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He important: reactor ash, theory test Scarce data for He: D-IIID, JT-60U, NSTX, JET? else? Need for review of fossil data and recent, new experiments (Even old data relevant in light of new theory) Questions: Transport coefficients in H-mode, hybrid, ITB, L-mode

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discussion he experiments and database

He important: reactor ash, theory test

Scarce data for He: D-IIID, JT-60U, NSTX, JET? else?

Need for review of fossil data and recent, new experiments

(Even old data relevant in light of new theory)

Questions:

Transport coefficients in H-mode, hybrid, ITB, L-mode

Is He profile more/less peaked than ne (and in what conditions)?

What causes abrupt changes in V/D, when other plasma parameters appear to changes slowly?

...

Compile available data and interact with theoreticians to guide future experiments

Discussion:He experiments and database

ITPA Transport TG meeting, March 2010, Culham

he impurity wishlist

Steady-state He profiles with He as minority (few %) in

H-mode, hybrid, ITB, L-mode

With mainly ion heating, with mainly electron heating (ITG/TEM)

Wide range of parameters (eff, , *, q, Rdq/dr, …)

Extend to other ‘easy’ impurities (C, B – also constrain theory!)

Profiles of fitted transport parameters, if available from modulation or gas puff experiments

Together with profiles of relevant physical parameters, as in ITPA profile database (at least Te, Ti, ne, q, Rint, Rout, pol, , , Jacobians & metric coefficients) and usual scalar data.

Other impurities if available, other transport channels if available.

Format less important than data themselves …but using same format easier (profile database?)

He/impurity wishlist

ITPA Transport TG meeting, March 2010, Culham

he other impurities proposed actions

Start with reasonably modest objectives, e.g. mainly He (and low Z) steady state profile survey as a first step

Designate RO’s and participating devices

Designate coordinator to merge data into single database

Identify volunteer theoreticians and modellers

‘Negotiate’ extent of data to be supplied to coordinator & format

Assemble database of existing data, make accessible to ITPA

Assess database for gaps, propose experiments

Analyse empirically and report at TTG meeting

Model using linear and non-linear GK models : are trends reproduced? Report at TTG meeting.

When sufficient relevant material available, publish

He & other impurities: proposed actions

ITPA Transport TG meeting, March 2010, Culham

he other impurities participants
He & other impurities: participants

ITPA Transport TG meeting, March 2010, Culham