Phys. Rev. Lett. 92, 095003 (2004) [4 pages]Poloidal E×B Drift Used as an Effective Rotational Transform to Achieve Long Confinement Times in a Toroidal Electron PlasmaReceived 10 September 2003; published 4 March 2004 Electron plasmas with mean densities of 5.0×106 cm-3 have been confined for as long as 18 ms in a partially toroidal trap with a purely toroidal magnetic field (B0=196 G, Ro=43 cm, a=5 cm). Confinement is limited to 2.0 ms unless feedback is employed to suppress the growth of a toroidal version of the m=1 diocotron mode. The confinement time is much longer than all characteristic single-particle drift time scales and therefore confirms the existence of an equilibrium in which the space-charge-generated E×B drift acts as an effective rotational transform. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.095003
DOI:
10.1103/PhysRevLett.92.095003
PACS:
52.27.Jt, 52.55.Hc, 52.55.Dy
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.