BELLE ACC System: Cables, racks, etc.

Cables and Distribution

Floor Plan & Rack Layout

• Floor plan
• HVPS Rack
• Preamp LVPS Rack

Preamplifier Low Voltage Power Supplies

• Basic rack-mount unit (total of five required). (14 Kbyte ps).

• Distribution panel, mechanical details. (12 Kbyte ps).

• Distribution panel, schematic. (111 Kbyte ps).

High Voltage Power Supply Cables and Distribution

• BACC Cable Drawing

• EACC Cable Drawing

• The outputs of the LeCroy 1461 modules are SHV (and RG59 cable). The HV signals running to the FMPMTs use RG174 cable and a special multi-pin connector from Hirose. The "bridge" between these two types of connectors will be made using rack-mounted aluminum boxes from the Buckeye Stamping Company (we call these "Buckeye boxes"). This shown here. (12 Kbyte ps). Note that the SHV cables exit the LeCroy mainframe from the rear and attach to the rear of the Buckeye boxes via LeCroy/AMP LGH connectors. The Hirose cables that run to the FMPMTs in the detector connect to mating connectors on the front panels of the Buckeye boxes.

• A top view of the Buckeye boxes shows the way the connectors are arranged. Note that there are four Hirose connectors, each of which handles 13 HV signals. Thus each box handles two BACC sectors. The LGH connectors handle either six or seven HV lines each.

• An electrical schematic shows the connection between the rear-panel LGH connectors and the front-panel Hirose connectors. The circuitry is implemented on a very simple printed circuit board. Swaged terminals on the board can be used to bus together all of the HV lines on a single Hirose connector, making it possible to gang together the power supplies. This can easily be reversed at a later date.