Results 11 to 20 of about 474,973 (216)

The effect of impurity seeding on edge toroidal rotation in the ADITYA-U tokamak

Nuclear Fusion
Intrinsic toroidal rotation velocity ( V _φ ) has been measured from the Doppler shift of C ^5+ carbon spectral lines (at 529.05 nm) in the edge region of the ADITYA-U tokamak without any auxiliary torque input in an ohmically heated pure hydrogen (H _2 )
Ankit Kumar, K. Shah, M.B. Chowdhuri, N. Ramaiya, Aman Gauttam, K.A. Jadeja, Bharat Hedge, N. Yadava, Kaushlender Singh, Suman Dolui, Tanmay Macwan, Ashok Kumawat, Pramila Gautam, Laxmikanta Pradhan, Harshita Raj, G. Shukla, Dipexa Modi, S. Patel, Soumitra Banerjee, Injamul Hoque, Komal, Suman Aich, Ankit Patel, Utsav, A. Kanik, Rohit Kumar, Priyanka Verma, K.M. Patel, Kalpesh Galodiya, M. Shah, R.L. Tanna, Joydeep Ghosh   +31 more
doaj   +2 more sources

Toroidal plasma rotation in the TCV tokamak

Plasma Physics and Controlled Fusion, 2006
The first toroidal rotation measurements in TCV ohmic L-mode plasmas with no external momentum injection are presented. The toroidal velocity profile of the fully stripped carbon species is measured by active Charge eXchange Recombination Spectroscopy with a temporal resolution of typically 90 ms and a spatial resolution of 2.5 cm, about 1/10 of the ...
Scarabosio, A., Bortolon, A., Duval, B. P., Karpushov, A., Pochelon, A.   +4 more
openaire   +3 more sources

Comparison of core Ar17+ and Mo32+ toroidal rotation in C-Mod plasmas

Nuclear Fusion, 2023
Core ( r / a   $\lt$  0.5) toroidal rotation from argon (Ar ^17+ , 40 AMU) and molybdenum (Mo ^32+ , 96 AMU) ions has been compared in C-Mod tokamak plasmas over a wide range of operating conditions and confinement schemes, including Ohmic L-mode in the ...
J.E. Rice, C. Angioni, N.M. Cao, M.L. Reinke   +3 more
doaj   +2 more sources

Measurement of MAST edge ion temperatures and velocities [PDF]

, 2011
A novel experimental method using gas puffing of neutrals to stimulate charge exchange emission has been developed to measure ion temperatures and toroidal rotation velocities in the edge of MAST.
Morgan, Thomas
core   +6 more sources

Toroidal Rotation Produced by Disruptions and ELMs [PDF]

, 2014
In several experiments, including JET r 1 s , Alcator C-Mod r 2 s , and NSTX r 3 s , it was observed that disruptions were accompanied by toroidal rotation. There is a concern that there may be a resonance between rotating toroidal perturbations and the resonant frequencies of the ITER vacuum vessel, causing enhanced damage.
Strauss HR, Paccagnella R, Sugiyama L, Breslau J, Jardin S   +4 more
openaire   +1 more source

Intrinsic Rotation of Toroidally Confined Magnetohydrodynamics [PDF]

Physical Review Letters, 2012
Accepted for publication in Physical Review ...
Morales, Jorge, Bos, Wouter J.T., Schneider, Kai, Montgomery, David   +3 more
openaire   +4 more sources

Toroidal Rotation Driven by the Polarization Drift [PDF]

Physical Review Letters, 2009
Starting from a phase space conserving gyrokinetic formulation, a systematic derivation of parallel momentum conservation uncovers a novel mechanism by which microturbulence may drive intrinsic rotation. This mechanism, which appears in the gyrokinetic formulation through the parallel nonlinearity, emerges due to charge separation induced by the ...
Mcdevitt, C.J., Diamond, P.H., Gürcan, Özgür, Hahm, T.S.   +3 more
openaire   +4 more sources

Zoom system by rotation of toroidal lenses

Optics Express, 2020
In a recent publication [Appl. Opt. 57, 8087 (2018).] a zoom system based on rotating toroidal lenses had been theoretically suggested. Here we demonstrate two different experimental realizations of such a system. The first consists of a set of four individually rotatable cylindrical lenses, and the second of four rotatable diffractive optical elements
Nicola Bregenzer, Martin Bawart, Stefan Bernet   +2 more
openaire   +2 more sources

ROTATING ELECTROMAGNETIC WAVES IN TOROID-SHAPED REGIONS [PDF]

International Journal of Modern Physics C, 2010
Electromagnetic waves, solving the full set of Maxwell equations in vacuum, are numerically computed. These waves occupy a fixed bounded region of the three-dimensional space, topologically equivalent to a toroid. Thus, their fluid dynamics analogs are vortex rings.
CHINOSI, Claudia, DELLA CROCE L, FUNARO D.   +2 more
openaire   +5 more sources

Toroidal dipolar supersolid with a rotating weak link

Physical Review A, 2023
Ring-shaped superfluids with weak links provide a perfect environment for studying persistent currents and dynamic stirring protocols. Here, we investigate the effects of a weak-link system on dipolar supersolids. By calculating the ground state energy at fixed angular momenta, we find that metastable persistent currents may exist in the supersolid ...
M. Nilsson Tengstrand, P. Stürmer, J. Ribbing, S. M. Reimann   +3 more
openaire   +2 more sources