Author: Miracoli, R.
Paper Title Page
TUXZO02
Experimental Evidence of E.M. trapped E.M. waves in a Simple Mirror Magnetic-Trap  
 
  • G. Castro, L. Celona, S. Gammino, O. Leonardi, D. Mascali, G. Torrisi
    INFN/LNS, Catania, Italy
  • R. Miracoli
    ESS Bilbao, Zamudio, Spain
 
  This work presents the first experimental characterization of cavity modes trapped within a plasma column in an axis-symmetric magnetic trap. Trapped wave has been characterized by means of a movable antenna as a function of the Bmin/BECR ratio and plasma parameters. The study demonstrates that E.M waves can be enclosed two R-cutoff layers, close to the B minimum position. Results suggest that the trapped waves consist of waves propagating across the magnetic field and storing large part of the E.M. power. If R-cut-off is removed by increasing the density, trapped waves are not detected longer. A typical Electron Energy Distribution Function composed by two different electron populations is measured in the layer where trapped waves are revealed, suggesting that additional heating is occurring.  
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