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BEGIN:VEVENT
DTSTAMP:20260428T040203Z
DTSTART;VALUE=DATE-TIME:20221025T150000
DTEND;VALUE=DATE-TIME:20221025T160000
SUMMARY:Oliver Allanson (Exeter): The importance of nonlinear physics in 
 radiation belt modelling
TZID:Europe/London
UID:20221025-8a1785d883adf4250183c725e17b2ad3@warwick.ac.uk
CREATED:20221011T134630Z
DESCRIPTION:The Earth's Outer Radiation Belt is a dynamic relativistic pl
 asma population that is geomagnetically trapped in near-Earth space - th
 e inner magnetosphere. This population is very challenging to model\, wi
 th dynamics evolving on - and determined by - spatial and temporal scale
 s that range from milliseconds to days\, and gyroradii to Earth radii. A
 side from being a very interesting and challenging physics problem\, acc
 urate modelling and prediction is important for safeguarding the operati
 onal satellites in orbit that underpin modern society. There is therefor
 e a growing interest in operational space weather forecasts\, such as th
 ose based on the model developed at the British Antarctic Survey (BAS-RB
 M)\, and now being incorporated into the UK MET Office Space Weather sui
 te. ā€˜Non-adiabaticā€™ transport and acceleration of radiation belt particl
 es is largely determined by resonant interactions with electromagnetic w
 aves. Existing radiation belt modelling overwhelmingly relies upon 'quas
 ilinear' techniques that essentially treat electromagnetic waves as havi
 ng very small amplitudes. However\, recent satellite datasets have demon
 strated the prevalence of large amplitude (aka 'nonlinearā€™) electromagne
 tic waves. These effects have not yet been quantified or implemented on 
 operational modelling scales. Understanding the impact of nonlinear wave
 s on radiation belt particle populations is therefore an important quest
 ion - and we hope to try and find some answers! In this talk I will give
  some review\, and discuss recent and planned work.
LOCATION:
CATEGORIES:CFSA Seminar
LAST-MODIFIED:20221011T134630Z
ORGANIZER;CN=Anne-Marie Broomhall:
END:VEVENT
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