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UID:UW-Physics-Event-8260
DTSTART:20230424T170000Z
DURATION:PT1H0M0S
DTSTAMP:20260414T053037Z
LAST-MODIFIED:20230413T022228Z
LOCATION:2241 Chamberlin Hall
SUMMARY:Dipole Traps for Non-neutral and Pair Plasma Studies\, Plasma 
 Physics (Physics/ECE/NE 922) Seminar\, Matthew Stoneking\, Lawrence Un
 iversity
DESCRIPTION:The root source of the ubiquitous instabilities that lead 
 to turbulence in magnetized plasmas can\, in many cases\, be traced to
  the asymmetry in the masses of the ions and electrons constituting th
 e plasma.  The APEX (A Positron-Electron eXPeriment) project aims to t
 est predictions that a “pair plasma” composed of positively and ne
 gatively charged particles of equal mass should be remarkably stable t
 o the micro-instabilities that seem universal to magnetized plasma.  W
 e are building a levitated dipole trap that uses a high-temperature su
 perconducting coil along with a high-capacity accumulation system for 
 positrons\, to create the world’s first short Debye length magnetize
 d electron-positron plasma.  Experiments in support of this project ar
 e also underway to test the accessibility of long-lived thermal equili
 brium states for pure electron plasma in a dipole field.  
URL:https://www.physics.wisc.edu/events/?id=8260
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