1. 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)

2. 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 1-1.5 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

3. 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

4. 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

5. 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

6. 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

7. 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 4200+182+4*1331+3280 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 PL512/station @~11kCHF = 44kCHF/detector – Could not find suitable HV CAEN module (8x 2kV/2mA) but estimate 14kCHF (crate) +4x7kCHF(order of magnitude if exists) = 42kCHF/detector