OWG Meeting 28-Apr-2010

Agenda

• Announcements
• Review of minutes from 31-Mar-2010 meeting
• Collaboration meeting agenda - Elliott
• RootSpy update - Dave L
• Trigger test stand - Alex S
• EVIO and Jevio improvements - Elliott
• DANAEVIO and EVIO to DANA - Elliott, Dave L
• Coil test update - Elliott, Yi
• Other electronics and trigger status reports - Fernando, Chris, Ben, Ed, Alex, Dave, William, Bryan

Time/Location

1:30 PM Wed 28-Apr-2010 CC F326

Announcements

• Dave Heddle's CNU student will arrive in the next week or so to work on the Hall D event display. His office is on the 3rd floor, near our offices.
• A new engineer just got hired into the Electronics group. Another position is open.
• The CLAS12 software workshop will be held in U. of Richmond in late May. David L (JANA) and Elliott (code sharing and EVIO) will be speaking. The main focus of the workshop is offline software.
• Chris ordered a new NIM crate for us, to replace the one that died.

Next Meeting

Note: the next meeting is four weeks from today due to JLab RunAround and collaboration meeting

1:30 PM Wed 26-May-2010 CC F326

Minutes

Attendees: Elliott W, Beni Z, Simon T, Mark I, Chris C, Dave A, David L, Vardan G, Carl T, Alex S, Yi Q, Bryan M.

Collaboration meeting online agenda

See link above. Everyone was happy with the agenda, although details still need to be worked out (time allottments, who actually will make the presentations, etc).

RootSpy

Dave L presented recent work done by him and a high school student (James Codega). See his talk for many details.

• RootSpy lib is independent of JANA/DANA framework, and can be used with any Root-based program.
• SSH tunneling worked fine with latest cMsg version.
• Tested with multiple nodes (14), multiple operating systems, different architectures, different subnets, through firewalls, etc.
• Current system is completely asynchronous in that hist servers send hists to display server when they feel like it.
• Display updates automatically when new hists arrive.
• Need to add facility whereby users can specify cuts that are delivered to hist servers, who then apply cuts to in-memory tree and return resulting hist.
• Immediate uses might be for FDC test setup (Beni) and tracking code development (Simon).

Trigger Test Stand

Chris reported on steady progress in hardware and software development in preparation for commissioning of the full complement of trigger hardware. Alex will talk about this at the collaboration meeting.

EVIO, Jevio DANAEVIO, EVIODANA

Elliott reported that work on the EVIO and Jevio packages is complete except for a few auxiliary utilities not needed at the moment. Some testing remains for the Jevio package. DANAEVIO is 99% complete and awaits a new JANA/DANA release for final testing. No work has been done on EVIO to DANA conversion since Dave is very busy with more important thing (but he said it should be completed this summer).

Electronics

• Chris reported that the big VXS/VME crate order is in preparation. It involves staged delivery, and the first articles expected in 1 to 1 1/2 years. This should satisfy any needs we have for crates then.
• First prototype Hall B discriminators arrived, two reserved for Hall D. We can have them now. About $2k for 16 channels.

HMI Programming for Coil Test

Yi reported that he is running the Allen-Bradley HMI software, has read and displayed PLC data, and just figured out how to archive data to disk. Note that the packages uses an external SQL database for storage. He currently uses a Microsoft database, but can easily switch to MySQL or something else if needed. Nest step is to get all the tag names from the PLC programmer and decide how and what should be displayed and archived.

Trigger Workshop

Chris reported that there will be another trigger workshop at CNU this summer, 8-Jul, same place as the one last year. Agenda being developed.

Coil Test

Elliott reported on rapid progress in the coil test now that much more manpower is available. The test area was cleaned and installation of test infrastructure components has begun. The technicians are busily wiring up the controls racks in F117 (many 1000's of connections needed!). A few parts still on order or remain to be ordered. Our PLC programmer is programming at a fast clip. So far we seem to be on schedule for going cold this summer.

SiPM Testing

Yi reported on radiation testing of Hammamatsu and SensL SiPM arrays in Hall A. Much more radiation was created than expected, so the power supplies and other instruments are now hot even though they were shielded to some extent. In both arrays the noise increased and signal decreased with radiation dose. Yi is working on determining the exact does experienced by the arrays, and will also let them cool down and see if they recover. Note that the radiation dose received is about 1000 times the expected lifetime dose in Hall D.