Minutes of the forward endcap EMC eZuce SRN meeting, 8th of May 2017, 14:00-15:00
Bochum: Fritz-Herbert, Matthias, Tobias T.
Giessen: Hans, Markus
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).
Paper work to export the HV modules/crates from Basel to Germany is being prepared (with FAIR). The HV should be delivered to Bochum.
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.
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.
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.
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.