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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-9067
DTSTART:20250224T180000Z
DTEND:20250224T191500Z
DTSTAMP:20260413T151416Z
LAST-MODIFIED:20250121T194110Z
LOCATION:1227 Engineering Hall
SUMMARY:"Radiatively-cooled Magnetic Reconnection Experiments on the Z
  Machine"\, Plasma Physics (Physics/ECE/NE 922) Seminar\, Jack Hare\, 
 Cornell University
DESCRIPTION:Magnetic reconnection is a fundamental plasma process whic
 h explosively dissipates magnetic energy and changes magnetic topology
 . In many astrophysical plasmas\, such as the solar chromosphere\, the
  interstellar medium\, and pulsar magnetospheres\, the heated plasma r
 apidly radiates away thermal energy in the form of high energy X-rays\
 , leading to cooling instabilities including the complete radiative co
 llapse of the reconnection layer. Analytical theory by Uzdensky and Mc
 Kinney suggests this collapse process dramatically accelerates the rec
 onnection rate\, and simulations suggest that the plasmoids formed thr
 ough the tearing instability are the regions of strongest emission wit
 hin the reconnection layer. In this talk\, I will present results from
  experiments designed to study radiatively cooled magnetic reconnectio
 n in the laboratory. Using a suite of diagnostics including X-ray and 
 optical imaging\, spectroscopy\, magnetic probes\, and laser shadowgra
 phy and interferometry\, we demonstrate the formation of these bright 
 plasmoids and their subsequent rapid cooling and radiative collapse.
URL:https://www.physics.wisc.edu/events/?id=9067
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