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SUMMARY:Clustering of macroparticles in simulations of plasma wakefield ac
 celeration
DTSTART;VALUE=DATE-TIME:20240418T053000Z
DTEND;VALUE=DATE-TIME:20240418T055000Z
DTSTAMP;VALUE=DATE-TIME:20260906T234051Z
UID:indico-contribution-219@indico.nsrrc.org.tw
DESCRIPTION:Speakers: Konstantin Lotov (Budker INP)\nSimulations of plasma
  wakefield acceleration are challenging for many reasons\, one of which is
  that the wave scale (about plasma skin depth) is much larger than the Deb
 ye length. Attempting to resolve both would make simulations prohibitively
  expensive. Therefore\, grid steps far exceeding the Debye length are used
 \, which compromises the accuracy of PIC simulations. While this inconsist
 ency does not notably impact short-term processes spanning several wave pe
 riods\, long-term simulations lead to clustering and unphysical heating of
  plasma electrons.\nThe latter undesirable effects can be avoided by sligh
 tly modifying the law of plasma particle motion\, which is implemented in 
 the newly developed 3d version of LCODE. The new feature enables much clea
 ner simulations of long-term wave evolution. In particular\, when the nume
 rical heating of plasma electrons is suppressed\, the wake chaotization an
 d premature transverse wavebreaking of a moderately nonlinear plasma wave 
 disappear.\n\nhttps://indico.nsrrc.org.tw/event/16/contributions/219/
LOCATION:Research Building A119
URL:https://indico.nsrrc.org.tw/event/16/contributions/219/
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