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Question Two peaks in energy deposition inside a magnet coil 

Forum: Particles
Date: 01 Feb, 2012
From: Agnieszka Priebe <Agnieszka Priebe>

Hello,

Iíve been using Geant4 for simulations of the particle losses inside superconducting magnets. In general, from my simulations I obtain energy deposited inside the coils and signals of secondary particles given by detectors located outside the magnet cryostat.

The magnet representation is as follows (going from the centre of aperture): a beam screen, a beam pipe, a coil, collars, a yoke etc. My ParticleGun is set to be on the beam screen and impacting with a very little angle (202 microrad). I consider point-like losses (no beam shape implemented). There is one think which I donít understand. On a plot of energy deposition as a function of z I obtain two peaks although my geometry is uniform over there (there are no discontinuity). It looks like overlapping of two Gaussian-shape curves. Do you have any idea what it could be?

Iíve tried to correlate heights of the peaks and their widths with widths of the beam screen and the beam pipe as but it wasnít very conclusiveÖ

I would be grateful for any hints.

Best regards, Agnieszka Priebe

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2012/02/01/08.29-8658-Edep_z0.gif

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