January 21, 2009 online meeting minutes

present: Sergey Boyarinov, Sergey Pozdnyakov, Nerses Gevorgyan

1. Current run status

HV system

• in CLAS everything works for now

• there are good spare boards: 1461N - 9 boards, 1461P - 2 boards

• SY527 with old CAENET controller: repair ??? waiting for instructions from CAEN

• there is no good spare Lecroy mainframes; 2 in repair since November 2008, 1 from July 2008, waiting for status; 3 in Counting House, repair needed, RMA under way;

there is one Lecroy mainframe (temporary rack in EC), can be replaced with sy1527 (from Yuri ?) so we'll have 1 spare mainframe and 8 1461N boards, will do it after the run (tomorrow); need to register hvec2 IP name

• two SY1527LC mainframes with 'full crate' problem (when crate is full, first board shuts off and sometimes disapeares) have to be repaired in CAEN, will send them one by one starting from ECHV2 where TCP/IP is broken as well

• waiting for answer from CAEN about other SY1527/SY1527LC, if they have the same problem

• multi-pin HV connectors must be improved, need to ask manufacturer if glue can be used or some other solution can be recommended; Sergey P. will contact company; connectors must be improved, otherwise it will be a big problem for the CLAS and CLAS12

• will be good to modify medm gui generating process to have geographic addressing information in gui (alarm gui and probably main gui)

• 1520 boards (used in IC): 4 in CLAS, 2 channels are bad in 2 boards, one spare channel; 2 boards in test setup: one board is good, one has channel 8 dead (must goto repair if we have more then 1 month downtime, probably in March); may buy one more when have a money

Discriminators

• 3 v895B boards in counting house: one just from repair and working, one has unstable width and will be send to CAEN, one has 2 channels with min threshold 600mV and 45mV (must be from 5mV to 50mV); about 7 boards in CLAS has similar threshold problem, Sergey P. will ask CAEN if we can fix them onsite

• will not buy new boards, will ask Chris to build boards onsite

2. Next run

• Target labview setup: meet with Chris

• DCHV EPICS debugging

• ask Chris if he can replace some FASTBUS power supplies

• will try to migrate classc5 and probably classc12 to EPICS 3.14