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Hi Antoine,
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<div class="">I think this might be related to using the 2Din3D ray tracing combined with a radial grid for the rays. On a 2D radial grid, with points equally spaced in radius and angle the density of rays will be higher closer to r=0, and so the laser power
is distributed amongst a larger number of rays, so the individual rays will have less power than farther away. You might be able to account for this by weighing the ray power by a factor of 1/r to account for the change in ray density.</div>
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<div class=""> You can see that the energy deposition in your plot seems to match the expected profile.</div>
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<div class="">Adam<br class="">
<div><br class="">
<blockquote type="cite" class="">
<div class="">On Feb 23, 2022, at 11:19 AM, Antoine Gintrand <<a href="mailto:antoine.gintrand@gmail.com" class="">antoine.gintrand@gmail.com</a>> wrote:</div>
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<div class="">Dear flash users,</div>
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<div class="">I have a problem concerning the spatial distribution of my laser rays.</div>
<div class="">The laser is supposed to come from the top with no angle<br class="">
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<div class="">and hit the target at z = 400 microns with a gaussian spatial profile<br class="">
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<div class="">I(r) = exp (-(r/R)^gamma) where gamma = 4.</div>
<div class="">The rest of the domain is a 100 microns low density vacuum at the top.<br class="">
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<div class="">Unfortunately the centre of the gaussian is not in r = 0. Why so?<br class="">
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<div class="">I do not understand because I put the center of the gaussian to<br class="">
</div>
<div class="">be ed gaussianCenterMajor_1 = 0. and ed_gaussiancenterMinor_1 = 0.</div>
<div class="">I am using 3Dto2D laser ray tracing.<br class="">
</div>
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<div class="">Here is attached my .par file and .log and a plot of the depo var + rays power.</div>
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<div class="">Thank you very much for any help on this,</div>
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<div class="">All the best,</div>
<div class=""><br class="">
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<div class="">Antoine</div>
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