Hallo,
ich wollte mir ansehen, wie sich ein relativistisches
geladenes Teilchen in einem Raum mit elektrischen und
magnetischen Feldern verhaelt. Dazu habe ich das
Mathematica (5.1) Notebook, welches auch an diese
eMail angehangen ist, geschrieben.
Darin loese ich die dreidimensionalen Bewegungsgleichung-
en des besagten Teilchens mit Hilfe der NDSolve-Funktion
von Mathematica (5.1) komponentenweise.
Jedoch bricht Mathematica seine Berechnung mit den
Standardparametern leider bei 10000 Iterationschritten ab.
Ein Aufruf von NDSolve mit "MaxSteps -> 'ESC' inf 'ESC'"
fuehrt aber nun dazu, dass der Computer ueber Wochen
beschaeftigt ist, ohne richtig voranzukommen.
Erhoeht man den Wert der Funktion EE_z[t_] (des elektrischen
Feldes in z-Richtung) auf unrealistische Werte (also von
0.003 auf 300000) so stellt Mathematica binnen kuerzester
Zeit das richtige Ergebnis dar.
Nun meine Frage:
Kann ich diesen NDSolve Algor. irgendwie fuer die
realistischen (sich im Notebook befindenden) Werte
beschleunigen??
Oder hat jemand eine andere Idee, wie ich mein Problem
loesen kann?
Vielen Dank und Gruesse aus Berlin
Hakan
--
|
| Hakan Onel
|
| phone: +49-331-7499-397, fax: +49-331-7499-352
|
| + Remark:
| Some eMail programs are not able to code/decode the special
| sign in my last name.
| My last name coded in LaTeX-notation is \"O{}nel.
|
| + Quote of the month:
| "Equations are more important to me, beause politics is for
| present, but an equation is somthing for eternity."
| (Albert Einstein)
--
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