Use more robust calculation of the emittance. #240
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RemiLehe
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RemiLehe
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This works and fixes the problem :) |
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In the issue reported in #236, it turns out that, for some input parameters, the simulation returned on only 2 macroparticles at the end of the acceleration stage.
In this case, this case, the emittance should be exactly 0, but due to floating-point errors, the quantity
x2*u2 -xu**2happened to be negative.This PR checks that the number of particles is bigger than 2, to avoid this type of error