1. S A Griffiths Target Review Jan 2009 Target Electrical / Control Schematic HexBridge Power electronics Interface PSU Capacitor Bank Local Control Interface Sheffield Electronics Controller Rack MICE LCR Motor Drive System ISIS Accelerator DL Power electronics MICE Ethernet Fibre Optic Control Pulses MotorEncoder Limit switches Chiller Actuator Current Drive Pulses Fibre Optic Monitor Pulses ISIS Cooling System Water Flow s/w Level s/w K Type thermocouples Water Flow meter K Type thermocouples Coil over-temp

2. S A Griffiths Target Review Jan 2009 Additional Capacitor Bank + - Power Supply Water cooled container Actuator Hex BridgeCap Bank 220V + - Power Supply Water cooled container Actuator Hex Bridge Cap Bank 110V + - Power Supply 110V Voltage to Earth reduced Case earthed Existing System Proposed System

3. S A Griffiths Target Review Jan 2009 Tasks Identified Check operating performance of installed power electronics (Hex bridge, cap bank, power supply and interface) Install k type thermocouples on chiller water pipes to measure differential – during shutdown. Update control software to enable additional monitoring / interlocks from chiller. Service motion control system to ensure reliable operation. Manufacture a second capacitor bank with floating output and order power supply – once tests complete. Ensure off-line control / power electronics systems are ready for operations when new actuator available. Review power electronics protection circuitry and optimise.