Minutes of the forward endcap EMC eZuce SRN meeting, 8th of May 2017, 14:00-15:00

Presence:

• Basel: Werner
• Bochum: Fritz-Herbert, Matthias, Tobias T.
• Bonn: Christoph
• Groningen: Myroslav
• Stockholm: -
• Uppsala: Pawel
• Giessen: Hans, Markus
• GSI: -

I²C bus cabling

• Christoph: Plans to use Bedea cable for I²C bus. Problem: How to solder? Hans: A tool to fix the wires to support soldering is in development at Giessen.
• Alternative solution is to use differential non-shielded cables. The noise on the analog parts is being questioned.
• Places are needed within the endcap to put the network adapters.
• The serial adapter prototype ASIC works. It is planned to put it on a PCB in an open package and bond it. There will be 4-5 chips put into a package and bonded at Bonn.
• Money for the ASIC is in the BMBF application, but it is unclear when it will be available.

Recovery LED cabling

• For the recovery LED cables it was decided to put a 2.54 mm pitch connector on the PCB. (VPTT alveoli).

HV system

• Paper work to export the HV modules/crates from Basel to Germany is being prepared (with FAIR). The HV should be delivered to Bochum.

SADCs crates

• Cooling tests are to be done at KVI-CART before the PANDA meeting.
• For the backplane design Pawel needs more input: Type of cable connectors, cable routing, space and number of SADCs etc..
• The power supplies will be designed by Pawel. Questions arise about the radiation hardness of to be tested at KVI? The high current design is not simple. Possibility to provide 6 separate power supplies using the MVD rad hard DC/DC converters. But this is not much easier.

SADC status

• Pawel: A 250 MHZ version is shipped for Giessen/BESIII.
• There is an open position for an engineer to program the SADC test station.
• 1 SADC unit for tests shipped today to Uppsala. In 3 month a decision is to be taken, if this unit is ok . Then 50 more will be produced in September. Last SADC modules are delivered in March 2018.

Concentrator status

• Pawel is looking at different parts. Once an inventory is done Myroslav will call for a meeting to collect the design requirements from other PANDA subsystems.

APD status

• There is a discussion ongoing between Markus and Andrea concerning the irradiation setup/procedure. To start the irradiation the reference grid can be put in one of the existing positions. Currently there are no APDs at Giessen, which are to be irradiated.