BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:4
UID:UW-Physics-Event-8618
DTSTART:20240311T203000Z
DTEND:20240311T213000Z
DTSTAMP:20260413T223353Z
LAST-MODIFIED:20240310T131704Z
LOCATION:B343 Sterling Hall
SUMMARY:Structuring Light: The Next Frontier in Laser-Plasma Interacti
 ons\, Plasma Seminar\, Andrew Longman\, Lawrence Livermore National La
 b
DESCRIPTION:Recently\, orbital angular momentum (OAM) beams have demon
 strated at relativistic intensities at several high-power laser facili
 ties around the world using off-axis spiral phase mirrors. The additio
 nal angular momentum carried by OAM beams\, even when linearly polariz
 ed\, introduces a new control parameter in laser plasma interactions a
 nd has shown promise to introduce new and exciting phenomena not possi
 ble with a standard Gaussian beam. 
\nOf particular interest to this s
 eminar is the relativistic inverse Faraday effect where laser angular 
 momentum is absorbed by a plasma generating large axial magnetic field
 s colinear with the laser k vector. Our recent work has demonstrated t
 hat magnetic fields on the order of 100’s of Tesla\, extending 100â€
 ™s of microns\, and lasting on the order of 10 picoseconds can be gene
 rated with laser powers less than 5 terawatts. I will present results 
 from a recent campaign at the COMET laser at Lawrence Livermore Nation
 al Laboratory in which we used a linearly polarized Laguerre Gaussian 
 laser to drive magnetic fields for the first time in the laboratory. E
 xperimental results will be compared and validated against theory and 
 simulations.
URL:https://www.physics.wisc.edu/events/?id=8618
END:VEVENT
END:VCALENDAR