In May 2014, Brian was granted a DOE Early Career Research Program award for his proposal “Exploration of main-ion properties at the boundary of fusion reactors” to develop a main-ion charge-exchange diagnostic suitable for the H-mode pedestal and study the transport of particles, energy and momentum in the main-ion channel. This early career award (ECA) proposed a research program of diagnostic development, experimental and theoretical plasma physics covering five years and funded at the level of $2.5 M. The funded research program spanned the years 2014 to 2019, achieved eight first author publications, five invited talks and two Department of Energy Fusion Energy Sciences Web Highlights. Two postdocs were brought into the project and both were hired to research staff after their postdoc term ended. For these achievements, Brian was awarded the Kaul Foundation Prize for Excellence in Plasma Physics Research and Technology Development in 2017 by Princeton University “For groundbreaking studies in deuterium charge exchange spectroscopy, leading to the first routine measurement of main ion flow in a fusion plasma.” Results produced by the ECA team have supported, and continue to support multiple other talks, papers, proceedings and research activities at DIII-D.
S.R. Haskey, et. al.
Seminar, Massachusetts Institute of Technology Plasma Science and Fusion Center
Cambridge, MA 13 March 2020
Measuring the Ion Temperature, Rotation and Density: Impurity and Main-ion Charge Exchange Recombination Spectroscopy
S.R. Haskey, et. al.
Seminar, Princeton Plasma Physics Laboratory Graduate Summer School
Princeton, NJ, 14 August 2019
Not All Ions in Tokamaks Go with the Flow
S.R. Haskey, A. Ashourvan and B.A. Grierson
Spectroscopic measurements reveal that main ions flow much faster than impurities at the edge of fusion-relevant plasmas
Office of Science FES Web Highlight 19 Feb 2019
Recent advances in measuring and understanding plasma rotation in the DIII-D tokamak
B.A. Grierson
Seminar, Massachusetts Institute of Technology Plasma Science and Fusion Center
Cambridge, MA, 16 March 2018
Advances in Measuring and Understanding Plasma Rotation in Tokamaks
B.A. Grierson
Seminar, Department of Engineering Physics University of Wisconsin Madison
Madison, WI, 15 February 2018
B.A. Grierson
Kaul Foundation Prize for Excellence in Plasma Physics Research and Technology Development, Princeton University
PPPL Press Release 13 Nov 2017
Computer simulations of DIII-D experiments shed light on mysterious plasma flows
PPPL Press Release 5 Apr 2017
Plasma Turbulence Generates Flow in Fusion Reactors
B.A. Grierson and W.X. Wang
Heating the core of fusion reactors causes them to develop sheared rotation that can improve plasma performance
Office of Science FES Web Highlight 27 Apr 2017
Experimental Study of Transport Driven Intrinsic Rotation and the Pedestal Top in the DIII-D Tokamak
Arash Ashourvan
Seminar, University of California San Diego
San Diego, CA, 27 Feb 2017
Exploration of main-ion properties at the boundary of fusion reactors
B.A. Grierson
DOE Early Career Research Program award
Press Releases from PPPL, General Atomics, ITER Newsline 2014
Ion thermal transport in the H-mode edge transport barrier on DIII-D
Physics of Plasmas 29, 012506 (2022)S. R. Haskey, Arash Ashourvan, S. Banerjee, K. Barada, E. A. Belli, A. Bortolon, J. Candy, J. Chen, C. Chrystal, B. A. Grierson, R. J. Groebner, F. M. Laggner, M. Knolker, G. J. Kramer, M. R. Major, G. Mckee, G. M. Staebler, Z. Yan, and M. A. Van ZeelandPhys. Plasmas 29, 012506 (2022)Published 19 January 2022 doi: https://doi.org/10.1063/5.0072155Main-ion Intrinsic Toroidal Rotation Across the ITG/TEM Boundary in DIII-D Discharges During Ohmic and Electron Cyclotron Heating
B. A. Grierson, C. Chrystal, S.R. Haskey, W.X. Wang, T.L. Rhodes, G. R. McKee, K. Barada, X. Yuan, M.F.F. Nave, A. Ashourvan, and C. HollandPhys. Plasmas 26 042304 (2019), Editor's PickPublished 19 April 2019 https://doi.org/10.1063/1.5090505Relative Intensity Calibration of the DIII-D Charge-Exchange Recombination Spectroscopy System Using Neutral Beam Injection into Gas
B.A. Grierson, K.H. Burrell, C. Chrystal and S.R. Haskey
Rev. Sci. Instrum. 89 10D116
Published 14 September 2018 doi: https://doi.org/10.1063/1.5037333
Active spectroscopy measurements of the deuterium temperature, rotation, and density from the core to scrape off layer on the DIII-D tokamak
S.R. Haskey, B. A. Grierson, L. Stagner, C. Chrystal, A. Ashourvan, A. Bortolon, M. D. Boyer, K. H. Burrell, C. Collins, R. J. Groebner, D. H. Kaplan, and N. A. PablantRev. Sci. Instrum. 89 10D110 (2018)Published 16 August 2018 https://doi.org/10.1063/1.5038349Main ion and impurity edge profile evolution across the L- to H-mode transition on DIII-D
S.R. Haskey, B A Grierson, C Chrystal, A Ashourvan, K H Burrell, R J Groebner, E A Belli, L Stagner, D J Battaglia, T Stoltzfus-DueckPlasma Phys. Control. Fusion 60 105001 (2018)Published 15 August 2018 https://doi.org/10.1088/1361-6587/aad702Validation of the kinetic-turbulent-neoclassical theory for edge intrinsic rotation in DIII-D
Arash Ashourvan, B. A. Grierson, D. J. Battaglia, S. R. Haskey, and T. Stoltzfus-DueckPhys. Plasmas 25 056114 (2018)Published 31 May 2018 https://doi.org/10.1063/1.5018326Deuterium charge exchange recombination spectroscopy from the top of the pedestal to the scrape off layer in H-mode plasmas
S.R. Haskey, B.A. Grierson, L. Stagner, K.H. Burrell, C. Chrystal, R.J. Groebner, A. Ashourvan and N.A. PablantJINST 12 C10013 (2017)Published 25 October 2017 https://doi.org/10.1088/1748-0221/12/10/C10013Measurement of deuterium density profiles in the H-mode steep gradient region using charge exchange recombination spectroscopy on DIII-D
S. R. Haskey, B. A. Grierson, K. H. Burrell, C. Chrystal, R. J. Groebner, D. H. Kaplan, N. A. Pablant, and L. StagnerRev. Sci. Instrum 87 11E553 (2016)Published 26 September 2016High resolution main-ion charge exchange spectroscopy in the DIII-D H-mode pedestal
B. A. Grierson, K. H. Burrell, C. Chrystal, R. J. Groebner, S. R. Haskey and D. H. KaplanRev. Sci. Instrum. 87 11E545 (2016)Published 12 September 2016Publications where ECA team and results play a key role
Creation and sustainment of wide pedestal quiescent H-mode with zero net neutral beam torque
K.H. Burrell, Xi Chen, C. Chrystal, D.R. Ernst, B.A. Grierson, S.R. Haskey, T.H. Osborne, C. Paz-Soldan and T.M. Wilks
Nucl. Fusion 60 086005 (2020)
Published: 3 July 2020 doi: https://doi.org/10.1088/1741-4326/ab940d
Predicting the rotation profile in ITER
By: C. Chrystal, B.A. Grierson, S.R. Haskey, A.C. Sontag, F.M. Poli, M.W. Shafer and J.S. deGrassie
Nucl. Fusion 60 036003 (2020)
Published 21 January 2020 https://doi.org/10.1088/1741-4326/ab6434
DIII-D shaping demonstrates correlation of intrinsic momentum with energy
By: J.S. deGrassie, T.L. Rhodes, T.H. Osborne, L. Zeng, A. Ashourvan, J.A. Boedo, C. Chrystal, B.A. Grierson and S.R. Haskey
Nucl. Fusion 59 096011 (2019)
Published 19 July 2019 https://doi.org/10.1088/1741-4326/ab2bb0
Safety factor and turbulence dynamics dependence of the L-H power threshold on DIII-D
By: Z. Yan, G. R. Mckee, P. Gohil, L. Schmitz, C. Holland, S. R. Haskey, B. A. Grierson, R. Ke, T. Rhodes and C. Petty
Phys. Plasmas 26 062507 (2019)
Published 17 June 2019 https://doi.org/10.1063/1.5091701
Synthetic diagnostic for assessing spatial averaging of charge exchange recombination spectroscopy measurements
C. Chrystal, A. A. Sulyman, S.R. Haskey, K. H. Burrell, and B.A. Grierson
Rev. Sci. Instrum. 89 10D101 (2018)
Published 9 July 2018 https://doi.org/10.1063/1.5036964
OMFIT Tokamak Profile Data Fitting and Physics Analysis
N. C. Logan, B. A. Grierson, S. R. Haskey, S. P. Smith, O. Meneghini and D. Eldon
Fus. Sci. and Technol. 74 125 (2018)
Published 22 January 2018 https://doi.org/10.1080/15361055.2017.1386943
Impact of toroidal and poloidal mode spectra on the control of non-axisymmetric fields in tokamaks
M. J. Lanctot, J.-K. Park, P. Piovesan, Y. Sun, R. J. Buttery, L. Frassinetti, B. A. Grierson, J. M. Hanson, S. R. Haskey, Y. In, Y. M. Jeon, R. J. La Haye, N. C. Logan, L. Marrelli, D. M. Orlov, C. Paz-Soldan, H. H. Wang, E. J. Strait and JET Contributors
Phys. Plasmas 24 056117 (2017)
Published 18 May 2017 https://doi.org/10.1063/1.4982688
Dependence of intrinsic torque and momentum confinement on normalized gyroradius and collisionality in the DIII-D tokamak
C. Chrystal, B. A. Grierson, W. M. Solomon, T. Tala, J. S. deGrassie, C. C. Petty, A. Salmi, and K. H. Burrell
Phys. Plasmas 24 042501 (2017)
Published 29 March 2017 https://doi.org/10.1063/1.4978563
Experimental evidence of edge intrinsic momentum source driven by kinetic ion loss and edge radial electric fields in tokamaks
J. A. Boedo J. S. deGrassie, B. Grierson, T. Stoltzfus-Dueck, D. J. Battaglia, D. L. Rudakov, E. A. Belli, R. J. Groebner, E. Hollmann, C. Lasnier, W. M. Solomon, E. A. Unterberg, J. Watkins, and DIII-D Team
Phys. Plasmas 23 092506 (2016)
Published 21 September 2016 https://doi.org/10.1063/1.4962683
DIII-D research to address key challenges for ITER and fusion energy
R.J. Buttery and the DIII-D Team
Nucl. Fusion 55 104017 (2015)
Published 29 July 2015 https://doi.org/10.1088/0029-5515/55/10/104017
Main-ion Thermal Transport in High Performance DIII-D Edge Transport Barriers
S.R. Haskey
American Physical Society - Division of Plasma Physics (APS-DPP 2020)
Memphis, Tennessee, 9-13 November 2020
Observations of Main-ion Toroidal Rotation and Turbulence Fluctuations Across the ITG/TEM Transition in DIII-D and Comparison to Gyrokinetic Simulations
B.A. Grierson
American Physical Society - Division of Plasma Physics (APS-DPP 2018)
Portland, Oregon, 7 November 2018 NI3.1
Press Releases from PPPL
Main-ion and impurity rotation, temperature, and density evolution across the L-H transition on DIII-D
S. R. Haskey
23rd Join EU-US Transport Task Force Meeting
Seville, Spain 11 - 14 September 2018
Active Spectroscopy Measurements of the Deuterium Temperature, Rotation, and Density from the Core to the Scrape Off Layer on the DIII-D Tokamak
S. R. Haskey
High Temperature Plasma Diagnostics (HTPD 2018)
San Diego, CA, 15-19 April 2018
Validation of Kinetic-Turbulent-Neoclassical Theory for Edge Intrinsic Rotation in DIII-D Plasmas
Arash Ashourvan
American Physical Society - Division of Plasma Physics (APS-DPP 2017)
Milwaukee, Wisconsin, 24 October 2017 JI3.1
Validation of Kinetic-Turbulent-Neoclassical Theory for Edge Intrinsic Rotation in DIII-D Plasmas
Arash Ashourvan
US Transport Task Force Workshop (TTF 2017)
Williamsburg, VA 25 April 2017
Validation of Theoretical Models of Intrinsic Torque in DIII-D and Projection to ITER by Dimensionless Scaling
B.A. Grierson
International Atomic Energy Agency - Fusion Energy Conference (IAEA FEC 2016)
Kyoto, Japan, 22 October 2016 EX-11/1
Contributions delivered by ECA team or where ECA team or results play a key role
Testing the DIII-D Co/Counter Off-axis Neutral Beam Injected Power and Ability to Balance Injected Torque
B.A. Grierson, M.A. Van Zeeland, J. M. Park, I. Bykov, W. W. Heidbrink, J. T. Scoville, B. Crowley, A. Nagy, S.R. Haskey
Proceedings of the 28th IAEA Fusion Energy Conference, P/1-744, Nice, France, 10-15 May 2021 (Originally 12-17 October 2020. Rescheduled due to COVID-19.)
https://conferences.iaea.org/event/214/contributions/17131/contribution.pdf
Turbulence Flow Dynamics and Mode Structure Impacts on the L-H Transition
Z. Yan, G. McKee, D. Kriete, L. Schmitz, P. Gohil, C. Holland, S. Haskey, B.A. Grierson, R. Wilcox, T. Rhodes, C. Craig Petty
Proceedings of the 28th IAEA Fusion Energy Conference, P/1-873, Nice, France, 10-15 May 2021 (Originally 12-17 October 2020. Rescheduled due to COVID-19.)
https://conferences.iaea.org/event/214/contributions/17142/contribution.pdf
Effect of pedestal fluctuations on inter-ELM pedestal recovery and ELM characteristics in ECH dominated discharges in DIII-D
S. Banerjee, S. Mordijck, K. Kumar Barada, L. Zeng, R.J. Groebner, T. Osborne, T. Rhodes, P. B. Snyder, B.A. Grierson, A. Diallo, Z. Yan, J. Chen, F. M. Laggner, S. Haskey
Proceedings of the 28th IAEA Fusion Energy Conference, P/1-939, Nice, France, 10-15 May 2021 (Originally 12-17 October 2020. Rescheduled due to COVID-19.)
https://conferences.iaea.org/event/214/contributions/17153/contribution.pdf
Reducing the L-H Transition Power Threshold via Neoclassical Toroidal Viscosity, Edge Rotation Reversals, and Shape Changes
L. Schmitz, R.S. Wilcox, T.L. Rhodes, Z. Yan, G.R. McKee, T.E. Evans, B.C. Lyons, C. Paz-Soldan, D. Orlov, D.M. Kriete, L. Zeng, T. Osborne, S. Haskey, B.A. Grierson, P. Gohil, C.C. Petty
Proceedings of the 28th IAEA Fusion Energy Conference, P/1-1007, Nice, France, 10-15 May 2021 (Originally 12-17 October 2020. Rescheduled due to COVID-19.)
https://conferences.iaea.org/event/214/contributions/17133/contribution.pdf
Main-ion Thermal Transport in High Performance DIII-D Edge Transport Barriers
S. Haskey, B.A. Grierson, C. Chrystal, G. J. Kramer, Z. Yan, E. A. Belli, Terry Rhodes, Florian M. Laggner, Kshitish Kumar Barada, Jie Chen, Raffi Nazikian, Jeff Candy, Michael Van Zeeland, A. Ashourvan, S. Banerjee
Proceedings of the 28th IAEA Fusion Energy Conference, P/1-750, Nice, France, 10-15 May 2021 (Originally 12-17 October 2020. Rescheduled due to COVID-19.)
https://conferences.iaea.org/event/214/contributions/17145/contribution.pdf
Intrinsic rotation reversals of JET and DIII-D plasmas in Deuterium and Hydrogen
M. F. F. Nave, Ephrem Delabie, M. Barnes, Joao Bernardo, Francis Casson, C. Chrystal, J. Ferreira, Jeronimo Garcia, B.A. Grierson, B. Lomanowski, A. Mauriya, J. deGrassie, F. Parra, M. Romanelli
Proceedings of the 28th IAEA Fusion Energy Conference, P/3-1226, Nice, France, 10-15 May 2021 (Originally 12-17 October 2020. Rescheduled due to COVID-19.)
https://conferences.iaea.org/event/214/contributions/17304/contribution.pdf
Comparison of main-ion thermal transport and poloidal rotation to neoclassical theory in the H-mode pedestal on DIII-D
S.R. Haskey, B.A. Grierson, C. Chrystal C., A. Ashourvan, D.J. Battaglia, T. Stoltzfus-Dueck, E. Belli, L. Schmitz
17th International Workshop on H-mode Physics and Transport Barriers
Shanghai, China, 9-11 October 2019
Advances in Understanding Plasma Rotation and Ion Thermal Transport Using Main-ion Measurements in DIII-D
S.R. Haskey, B.Grierson, C. Chrystal, A. Ashourvan, D. J. Battaglia, T. Stoltzfus-Dueck
Proceedings of the 46th EPS Conference on Plasma Physics, P2.1075, Milan, Italy 12-18 July 2019
Measurements and neoclassical modeling of deuterium and impurity toroidal rotation and temperature profiles in the H-mode pedestal and steep gradient region
S.R. Haskey, D.J. Battaglia , B.A. Grierson , A. Ashourvan , E.A Belli , C. Chrystal
American Physical Society - Division of Plasma Physics (APS-DPP 2018)
Portland, Oregon, 7 November 2018 BO5.11
Viability of Wide Pedestal QH-Mode for Burning Plasma Operation
D. R. Ernst, K. H. Burrell, X. Chen, K. K. Barada, C. C. Petty, T. L. Rhodes, C. Chrystal , C. Paz-Soldan , T. M. Wilks, B. A. Grierson , S.R. Haskey, M. E. Austin , T. Carlstrom, J.Chen, G.R.McKee, T.H.Osborne, C.Sung, D.Truong and L.Zeng
Proceedings of the 27th IAEA Fusion Energy Conference, EX/2-2, Ahmedabad, India, 22-27 October 2018
Predicting the Toroidal Rotation Profile for ITER
C. Chrystal, B. A. Grierson, S. R. Haskey, J. S. deGrassie, G. M. Staebler, T. Tala, and A. Salmi
Proceedings of the 27th IAEA Fusion Energy Conference, EX/5-2, Ahmedabad, India, 22-27 October 2018
DIII-D Shaping Demonstrates Correlation of Intrinsic Momentum with Energy
J. S. deGrassie, T. L. Rhodes, J. A. Boedo, B. A. Grierson, C. Chrystal, T. H. Osborne, S.R. Haskey and A. Ashourvan
Proceedings of the 27th IAEA Fusion Energy Conference, EX/P6-1, Ahmedabad, India, 22-27 October 2018
Wide Pedestal Quiescent H-mode Plasmas in DIII-D Tokamak
Xi Chen, K.H. Burrell, T.H. Osborne, K. Barada, D. R. Ernst, C. Chrystal, B.A. Grierson, G.R. McKee, T. Odstrcil, C.P. Paz-Soldan, C.C. Petty, T.L. Rhodes, J.C. Rost, W.M. Solomon, T.M. Wilks, Z. Yan and L. Zeng
European Physical Society 45th Conference on Plasma Physics
Prague, Czech Republic, 2-6 July 2018 O2.112
Optimizing 3D spectra for rotation control
N.C. Logan, S.R. Haskey, B.A. Grierson, R. Nazikian, C. Chrystal, C. Paz-Soldan
European Physical Society 45th Conference on Plasma Physics
Prague, Czech Republic, 2-6 July 2018 P4.1037
Using rotating current ribbons to model MHD: the EHO
Emilia R. Solano, K. Burrell, T. Strait, T. Evans, S. Haskey, T. Osborne, X. Chen, B. S. Victor, C. P. von Thun, DIII-D team and JET Contributors
European Physical Society 45th Conference on Plasma Physics
Prague, Czech Republic, 2-6 July 2018 P4.1044
Advances in Understanding and Control of Plasma Rotation on DIII-D
B A Grierson , N Logan , S Haskey , A Ashourvan , D Ernst , C Chrystal , J deGrassie, J Boedo , T Tala , A Salmi
American Physical Society - Division of Plasma Physics (APS-DPP 2017)
Milwaukee, Wisconsin, 24 October 2017 BO4.7