[Halld-cal] cosmic-ray run last night, long readout window

[Elton Smith]

HI Tegan,

We took some cosmic-ray data last night (see 
https://logbooks.jlab.org/entry/3342422) with the readout window of 511 
sample (2 micros). The data were taken in mode 8, which seemed to run 
without crashing for about 14M events.

This should be sufficient to take a look at Michel electrons from muon 
decays and verify that it makes sense. You might want to start thinking 
about how to isolate stopping muons and identifying the decay electron. 
By scanning some events, I see maybe a few percent that look like they 
may be stopping inside the BCAL. If you have a chance to look at the run 
and have any feedback, let me know in case changes need to be made 
before we take more data.

Thanks, Elton.

-- 
Elton Smith
Jefferson Lab MS 12H3
12000 Jefferson Ave STE 4
Newport News, VA 23606
(757) 269-7625
(757) 269-6331 fax