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Evidence of Flow Stabilization in the ZaP Z Pinch Experiment
| Content Provider | Semantic Scholar |
|---|---|
| Author | Shumlak, Uri Crawford, Emily Angerer Golingo, Raymond Nelson, Brian A. Zyrmpas, A. Den, Dunnen Johannes Theodorus Hartog Holly, Donald |
| Copyright Year | 2000 |
| Abstract | The stabilizing effect of an axial flow on the m = 1 kink instability in Z pinches has been studied numerically with a linearized ideal MHD model to reveal that a sheared axial flow stabilizes the kink mode when the shear exceeds a threshold. The sheared flow stabilizing effect is investigated with the flow-through Z pinch experiment, ZaP. An azimuthal array of surface mounted magnetic probes located at the midplane of the 50 cm long pinch plasma measures the fluctuation levels of the azimuthal modes m = 1, 2, and 3. After pinch formation a quiescent period is found where the mode activity is reduced to a few percent of the average field. Optical images from a fast framing camera and a HeNe interferometer also indicate a stable pinch plasma during this time. Doppler shift measurements of a C-III line correspond to an axial flow velocity of 9.6×10 m/s internal to the pinch. During the time when the axial plasma flow is high, the plasma experiences a quiescent period which lasts approximately 800 exponential growth times predicted by linear theory for a static plasma. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www-pub.iaea.org/mtcd/publications/pdf/csp_008c/pdf/icp_12.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
