From ae90fe0e0c47e39a803c453e565e0eebea2ecd65 Mon Sep 17 00:00:00 2001
From: tlatorre <tlatorre@uchicago.edu>
Date: Thu, 6 Sep 2018 10:13:52 -0500
Subject: introduce a minimum value for the scattering RMS theta0

---
 src/path.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'src/path.h')

diff --git a/src/path.h b/src/path.h
index 0c97f18..1e40061 100644
--- a/src/path.h
+++ b/src/path.h
@@ -3,6 +3,16 @@
 
 #include <gsl/gsl_spline.h>
 
+/* Minimum value for the scattering RMS `theta0`.
+ *
+ * This is a bit of a hack to correct for the fact that we assume the
+ * probability of a photon hitting a PMT is uniform across the face of a PMT.
+ * By introducing a minimum value for the scattering RMS we broaden the angular
+ * distribution such that it effectively averages across the face of a PMT.
+ *
+ * FIXME: Should do some tests to figure out what is the best value. */
+#define MIN_THETA0 0.01
+
 typedef double getKineticEnergyFunc(double x, double T0);
 
 typedef struct path {
-- 
cgit