[Halld-pid-upgrade] No DIRC meeting this week

[Shepherd, Matthew]

Hi all,

I would like to commend Justin and the whole team working on analysis of the DIRC commissioning data as well as those like Ben, Sasha, and others who made crucial contributions to enable testing at high rate.  Preliminary indications are that the commissioning overall was successful.  Given what I observed from the counting room last week, I can also verify there was not much sleeping.  

Matt

(It sure was a relief to see those plots with the Cherenkov rings from light that bounced off the far end of the bar.)

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Matthew Shepherd, Professor
Department of Physics, Indiana University, Swain West 265
727 East Third Street, Bloomington, IN 47405

Office Phone:  +1 812 856 5808

> On Feb 19, 2019, at 11:49 AM, Justin Stevens <jrsteven at jlab.org> wrote:
> 
> Given the ongoing commissioning and collaboration meeting this week, I suggest we cancel today’s DIRC meeting.
> 
> Over the last ~10 days we’ve identified and addressed a firmware issue, which allowed us to collect data under close to the High Intensity conditions we expect for GlueX-II (5e7 photons/s in the coherent peak).  A detailed list of the datasets collected at different intensities and threshold settings can be found at https://halldweb.jlab.org/wiki/index.php/Spring_2019_DIRC_Commissioning#Production_datasets.  
> 
> In total we will collect ~10 billion triggers with DIRC included in the readout during this commissioning period, which should allow us to address our commissioning goals, some of which have already been posted in the logbook and shown at RC meetings.  
> 
> Initial calibrations are in place and a production of REST files with the recent data is currently underway.  More to follow after we wrap-up our commissioning beamtime and at our next meeting on March 5th (after some of us have caught up on sleep).
> 
> -Justin
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