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Dear Bart,
I just have an rectification of an detail:
I quote:
My understanding is that this source uses the magnetic field of the
laser light as an undulator with about 10T field strength, virtually
perfect harmonic behaviour and a few thousand periods over the length of
the straight section because the period is only ~700nm long (or whatever
laser wavelength they end up using).
I would like to question the amplitude of the magnetic field.
In my calculation using an intensity of a planar electromagnetic wave in
vacuum given as
I [W/m2]=1/2.epsilon0.c.E0^2
with
c: speed of light
E0: the amplitude of the electric field
and the relation E0/B0=c
B0: the amplitude of the magnetic field
I get for an intensity of the laser beam of 1e10 W/m2 an amplitude of
the magnetic field around 0.01 T.
It seems difficult to me to increase much the intensity of the laser, in
particular as B~sqrt(I).
Greetings
Wim
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Wim Burmeister
Professeur, Membre de l'Institut Universitaire de France
Laboratoire de Virologie Moleculaire et Structurale FRE 2854 CNRS-UJF
c/o EMBL, 6 rue Jules Horowitz
B.P. 181, F-38042 Grenoble Cedex 9 FRANCE
E-mail: [EMAIL PROTECTED]
Tel: +33 (0) 476 20 72 82 Fax: +33 (0) 476 20 94 00
http://www2.ujf-grenoble.fr/pharmacie/laboratoires/gdrviro
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