BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-5003
DTSTART:20190408T170500Z
DURATION:PT1H0M0S
DTSTAMP:20260419T084818Z
LAST-MODIFIED:20190214T143601Z
LOCATION:2241 Chamberlin Hall
SUMMARY:Observation of nonlinear coupling between Kelvin-Helmholtz and
  drift wave instability in IMPED\, Plasma Physics (Physics/ECE/NE 922)
  Seminar\, Prabal Chattopadhyay\, Institute for Plasma Research (India
 )
DESCRIPTION:The unique control features of Inverse Mirror Plasma Exper
 imental Device (IMPED)[1] enables production of magnetized plasmas wit
 h variable radial density\, potential and electron temperature profile
 s over a wide range. The radial density and potential profiles are tai
 lored to simultaneously excite Kelvin-Helmholtz and drift wave instabi
 lity. These instabilities are observed to interact nonlinearly with ea
 ch other leading to the formation of side bands. Bispectral analysis h
 as been used to experimentally confirm the nonlinear coupling. The sid
 e bands are usually asymmetric in nature. However\, the extent of asym
 metry\, i.e. the ratio of the power of the left to the right side band
  is controlled experimentally\, which occasionally leads to symmetric 
 side bands. The method of excitation and control of these instabilitie
 s and the probable mechanism of power distribution in side bands is pr
 esented.
URL:https://www.physics.wisc.edu/events/?id=5003
END:VEVENT
END:VCALENDAR