Re: missing events from hdgeant

[Richard Jones <richard.t.jones@uconn.edu>]

Mark,

Yes, that feature is enabled/disabled by the somewhat verbose 
compile-time switch

#define WRITE_ONLY_IF_SOMETHING_WAS_SEEN

in gout.F source file.  Just for fun sometime, you might do the command 
"grep '# *define' *.F and browse to see what other little-known 
behaviors are compile-time switchable in the code.

 From your particle gun command line below, I see that you have about 
10% of the pions going in the upstream direction outside the acceptance 
of any of the detectors.  For these events, there are no hits generated 
and so the default behavior is to not write them to the hddm output 
file.  In fact, wasn't this a feature you requested?  In any case, you 
can override the value in gout.F yourself, or perhaps better, I can move 
definitions like this into a central "steering" header file that 
contains all of these global-behavioristic defines in one place, that 
gets included into all of the source files.  You might want to bring 
this up with the offline group and see if there is a consensus on how 
these should be treated. 

-Richard Jones


Mark M. Ito wrote:
> Folks,
>
> With the following particle gun config line:
>
> c   particle  momentum  theta  phi  delta_momentum delta_theta delta_phi
> KINE   108      2.0       90.  0.      3.0              180.        360.
>
> I am missing about 10% of the event numbers in the hdgeant output 
> file, i. e., I only get 1824 of the 2000 requested triggers, i. e., 
> the first 10 events are:
>
>  <physicsEvent eventNo="2" runNo="9999">
>  <physicsEvent eventNo="3" runNo="9999">
>  <physicsEvent eventNo="4" runNo="9999">
>  <physicsEvent eventNo="5" runNo="9999">
>  <physicsEvent eventNo="6" runNo="9999">
>  <physicsEvent eventNo="7" runNo="9999">
>  <physicsEvent eventNo="8" runNo="9999">
>  <physicsEvent eventNo="9" runNo="9999">
>  <physicsEvent eventNo="10" runNo="9999">
>  <physicsEvent eventNo="11" runNo="9999">
>
> What happened to event #1?
>
> I remember something about a feature that explains this. How do I turn 
> off the feature? Is this documented somewhere? I would like to keep 
> track of statistics including events with no hits, etc.
>
>  -- Mark
>