Universality of Poisson-driven plasma fluctuations in the Alcator C-Mod scrape-off layer

Theodorsen, A.; Garcia, O. E.; Kube, R.; LaBombard, B.; Terry, J. L.

doi:10.1063/1.5064744

Title: Universality of Poisson-driven plasma fluctuations in the Alcator C-Mod scrape-off layer

Journal Article · Tue Dec 18 00:00:00 EST 2018 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5064744· OSTI ID:1609300

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UiT The Arctic Univ. of Norway, Tromsø (Norway)
MIT Plasma Science and Fusion Center, Cambridge, MA (United States)

Large-amplitude, intermittent fluctuations are ubiquitous in the boundary region of magnetically confined plasmas and lead to detrimental plasma-wall interactions in next-generation, high duty cycle fusion power experiments. Using gas puff imaging data time series from the scrape-off layer in the Alcator C-Mod device, it is demonstrated in this work that the large-amplitude fluctuations can be described as a super-position of pulses with a fixed shape and a constant duration. By applying a new deconvolution algorithm on the data time series with a two-sided exponential pulse function, the arrival times and amplitudes of the pulses can be estimated, and the measurement time series can be reconstructed with high accuracy. The pulse amplitudes are shown to follow an exponential distribution. The waiting times between pulses are uncorrelated, their distribution has an exponential tail, and the number of arrivals is a linear function of time. This demonstrates that pulse arrivals follow a homogeneous Poisson process. Identical statistical properties apply to both ohmic and high confinement mode plasmas, clearly demonstrating the universality of the fluctuation statistics in the boundary region of Alcator C-Mod.

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Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Organization:: Research Council of Norway; USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FC02-99ER54512; 240510/ F20

OSTI ID:: 1609300

Journal Information:: Physics of Plasmas, Vol. 25, Issue 12; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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References (62)

On the scaling of avaloids and turbulence with the average density approaching the density limit Antar, G. Y.; Counsell, G.; Ahn, J. -W. Physics of Plasmas, Vol. 12, Issue 8 https://doi.org/10.1063/1.1953592	journal	August 2005
Radial transport in the far scrape-off layer of ASDEX Upgrade during L-mode and ELMy H-mode Ionita, C.; Naulin, V.; Mehlmann, F. Nuclear Fusion, Vol. 53, Issue 4 https://doi.org/10.1088/0029-5515/53/4/043021	journal	April 2013
Burst statistics in Alcator C-Mod SOL turbulence Garcia, O. E.; Cziegler, I.; Kube, R. Journal of Nuclear Materials, Vol. 438 https://doi.org/10.1016/j.jnucmat.2013.01.054	journal	July 2013
Blob Transport in the Plasma Edge: a Review Garcia, O. E. Plasma and Fusion Research, Vol. 4 https://doi.org/10.1585/pfr.4.019	journal	January 2009
Intermittent fluctuations in the Alcator C-Mod scrape-off layer Garcia, O. E.; Fritzner, S. M.; Kube, R. Physics of Plasmas, Vol. 20, Issue 5 https://doi.org/10.1063/1.4802942	journal	May 2013
Richardson-Lucy Deblurring for Scenes under a Projective Motion Path IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol. 33, Issue 8 https://doi.org/10.1109/TPAMI.2010.222	journal	August 2011
Probability distribution functions for intermittent scrape-off layer plasma fluctuations Theodorsen, A.; Garcia, O. E. Plasma Physics and Controlled Fusion, Vol. 60, Issue 3 https://doi.org/10.1088/1361-6587/aa9f9c	journal	January 2018
Plasma–surface interaction, scrape-off layer and divertor physics: implications for ITER Lipschultz, B.; Bonnin, X.; Counsell, G. Nuclear Fusion, Vol. 47, Issue 9 https://doi.org/10.1088/0029-5515/47/9/016	journal	August 2007
Level crossings and excess times due to a superposition of uncorrelated exponential pulses Theodorsen, A.; Garcia, O. E. Physical Review E, Vol. 97, Issue 1 https://doi.org/10.1103/PhysRevE.97.012110	journal	January 2018
Assessment of the effects of scrape-off layer fluctuations on first wall sputtering with the TOKAM-2D turbulence code Marandet, Y.; Nace, N.; Valentinuzzi, M. Plasma Physics and Controlled Fusion, Vol. 58, Issue 11 https://doi.org/10.1088/0741-3335/58/11/114001	journal	September 2016
Edge and SOL turbulence and blob variations over a large database in NSTX Zweben, S. J.; Davis, W. M.; Kaye, S. M. Nuclear Fusion, Vol. 55, Issue 9 https://doi.org/10.1088/0029-5515/55/9/093035	journal	September 2015
A new look at density limits in tokamaks Greenwald, M.; Terry, J. L.; Wolfe, S. M. Nuclear Fusion, Vol. 28, Issue 12 https://doi.org/10.1088/0029-5515/28/12/009	journal	December 1988
Convergence of statistical moments of particle density time series in scrape-off layer plasmas Kube, R.; Garcia, O. E. Physics of Plasmas, Vol. 22, Issue 1 https://doi.org/10.1063/1.4905513	journal	January 2015
Recent theoretical progress in understanding coherent structures in edge and SOL turbulence Krasheninnikov, S. I.; D'Ippolito, D. A.; Myra, J. R. Journal of Plasma Physics, Vol. 74, Issue 5 https://doi.org/10.1017/S0022377807006940	journal	October 2008
Intermittent electron density and temperature fluctuations and associated fluxes in the Alcator C-Mod scrape-off layer Kube, R.; Garcia, O. E.; Theodorsen, A. Plasma Physics and Controlled Fusion, Vol. 60, Issue 6 https://doi.org/10.1088/1361-6587/aab726	journal	April 2018
On the relation between non-exponential scrape off layer profiles and the dynamics of filaments Militello, F.; Omotani, J. T. Plasma Physics and Controlled Fusion, Vol. 58, Issue 12 https://doi.org/10.1088/0741-3335/58/12/125004	journal	October 2016
Relationship between frequency power spectra and intermittent, large-amplitude bursts in the Alcator C-Mod scrape-off layer Theodorsen, A.; Garcia, O. E.; Kube, R. Nuclear Fusion, Vol. 57, Issue 11 https://doi.org/10.1088/1741-4326/aa7e4c	journal	August 2017
Quiescent H-Mode Plasmas with Strong Edge Rotation in the Cocurrent Direction Burrell, K. H.; Osborne, T. H.; Snyder, P. B. Physical Review Letters, Vol. 102, Issue 15 https://doi.org/10.1103/PhysRevLett.102.155003	journal	April 2009
Scrape-off layer turbulence in TCV: evidence in support of stochastic modelling Theodorsen, A.; Garcia, O. E.; Horacek, J. Plasma Physics and Controlled Fusion, Vol. 58, Issue 4 https://doi.org/10.1088/0741-3335/58/4/044006	journal	January 2016
Stochastic modelling of intermittent fluctuations in the scrape-off layer: Correlations, distributions, level crossings, and moment estimation Garcia, O. E.; Kube, R.; Theodorsen, A. Physics of Plasmas, Vol. 23, Issue 5 https://doi.org/10.1063/1.4951016	journal	May 2016
Auto-correlation function and frequency spectrum due to a super-position of uncorrelated exponential pulses Garcia, O. E.; Theodorsen, A. Physics of Plasmas, Vol. 24, Issue 3 https://doi.org/10.1063/1.4978955	journal	March 2017
Blob structure and motion in the edge and SOL of NSTX Zweben, S. J.; Myra, J. R.; Davis, W. M. Plasma Physics and Controlled Fusion, Vol. 58, Issue 4, Article No. 044007 https://doi.org/10.1088/0741-3335/58/4/044007	journal	January 2016
Blob Transport in the Tokamak Scrape-off-Layer D'Ippolito, D. A.; Myra, J. R.; Krasheninnikov, S. I. Contributions to Plasma Physics, Vol. 44, Issue 13 https://doi.org/10.1002/ctpp.200410030	journal	April 2004
Experimental studies of edge turbulence and confinement in Alcator C-Mod Cziegler, I.; Terry, J. L.; Hughes, J. W. Physics of Plasmas, Vol. 17, Issue 5 https://doi.org/10.1063/1.3421577	journal	May 2010
Material erosion and migration in tokamaks Pitts, R. A.; Coad, J. P.; Coster, D. P. Plasma Physics and Controlled Fusion, Vol. 47, Issue 12B https://doi.org/10.1088/0741-3335/47/12B/S22	journal	November 2005
Intermittent fluctuations in the TCV scrape-off layer Garcia, O. E.; Horacek, J.; Pitts, R. A. Nuclear Fusion, Vol. 55, Issue 6 https://doi.org/10.1088/0029-5515/55/6/062002	journal	May 2015
An Iterative Image Space Reconstruction Algorthm Suitable for Volume ECT Daube-Witherspoon, Margaret E.; Muehllehner, Gerd IEEE Transactions on Medical Imaging, Vol. 5, Issue 2 https://doi.org/10.1109/TMI.1986.4307748	journal	June 1986
20 years of research on the Alcator C-Mod tokamaka) Greenwald, M.; Bader, A.; Baek, S. Physics of Plasmas, Vol. 21, Issue 11 https://doi.org/10.1063/1.4901920	journal	November 2014
Interpretation of scrape-off layer profile evolution and first-wall ion flux statistics on JET using a stochastic framework based on fillamentary motion Walkden, N. R.; Wynn, A.; Militello, F. Plasma Physics and Controlled Fusion, Vol. 59, Issue 8 https://doi.org/10.1088/1361-6587/aa7365	journal	June 2017
Scrape off layer profiles interpreted with filament dynamics Militello, F.; Omotani, J. T. Nuclear Fusion, Vol. 56, Issue 10 https://doi.org/10.1088/0029-5515/56/10/104004	journal	August 2016
Intermittent fluctuations in the Alcator C-Mod scrape-off layer for ohmic and high confinement mode plasmas Garcia, O. E.; Kube, R.; Theodorsen, A. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5018709	journal	May 2018
Statistical properties of a filtered Poisson process with additive random noise: distributions, correlations and moment estimation Theodorsen, A.; Garcia, O. E.; Rypdal, M. Physica Scripta, Vol. 92, Issue 5 https://doi.org/10.1088/1402-4896/aa694c	journal	April 2017
Fluctuation statistics in the scrape-off layer of Alcator C-Mod Kube, R.; Theodorsen, A.; Garcia, O. E. Plasma Physics and Controlled Fusion, Vol. 58, Issue 5 https://doi.org/10.1088/0741-3335/58/5/054001	journal	March 2016
Edge turbulence measurements in toroidal fusion devices Zweben, S. J.; Boedo, J. A.; Grulke, O. Plasma Physics and Controlled Fusion, Vol. 49, Issue 7 https://doi.org/10.1088/0741-3335/49/7/S01	journal	June 2007
Stochastic Modeling of Intermittent Scrape-Off Layer Plasma Fluctuations Garcia, O. E. Physical Review Letters, Vol. 108, Issue 26 https://doi.org/10.1103/PhysRevLett.108.265001	journal	June 2012
SOL width and intermittent fluctuations in KSTAR Garcia, O. E.; Kube, R.; Theodorsen, A. Nuclear Materials and Energy, Vol. 12 https://doi.org/10.1016/j.nme.2016.11.008	journal	August 2017
A Model-Based Deconvolution Approach to Solve Fiber Crossing in Diffusion-Weighted MR Imaging Dell'Acqua, Flavio; Rizzo, Giovanna; Scifo, Paola IEEE Transactions on Biomedical Engineering, Vol. 54, Issue 3 https://doi.org/10.1109/TBME.2006.888830	journal	March 2007
Particle transport in the scrape-off layer and its relationship to discharge density limit in Alcator C-Mod LaBombard, B.; Boivin, R. L.; Greenwald, M. Physics of Plasmas, Vol. 8, Issue 5 https://doi.org/10.1063/1.1352596	journal	May 2001
New insights on boundary plasma turbulence and the quasi-coherent mode in Alcator C-Mod using a Mirror Langmuir Probe LaBombard, B.; Golfinopoulos, T.; Terry, J. L. Physics of Plasmas, Vol. 21, Issue 5 https://doi.org/10.1063/1.4873918	journal	May 2014
Level crossings, excess times, and transient plasma–wall interactions in fusion plasmas Theodorsen, A.; Garcia, O. E. Physics of Plasmas, Vol. 23, Issue 4 https://doi.org/10.1063/1.4947235	journal	April 2016
Collisionality dependent transport in TCV SOL plasmas Garcia, O. E.; Pitts, R. A.; Horacek, J. Plasma Physics and Controlled Fusion, Vol. 49, Issue 12B https://doi.org/10.1088/0741-3335/49/12B/S03	journal	November 2007
Evidence for electromagnetic fluid drift turbulence controlling the edge plasma state in the Alcator C-Mod tokamak LaBombard, B.; Hughes, J. W.; Mossessian, D. Nuclear Fusion, Vol. 45, Issue 12 https://doi.org/10.1088/0029-5515/45/12/022	journal	November 2005
Fluctuation-driven transport in the DIII-D boundary Rudakov, D. L.; Boedo, J. A.; Moyer, R. A. Plasma Physics and Controlled Fusion, Vol. 44, Issue 6 https://doi.org/10.1088/0741-3335/44/6/308	journal	May 2002
Turbulence during H- and L-mode plasmas in the scrape-off layer of the ASDEX Upgrade tokamak Antar, G. Y.; Tsalas, M.; Wolfrum, E. Plasma Physics and Controlled Fusion, Vol. 50, Issue 9 https://doi.org/10.1088/0741-3335/50/9/095012	journal	July 2008
Self-similar density turbulence in the TCV tokamak scrape-off layer Graves, J. P.; Horacek, J.; Pitts, R. A. Plasma Physics and Controlled Fusion, Vol. 47, Issue 3 https://doi.org/10.1088/0741-3335/47/3/L01	journal	February 2005
Effect of discrete coherent structures on plasma-wall interactions in the scrape-off-layer D’Ippolito, D. A.; Myra, J. R. Physics of Plasmas, Vol. 15, Issue 8 https://doi.org/10.1063/1.2974802	journal	August 2008
H mode confinement in Alcator C-Mod Greenwald, M.; Boivin, R. L.; Bombarda, F. Nuclear Fusion, Vol. 37, Issue 6 https://doi.org/10.1088/0029-5515/37/6/I07	journal	June 1997
Thermal transport catastrophe and the tokamak edge density limit D’Ippolito, D. A.; Myra, J. R. Physics of Plasmas, Vol. 13, Issue 6 https://doi.org/10.1063/1.2206168	journal	June 2006
Large transport-induced operation limits of tokamak plasmas Guzdar, P. N.; Kleva, R. G.; Kaw, P. K. Physics of Plasmas, Vol. 14, Issue 2 https://doi.org/10.1063/1.2436736	journal	February 2007
An iterative technique for the rectification of observed distributions Lucy, L. B. The Astronomical Journal, Vol. 79 https://doi.org/10.1086/111605	journal	June 1974
Convective transport by intermittent blob-filaments: Comparison of theory and experiment D’Ippolito, D. A.; Myra, J. R.; Zweben, S. J. Physics of Plasmas, Vol. 18, Issue 6 https://doi.org/10.1063/1.3594609	journal	June 2011
Burst statistics in Alcator C-Mod SOL turbulence Garcia, O. E.; Cziegler, I.; Kube, R. arXiv https://doi.org/10.48550/arxiv.1205.6996	text	January 2012
Convergence of statistical moments of particle density time series in scrape-off layer plasmas Kube, Ralph; Garcia, Odd Erik arXiv https://doi.org/10.48550/arxiv.1409.8319	text	January 2014
Level crossings, excess times and transient plasma-wall interactions in fusion plasmas Theodorsen, Audun; Garcia, Odd Erik arXiv https://doi.org/10.48550/arxiv.1604.04067	text	January 2016
Scrape Off Layer profiles interpreted with filament dynamics Militello, F.; Omotani, J. T. arXiv https://doi.org/10.48550/arxiv.1604.08790	text	January 2016
On the relation between non-exponential Scrape Off Layer profiles and the dynamics of filaments Militello, F.; Omotani, J. T. arXiv https://doi.org/10.48550/arxiv.1606.04262	text	January 2016
SOL width and intermittent fluctuations in KSTAR Garcia, O. E.; Kube, R.; Theodorsen, A. arXiv https://doi.org/10.48550/arxiv.1611.03440	preprint	January 2016
Auto-correlation function and frequency spectrum due to a super-position of uncorrelated exponential pulses Garcia, O. E.; Theodorsen, A. arXiv https://doi.org/10.48550/arxiv.1702.00105	text	January 2017
Relationship between frequency power spectra and intermittent, large-amplitude bursts in the Alcator C-Mod scrape-off layer Theodorsen, A.; Garcia, O. E.; Kube, R. arXiv https://doi.org/10.48550/arxiv.1702.01104	text	January 2017
Level crossings and excess times due to a super-position of uncorrelated exponential pulses Theodorsen, Audun; Garcia, Odd Erik arXiv https://doi.org/10.48550/arxiv.1703.03732	text	January 2017
Interpretation of scrape-off layer profile evolution and first-wall ion flux statistics on JET using a stochastic framework based on filamentary motion Walkden, N. R.; Wynn, A.; Militello, F. arXiv https://doi.org/10.48550/arxiv.1706.01239	text	January 2017
Intermittent electron density and temperature fluctuations and associated fluxes in the Alcator C-Mod scrape-off layer Kube, Ralph; Garcia, Odd Erik; Theodorsen, Audun arXiv https://doi.org/10.48550/arxiv.1803.05172	text	January 2018

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