Speaker
Description
Summary
The CMS hadron calorimeter detector control system provides 40.08 MHz LHC clock to the front end electronics as well as supplying synchronization signals and I2C communication between front end modules and the central DAQ software. The next generation front end controller (ngFEC) is a microTCA crate positioned in the CMS underground service cavern. A microTCA crate controller hub (MCH) and an AMC13 board sit on central slots of the ngFEC crate while the other AMC slots are occupied by the CERN-developed Gigabit Link Interface Boards (GLIB), enhanced with custom firmware. Pedestals and diagnostic bits are controlled, and temperatures and voltages are read out. SiPM temperatures are actively stabilized by temperature readback and generation of correction voltages to drive the Peltier regulation system. The on-detector controller, the ngCCM, eliminates single-point failures and improves performance compared to the current system. Bidirectional communication and clock distribution with the ngCCM is via ngFEC GLIB. Each of the GLIB cards will be able to control 4 ngCCMs. Overall control and interfacing to databases and experimental DAQ software is provided by the software CCM Server. We report on design and development status, and implementation schedule of this system.
