Gaseous N2 -196⁰C Vacuum Liquid N2 -196⁰C Radiation shields Outer wall cryogenic vessel (12mm Aluminum) Vacuum vessel (Stainless steel) Inner wall cryogenic vessel (15mm Aluminum)

Phase Separator CryoLink Legend exhaust cryogenic control valve TT07 exhaust CV01 Heater LT01 PT02 PT01 Safety valve DT01 DT02 LT03 LT02 Phase Separator CV02 TT06 TT03 Legend TT05 TT02 cryogenic control valve capacitive level sensor TT04 TT01 Pt100 temperature transmitter CryoLink pressure transmitter displacement transmitter (LVDT)

PID-loop Ph-Separ. Setpoint PID-loop CryoLink Setpoint Setpoint PID-loop Heater LT01 TT07 CV01 PT02 CV02 Phase Separator Liq N2 storage tank CryoLink

connector for C-type module RT-program boolean inputs numerical inputs boolean outputs numerical outputs cRIO Chassis+ RT-PC SW-defined Inputs/Outputs FPGA driver for C-modue C-type module C-type module C-type module C-type module C-type module Free slot: connector for C-type module C-type modules connected to FPGA

Expert User Interface RT-system Modbus Tango FPGA (not mandatory) network streams shared variables RT-system Modbus Tango read indicators write controls ‘pet’ watchdog logging FPGA sensors actuators

19” cabinet CryoLink controls Phase-separator 2x Press.Air P-Controller cRIO Controller CryoLink controls Control panel (Mains switch, overall status) 24V ok cRIO ok PhaseSeparator ok CryoLink ok 4A slow 24V power supply (19” mounting adapter) Nikhef - 2013 Blind panel 19” cabinet CryoLink controls

PhaseSep. & CryoLink input Expert User Interface FPGA RT- program Simulation? FPGA Simulation code input RT- program output Shared vars Simulation

‘Connect’ button Click to select CryoLink Controls system

State outgoing Interlocks ‘Connected?’ indicator State incoming Interlocks Name connected CryoLink Operational State Phase-Separator State outgoing Interlocks %Power & Temp Heater Conditions of logic for Level-control (enabled/disabled, running/not active) Go-to ‘Operation’/Bakeout Level- indicators Settings of the three PID-controllers (the Heater control on the other Tab) PT100 temp-sensors cryogenic vessel Operational State Phase-Separator

Logic for “Level control PID-controllers” PID-ctrl’s running? T (running) F (not running) Not running by error? PID-ctrl ‘Auto’? T F T F Level PID-ctrl disabled Level PID-ctrl switched off PID-control output (CV01, CV02) Manual control output (CV01, CV02) AND of Incoming Interlocks = False or RT-program error Reset required! Cmd <Go to Bakeout> = TRUE or Cmd <Stop liqN2 supply> = TRUE (running PID-controllers can individually be set to ‘Auto/Manual’) CV01, CV02 both closed (setting = 0%)