Real-time steerable frequency-stepped Doppler Backscattering (DBS) System for local helicon wave electric field measurements on the DIII-D tokamak

Authors: Chowdhury, S., Crocker, N. A., Peebles, W. A., Lantsov, R., Rhodes, T. L., Zeng, L., Van Compernolle, B., Tang, S., Pinsker, R. I., Torrezan, A. C., Squire, J., Rupani, R., O'Neill, R., Cengher, M.

Subject Terms: Physics - Plasma Physics

Access URL: http://arxiv.org/abs/2410.13028

ELM-free Enhanced D{\alpha} H-mode with Near Zero NBI Torque Injection in DIII-D Tokamak

Authors: Macwan, T., Barada, K., Parisi, J. F., Groebner, R., Rhodes, T. L., Banerjee, S., Chrystal, C., Pratt, Q., Yan, Z., Wang, H., Zeng, L., Austin, M. E., Crocker, N. A., Peebles, W. A.

Subject Terms: Physics - Plasma Physics

Access URL: http://arxiv.org/abs/2402.06789

A novel Doppler backscattering (DBS) system to simultaneously monitor radio frequency plasma fluctuations and low frequency turbulence

Authors: Chowdhury, S., Crocker, N. A., Peebles, W. A., Rhodes, T. L., Zeng, L., Van Compernolle, B., Brookman, M., Pinsker, R. I., Lau, C.

Subject Terms: Physics - Plasma Physics

Access URL: http://arxiv.org/abs/2302.03009

Observation of Long-Radial-Range-Correlation in Turbulence in High-Collisionality High-Confinement Fusion Plasmas

Authors: Hong, R., Rhodes, T. L., Diamond, P. H., Ren, Y., Zeng, L., Jian, X., Barada, K., Wang, G., Peebles, W. A.

Subject Terms: Physics - Plasma Physics, Nonlinear Sciences - Adaptation and Self-Organizing Systems

Access URL: http://arxiv.org/abs/2202.09881

Ray-tracing Analysis for Cross-polarization Scattering Diagnostic on MAST-Upgrade Spherical Tokamak

Authors: Hong, R., Rhodes, T. L., Wang, G., Peebles, W. A.

Source: Rev Sci Instrum 92, 063505 (2021)

Subject Terms: Physics - Plasma Physics

Access URL: http://arxiv.org/abs/2105.09818

Observation of quasi-coherent density fluctuation in scrape-off layer enhancing boundary transport in high-betaN hybrid plasmas on DIII-D

Authors: Hong, R., Rhodes, T. L., Li, Z. Y., Wang, H., Zeng, L., Barada, K., Wang, G., Watkins, J. G., Peebles, W. A.

Subject Terms: Physics - Plasma Physics

Access URL: http://arxiv.org/abs/2011.05253

A Reliable Millimeter-Wave Quadrature Interferometer

Authors: Gilmore, M., Gekelman, W., Reiling, K., Peebles, W. A.

Subject Terms: Physics - Instrumentation and Detectors, Physics - Plasma Physics

Access URL: http://arxiv.org/abs/2002.11190

Overview of recent physics results from MAST

Authors: Kirk, A, Adamek, J, Akers, RJ, Allan, S, Appel, L, Lucini, F Arese, Barnes, M, Barrett, T, Ayed, N Ben, Boeglin, W, Bradley, J, Browning, P K, Brunner, J, Cahyna, P, Carr, M, Casson, F, Cecconello, M, Challis, C, Chapman, IT, Chapman, S, Conroy, S, Conway, N, Cooper, WA, Cox, M, Crocker, N, Crowley, B, Cardnell, S, Chorley, J, Cunningham, G, Danilov, A, Darrow, D, Dendy, R, Dickinson, D, Dorland, W, Dudson, B, Easy, L, Elmore, S, Evans, M, Farley, T, Fedorczak, N, Field, A, Fitzgerald, I, Fox, M, Freethy, S, Garzotti, L, Ghim, YC, Gi, K, Gorelenkova, M, Gracias, W, Gurl, C, Guttenfelder, W, Ham, C, Harting, D, Havlickova, E, Hawkes, N, Hender, T, Henderson, S, Hillesheim, J, Hnat, B, Horacek, J, Howard, J, Howell, D, Dunai, D, Fishpool, G, Gibson, K, Harrison, J, Highcock, E, Huang, B, Inomoto, M, Imazawa, R, Jones, O, Kadowaki, K, Kaye, S, Keeling, D, Kocan, M, Kogan, L, Komm, M, Lai, W, Leddy, J, Leggate, H, Imada, K, Klimek, I, Hollocombe, J, Lipschultz, B, Lisgo, S, Liu, YQ, Lloyd, B, Lomanowski, B, Lukin, V, Maddison, G, Madsen, J, Mailloux, J, Martin, R, McArdle, G, Lupelli, I, McClements, K, McMillan, B, Meakins, A, Meyer, H, Michael, C, Militello, F, Milnes, J, Motojima, G, Muir, D, Naylor, G, Nielsen, A, O'Brien, M, O'Mullane, M, Olsen, J, Omotani, J, Ono, Y, Pamela, S, Morris, AW, O'Gorman, T, Pangione, L, Parra, F, Patel, A, Peebles, W, Perez, R, Pinches, S, Piron, L, Price, M, Reinke, M, Ricci, P, Riva, F, Roach, C, Romanelli, M, Ryan, D, Saarelma, S, Saveliev, A, Scannell, R, Schekochihin, A, Sharapov, S, Sharples, R, Shevchenko, V, Shinohara, K, Silburn, S, Simpson, J, Stanier, A, Storrs, J, Summers, H, Takase, Y, Tamain, P, Tanabe, H, Tanaka, H, Tani, K, Taylor, D, Thomas, D, Thomas-Davies, N, Thornton, A, Turnyanskiy, M, Valovic, M, Vann, R, Van Wyk, F, Walkden, N, Watanabe, T, Wilson, H, Wischmeier, M, Yamada, T, Young, J, Zoletnik, S, Team, the MAST, Team, the EUROfusion MST1

Subject Terms: Physics - Plasma Physics

Access URL: http://arxiv.org/abs/1611.06047

ELM-free enhanced Dα H-mode with near zero NBI torque injection in DIII-D tokamak.

Authors: Macwan, T., Barada, K., Parisi, J. F., Groebner, R. J., Rhodes, T. L., Banerjee, S., Chrystal, C., Pratt, Q., Yan, Z., Wang, H., Zeng, L., Austin, M. E., Crocker, N. A., Peebles, W. A.

Source: Physics of Plasmas; Dec2024, Vol. 31 Issue 12, p1-19, 19p

Subject Terms: PLASMA flow, ELECTRON temperature, NEUTRAL beams, ELECTRON density, PHASE velocity, PLASMA turbulence

Measurement of high-k density fluctuation wavenumber spectrum in MAST and Doppler backscattering for spherical tokamaks

Authors: Hillesheim, J. C., Crocker, N. A., Peebles, W. A., Meyer, H., Meakins, A., Field, A. R., Dunai, D., Carr, M., Hawkes, N., Team, the MAST

Subject Terms: Physics - Plasma Physics

Access URL: http://arxiv.org/abs/1407.2115

Dependence of intrinsic rotation reversals on collisionality in MAST

Authors: Hillesheim, J. C., Parra, F. I., Barnes, M., Crocker, N. A., Meyer, H., Peebles, W. A., Scannell, R., Thornton, A., Team, the MAST

Subject Terms: Physics - Plasma Physics

Access URL: http://arxiv.org/abs/1407.2121

Interaction between Faraday rotation and Cotton-Mouton effects in polarimetry modeling for NSTX

Authors: Zhang, J., Crocker, N. A., Carter, T. A., Kubota, S., Peebles, W. A.

Subject Terms: Physics - Plasma Physics, Physics - Optics

Access URL: http://arxiv.org/abs/1005.4649

Design of a low frequency, density profile reflectometer system for the MAST-U spherical tokamak.

Authors: Rhodes, T. L.¹ (AUTHOR) trhodes@ucla.edu, Peebles, W. A.¹ (AUTHOR), Zeng, Lei¹ (AUTHOR), Hall-Chen, Valerian² (AUTHOR), Ronald, Kevin³ (AUTHOR), Kubota, S.¹ (AUTHOR), Meng, Yusong⁴ (AUTHOR), Lantsov, R.¹ (AUTHOR), Michael, C. M.¹ (AUTHOR), Crocker, N. A.¹ (AUTHOR), Scannell, R.⁵ (AUTHOR)

Source: Review of Scientific Instruments. Aug2024, Vol. 95 Issue 8, p1-6. 6p.

Subject Terms: *ELECTRON density, *LANGMUIR probes, *REFLECTOMETRY, *PLASMA frequencies, *SPATIAL resolution, *THOMSON scattering

New millimeter-wave diagnostics to locally probe internal density and magnetic field fluctuations in National Spherical Torus Experiment-Upgrade (invited).

Authors: Macwan, T.¹, tmacwan17@ucla.edu, Barada, K.¹, Kubota, S.¹, Lantsov, R.¹, Bradley, L.¹, Pratt, Q.¹, Hong, R.¹, Michael, C. A.¹, Hall-Chen, V.², Wisniewski, J.³, Dong, J.³, Stratton, B.³, Crocker, N. A.¹, Peebles, W. A.¹, Rhodes, T. L.¹

Source: Review of Scientific Instruments; Aug2024, Vol. 95 Issue 8, p1-9, 9p

A new synthetic correlation electron cyclotron emission diagnostic for validating nonlinear gyrokinetic simulations of electron temperature turbulence.

Authors: Wang, G.¹, wanggd@ucla.edu, Rhodes, T. L.¹, Howard, N. T.², Peebles, W. A.¹

Source: Review of Scientific Instruments; Aug2024, Vol. 95 Issue 8, p1-5, 5p

A Q-band frequency tunable Doppler backscattering (DBS) system for pedestal and scrape-off layer density fluctuation and flow measurements in the DIII-D tokamak.

Authors: Damba, J.¹, julius.damba@physics.ucla.edu, Hong, R.¹, Lantsov, R.¹, Peebles, W. A.¹, Rhodes, T. L.¹

Source: Review of Scientific Instruments; Aug2024, Vol. 95 Issue 8, p1-6, 6p

Circular Corrugated Miter Bend and Gap Losses for Broadband Frequency Applications

Authors: Lau, C., Kaufman, M. C., Doyle, E. J., Hanson, G. R., Peebles, W. A., Wang, G., Zolfaghari, A.

Source: IEEE transactions on microwave theory and techniques. 67(1):38-49

Availability: http://explore.bl.uk/primo_library/libweb/action/display.do?tabs=detailsTab&gathStatTab=true&ct=display&fn=search&doc=ETOCvdc_100075252542.0x000001&indx=1&recIds=ETOCvdc_100075252542.0x000001

Analysis method for calculating radial correlation length of electron temperature turbulence from correlation electron cyclotron emission radiometer

Authors: Wang, G., Rhodes, T. L., Peebles, W. A.

Source: Review of scientific instruments. 93(11)

Availability: http://explore.bl.uk/primo_library/libweb/action/display.do?tabs=detailsTab&gathStatTab=true&ct=display&fn=search&doc=ETOCvdc_100166689462.0x000001&indx=1&recIds=ETOCvdc_100166689462.0x000001

Design elements and first data from a new Doppler backscattering system on the MAST-U spherical tokamak

Authors: Rhodes, T. L., Michael, C. A., Shi, P., Scannell, R., Storment, S., Pratt, Q., Lantsov, R., Fitzgerald, I., Hall-Chen, V. H., Crocker, N. A., Peebles, W. A.

Source: Review of scientific instruments. 93(11)

Availability: http://explore.bl.uk/primo_library/libweb/action/display.do?tabs=detailsTab&gathStatTab=true&ct=display&fn=search&doc=ETOCvdc_100166689026.0x000001&indx=1&recIds=ETOCvdc_100166689026.0x000001

Validating and optimizing mismatch tolerance of Doppler backscattering measurements with the beam model (invited)

Authors: Hall-Chen, V. H., Damba, J., Parra, F. I., Pratt, Q. T., Michael, C. A., Peng, S., Rhodes, T. L., Crocker, N. A., Hillesheim, J. C., Hong, R., Ni, S., Peebles, W. A., Png, C. E., Ruiz Ruiz, J.

Source: Review of scientific instruments. 93(10)

Availability: http://explore.bl.uk/primo_library/libweb/action/display.do?tabs=detailsTab&gathStatTab=true&ct=display&fn=search&doc=ETOCvdc_100163661353.0x000001&indx=1&recIds=ETOCvdc_100163661353.0x000001