|Message: problems with accuracy||Not Logged In (login)|
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I am trying to simulate a lattice for an interaction region composed of dipole and quadrupole magnets. I have been analyzing the optics of a gaussian electron beam as it traverses the magnet lattice. I am comparing the optics geant produces to optics produced by MAD-X however I get results that deviate on the micron scale in rms beam size. Since I am using 10,000 initial particles I do not have a perfect gaussian. Could this possibly be causing these deviations? What are the limits of tracking in geant, i.e. what accuracy is possible after ~45 m and traversing multiple volume boundaries and magnetic fields? Is there any way to imput a perfectly gaussian beam distribution without increasing the number of particles? I am not sure if this is the right category for these questions.
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