[Olympus] ToF rates from Monte Carlo

[Michael Kohl]

Dear Axel,

this is a very nice study.

Regarding your solid angle variation argument, would it be possible to 
plot the overall theta vs phi for all accepted events, and also broken 
down by bar number?

Another source of systematics is the controversy about the target and/or 
the field map relative to the detectors. Each of the three could be off by
a constant delta_z ~= 130 mm. I'll send a separate note on this when I 
feel less confused.

I would not be surprised if that affects the solid angle by some ~20%. 
The simulated acceptance change between even (++,--) and odd (+-,-+) 
charge*polarity seems to be in agreement with the TOF analysis by the 
Yerevan group.


Both Alexander and I won't attend today's meeting while we are crossing 
the Atlantic.

Best regards
    Michael




On Sun, 29 Apr 2012, Axel Schmidt wrote:

> Dear all,
> 	After we had discussions at the recent collaboration meeting about the effect of the magnetic field on the expected rates in the ToFs, I went ahead and ran a simulation using the OLYMPUS Monte Carlo to address this topic.  I've written up the results, which I will attach, and also post to the wiki.  Please let me know if you have any comments, questions, or suggestions.  We can discuss any ideas at this week's Monday meeting.
> Best regards,
> Axel
>
> -------------- next part --------------
> A non-text attachment was scrubbed...
> Name: report.pdf
> Type: application/pdf
> Size: 135254 bytes
> Desc: not available
> Url : http://mailman.mit.edu/pipermail/olympus/attachments/20120429/184f7119/attachment.pdf
> _______________________________________________
> Olympus mailing list
> Olympus at mit.edu
> http://mailman.mit.edu/mailman/listinfo/olympus
>

+---------------------------------------------------------------------
| Dr. Michael Kohl, Assistant Professor and Staff Research Scientist
| Physics Department, Hampton University, Hampton, VA 23668
| Jefferson Lab, C117, 12000 Jefferson Avenue, Newport News, VA 23606
| Phone: +1-757-727-5153 (HU), +1-757-269-7343 (Jlab)
| Fax:   +1-757-728-6910 (HU), +1-757-269-7363 (Jlab)
| Email: kohlm at jlab.org
| Cell:  +1-757-256-5122 (USA)
|
| Deutsches Elektronen-Synchrotron DESY, Bd. 66, Rm. 6,
| Phone: +49-40-8998-6406, Cell: +49-171-101-1967
+---------------------------------------------------------------------