Preparation for production phase Web – New web with HV pigtail qualified (?) – Installed on 2 views in Technical run Very little effect on noise; detector capacitance No crosstalk, feedback, etc effects observed – HV pigtail outgasing Just a temporary effect ? – Limited in time? – dirt ? Need to clean before installation Not a serious problem as installed on the gas output – HV testing continued by Johan (eventually help from Georgios)

Preparation for production phase Cover – Performance Time resolution, noise and offset behaviour not yet fully understood Measurement on sector prototype – More noisy then detector module in the pit Impossible to determine the noise from noise scans due to offset Noise from test pulse injection estimated to fC The sensitivity from test pulse measurement is VERY high Multiple hits – could be a serious problem Signal edge distribution – Times up to 250ns instead of ~120ns – Multiple edges ? – Internal CARIOCA crosstalk? Observed on previous cover – Verify also gas composition

Preparation for production phase Cover – Preproduction version FPGA obsolete, must be replaced – Version with serial link » Limited inputs for TDC – Version without link » Need to address link stability and reliability – Package choice limited due to PCB thickness (now 3mm) » Ratio between PCB thickness and via diameter Data connector (RJ45) – Bad mechanical and electrical performance » Check the possibility to replace with “rugged” RJ45 or even different standard » Some exists for 3mm PCB thickness, but difficult to find – Shielded version – Current connector category 3 (10Mbits/s), need cat 5-6

Preparation for production phase Cover – Preproduction version PCB layout fixes – Via on the mechanical structure (possible short) Adjust data extraction speed and memory sizes – Queuing simulations Modify TDC – The time of the first edge is reported in case of multiple hits in time window Depending on new FPGA choice – modify link code to improve length and reliability Add remote programming of EPROM/FPGA

Preparation for production phase SRB – Architecture verified at the test beam and Technical run – Re-run the system in the pit with latest fixes to demonstrate the functionality SRB – preproduction version – Decide on data output PC farm – Much easier code for data sorting and handling – Needs careful evaluation of necessary speed – Need to run the test with realistic dataflow TEL62 – Important effort for VHDL code, missing VHDL designer – Mezzanine for SRB connection – Decide on internal data transfer speed and memory – FPGA choice Related to cover

Preparation for production phase Services – LV PP Qualified Need to change the GND scheme Can start production soon – HV PP Finish tests with magnetic field Finish the protocol for relay control to conform to DCS code Write and test VHDL code for triplicated registers – Cables Prepare specifications (tables with lengths, connectors, etc) Organize ordering and assembly in collaboration with CERN service

Preparation for production phase Services – Power supplies LV+HV integral system not approved for POOL – Little interest from big experiments No CERN support for spares and reparations No CERN support for DCS We can continue with MPOD (Wiener) – Using our own GUI and scripts for control and monitoring – Thomas used GUI and SNMP – Price * Euro= ~13kEuro/station Other possibility is to replace MPOD with separated LV PS from Wiener (PL512) and HV from CAEN – Supported at CERN for reparation and DCS – But still need to buy spares ourselves – From CERN catalogue we need 1pc = 44kCHF/detector – Could not find suitable HV CAEN module (8x 2kV/2mA) but estimate 14kCHF (crate) +4x7kCHF(order of magnitude if exists) = 42kCHF/detector