here is a plot showing the reconstructed events in the left/right sectors.
--chris
Chris Crawford wrote:
> Here is an update on the wire chamber efficiency for the recent run
> 12690. There is one canvas for each sector, six columns for the six
> superlayers 0 to 5 from left to right, and three rows for layers 0 to 2
> from top to bottom. The bins in each histogram are cells in the given
> layer. The magenta curve is total hits expected from the tracks, red
> are the missed hits, and blue is the resulting efficiency.
>
> This plot can be generated in the blast acct with the following command
> after the run has been crunched:
>
> $ wc_eff 12690 -n 250000
>
> The results should be quite independent of tracking, since a miss is
> only counted if the track went through the cell, and if there were no
> raw hits (CODA) nearby in the same layer, regardless of whether they
> made it into the reconstructed track.
>
> The good news is that almost all of the wires are 98-100% efficient.
> However there is a box in forward cells 5-9 in the right sector outmost
> superlayer which is about 80% efficient. Also a box in the left sector,
> middle chamber, and one in the inner chamber (far forward). These two
> regions in the left sector affect the same forward tracks, and I worry
> this is pushing the partial stub capabilites of reconstruction. As,
> well, there are about 7 other very inefficient wires, mostly in the left
> sector.
>
> --chris
>
> ------------------------------------------------------------------------
>
>
> ------------------------------------------------------------------------
>
This archive was generated by hypermail 2.1.2 : Mon Feb 24 2014 - 14:07:32 EST