Minutes of the forward endcap EMC meeting, 3rd of April 2023, 14:00 - 15:10

SADC crates

• Pawel has submitted the new backplane for production. Will take not more than two months. Exact date not yet known.
• Power supplies for the SADCs will be sent to Bochum
• More SADCs ~30 will be sent to Bochum, eventually all are needed at Bochum.

Rack positions

• To produce low voltage cables, the rack positions at COSY will have to fixed. This will be done next week at COSY (Claudius, Christoph).
• We have two racks. Once DCS ist tested they will be shipped to COSY (in about 4-6 weeks).
• Size of the racks (width, depth, height)
  • Double rack: 110 cm x 60 cm x 160 cm (4 ISEG crates of which 1,5 are for VPTT, 2 Wiener PL512, ISEG for LP, uTCA for data concentrator)
  • Single rack: 80 cm x 83 cm x 202 cm (4 ISEG crates, of which 1,5 are for VPTT, 2 Wiener PL512)

Power cables

• Claudius will bring next week 6 mm² LV cable to COSY for Bonn (~300 m).
• Thin cables from each alveole will be combined to one 6 mm² cable.
• Two option: go directly with these cables to the Wiener LV or combine them via power bars at the edge of the endcap and continue with 32 mm² cable (available @Bonn).
• There will be about 3 * 40 6 mm² cables in total. The ones covering VPTTs are about 3*21. --> picture from Celina.

LP fibres

• shrinking tubes will be tested and prepared in Bochum
• Question: leave extral length of cables to dismount submodules or remove fibre plug in situ (complicated)

APD modules

• 6 APD modules to be mounted 2 rows in 3 columns at the bottom center below the VPTTs
• Tobias H. will check, what needs to repaired for the 6th module
• The HV boards for the APD modules can be controlled by CANbus ore serial interface.
  • solution for serial interface within EPICS available at Bonn
  • solution for CANbus to be checked with Tobias T.

Overview for mounting and cabling

• Meike will prepare a table with all connections and feed throughs for the
  • SADC signal cables
  • HV cables
  • LV preamp cables
  • light fibres * This table is needed for the DCS and may help during mounting

AOT

• Please put all your information on cabling, HV setting and so on into the nextcloud (if it is not in the data base)
• Next meeting in 2 weeks