Zobrazeno 1 - 10
of 1 913
pro vyhledávání: '"Rhodes, A L"'
Counting complexity characterizes the difficulty of computing functions related to the number of valid certificates to efficiently verifiable decision problems. Here we study additive approximations to a quantum generalization of counting classes kno
Externí odkaz:
http://arxiv.org/abs/2411.02602
Autor:
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.
A new frequency-stepped Doppler backscattering (DBS) system has been integrated with a real-time steerable electron cyclotron heating launcher to probe local background turbulence (f<10 MHz) and high-frequency (20-550 MHz) density fluctuations in the
Externí odkaz:
http://arxiv.org/abs/2410.13028
Autor:
Teo, N. Q. X., Hall-Chen, V. H., Barada, K., Ng, R. J. H., Gu, L., Yeoh, A. K., Pratt, Q. T., Garbet, X., Rhodes, T. L.
In H-mode tokamak plasmas, the plasma is sometimes ejected beyond the edge transport barrier. These events are known as edge localized modes (ELMs). ELMs cause a loss of energy and damage the vessel walls. Understanding the physics of ELMs and by ext
Externí odkaz:
http://arxiv.org/abs/2406.01464
Autor:
Ernst, D. R., Bortolon, A., Chang, C. S., Ku, S., Scotti, F., Wang, H. Q., Yan, Z., Chen, Jie, Chrystal, C., Glass, F., Haskey, S., Hood, R., Khabanov, F., Laggner, F., Lasnier, C., McKee, G. R., Rhodes, T. L., Truong, D., Watkins, J.
Publikováno v:
Phys. Rev. Lett. 132, 235102 (2024)
Multi-machine empirical scaling predicts an extremely narrow heat exhaust layer in future high magnetic field tokamaks, producing high power densities that require mitigation. In the experiments presented, the width of this exhaust layer is nearly do
Externí odkaz:
http://arxiv.org/abs/2403.00185
Autor:
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.
Enhanced $D_{\alpha}$ H-mode (EDA H-mode), an ELM-free H-mode regime, is explored in neutral beam heated, lower single null plasmas with near zero torque injection. This regime exhibits a good energy confinement ($\mathrm{H}_{\mathrm{98y2}}$ $\sim 1$
Externí odkaz:
http://arxiv.org/abs/2402.06789
Autor:
Hong, R., Rhodes, T. L., Ren, Y., Diamond, P. H., Jian, X., Zeng, L., Barada, K., Yan, Z., McKee, G. R.
Publikováno v:
Physics of Plasmas 30, 072512 (2023)
A dimensionless collisionality scan has been performed in H-mode plasmas on DIII-D tokamak, with detailed measurements of intermediate-to-high wavenumber turbulence using Doppler backscattering systems. It is found that the shorter wavelength turbule
Externí odkaz:
http://arxiv.org/abs/2303.00059
Autor:
Chowdhury, S., Crocker, N. A., Peebles, W. A., Rhodes, T. L., Zeng, L., Van Compernolle, B., Brookman, M., Pinsker, R. I., Lau, C.
A novel quadrature Doppler Backscattering (DBS) system has been developed and optimized for the E-band (60-90GHz) frequency range using either O-mode or X-mode polarization in DIII-D plasmas. In general, DBS measures the amplitude of density fluctuat
Externí odkaz:
http://arxiv.org/abs/2302.03009
Autor:
Hall-Chen, Valerian H., Parra, Felix I., Hillesheim, Jon C., Ruiz, Juan Ruiz, Crocker, Neal A., Shi, Peng, Chu, Hong Son, Freethy, Simon J., Kogan, Lucy A., Peebles, William A., Pratt, Quinn T., Rhodes, Terry L., Ronald, Kevin, Scannell, Rory, Speirs, David C., Storment, Stephen, Trisno, Jonathan
The Doppler backscattering (DBS) diagnostic, also referred to as Doppler reflectometry, measures turbulent density fluctuations of intermediate length scales. However, when the beam's wavevector is not properly aligned perpendicular to the magnetic f
Externí odkaz:
http://arxiv.org/abs/2211.17141
Autor:
Hall-Chen, Valerian H., Damba, Julius, Parra, Felix I., Pratt, Quinn T., Michael, Clive A., Peng, Shi, Rhodes, Terry L., Crocker, Neal A., Hillesheim, Jon C., Hong, Rongjie, Ni, Shikang, Peebles, William A., Png, Ching Eng, Ruiz, Juan Ruiz
We use the beam model of Doppler backscattering (DBS), which was previously derived from beam tracing and the reciprocity theorem, to shed light on mismatch attenuation. This attenuation of the backscattered signal occurs when the wavevector of the p
Externí odkaz:
http://arxiv.org/abs/2209.15303
Publikováno v:
In Developmental and Comparative Immunology January 2025 162
