ITPA - IOS st Oct Kyoto E. Joffrin JET programme with the ILW in and relations with the IOS Joint experiments

ITPA - IOS st Oct Kyoto JanFebMarAprMayJunJulAugSepOctNovDec 2011 C28 C C29 C30a C30bC30c Shutdown Campaigns in Pump-down 15 May st plasma 24 th Aug d (80d) R1 C28A (15d) R2 C28B (10d) R3 C28C H-mode ( 3d ) R4a C29 Ohmic 11 sessions Done! L-mode R4b 182 experimental days in C28-C29-C30. Detailed plan established for C28-C29. C30 to be consolidated in the Programme meeting of the 30 th Nov to 2 nd Dec 2012 Restart blocks interleaved with Campaign C28 blocks. JET Campaigns in

ITPA - IOS st Oct Kyoto C28a campaign First plasma on the 24th of August then R1 (~50 pulses) Campaign C28a: 01(late)-09 Sept 2011 – in second restart R2 since  11 shifts devoted to a single experiment: Initial first wall Be erosion, Be and W material mixing and fuel retention  Discharges (2MA, 2T, low  ) were similar to reference discharges in C Critical issues:  Runaway Electron beam created at the plasma start-up and caused small local melting of Be  Gas balance accuracy under examination.  W UFOs in first plasmas (cleaned up with time + shape optimisation) Technical issues:  Power supplies issues are delaying the first NBI into plasma.

ITPA - IOS st Oct Kyoto Discharge Evolution divertor flat-top f rad ~32% f GW ~30% T e (0) IpIp BTBT neLneL fuelling rate P rad One X-point, one flat top and one termination scenario validated for this campaign

ITPA - IOS st Oct Kyoto

R1 C28a R2 C28b R3 C28c Objective/expected results First ohmic scenario: Ex limiter phase, X-point formation and low shape More shapes + PPCC: HT3, V5, SFE PIW end-to-end tests NBI8, ICRH, LH ICRH coupling: Ex Intrinsic impurity composition: Ex First disruption studies: Ex Be & W power handling: Ex1.2.3 / Ex H-mode qualification with ILW: Ex Baseline H-mode at 2.5MA (1 st ): Ex ICRH coupling: Ex Characterisation of heat load: Ex Disruption heat load: Ex L-H threshold study with ILW: Ex:3.2.1 Bulk W tile power handling: Ex WALLs energy limits NBI4 + PEWS2, shinethrough Increased ICRH + ECT VDE tests. Building blocks/integration items C28 campaigns in 2011 Week Week We are Here L-mode qualification: Ex First H-mode attempts: Ex IOS-5.2 IOS-1.0

ITPA - IOS st Oct Kyoto R4 C29 Objective/expected results Building blocks/integration items PIW/VTM cause identification EFCC controller NBI to 100kV (25MW) Baseline H-mode at 2.5MA : Ex Plasma shape with EFCC: Ex Be tile power handling: Ex Disruption mitigation: Ex W screening and control: Ex: L-H threshold study with ILW: Ex:3.2.1 Characterisation of heat load: Ex Bulk W tile power handling: Ex Near upper null operation: Ex Fuelling and seeding studies: Ex Type III ELM scenario (<2.5MA): Ex Current profile access and overlap domain: Ex Near upper null characterisation: Ex:1.2.2 Disruption mitigation: Ex:3.3.2 Bulk W tile power handling: Hybrid scenario development (1 st ): Ex Baseline to high current (1 st ): Ex ELM mitigation studies: Ex:2.2.7, Ex ELM mitigation studies: Ex:2.2.7, Ex:2.2.8, Ex-2.2.9, Ex C29 campaign IOS-2.1 IOS-4.1 & IOS-3.2 IOS-1.0 Integration of seeding in scenario: Ex IOS-2.1

ITPA - IOS st Oct Kyoto For more detailed information, please consult (requires JET password): TFE1 and E2 website: Timeline: Experiments in relation with IOS Joint experimentsIOSStarting date Develop H-mode baseline at 2.5MA: Ex Baseline H-mode to high current: Ex November 2011 February 2012 Hybrid scenario development: Ex February 2012 Current profile access and overlap domain: Ex & 3.2February 2012 Fuelling and seeding studies: Ex Integration of seeding techniques: Ex December 2011 February 2012 Characterisation of ICRH with the ILW: Ex October 2011 Most of the scenario experiments should be started by the time of the next IOS ITPA meeting: Link with IOS Joint experiments

ITPA - IOS st Oct Kyoto IOSObjectives Starting date IOS-1.0 Ex (10 sessions) (Bucalossi/Neu)  Qualify and document the baseline scenario (H-mode) in terms of access conditions and confinement quality.  Qualify the response to gas fuelling including the access to good confinement at high density Ex (10 sessions) (Rimini/Joffrin)  Study H-mode at the lowest  * and *.  Study the pedestal contribution to confinement.  End to end demonstration of the ITER baseline scenario Nov Feb 2012 IOS-4.2 Ex (13 sessions) (Hobirk/Challis)  Establish the hybrid scenario with the new wall from the carbon reference (used for the identity with DIII-D & AUG)  Get the largest possible variation in  * and *  Includes in the goals the use of impurity seeding for heat load mitigation (a la AUG) Feb 2012 IOS-4.1 & 3.2 Ex (4 sessions) (Mailloux/Bourdelle)  Establish the largest range of target q profiles accessible on JET with the ILW  Investigate which plasma physics factors are unique to specific operational scenarios ranging from baseline to AT Feb 2012 Link with IOS Joint experiments JET experiments which objectives are in line with IOS Joint experiments But only low shape

ITPA - IOS st Oct Kyoto Some additional/concluding remarks: 1- The JET contact persons for each IOS experiments may not be suitable any more because some people moved to other activities. I propose to review those for the next CC. 2- Note that the AT scenario is not included in the JET Programme in However, experiment Ex has the goal to explore the access to q profiles (from q o ~1 to above 2) IOS-2.1 Ex (9 sessions) (Maddison/Giroud)  Qualify the H-mode performance with impurity seeding and the JET ILW and determine appropriate sensor and actuator  Collisionality (density) scans Ex (6 sessions) (Monier-Garbet/Calabro)  Integrate in scenario with RTC, ELM mitigation, OSP sweeping and detachment Dec 2011 Feb2012 IOS-5.2 Ex (5 sessions) (Van Eester/Jacquet)  Fully characterise H minority in D heating scenario with the new ITER-like wall in particular with regard to heat loads.  Characterisation for each scenario of the effect of plasma-antennae distance. Oct 2011 JET experiments which objectives are in line with IOS Joint experiments