1efda jt-60sa meeting, frascati g. giruzzi4/06/2012 overview of jt-60sa research plan revision in...

4/06/2012 1EFDA JT-60SA Meeting, Frascati G. Giruzzi

Overview of JT-60SA Research Plan revision in 2011

G. Giruzzia), M. Beurskensb), T. Bolzonellac), D. Borbad), C. Daye), E. Joffrina),

P. Lauberf), R. Neuf), F. Orsittog) , M. Romanellib), C. Sozzih)

JT-60SA EU Research Unit

a) CEA/Cadarache, b) CCFE/Culham, c) Consorzio RFX/Padova, d) EFDA/Garching, e) KIT/Karlsruhe, f) IPP/Garching, g) ENEA/Frascati, h) IFP/Milano

https://www2.efda.org/physicswiki/index.php?title=EU_Contribution_to_JT60-SA_Research_Plan


Outline

• JT-60SA: main facts

• The JT-60SA Research Plan

• The JT-60SA Research Unit

• EU activities carried out in 2011

• Conclusions

sources: - Public JT-60SA web site: http://www.jt60sa.org/b/index.htm- S. Ishida, seminar at JET, March 2011- Y. Kamada, seminar at Cadarache, Dec. 2010- S. Ishida et al., Fus. Eng. Des. 85 (2010) 2070 - Y. Kamada et al., IAEA 2010, Nucl. Fus. 51 (2011) 073011 - JT-60SA Research Plan, v3.0 (Dec. 2011) [http://www.jt60sa.org/pdfs/JT-60SA_Res_Plan.pdf]


The satellite tokamak programme

S. Ishida, 2011


The JT-60SA tokamak

S. Ishida, 2011* S = q95Ip/(aBt)

*


The JT-60SA project schedule(2012 revision)

S. Ishida, 2012

TF: Toroidal FieldEF: Equilibrium FieldCS: Central SolenoidVV: Vacuum VesselSNU: Switching Network UnitQPC: Quench Protection CircuitsSCM: Superconducting Magnet PS: Power Supply


The JT-60SA phased operation plan

S. Ishida, 2011


The JT-60SA scientific objectives

• Contribute to early realization of fusion energy by: supporting the exploitation of ITER complementing ITER in resolving key issues for DEMO

• The most important goal of JT-60SA is: to decide the practically acceptable DEMO plasma design including practical and reliable plasma control schemes

• In the original JA view, the DEMO design reference for JT-60SA is an ‘economically attractive (= compact) steady-state’ reactor *

* Slim-CS design (R=5.5 m, N=4.3)K. Tobita et al., Nucl. Fusion 49 (2009) 075029

S. Ishida, 2011


The JT-60SA Research Plan (SARP)

Y. Kamada, 2011


Structure of the JT-60SA Research Plan

Ch.1 IntroductionCh.2 Research Strategy of JT-60SACh.3 Operation Regime DevelopmentCh.4 MHD Stability and ControlCh.5 Transport and ConfinementCh.6 High Energy Particle BehaviourCh.7 Pedestal and Edge CharacteristicsCh.8 Divertor, SOL and PMICh.9 Fusion EngineeringCh.10 Theoretical models and simulation codes

APPENDIXA: Heating and Current Drive Systems B: Divertor Power Handling and Particle Control Systems Ch.8 C: Stability Control Systems Ch.4 D: Plasma Diagnostics Systems E: Magnetic field ripple Ch.6F: Operational scenarios Ch.3G: Design guidelines for additional components Ch.9

SARP v3.0: • ~ 150 pages• 11 main subjects• JA and EU Responsible Officers


The JT-60SA Research Unit (2011)


EU contributors* to JT-60SA Physics activities

Aalto Un. /Helsinki Antti SalmiCCFE /Culham Marc Beurskens, Clive Challis, Ian Chapman, Ian Jenkins, Andrew Kirk, Joëlle Mailloux,

Luca Garzotti, Michele Romanelli, Sergei Sharapov, Irina VoitsekhovitchCEA /Cadarache Jean-François Artaud, Marina Bécoulet, Clarisse Bourdelle, Jérôme Bucalossi, Joan

Decker, David Douai, Gloria Falchetto, Jeronimo Garcia, Eric Gauthier, Gerardo Giruzzi, Marc Goniche, Tuong Hoang, Emmanuel Joffrin, Xavier Litaudon, Philippe Lotte, Didier Mazon, Philippe Moreau, Mireille Schneider, Jean-Marcel Travère, Jean-Claude Vallet

CIEMAT /Madrid Emilia SolanoCNRS /Marseille Sadruddin BenkaddaCREATE /Napoli Alfredo PirontiCRPP /Lausanne Olivier SauterEFDA /Garching Duarte BorbaENEA /Frascati Emilia Barbato, Francesco OrsittoERM /Brussels Jef OngenaFOM /Nieuwegein Marco de Baar, Peter De VriesFZ /Jülich Yunfeng Liang, Sven WiesenF4E /Barcelona Roberta SartoriIFP /Milano Alessandro Bruschi, Daniela Farina, Lorenzo Figini, Paola Mantica, Silvana Nowak,

Carlo Sozzi, Marco TardocchiIPP /Garching Clemente Angioni, Garrard Conway, Philipp Lauber, Karl Lackner, Rudolf Neu, Gabriella

Pautasso, Marco WischmeierJET /Culham Isabel Nunes, George SipsKIT /Karlsruhe Lorenzo Boccaccini, Fabio Cismondi, Christian DayNTUA /Athens Avrilios LazarosRFX /Padova Matteo Baruzzo, Tommaso Bolzonella, Roberto Pasqualotto University of York Howard Wilson

* underlined names:Technical Responsible Officers


EU contributors, list by chapters

Chapter 2 Duarte Borba, Clive Challis, Gerardo Giruzzi, Karl Lackner, Francesco Orsitto

Chapter 3 Jean-François Artaud, Marco de Baar, Clive Challis, Jeronimo Garcia, Gerardo Giruzzi, Emmanuel Joffrin, Xavier Litaudon, Joëlle Mailloux, Isabel Nunes, Roberta Sartori, George Sips, Marco Wischmeier

Chapter 4 Marina Bécoulet, Sadruddin Benkadda, Tommaso Bolzonella, Ian Chapman, Peter De Vries, Emmanuel Joffrin, Avrilios Lazaros, Didier Mazon, Philippe Moreau, Silvana Nowak, Gabriella Pautasso, Alfredo Pironti, Olivier Sauter

Chapter 5 Clemente Angioni, Emilia Barbato, Clarisse Bourdelle, Luca Garzotti, Paola Mantica, Michele Romanelli

Chapter 6 Duarte Borba, Sergei Sharapov, Philipp Lauber, Francesco Orsitto

Chapter 7 Marina Bécoulet, Marc Beurskens, Tommaso Bolzonella, Andrew Kirk, Yunfeng Liang, Emilia Solano, Howard Wilson

Chapter 8 Jérôme Bucalossi, Christian Day, David Douai, Rudolf Neu, Sven Wiesen, Marco Wischmeier

Chapter 9 Lorenzo Boccaccini, Fabio Cismondi, Christian Day

Chapter 10 Emilia Barbato, Matteo Baruzzo, Sadruddin Benkadda, Joan Decker, Gloria Falchetto, Jeronimo Garcia, Gerardo Giruzzi, Emmanuel Joffrin, Xavier Litaudon, Mireille Schneider, Irina Voitsekhovitch, Marco Wischmeier

Appendix A Clive Challis, David Douai, Daniela Farina, Lorenzo Figini, Gerardo Giruzzi, Marc Goniche, Tuong Hoang, Ian Jenkins, Silvana Nowak, Jef Ongena, Antti Salmi, Carlo Sozzi

Appendix D Alessandro Bruschi, Garrard Conway, Peter De Vries, Eric Gauthier, Philippe Lotte, Didier Mazon, Silvana Nowak, Francesco Orsitto, Roberto Pasqualotto, Gabriella Pautasso, Carlo Sozzi, Marco Tardocchi, Jean-Marcel Travère, Jean-Claude Vallet


EFDA activities carried out in 2011

• Involvement of EU physicists in the elaboration of the JT-60SA scientific programme is a precise request of the JA project team

• A EU Physics Unit already exists since 2009,establishing contacts with the JA team, organising presentations in the EU labs, etc.

• JA-EU agreement: the next versions of the Research Plan (starting from v 3.0, by end 2011) should be co-signed by JA and EU Research Units

• Critical analysis of the Research Plan is a very good way to start collaboration in view of a common exploitation of the machine

• In the elaboration of a scientific programme,modelling of

JT-60SA operation scenarios plays a primary role • Activities programmed by EFDA for 2011:

modelling of JT-60SA plasmas (through ISM group) revision of the Research Plan


Modelling of JT-60SA plasmas

• Modelling of JT-60SA plasmas has started in 2011, in the framework

of the ITER Scenario Modelling group (ITM-Task Force)

• This is a multiannual activity, accompanying the preparation, then

the operation phase of the JT-60SA project

• It presently consists of:

0.5-D modelling to check the main scenario parameters

1.5 D modelling using EU integrated tokamak modelling codes

H&CD modelling

MHD modelling


Revision of the Research Plan /1

• An EFDA call for interest has been sent on 20th April 2011

• A coordinator has been appointed

• A team of high-level experts has been assembled for this task: Total: ~70France (25), Italy (11), UK (9), Germany (10), JET+EFDA+F4E (5), Greece (1), Switzerland (3), The Netherlands (2), Belgium (1), Finland (1), Spain (1) 10 countries, 20 Institutes are represented ITPA members: 11JET Task Force leaders or deputies: 4Topical Groups, H&CD CC’s, ITM, ISM (leaders or deputies): 9

• Technical Responsible Officers (TRO) have been appointed for each chapter and relevant Appendix. They were in charge of:

collecting the comments and coordinating discussion with other EU experts discussing with the corresponding JA Responsible Officer and finding an

agreement on extensions and modifications of the Research Plan

• New version of the Research Plan completed and issued (Dec. 2011)


Revision of the Research Plan /2

• Milestones (2011):5 May : first presentation of this activity at the EFDA General Planning Meeting

23-24 May : first meeting in Frascati to organise and start the activity

June: EU TROs nomination and approval by EFDA Steering Committee

27 June : Task Agreement issued by EFDA: 3.7 ppy allocated in 2011

28 June : satellite meeting on JT-60SA organised at EPS (Strasbourg)

7 July : 1st plenary meeting between EU and JA TROs

June-September: remote meeting(s) of the EU groups and with JA TROs

Mid-October: first draft of written comments and modifications (discussed with the corresponding JA TROs) have been produced for most chapters

24-27 October : 1st Research Coordination meeting with JA team in Japan

November-December: writing of v3.0; iterations with the EU experts

End of 2011: public issue of v3.0


Ch. 2: Research strategy of JT-60SAD. Borba, C. Challis, G. Giruzzi, K. Lackner, F. Orsitto

• supporting the exploitation of ITER : demonstrate integrated performance of ITER scenarios, with similar control techniques optimise NTM and RWM control schemes perform burn simulation experiments study pedestal structure and ELM properties in a wide range of collisionality

• resolving key physics issues for DEMO : understand self-regulating plasma systems demonstrate steady-state sustainment of the required integrated plasma performance extend operational boundaries: high N, bootstrap and Greenwald fractions, Ip ramp-up with

minimum use of CS coil, ITBs, divertor radiation, etc. develop plasma control schemes with minimum actuator power and simplified diagnostics

• main EU proposals : integrate JT-60SA research strategy in the worldwide fusion programme in particular, link to the programme of EU machines connect to DEMO strategy in a wider context (e.g.: choice between pulsed and steady-state)


Ch. 3: Operation ScenariosJ.F. Artaud, M. de Baar, C. Challis, J. Garcia, G. Giruzzi, E. Joffrin, X. Litaudon, J. Mailloux, I. Nunes, R. Sartori, G. Sips, M. Wischmeier

#1 #2 #3 #4-1 #4-2 #5-1 #5-2 #6

Full Current

Inductive

DN, 41MW

Full Current

Inductive

SN, 41MW

Full Current

Inductive

SN, 30MW

High dens.

ITER like

Inductive

SN, 34MW

Advanced

Inductive

(hybrid)

SN, 34MW

High N

full-CD

37MW

High fG

full-CD

30MW

High N

300s

13MW

Plasma current, Ip (MA) 5.5 5.5 5.5 4.6 3.5 2.3 2.1 2.0

Toroidal field, Bt (T) 2.25 2.25 2.25 2.28 2.28 1.71 1.62 1.41

q95 ~3 ~3 ~3 ~3 ~4.4 ~5.8 ~6 ~4

R/a (m/m) 2.96 / 1.18 2.96 / 1.18 2.96 / 1.18 2.93 / 1.14 2.93 / 1.14 2.97 / 1.11 2.97 / 1.11 2.97 / 1.11

Aspect ratio A 2.5 2.5 2.5 2.6 2.6 2.7 2.6 2.7

Elongation, x 1.95 1.87 1.86 1.81 1.80 1.90 1.91 1.91

Triangularity, x 0.53 0.50 0.50 0.41 0.41 0.47 0.45 0.51

Normalised beta, N 3.1 3.1 2.6 2.8 3.0 4.3 4.3 3.0

Elec. density (1019m-3) 6.3 6.3 10. 9.1 6.9 5.0 5.3 2.0

Greenwald fract. fG 0.5 0.5 0.8 0.8 0.8 0.85 1.0 0.39

Padd (MW)

PNNB/PPNB/PEC (MW)41

10/24/741

10/24/730

10/20/034

10/24/037

10/20/737

10/20/730

6/17/713.2

3.2/6/4

Thermal conf. time (s) 0.54 0.54 0.68 0.52 0.36 0.23 0.25 0.3

HH98 (v.2) 1.3 1.3 1.1 1.1 1.2 1.3 1.38 1.3

Vloop (V) 0.06 0.06 0.15 0.12 0.07 0 0 0.02

Neutron pr. rate (n/s) 1.3 1017 1.3 1017 7.0 1016 6.7 1016 5.4 1016 4.5 1016 2.9 1016 1.2 1016

en


Ch. 3: Operation regime development. Experimental phases

target values


Ch. 3: Operation regime development. Main EU proposals

• Introduce the scenario details for the H-mode in hydrogen.

• hybrid scenario development with q95~4

• Introduce radiative scenario requirements for each scenario in order to reach ~2 resistive times with the first divertor (i.e. ~30s with10MW/m2 for 10s)

• Introduce a dominated electron heated scenario at maximum field. This may require revisiting the available electron heating power level.

• Introduce 3 research lines on the scenario for DEMO:

High N for the study of MHD limits and control

High P for the study of non-inductive regimes and control

High density above Greenwald with the metallic divertor

• Discuss from the scenario point of view the alternative option to change to the metallic wall at the beginning of the integrated phase.


Ch. 4: MHD stability and controlM. Bécoulet, S. Benkadda, T. Bolzonella, I. Chapman, P. De Vries, E. Joffrin,

A. Lazaros, D. Mazon, P. Moreau, S. Nowak, G. Pautasso, A. Pironti, O. Sauter

• main subjects considered : RWM physics and control NTM physics and control Sawteeth oscillations Disruptions Feedback control hardware

• main EU contributions : Sawteeth control strategy revised NTM control capabilities during

Initial Research Phase investigated ECCD power requirement for NTM

evaluated

S. Nowak


Ch. 5: Transport and confinementC. Angioni, E. Barbato, C. Bourdelle, L. Garzotti, P. Mantica, M. Romanelli

•Main research items: mutual interaction amongst plasma pressure, rotation and current profiles in

highly self-regulating plasmas the intrinsic rotation at high beta, using flexible NBI system + ECRH confinement scaling at high triangularity, shaping, Greenwald fraction confinement time and transport in dominant electron heating plasmas confinement time in the presence of a large population of fast ions transport studies in a wide region of dimensionless parameters


Ch. 6: High energy particle behaviourD. Borba, S. Sharapov, P. Lauber, F. Orsitto

• High-energy ions are produced by 500 keV N-NBI• Main focus of chapter is now :

off-axis NNBI current drive (fast ion transport and instabilities)high-N scenarios and role of energetic particles in it

• Need for measuring high-frequency instabilites (CAEs, GAEs ~1MHz) • Need for runaway diagnostics


Ch. 7: Pedestal and edgeM. Bécoulet, M. Beurskens, T. Bolzonella, A. Kirk, Y. Liang,

E. Solano, H. Wilson

•Small or no ELM regimes: include research on QH mode and type III ELMs

•Active ELM control:Scenario integration with active ELM suppression Active ELM suppression at low plasma rotationPellet ELM pacing studiesSynergy of mitigation techniques

•L-H mode threshold:L-H transition studies at low */high density with NNBIstudy H-mode quality at low input power above the L-H transition and at low

plasma rotationL-H transition studies in current ramps (likely scenario in ITER)

•Edge pedestal characteristics:pedestal scaling with p

test of edge stability models (including High Field Side measurements) recommendations on diagnostics


Ch. 8: Divertor, SOL and PWIJ. Bucalossi, C. Day, D. Douai, R. Neu, S. Wiesen, M. Wischmeier

•Main point revised: strategy and timing for change over from C to W PFCs


Ch. 9: Fusion engineeringL. Boccaccini, F. Cismondi, C. Day

• Use of JT-60SA as test-bed for ITER, DEMO or fusion reactor components• Mockup test of measurement equipments (controlled position,temperature)• Mockup test of blanket structure and neutronic performance, divertor targets• Test of dust monitoring and removal methods• Test of new plasma facing materials (e.g., tungsten alloys)

Global flow chart of the divertor

•Main points revised:Inclusion of a section on peripheral systems

(pumping and fuelling systems)Inclusion of a section on remote handlingInclusion of a programme to check the influence of variable pumping speeds


Ch. 10: Theoretical models and codesE. Barbato, M. Baruzzo, S. Benkadda, J. Decker, G. Falchetto, J. Garcia, G.

Giruzzi, E. Joffrin, X. Litaudon, M. Schneider, I. Voitsekhovitch, M. Wischmeier

• Ch. 10 concerns the use of JT-60SA as a test-bed for theoretical models• Chapter also used as a container for modelling work planned in the next years:

main results and highlights of simulations various Chapters hypotheses, model description / validation, sensitivity studies, ... Chap. 10

• An appendix now contains a list of codes and models, both JA and EU

JT-60SA specificity Model validation

Flexible magnetic configuration, covering ITER shape to strongly shaped plasmas

Models of effect of shaping on plasma confinement and MHD stability

Flexible wall and divertor configuration, planned evolution from C to W

Divertor models. Pedestal models. Migration models for different PFC materials.

Wide range of collisionality Models for collisionality effect on confinement, ELMs, etc.

Extensive set of in-vessel coils for MHD control Models for the impact of magnetic perturbations on plasma confinement, ELMs, MHD instabilities

Powerful and flexible NBI system; MHD mode control by ECCD system

Models connecting safety factor and rotation profiles with plasma transport. Models for NTM stabilisation

Plans for a rather extensive diagnostic system Turbulence, MHD theories, fast particle kinetic models, etc.

High beta, high bootstrap and advanced scenario capability Integrated scenario models. ITB theories. Bootstrap current theories.

Long pulse capability, beyond the global resistive time Integrated scenario models. Real-time control models.


App. A: Heating and CD systemsC. Challis, D. Douai, D. Farina, L. Figini, G. Giruzzi, M. Goniche,

T. Hoang, I. Jenkins, S. Nowak, J. Ongena, A. Salmi, C. Sozzi

•NBI: clarify P/N-NBI CD capabilities, power modulation and active cooling specifications clarify operational boundaries in the various scenarios

•ECRF: Current drive capabilities in the various scenarios documented relevance of the wave frequency in the various scenarios documented Launcher design reviewed

L. Figini


App. D: Plasma Diagnostics systemsA. Bruschi, G. Conway, P. De Vries, E. Gauthier, P. Lotte, D. Mazon, S. Nowak,

F. Orsitto, R. Pasqualotto, G. Pautasso, C. Sozzi, M. Tardocchi, J.M. Travère, J.C. Vallet

Thomson scattering

• comparison with the planned set of ITER diagnostics• assessment of essential diagnostics for scenario development• diagnostics for Real Time Control• DEMO-relevant diagnostics (simple, robust, easy maintenance…)• critical points identified:

fast ion diagnostics ensemble of q-profile diagnostics Thomson scattering optics real time diagnostics


Remote Experimentation Center(IFERC / REC at Rokkasho)

• The REC will be developed as a remote control room for experimental campaigns preparation and data analysis for ITER.

• The REC should be able in the future to monitor the ITER plant status, prepare and transfer pulse parameter files to CODAC, presenting the main machine and plasma parameters in real time, and accessing promptly the experimental data for further analysis at REC.

• The REC will be tested on JT-60SA at the end of its upgrade. • Testing of REC on other machines may also be decided by the Parties. (from the IFERC

Mission Report, March 2006)

A preparatory working group has been set up.

EU members:- S. Clement-Lorenzo- G. Saibene- F. Sartori- G. Giruzzi


Conclusions: a complex but positive experience

• JT-60SA is now under construction. EU should elaborate a strategy for its scientific exploitation (EU contribution to the construction : 160 M€)

• revision of the Research Plan is the first step in this direction

• EU criticisms have been constructive, and well accepted by JA team

• good common work by EU and JA TROs, for quality, quantity, friendly spirit

• open and lively scientific discussion at the final meeting

• output: real improvement of the document

• many ideas for further developments and common work

• now many EU physicist know much more about JT-60SA

• a smaller group has now a good knowledge of the machine and of its scientific programme and is looking forward to the 1st plasma

• we are working to prepare JT-60SA operation and scientific exploitation, with efficient access for EU physicists

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