[Hallc_sidis_analysis] HMS gas cherenkov counter

[Brad Sawatzky]

0.5 atm of C4F8O should have pion threshold of around 3.8 or 3.9 GeV/c,
I think.

-- Brad

On Wed, 11 Dec 2019, bosted at jlab.org wrote:

> Hi all,
>    In case you didn't see this, here is a nice review of Cherenkov counters:
> https://www.jlab.org/indico/event/296/session/11/contribution/11/material/slides/0.pdf
>    So the HMS should have 0.5 atm of C4Fsomething. I didn't see the pion
> threshold mentioned. Brad, can you give us the number?
> I imagine that it is aobut 5.2 GeV.
>    Of particular note: one HMS mirror was broken until it was fixed in
> summer 2018. I use a cut dp/p > -5% for runs in Spring18 to keep an
> efficiency >98%.
>    Peter
> p.s. Sorry I left the meeting early: my computer crashed.  If anyone is
> interested in using my "fiducial acceptance" regions for each
> spectrometer, let me know. But maybe just as a starting point: you may
> want to make your own. I know I should make a writeup, but I am swamped
> with music gigs at the moment and won't be doing much physics until after
> Jan. 5.
> 
> > Hi All,
> > We will have the regular SIDIS analysis meeting tomorrow (Wednesday) at
> > Noon EDT.
> > For those at JLab Room F227 has been reserved.
> >
> > The Meeting URL is
> > https://bluejeans.com/648672553/
> >
> >
> > Please plan on showing a few slides on your work and please upload the
> > slides to the SIDIS elog at:
> > https://hallcweb.jlab.org/elogs/SIDIS+Pt+and+CSV+Experiments+Analysis/
> > <https://hallcweb.jlab.org/wiki/index.php/SIDIS#Weekly_Meetings>
> >
> > Cheers
> > Dipangkar
> > _______________________________________________
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> > Hallc_sidis_analysis at jlab.org
> > https://mailman.jlab.org/mailman/listinfo/hallc_sidis_analysis
> >
> 
> 
>