Changeset 2051 for trunk/MagicSoft/Simulation/Detector/ReflectorII/Changelog

Timestamp:

04/30/03 18:22:48 (22 years ago)

Author:

moralejo

Message:

*** empty log message ***

File:

• trunk/MagicSoft/Simulation/Detector/ReflectorII/Changelog (modified) (1 diff)

trunk/MagicSoft/Simulation/Detector/ReflectorII/Changelog

@@ -1 +1 @@
 ** Add changes at the beginning! **
+
+30/04/2003 A. Moralejo
+
+ph2cph.c: Found out that the fix from yesterday, although it "patched" the 
+loss of photons, did not remove the real cause for it. Actually in the 
+determination of the intersection of the photon with the paraboloid there
+was an overflow which resulted in nonsense coordinates beyond 10 m from 
+the mirror dish center. It has been fixed fixed by changing the following 
+cut:
+
+  if ( fabs(a) < 1.e-3 ) {
+    xcut[2] = -c / b
+  }
+
+which was formerly < 1.e-6.
+
+I also noticed that the problem from yesterday was not so serious: it only 
+removed a significant amount of the photons nearly paralel to the telescope
+axis, but globally, over a cer file there is no big difference.
 
 29/04/2003 A. Moralejo