Introduction
BEST
User’s Manual
12
Figure 3:
rear view of a
TetrAMM
unit
1.2
BEST
Central Unit overview
The
BEST
Central Unit is a 1U rack-mount system, which houses:
a dedicated hardware with next generation FPGA to perform all the critical
tasks as the system computation and correction calculations and
an industrial PC running Linux OS, which allows overall control and tuning
of the system using a GUI (Graphical User Interface) software.
A dedicated high speed hardware (integrated in the next generation FPGA logic) takes
care of all the critical tasks controlled by the PID algorithm, such as: stabilization,
intensity monitoring and positioning of the photon beam. The FPGA logic receives
the acquired X-ray data from all
TetrAMM
devices via a high speed SFP link.
The received data (i.e. current outputs from the phBPM) is elaborated to obtain beam
position and intensity information. The FPGA performs also the control PID
algorithms in an optimized way, adding a very low delay to the feedback loop in order
to guarantee the
BEST
correction performances over the highest possible frequency
spectrum. The computed corrections are sent to the actuator block (the
PreDAC
unit) using the SFP interface.
Ethernet and SFP
communication
interfaces
Power Switch
Power and
Configuration
LEDs
Trigger
connectors
Power
connector
Interlocks and
general
input/output
connector
Reset
button