update cv, stm report

stm_study_201611/stm_study.tex

@@ -223,7 +223,7 @@ The uncertainty on the hit rate estimation is \SI{2.6}{\percent} if
 only statistical uncertainty of the hit counting in \cref{eqn:stm_hit_count} is
 taken into account. This hit rate is too high for a HPGe detector to function
 well, so an attenuator would be installed upstream of the spot-size collimator
-to lower the hit rate to about \SI{10}{\kHz}.
+to lower the hit rate to about \SI{50}{\kHz}.
 
 \subsection{Hit timing on STM detectors}
 \label{sub:timing_of_hits_on_stm_detectors}