[fluka-discuss]: calculating the momentum from the kinetic energy in the source.f routine

From: sabrina bechet <sabrina.bechet_at_eli-beams.eu>
Date: Thu, 28 Jul 2016 17:38:33 +0200

Dear Fluka experts,

I am using the source.f routine to characterize my beam and I define the
momentum (PMOFLK) based on the known kinetic energy (TKEFLK). The
formula for this in the source.f routine is
PMOFLK (NPFLKA) = SQRT ( TKEFLK (NPFLKA) * ( TKEFLK (NPFLKA) + TWOTWO *
AM (IONID) ) )
while,from relativistic relations, I would have used
PMOFLK (NPFLKA) = SQRT ( TKEFLK (NPFLKA) * ( TKEFLK (NPFLKA) + TWOTWO *
AM (IONID) * TKEFLK (NPFLKA) ) ) .
Could you explain me why the last term TKEFLK (NPFLKA) is missing in the
routine? Is there anything that I misinterpret?

Many thanks,
Sabrina

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Received on Thu Jul 28 2016 - 19:24:41 CEST

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