Isotope identity experiments in JET-ILW with H and D L-mode plasmas

Maggi, C. F.; Weisen, H.; Casson, F. J.; Auriemma, F.; Lorenzini, R.; Nordman, H.; Delabie, E.; Eriksson, F.; Flanagan, J.; Keeling, D.; King, D.; Horvath, L.; Menmuir, S.; Salmi, A.; Sips, G.; Tala, T.; Voitsekhovich, I.

doi:10.1088/1741-4326/ab1ccd

Title: Isotope identity experiments in JET-ILW with H and D L-mode plasmas

Abstract

NBI-heated L-mode plasmas have been obtained in JET with the Be/W ITER-like wall (JET-ILW) in H and D, with matched profiles of the dimensionless plasma parameters, ρ*, ν*, β and q in the plasma core confinement region and same T_i/T_e and Z_eff. The achieved isotope identity indicates that the confinement scale invariance principle is satisfied in the core confinement region of these plasmas, where the dominant instabilities are Ion Temperature Gradient (ITG) modes. The dimensionless thermal energy confinement time, Ω_i τ_E,t_h, and the scaled core plasma heat diffusivity, A χ_eff/B_T, are identical in H and D within error bars, indicating lack of isotope mass dependence of the dimensionless L-mode thermal energy confinement time in JET-ILW. Predictive flux driven simulations with JETTO-TGLF of the H and D identity pair is in very good agreement with experiment for both isotopes: the stiff core heat transport, typical of JET-ILW NBI heated L-modes, overcomes the local gyro-Bohm scaling of gradient-driven TGLF, explaining the lack of isotope mass dependence in the confinement region of these plasmas. The effect of E × B shearing on the predicted heat and particle transport channels is found to be negligible for these low beta and low momentum input plasmas.

Authors:

^[1]; Weisen, H. ^[2]; Casson, F. J. ^[1];

^[3]; Lorenzini, R. ^[3]; Nordman, H. ^[4];

^[5];

^[4]; Flanagan, J. ^[1]; Keeling, D. ^[1]; King, D. ^[1];

^[6]; Menmuir, S. ^[1]; Salmi, A. ^[7]; Sips, G. ^[8]; Tala, T. ^[7]; Voitsekhovich, I. ^[1]

Culham Science Centre, Abingdon (United Kingdom). Culham Centre for Fusion Energy (CCFE)
Ecole Polytechnique Federale Lausanne (Switzerland)
Consorzio RFX, Padova (Italy)
Chalmers University of Technology, Göteborg (Sweden)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of York (United Kingdom)
VTT Technical Research Centre of Finland (Finland)
European Commission, Brussels (Belgium)

Publication Date:: Fri Jun 07 00:00:00 EDT 2019

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1811413

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Nuclear Fusion

Additional Journal Information:: Journal Volume: 59; Journal Issue: 7; Journal ID: ISSN 0029-5515

Publisher:: IOP Science

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats


                    Maggi, C. F., Weisen, H., Casson, F. J., Auriemma, F., Lorenzini, R., Nordman, H., Delabie, E., Eriksson, F., Flanagan, J., Keeling, D., King, D., Horvath, L., Menmuir, S., Salmi, A., Sips, G., Tala, T., and Voitsekhovich, I. Isotope identity experiments in JET-ILW with H and D L-mode plasmas.  United States: N. p., 2019. 
Web.  doi:10.1088/1741-4326/ab1ccd.

Copy to clipboard


                    Maggi, C. F., Weisen, H., Casson, F. J., Auriemma, F., Lorenzini, R., Nordman, H., Delabie, E., Eriksson, F., Flanagan, J., Keeling, D., King, D., Horvath, L., Menmuir, S., Salmi, A., Sips, G., Tala, T., & Voitsekhovich, I. Isotope identity experiments in JET-ILW with H and D L-mode plasmas.  United States.  https://doi.org/10.1088/1741-4326/ab1ccd

Copy to clipboard


                    Maggi, C. F., Weisen, H., Casson, F. J., Auriemma, F., Lorenzini, R., Nordman, H., Delabie, E., Eriksson, F., Flanagan, J., Keeling, D., King, D., Horvath, L., Menmuir, S., Salmi, A., Sips, G., Tala, T., and Voitsekhovich, I. Fri .  
"Isotope identity experiments in JET-ILW with H and D L-mode plasmas".  United States.  https://doi.org/10.1088/1741-4326/ab1ccd.  https://www.osti.gov/servlets/purl/1811413.

Copy to clipboard


                    
@article{osti_1811413,

  title        = {Isotope identity experiments in JET-ILW with H and D L-mode plasmas},

  author       = {Maggi, C. F. and Weisen, H. and Casson, F. J. and Auriemma, F. and Lorenzini, R. and Nordman, H. and Delabie, E. and Eriksson, F. and Flanagan, J. and Keeling, D. and King, D. and Horvath, L. and Menmuir, S. and Salmi, A. and Sips, G. and Tala, T. and Voitsekhovich, I.},

  abstractNote = {NBI-heated L-mode plasmas have been obtained in JET with the Be/W ITER-like wall (JET-ILW) in H and D, with matched profiles of the dimensionless plasma parameters, ρ*, ν*, β and q in the plasma core confinement region and same Ti/Te and Zeff. The achieved isotope identity indicates that the confinement scale invariance principle is satisfied in the core confinement region of these plasmas, where the dominant instabilities are Ion Temperature Gradient (ITG) modes. The dimensionless thermal energy confinement time, Ωi τE,th, and the scaled core plasma heat diffusivity, A χeff/BT, are identical in H and D within error bars, indicating lack of isotope mass dependence of the dimensionless L-mode thermal energy confinement time in JET-ILW. Predictive flux driven simulations with JETTO-TGLF of the H and D identity pair is in very good agreement with experiment for both isotopes: the stiff core heat transport, typical of JET-ILW NBI heated L-modes, overcomes the local gyro-Bohm scaling of gradient-driven TGLF, explaining the lack of isotope mass dependence in the confinement region of these plasmas. The effect of E × B shearing on the predicted heat and particle transport channels is found to be negligible for these low beta and low momentum input plasmas.},

  doi          = {10.1088/1741-4326/ab1ccd},

  journal      = {Nuclear Fusion},

  number       = 7,

  volume       = 59,

  place        = {United States},

  year         = {Fri Jun 07 00:00:00 EDT 2019},

  month        = {Fri Jun 07 00:00:00 EDT 2019}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1088/1741-4326/ab1ccd

Other availability

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Dependence of L mode confinement on plasma ion species in JET
journal, September 1993

Tibone, F.; Balet, B.; Bures, M.
Nuclear Fusion, Vol. 33, Issue 9
DOI: 10.1088/0029-5515/33/9/I07

Isotope effects on L-H threshold and confinement in tokamak plasmas
journal, November 2017

Maggi, C. F.; Weisen, H.; Hillesheim, J. C.
Plasma Physics and Controlled Fusion, Vol. 60, Issue 1
DOI: 10.1088/1361-6587/aa9901

Non-inductively driven currents in JET
journal, April 1989

Challis, C. D.; Cordey, J. G.; Hamnén, H.
Nuclear Fusion, Vol. 29, Issue 4
DOI: 10.1088/0029-5515/29/4/002

Status of the JET LIDAR Thomson Scattering diagnostic
text, January 2013

Maslov, M.; Beurskens, M. N. A.; Kempenaars, M.
arXiv
DOI: 10.48550/arxiv.1312.3109

New techniques for calculating heat and particle source rates due to neutral beam injection in axisymmetric tokamaks
journal, September 1981

Goldston, R. J.; McCune, D. C.; Towner, H. H.
Journal of Computational Physics, Vol. 43, Issue 1
DOI: 10.1016/0021-9991(81)90111-X

Fuel retention studies with the ITER-Like Wall in JET
journal, July 2013

Brezinsek, S.; Loarer, T.; Philipps, V.
Nuclear Fusion, Vol. 53, Issue 8
DOI: 10.1088/0029-5515/53/8/083023

JINTRAC: A System of Codes for Integrated Simulation of Tokamak Scenarios
journal, January 2014

Romanelli, Michele; Corrigan, Gerard; Parail, Vassili
Plasma and Fusion Research, Vol. 9, Issue 0
DOI: 10.1585/pfr.9.3403023

A model of the saturation of coupled electron and ion scale gyrokinetic turbulence
journal, May 2017

Staebler, G. M.; Howard, N. T.; Candy, J.
Nuclear Fusion, Vol. 57, Issue 6
DOI: 10.1088/1741-4326/aa6bee

Effect of isotope mass on transport simulations of Joint European Torus high-mode plasmas with Edge Localized Modes
journal, December 1999

Bateman, Glenn; Kritz, Arnold H.; Parail, Vassili V.
Physics of Plasmas, Vol. 6, Issue 12
DOI: 10.1063/1.873724

Overview of the JET results in support to ITER
journal, June 2017

Litaudon, X.; Abduallev, S.; Abhangi, M.
Nuclear Fusion, Vol. 57, Issue 10
DOI: 10.1088/1741-4326/aa5e28

High resolution Thomson scattering for Joint European Torus (JET)
journal, October 2004

Pasqualotto, R.; Nielsen, P.; Gowers, C.
Review of Scientific Instruments, Vol. 75, Issue 10
DOI: 10.1063/1.1787922

Carbon charge exchange analysis in the ITER-like wall environment
journal, November 2014

Menmuir, S.; Giroud, C.; Biewer, T. M.
Review of Scientific Instruments, Vol. 85, Issue 11
DOI: 10.1063/1.4890118

Dependence of the turbulent particle flux on hydrogen isotopes induced by collisionality
journal, August 2018

Angioni, C.; Fable, E.; Manas, P.
Physics of Plasmas, Vol. 25, Issue 8
DOI: 10.1063/1.5045545

Scaling laws for plasma confinement
journal, October 1977

Connor, J. W.; Taylor, J. B.
Nuclear Fusion, Vol. 17, Issue 5
DOI: 10.1088/0029-5515/17/5/015

Isotope identity experiments in JET
journal, May 2000

Cordey, J. G.; Alper, B.; Budny, R.
Plasma Physics and Controlled Fusion, Vol. 42, Issue 5A
DOI: 10.1088/0741-3335/42/5A/312

A theory-based transport model with comprehensive physics
journal, May 2007

Staebler, G. M.; Kinsey, J. E.; Waltz, R. E.
Physics of Plasmas, Vol. 14, Issue 5
DOI: 10.1063/1.2436852

Plasma confinement in JET H mode plasmas with H, D, DT and T isotopes
journal, March 1999

Cordey, J. G.; Balet, B.; Bartlett, D. V.
Nuclear Fusion, Vol. 39, Issue 3
DOI: 10.1088/0029-5515/39/3/301

Electron cyclotron emission radiometer upgrade on the Joint European Torus (JET) tokamak
journal, October 2004

Luna, E. de la; Sánchez, J.; Tribaldos, V.
Review of Scientific Instruments, Vol. 75, Issue 10
DOI: 10.1063/1.1781376

Works referencing / citing this record:

Density peaking in JET—determined by fuelling or transport?
journal, October 2019

Tala, T.; Nordman, H.; Salmi, A.
Nuclear Fusion, Vol. 59, Issue 12
DOI: 10.1088/1741-4326/ab4248

Overview of the JET preparation for deuterium–tritium operation with the ITER like-wall
text, January 2019

Joffrin, E.; Abduallev, S.; Abhangi, M.
Karlsruhe
DOI: 10.5445/ir/1000098397

Extended investigations of isotope effects on ECRH plasma in LHD
journal, December 2019

Tanaka, K.; Nakata, M.; Ohtani, Y.
Plasma Physics and Controlled Fusion, Vol. 62, Issue 2
DOI: 10.1088/1361-6587/ab5bae

Isotope Effect on Energy Confinement Time and Thermal Transport in Neutral-Beam-Heated Stellarator-Heliotron Plasmas
journal, October 2019

Yamada, H.; Tanaka, K.; Seki, R.
Physical Review Letters, Vol. 123, Issue 18
DOI: 10.1103/PhysRevLett.123.185001

Role of fast ion pressure in the isotope effect in JET L-mode plasmas
journal, July 2019

Bonanomi, N.; Casiraghi, I.; Mantica, P.
Nuclear Fusion, Vol. 59, Issue 9
DOI: 10.1088/1741-4326/ab2d4f

Overview of the JET preparation for deuterium–tritium operation with the ITER like-wall
journal, August 2019

Joffrin, E.; Abduallev, S.; Abhangi, M.
Nuclear Fusion, Vol. 59, Issue 11
DOI: 10.1088/1741-4326/ab2276

Similar Records in DOE PAGES and OSTI.GOV collections:

Isotope physics of heat and particle transport with tritium in JET-ILW type-I ELMy H-mode plasmas

Journal Article Schneider, Philip A. ; Angioni, C. ; Auriemma, F. ; ... - Nuclear Fusion

As part the DTE2 campaign in the JET tokamak, we conducted a parameter scan in T and D-T complementing existing pulses in H and D. For the different main ion masses, type-I ELMy H-modes at fixed plasma current and magnetic field can have the pedestal pressure varying by a factor of 4 and the total pressure changing from β N = 1.0 to 3.0. We investigated the pedestal and core isotope mass dependencies using this extensive data set. The pedestal shows a strongmore »« less
https://doi.org/10.1088/1741-4326/acf560

Full Text Available
The dependence of confinement on the isotope mass in the core and the edge of AUG and JET-ILW H-mode plasmas

Journal Article Schneider, Philip A. ; Angioni, C. ; Frassinetti, L. ; ... - Nuclear Fusion

Experiments in ASDEX Upgrade (AUG) and JET with the ITER-like wall (JET-ILW) are performed to separate the pedestal and core contributions to confinement in H-modes with different main ion masses. A strong isotope mass dependence in the pedestal is found which is enhanced at high gas puffing. This is because the ELM type changes when going from D to H for matched engineering parameters, which is likely due to differences in the inter ELM transport with isotope mass. The pedestal can be matched in H and D plasmas by varying only the triangularity and keeping the engineering parameters relevant formore »« less
https://doi.org/10.1088/1741-4326/ac3e82

Full Text Available
The role of edge plasma parameters in H-mode density limit on the JET-ILW

Journal Article Sun, H. J. ; Goldston, R. J. ; Huber, A. ; ... - Nuclear Fusion

A study of a dataset of JET H-mode plasma with the Be/W ITER-like wall (JET-ILW) shows that reaching the edge MHD ballooning limit leads to confinement degradation. However, unlike JET plasmas with a carbon wall (JET-C), the JET-ILW plasmas stay in a marginal dithering phase for a relatively long period, associated with a higher (≈20%) H-mode density limit (HDL) than JET-C equivalents. This suggests that ITER could be operated in H-mode with higher density than the scaling based on carbon wall devices, but likely with a dithering phase plasma with lower confinement. A new, reliable estimator for JET E_{r, min}more »« less
https://doi.org/10.1088/1741-4326/abf056

Full Text Available
High fusion performance at high T_i/T_e in JET-ILW baseline plasmas with high NBI heating power and low gas puffing

Journal Article Kim, Hyun-Tae ; Sips, A. C. C. ; Romanelli, M. ; ... - Nuclear Fusion

This article presents the transport analysis of high density baseline discharges in the 2016 experimental campaign of the Joint European Torus with the ITER-Like Wall (JET-ILW), where a significant increase in the deuterium–deuterium (D–D) fusion neutron rate (~2.8 × 10¹⁶ s^-1) was achieved with stable high neutral beam injection (NBI) powers of up to 28 MW and low gas puffing. Increase in T_i exceeding T_e were produced for the first time in baseline discharges despite the high electron density; this enabled a significant increase in the thermal fusion reaction rate. As a result, the new achieved record in fusion performancemore »« less
Cited by 25
https://doi.org/10.1088/1741-4326/aaa582

Full Text Available
The role of electron-scale turbulence in the JET tokamak: experiments and modelling

Journal Article Mantica, P. ; Bonanomi, N. ; Mariani, A. ; ... - Nuclear Fusion

Dedicated electron heat transport experiments have been carried out in L- and H-mode Deuterium plasmas of the JET-ILW tokamak to identify the amount of electron heat carried by electron-scale electron temperature gradient (ETG) modes. Ion cyclotron resonance heating at different positions has been used to probe the response of the electron temperature inverse gradient length R/L_Te to changes in electron heat flux qe, while different amounts of neutral beam heating allowed to scan the ratio of ion to electron temperature T_e/T_i, which is a key parameter for the onset of ETGs. Results indicate a steepening of the normalized qe vsmore »« less
https://doi.org/10.1088/1741-4326/ac146e

Full Text Available

Similar Records

Title: Isotope identity experiments in JET-ILW with H and D L-mode plasmas

Abstract

Citation Formats

Dependence of L mode confinement on plasma ion species in JET journal, September 1993

Isotope effects on L-H threshold and confinement in tokamak plasmas journal, November 2017

Non-inductively driven currents in JET journal, April 1989

Status of the JET LIDAR Thomson Scattering diagnostic text, January 2013

New techniques for calculating heat and particle source rates due to neutral beam injection in axisymmetric tokamaks journal, September 1981

Fuel retention studies with the ITER-Like Wall in JET journal, July 2013

JINTRAC: A System of Codes for Integrated Simulation of Tokamak Scenarios journal, January 2014

A model of the saturation of coupled electron and ion scale gyrokinetic turbulence journal, May 2017

Effect of isotope mass on transport simulations of Joint European Torus high-mode plasmas with Edge Localized Modes journal, December 1999

Overview of the JET results in support to ITER journal, June 2017

High resolution Thomson scattering for Joint European Torus (JET) journal, October 2004

Carbon charge exchange analysis in the ITER-like wall environment journal, November 2014

Dependence of the turbulent particle flux on hydrogen isotopes induced by collisionality journal, August 2018

Scaling laws for plasma confinement journal, October 1977

Isotope identity experiments in JET journal, May 2000

A theory-based transport model with comprehensive physics journal, May 2007

Plasma confinement in JET H mode plasmas with H, D, DT and T isotopes journal, March 1999

Electron cyclotron emission radiometer upgrade on the Joint European Torus (JET) tokamak journal, October 2004

Density peaking in JET—determined by fuelling or transport? journal, October 2019

Overview of the JET preparation for deuterium–tritium operation with the ITER like-wall text, January 2019

Extended investigations of isotope effects on ECRH plasma in LHD journal, December 2019

Isotope Effect on Energy Confinement Time and Thermal Transport in Neutral-Beam-Heated Stellarator-Heliotron Plasmas journal, October 2019

Role of fast ion pressure in the isotope effect in JET L-mode plasmas journal, July 2019

Overview of the JET preparation for deuterium–tritium operation with the ITER like-wall journal, August 2019

Dependence of L mode confinement on plasma ion species in JET
journal, September 1993

Isotope effects on L-H threshold and confinement in tokamak plasmas
journal, November 2017

Non-inductively driven currents in JET
journal, April 1989

Status of the JET LIDAR Thomson Scattering diagnostic
text, January 2013

New techniques for calculating heat and particle source rates due to neutral beam injection in axisymmetric tokamaks
journal, September 1981

Fuel retention studies with the ITER-Like Wall in JET
journal, July 2013

JINTRAC: A System of Codes for Integrated Simulation of Tokamak Scenarios
journal, January 2014

A model of the saturation of coupled electron and ion scale gyrokinetic turbulence
journal, May 2017

Effect of isotope mass on transport simulations of Joint European Torus high-mode plasmas with Edge Localized Modes
journal, December 1999

Overview of the JET results in support to ITER
journal, June 2017

High resolution Thomson scattering for Joint European Torus (JET)
journal, October 2004

Carbon charge exchange analysis in the ITER-like wall environment
journal, November 2014

Dependence of the turbulent particle flux on hydrogen isotopes induced by collisionality
journal, August 2018

Scaling laws for plasma confinement
journal, October 1977

Isotope identity experiments in JET
journal, May 2000

A theory-based transport model with comprehensive physics
journal, May 2007

Plasma confinement in JET H mode plasmas with H, D, DT and T isotopes
journal, March 1999

Electron cyclotron emission radiometer upgrade on the Joint European Torus (JET) tokamak
journal, October 2004

Density peaking in JET—determined by fuelling or transport?
journal, October 2019

Overview of the JET preparation for deuterium–tritium operation with the ITER like-wall
text, January 2019

Extended investigations of isotope effects on ECRH plasma in LHD
journal, December 2019

Isotope Effect on Energy Confinement Time and Thermal Transport in Neutral-Beam-Heated Stellarator-Heliotron Plasmas
journal, October 2019

Role of fast ion pressure in the isotope effect in JET L-mode plasmas
journal, July 2019

Overview of the JET preparation for deuterium–tritium operation with the ITER like-wall
journal, August 2019