[Hps-ecal] [Hps] HPS is taking data

[Nathan Baltzell]

Hi Everyone,

Following up on Takashi's email, for those who are ready to analyze the data now:

Tonight's data taking is 10nA on target with a very loose pairs trigger (basically just
~10 MeV crystal threshold) at a rate of few kHz along with a 1 kHz random pulser.
There is a log entry with some details here (and a run spreadsheet is being filled
in the counting house, to be posted):
https://logbooks.jlab.org/entry/3313255

See more recent logbook entries here:
https://logbooks.jlab.org/book/hblog

We are nominally doing 2-hour runs, and the runs are being copied to tape:
/mss/hallb/hps/data

And also to disk for easy access:
/cache/mss/hallb/hps/data
/volatile/hallb/hps/data/tgt

Let me know if you can't get to the data!

-Nathan




On Dec 12, 2014, at 8:39 PM, "Maruyama, Takashi" <tvm at slac.stanford.edu> wrote:

> 
> With heroic effort by Stepan, the anomalous source of background was identified and eliminated completely. 1.5 micron-thick Pt target was inserted. Attached is a ECal single rate map at 10 nA. This is very similar to what you see in Monte Carlo. 
> 
> Ben has setup a very loose two cluster trigger and Sergey's DAQ system is taking data at 4.5 kHz at 10 nA. This data will be used to find optimum cuts for pair trigger.
> 
> Takashi
> RC <fadc_firsttarget.png>_______________________________________________
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