Re: event display

[Claude Petitjean <claude.petitjean@psi.ch>]

Dear Steven,

thanks very much for improving your event display! It's now very nice 
indeed,
and I tried it out successfully.

But now, i.o. to search for Alvarez muons, we need more specific criteria
than just looking for red spots, namely:

1) a pileup protected muon stop inside a fiducial tpc volume, which is away
from any walls.

2) a track separated from the muon stop track which starts with a red spot,
in a rectangular space spanning around the muon stop, typically +-20 anodes
(= +- 8 cm) and -5 to +20 usec(= -25 to + 100 pixels)  in drift direction.

The red spot comes from the 3He recoil of pmud fusion which has 200 keV
(I assume this is enough for a red spot).

If this is too difficult to program, we could start searching for red 
spots in a
rectangle +2 to +20 usec right of the muon stopping peak and +- 20 anodes
in beam direction.

In our 1999 mucap run, Peter has found a few such events, though it was in
regular hydrogen where we had 40 times more deuterium.

It is very important now to demonstrate that we are sensitive to Alvarez
muons, since we are now running at 5.45 kV with the tpc.

I hope you (or some one else) can help us in this important task.

With best regards

Claude


Steven Clayton wrote:

>Dear Claude,
>
>the boxes indicating the TPC fiducial volume were drawn only
>for good mu entrances: muSC*muPC1 and pileup protected.  I
>changed it to draw the boxes for every muSC hit.  I'll
>think about how to make it easier to switch between different
>triggers, but it may be a couple of days until I can implement
>this.
>
>regards,
>Steven
>  
>