From: Djamel Ouerdane (ouerdane@nbi.dk)
Date: Wed Dec 04 2002 - 12:02:28 EST
Hi all, Marco and I've just had quite a struggle with brag. He had a bug that looked odd at first glance. He sent hijing events through brag and applied some rotations in phi. The result was : as the rotation angle grew above a certain limit, output files were smaller and smaller in size. The last rotations had no useful data in it. So, I suspected it had to do with the rotang treatment. I dug into brag/src/user/guxint.F in the part dealing with oscar input. I realized by making several tests that when the phi angle of a particle, after a rotation was applied, ended up > 180 deg., brag would ignore it. This was especially true with Marco's phi range (-30 to 30 deg. only). The fix was to remove 360 deg. to particles with phi angles > 180 (so that they end up to the negative half of the full phi range). But I haven't committed anything. I ask the experts to make sure this is the right thing to do and if such fix should be applied to other nkine sections. Djam -- Djamel Ouerdane ------------------------------------------o | Niels Bohr Institute | Home: | | Blegdamsvej 17, DK-2100 Ø | Jagtvej 141 2D, | | Fax: +45 35 32 50 16 | DK-2200 Copenhagen N | | Tel: +45 35 32 52 69 | +45 35 86 19 74 | | http://www.nbi.dk/~ouerdane | | ouerdane@nbi.dk | o---------------------------------------------------------o
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