October 10, 2007 online meeting minutes

present: Sergey Boyarinov, Elliott Wolin, Eugene Pasyuk, Benjamin Raydo, Nerses Gevorgyan, Nikolay Balasanyan, Tanest Chinwanawich, Serguei Pozdnyakov, Stepan Stepanyan

DVCS Trigger System

Following progress was made since meeting last week:

• datafile containing DVCS raw data was created by Rustam and Sergey and passed to Ben

• Ben made event display to present and control cluster reconstruction process using Altera simulation tools; it has two adjustable parameters: single channel threshold (the same for all channels, was set to 50) and minimum number of hits per cluster (was set to 3); cluster finding window has fixed size 3x3 towers (bigger or variable size winow requires more space in FPGA); future plan includes processing good file with different parameters, making 2DIM plots, getting efficiency, then processing all data and getting rejection

• we discussed how much regular user have to learn anout v1495 programming; it maybe good idea to learn Altera graphic tool which allows to assemble simple logic from prepared components

• we've got quotation for 2 more v895 discriminators from CAEN, they will be ordered

• we talked very preliminary about hodoscope, which will be located in front of DVCS calorimeter and have about 60 channels; v895's discriminators and v1495's logic units must be purchased for that device; it will be good to have hodoscope drawing in a couple of months, we may consider to add hodoscope outputs to the DVCS trigger system

• we'll try to borrow one more v1495 from Hall A for 2-board testing

Projects

• 2eSST test for v1190/v1290 started in the Hall, ec4 equiped with mvme6100

• new ET installed, everything looks good so far; et_2_et has new option direct for communication between machines which are not sharing any subnets

• old CAEN sy527 mainframes in LAC area are included into new EPICS (Sergey B., Nerses, Hovanes); some troubles communicating with v288 CAENET controller; will run for a while to get experience

TODO:

• HV in wolfram area need remote control (serial ?)

• include LAC into old EPICS GUIs

• ioc reboot/heartbeat buttons

• fix fan in mainframe 1 in LAC (Tom Carstens)

• send sy257 which just arrived fro repair back to repair (who is tracking them ?)

G9-FROST preparations

• CED for new TOFs

• online recsis (Eugene, Jerry)

• DC pulser run

• ADBs, level2 check (Chris)

• pedestal run (soft fixed) (netonpmc etc - automatically !!)

• TDC, TOF laser, EC calibration runs

• new SILO directory 'g9a'

• fix list of logbook receivers (run coordinator, PDL - what time periods ?): DAN PDL, Eugene run coord

• trigger: single sector TOFxST with and without Level2 (sector-based); norm trigger sync 1 only (grom g13_norm)

copy from g8b

• helicity correction: fix error around flip

• before and during the run we'll use G9-FROST page to store information related to the DAQ/Online systems

• new EPICS channels from target, list will come from Eugene; check existing list for availability, add new if necessary

fast and long injection

• run starts Oct 23 (commissioning for 6 days)