dorsal/arxiv
View SchemaThe toroidal momentum pinch velocity
| Authors | A. G. Peeters, C. Angioni, D. Strintzi |
|---|---|
| Categories | |
| ArXiv ID | physics/0701147 |
| URL | https://arxiv.org/abs/physics/0701147 |
Abstract
In this letter a pinch velocity of toroidal momentum is shown to exist for the first time. Using the gyro-kinetic equations in the frame moving with the equilibrium toroidal velocity, it is shown that the physics effect can be elegantly formulated through the ``Coriolis'' drift. A fluid model is used to highlight the main coupling mechanisms between the density and temperature perturbations on the one hand and the perturbed parallel flow on the other. Gyro-kinetic calculations are used to accurately asses the magnitude of the pinch. The pinch velocity leads to a radial gradient of the toroidal velocity profile even in the absence of a torque on the plasma. It is shown to be sizeable in the plasmas of the International Thermonuclear Experimental Reactor (ITER) leading to a moderately peaked rotation profile. Finally, the pinch also affects the interpretation of current experiments.
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"abstract": "In this letter a pinch velocity of toroidal momentum is shown to exist for\nthe first time. Using the gyro-kinetic equations in the frame moving with the\nequilibrium toroidal velocity, it is shown that the physics effect can be\nelegantly formulated through the ``Coriolis\u0027\u0027 drift. A fluid model is used to\nhighlight the main coupling mechanisms between the density and temperature\nperturbations on the one hand and the perturbed parallel flow on the other.\nGyro-kinetic calculations are used to accurately asses the magnitude of the\npinch. The pinch velocity leads to a radial gradient of the toroidal velocity\nprofile even in the absence of a torque on the plasma. It is shown to be\nsizeable in the plasmas of the International Thermonuclear Experimental Reactor\n(ITER) leading to a moderately peaked rotation profile. Finally, the pinch also\naffects the interpretation of current experiments.",
"arxiv_id": "physics/0701147",
"authors": [
"A. G. Peeters",
"C. Angioni",
"D. Strintzi"
],
"categories": [
"physics.plasm-ph"
],
"title": "The toroidal momentum pinch velocity",
"url": "https://arxiv.org/abs/physics/0701147"
},
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