, partly parasitic,
WG5.3 Develop and Optimise Fuelling Techniques to Control/Avoid Tungsten
Accumulation (D. Frigione et al.)
some elaboration needed, could accommodate influence of seeding gas,
closely connected to WG5.6
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Exiting ProposalsExiting Proposals
WG5.4 Determination and control of the intrinsic impurity composition in the
full W divertor (S. Brezinsek)
Needs further elaboration, could accommodate influence of seeding gas,
closely connected to WG10.17 and WG10.20
WG5.5 Characterisation of evolution of C, Be and other light impurities
concentration (C. Giroud)
Mostly parasitic, may be merged into WG5.2
WG5.6 Characterisation and control of impurity production, transport and
contamination(C. Giroud)
some elaboration needed, use of trace injections, complements for tungsten
WG5.3 (concentrates on sources and edge transport, but for all intrinsic
impurities)
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Exiting ProposalsExiting Proposals
WG5.4 Determination and control of the intrinsic impurity composition in the
full W divertor (S. Brezinsek et al.)
Needs further elaboration, could accommodate influence of seeding gas,
closely connected to WG10.17 and WG10.20
WG5.5 Characterisation of evolution of C, Be and other light impurities
concentration (C. Giraud)
Mostly parasitic, may be merged into WG5.2
WG5.6 Characterisation and control of impurity production, transport and
contamination(C. Giraud)
some elaboration needed, use of trace injections, complements for tungsten
WG5.3 (concentrates on sources and edge transport, but for all intrinsic
impurities)
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• WG5.7 Study of central heating techniques to minimise/prevent Tungsten accumulation (D. Frigione et al.)
some elaboration needed, can partly performed jointly with WG 2.1 and WG 3.4
• WG5.8 W Divertor Retention (R. Dux et al.)
some elaboration needed, can partly performed jointly with WG 5.4, 5.6 and and WG10.17, 10.20
• WG5.9 Conditions for tungsten peaking and accumulation (H. Weisen et al.)
quite elaborated, prerequisite for WG5.3 and WG5.7
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Projection of ideas to proposalsProjection of ideas to proposals
• WG5.1x: 2.1,2.2 WG 5.2 (WG 5.5)
Behaviour of Be concentrations (in comparison to C with C wall), use reference discharges from pre ILW campaigns• WG5.2x: 2.3 WG 2.1, WG 5.6
Behaviour of Be influxes, concentrations in different RF heated scenarios (in comb. with WG5.5x)• WG5.3x: 3.1 WG 5.2
Monitor W influxes, concentrations in different discharge scenarios (mostly parasitic)• WG5.4x: 3.2 WG 5.8, WG 5.6
Role of ELMs for W concentrations• WG5.5x: 3.3 WG 5.8
W divertor retention, role horiz./vert. target (bulk/coating)• WG5.5x: 3.4 WG 5.9
Conditions for W peaking /accumulations• WG5.5x: 3.5 WG 2.1, WG 5.6
Behaviour of W influxes, concentrations in different RF heated scenarios (in comb. with WG5.2x),• WG5.6x: 3.5 WG 5.9, WG 5.7
Develop RF heated scenarios for W accumulation mitigation• WG5.7x: 3.6 WG 2.1, WG 5.6
Compatibility of W mitigation compatible with other ICRH application goals• WG5.8x: 4.1 WG 10.17, 10.20, WG5.8, WG 5.4 change of transport should be covered explicitly
Monitor intrinsic impurity influxes and concentrations in different impurity seeded discharge.
Perform specific discharges to disentangle source and transport effects• WG5.9x: 5.1 WG 5.6
Monitor intrinsic impurity influxes and concentrations for different ELM mitigation techniques. Perform specific discharges to disentangle source and transport effects
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Missing Items
Role of transport change in seeded scenarios (N/Ne/Ar)
Integration to find optimum with respect to impurity sources / transport and plasma performance
Close links to WG 14!
How do the tools extrapolate to ITER?
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Additional overlap with other WGsAdditional overlap with other WGs
WG 6.18 Comparison of plasmas with strong Be evaporation and Be first
wall with respect to impurity concentrations, content and fluxes
(S. Brezinsek)
WG10.15 W erosion amelioration due to nitride formation at the target plates
WG10.17 W and Be erosion due to extrinsic impurities injected into main
chamber and divertor
WG10.18 Study of BeN formation in the main chamber and divertor with
usage of N as seeding species
WG10.20 Be and W erosion in plasmas with combined seeding of N and
Ne/Ar - synergetic effects
Rest: see links on WG5 Wiki page
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Wishlist for elaboration of proposalsWishlist for elaboration of proposals
• Approximate number of sessions• Heating scenarios / power• Current / field• Shaping• Scarces resources
Define milestones for execution of proposals
Allow TFLs estimate for needed session
Allow TFLs draft of execution sequence
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MiscellaneousMiscellaneous
Dates for next meeting:
E1/E2 review meeting:
8/9 July How
28/07/2010 13:00 K1/0/38