hi, Michael, sorry it was too late about the epsk switch info. but a piece
of good new is the timing seems to be correct this time. Just looked at
some 6500-6600 runs lrd'ed overnight, proton mass peaks are recon'ed much
sharper than before and there are even some desernable mass peak at pion
mass. only thing is that for proton into right especially into paddle R14,
there is a small bump arround 400MeV in proton mass peak.
sorry again for the epsk mess up. but hopefully it won't be long before
Adrian can enjoy the recrunch too.
Chi
On Tue, 5 Oct 2004, Michael Kohl wrote:
> Hi Adrian and others,
>
> I am taking care of re-recrunching the recent hydrogen recrunch in order
> to get the timing (and proton mass recon) straight. The re-recrunch
> results will go into /scratch1/bud15/v3_4_1 and links will be established
> in /net/data/4/Analysis/data/v3_4_1.
>
> Regards,
>
> Michael
>
>
> On Tue, 5 Oct 2004, Adrian T Sindile wrote:
>
> > Hi!
> > I just took a quick look at the newly recrunched H2 data (April,
> > inbending) - recrunch was finished today, I believe. I am using the same
> > cuts I used before recrunch - first observation, I am getting 470K elastic
> > events compared to 514K events for the same range of runs, same cuts...
> >
> > In the first attached plot, I think the TOF hit distribution (for the
> > selected tracks) looks weird... doesn't it?
> > In the second plot, something is really bad about the reconstructed proton
> > mass... especially in the right sector...
> > The third plot might provide some explanation for this mess(?)... on the
> > top pictures, you would expect two gaussians (e-p coplanarity). On
> > the bottom pictures, the slope should be negative, from the same reason
> > (when an electron hits high a paddle on the left, the corresponding proton
> > should hit low another paddle on the right)...
> >
> > Maybe some definition changed in the reconstruction codes (a plus sign
> > becoming minus, for example)? Maybe somebody can comment on these plots?
> > Is everybody seeing what I am seeing?
> > Thanks!
> >
> > Adrian
> >
> > -------------------------------
> > Adrian Sindile
> > Research Assistant
> > Nuclear Physics Group
> > University of New Hampshire
> > phone: (603)862-1691
> > FAX: (603)862-2998
> > email: asindile@alberti.unh.edu
> > http://einstein.unh.edu/~adrian/
> >
>
> --
>
> +-------------------------------------+--------------------------+
> | Office: | Home: |
> |-------------------------------------|--------------------------|
> | Dr. Michael Kohl | Michael Kohl |
> | Laboratory for Nuclear Science | 5 Ibbetson Street |
> | MIT-Bates Linear Accelerator Center | Somerville, MA 02143 |
> | Middleton, MA 01949 | U.S.A. |
> | U.S.A. | |
> | - - - - - - - - - - - - | - - - - - - - - -|
> | Email: kohlm@mit.edu | K.Michael.Kohl@gmx.de |
> | Work: +1-617-253-9207 | Home: +1-617-629-3147 |
> | Fax: +1-617-253-9599 | Mobile: +1-978-580-4190 |
> | http://blast.lns.mit.edu | |
> +-------------------------------------+--------------------------+
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
This archive was generated by hypermail 2.1.2 : Mon Feb 24 2014 - 14:07:31 EST