BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-9624
DTSTART:20260309T170000Z
DTEND:20260309T180000Z
DTSTAMP:20260501T201708Z
LAST-MODIFIED:20260307T173509Z
LOCATION:
SUMMARY:Versatile Nonlinear Laser-based Diagnostics for High Spatio-te
 mporal Measurements in High to Low Pressure Plasmas \, Plasma Physics 
 (Physics/ECE/NE 922) Seminar\, Prof. Marien Simeni\, University of Min
 nesota
DESCRIPTION:Highly sensitive\, space-time resolved electric field vect
 or measurements are essential for addressing numerous critical questio
 ns across nearly all sub-fields of plasma physics. These measurements 
 are crucial for understanding edge-localized mode plasma instabilities
  in tokamaks\, unraveling surface streamers and ionization wave dynami
 cs\, analyzing surface charging in low-temperature plasmas\, gaining i
 nsights into magnetic reconnection events\, and validating fundamental
  sheath theories under different collisionality regimes. In this talk\
 , I will present a novel laser-based approach for electric field measu
 rements that offers exceptional sensitivity across multiple orders of 
 magnitude and is suitable for both high and low pressure plasmas. Addi
 tionally\, I will demonstrate how this setup can simultaneously perfor
 m gas density measurements\, providing reduced electric field estimate
 s. We anticipate that this newly developed approach will be applicable
  to a wide variety of plasma physics sub-fields\, making electric fiel
 d measurements more accessible and straightforward.<br>
\n<br>
\nBio: 
 Marien Simeni is an Assistant Professor at the Mechanical Engineering 
 Department of the University of Minnesota (UMN)\, where he started in 
 April 2022. His research group focuses on the development of ultrafast
  laser diagnostics to unravel kinetic mechanisms and energy transfers 
 in non-equilibrium and laser-produced plasmas as well as in reactive f
 lows. Marien received his B.S. in physics from Ecole Normale Superieur
 e Cachan and Université Pierre et Marie Curie (France) in 2009\, his 
 M.S. in aerospace engineering from Ecole Centrale Paris (France) in 20
 11 and his Ph.D. in aerospace engineering from the same institution in
  2015. He subsequently held a postdoctoral position at the Ohio State 
 University (2015-2018)\, a research associate position at UMN (2018-20
 20) and an associate research physicist position at the Princeton Plas
 ma Physics Laboratory (2020-2022). Marien is a recipient of the 2024 D
 OE Early Career Award.
URL:https://www.physics.wisc.edu/events/?id=9624
END:VEVENT
END:VCALENDAR