[Halld] RC week summary, Feb 13-20

[Wenliang Li]

Dear Collaborators,

I am happy to report we had a fantastic running week to complete the 
DIRC commissioning. According to Justin, we completed 95% of the 
commissioning objective. Initial DIRC performance was demonstrated and 
we collected data at variety of running parameters/conditions (MOROC 
threshold, HVs and beam intensities) to help understand this new 
detector. The DIRC readout (after firmware update) capability was also 
tested up to 900nA. The Hall is currently setting up for the CPP trigger 
study and PrimEx.

We lost 7-8 hours of beam time, it was caused by the following issues:

1. DAQ and DIRC readout.

2. iochdcol lost connectivity.

3. ROCs refuse to come online after reboot.

4. Configuration change and detector maintenance.

Thanks to the experts, rootspy/hdvew2 issues are being looked into, and 
the mysterious RF issued was finally identified.

To close up, I would like to draw attention to two rare issues we have 
encountered, interestingly, both happened about two years ago:

1. iochdcol lost connection. Symptom: MCC lost control to the Hall D 
Active Colimator and requested a physical reset. Both iochdcol and 
iochdmag are both beamline components and physically located in Hall D 
(MCC has no idea where they are located and refuse to reset them), 
therefore its difficult to assign responsibility. Currently, we donot 
get any alarm or heartbeat to these IOCs. MCC promised to looked into 
this problem and establish appropriate alarm (to us and them) to check 
IOC connectivity, and we will setup reset buttons for these IOCs in the 
counting house.

2. CSS unresponsive. Symptom: the all gluon machines will react slow for 
opening the CSS control window (5-10 mins to open one window). Once the 
window is opened, the functionality are normal. Apparently it was 
related to the issue from the JLab printing service server. We are the 
only hall who is sensitive to this problem. If it happens again, one 
need to contact the Jlab IT division and request them to look into the 
printing service servers.

Wish the success running of the PrimEx experiment,

Many thanks

Bill