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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-5002
DTSTART:20190401T170500Z
DURATION:PT1H0M0S
DTSTAMP:20260419T084745Z
LAST-MODIFIED:20190322T184926Z
LOCATION:2241 Chamberlin Hall
SUMMARY:Electrostatically driven helical plasma state\, Plasma Physics
  (Physics/ECE/NE 922) Seminar\, John Finn\, Tibbar Plasma Technologies
DESCRIPTION:I will describe a novel plasma state found in resistive MH
 D simulations. This state starts with a uniform applied axial magnetic
  field in a periodic cylinder and is driven electrostatically by helic
 al electrodes. We focus on m=n=1. For sufficiently strong helical driv
 e the mean field of the state has field line field line safety factor 
 q(r) just above the pitch of the electrodes m/n=1 except near the edge
 \, where q increases monotonically. This state is characterized as a s
 ingle helicity Ohmic equilibrium with the helical symmetry of the appl
 ied field. This state is analyzed in terms of Pfirsch-Schlueter curren
 ts\, flux conversion in helical geometry\, and magnetic helicity. Poss
 ible applications to current drive in toroidal confinement devices and
  to DC-DC electrical transformers are discussed.<br>
\n<br>
\nCollabor
 ators: C. Akcay\, R. Nebel and D. Barnes
URL:https://www.physics.wisc.edu/events/?id=5002
END:VEVENT
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