Yu. Guz 2015/02/18 1

ECAL and HCAL status

Yu. Guz 2015/02/18 2

ECAL maintenanceThere were 22 non operational cells at the A side, because of 3 dead CW. The access was desirable, and granted from 27-Jan.

Few dead cells at the C side were fixed too.

access

ECAL LEDs ECAL LEDs

Yu. Guz 2015/02/18 3

HCAL maintenanceThe access gave us a possibility to work also on HCAL:

fix one dead cell side A; in order to study the PMT degradation problem, modify magnetic shielding in a part of PMTs (66 pc, only new ones, installed in 2014)

the idea was to try to reproduce the ECAL situation in electrostatic configuration – isolate the PMT glass from ground

add insulator (plastic tape) between the steel and the µ-metal shieldsremove rubber O-rings which are slightly conductive

Need to re-run the 137Cs calibration before physics data taking

HCAL LEDs after the intervention

GND

O-rings(conductive)

µ-metal shieldcontacts to ground

GND

conductive O-ringsremoved

wrapped with plastic tapeno contact to gnd

Yu. Guz 2015/02/18 4

ECAL and HCAL DCSECAL

Both DAQ and HV are configured via the new SPECS (ecspecsa01 / ecspecsc01). works well, with both SpecsServer and CAT – a great success!!!Patrick and Clara continue debugging, to achieve perfection

HCALDAQ and HV work via old SPECS. the 137Cs source control and readout of integrators are migrated to linux (V. Kudryavtsev, BINP)

the hcdcs02 node (an old SuperMicro 1U box with old Specs master, running SLC6) is used for both sides. The SLC6 version of SPECS driver for old masters works fine (Patrick)two services are supposed to run on hcdcs02,

“IntSrvRO” for the readout of the PMT DC currents during data taking“CsSrv” for the source control and integrator readoutboth communicating via DIM (for control via DCS)only one of them can be active at a time.

integrated into DCS: the HCDCS project was created by Clara in Decembercontains panels for source control and status display no FSM for the moment (not supposed to be run by a shifter)both communicating via DIM

fully operational (the source run on 06/12/2014 was performed with this system)there is room for improvement of interface etc

in case of migration to new SPECS masters, the 137Cs control may require a dedicated SPECS node (to be tested).