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UID:UW-Physics-Event-9497
DTSTART:20251205T200000Z
DTEND:20251205T220000Z
DTSTAMP:20260413T084209Z
LAST-MODIFIED:20251114T184546Z
LOCATION:Chamberlin Hall Room 5310
SUMMARY:Oblique dipole rotator to emulate a pulsar wind\, Preliminary 
 Exam\, Rene Flores Garcia
DESCRIPTION:We are building a dipolar rotating magnetic field (RMF) sy
 stem to emulate the magnetosphere of an obliquely rotating pulsar and 
 demonstrate production of an outgoing plasma wind. We intend to form a
  striped plasma wind similar to that surrounding a neutron star and po
 tentially to observe magnetic reconnection within the stripes. The dri
 ver will consist of an orthogonal pair of Helmholtz-like drive coils p
 owered by IGBT H-bridges producing 5 kA per turn on each coil generati
 ng ~10 G of magnetic field half a meter away from the center of the co
 ils. The coils will be placed at atmospheric pressure in an alumina-co
 ated fiberglass pressure vessel within the high-vacuum plasma chamber.
  Fuel gas will be puffed from outlets on the surface of the vessel\, a
 nd the RMF will ionize the gas\, hydrogen\, helium and deuterium being
  possible fuel options. Experimental hardware is in development. Fueli
 ng system is currently being tested to ensure that the driver receives
  enough neutral gas to ionize and form a plasma\, while additional pla
 smas sources are also being considered. Diagnostics will consist of an
  existing magnetic Hall probe array and a triple-Langmuir-Mach probe a
 rray currently being manufactured. Key next steps are to test the new 
 solid-state RMF drivers at full power\, to implement the fueling syste
 m\, and to test plasma production in a cylindrical vacuum chamber\, wi
 th plasma experiments on the Big Red Ball with spherical geometry and 
 edge magnetic confinement as a longer-term objective.
URL:https://www.physics.wisc.edu/events/?id=9497
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