[Hps-analysis] Drastic difference between 7487 and 7807.

[Valery Kubarovsky]

Hi All:
Please take a look to runs 7807 (3/7/2016) and 7487 (2/21/2016).
The trigger is almost the same, the current 200 nA.
It looks like the number of reconstructed tracks is almost factor of 5 higher the last weekend than two weeks ago. Can somebody tell me what is the reason?
Thanks,
Valery


----- Original Message -----
> From: "Bradley T Yale" <btu29 at wildcats.unh.edu>
> To: "hps-software at SLAC.STANFORD.EDU" <hps-software at slac.stanford.edu>, "hps-analysis at jlab.org" <hps-analysis at JLAB.ORG>,
> "Sebouh Paul" <sebouh.paul at gmail.com>
> Sent: Thursday, March 10, 2016 7:06:17 PM
> Subject: Too few Pass6 Moller events in MC

> I know this was supposed to be the "final pass",
> 
> but it looks like there are far too few Moller events being readout in Pass 6
> Monte Carlo.
> 
> 
> Looking further into this, it is because the >3-hit clusters in Pass 6 are
> getting decimated BEFORE the trigger for some reason (see attached plots), and
> so they no longer pass the cluster hit count threshold. These were made using
> exactly the same filtered SLIC events, and the same steering file with the same
> apparent thresholds in the GTP clusterer and trigger.
> 
> The difference must be elsewhere in the drivers themselves.
> 
> 
> These plots compare
> 
> hps-distribution-3.5-20151218.205540-15-bin.jar
> 
> with
> 
> hps-distribution-3.6-bin.jar
> 
> 
> both using the 'EngineeringRun2015TrigSingles1_Pass2.lcsim' steering file.
> 
> 
> A more recent 3.5 jar (1/25/2016) gives a similar number of events as Pass 4,
> and so the key difference must be with 3.6.
> 
> 
> -Brad
> 
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