1 New baseline for the magnet cooling system Yury Ivanyushenkov Engineering and Instrumentation Department, Rutherford Appleton Laboratory.

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Presentation transcript:

1 New baseline for the magnet cooling system Yury Ivanyushenkov Engineering and Instrumentation Department, Rutherford Appleton Laboratory

2 Liquid nitrogen cooling system: Conceptual points Magnet sub-cooling is eliminated -> no pumping on LN2 LN2 is pushed (by pressurizing the magnet) back onto the surface and disposed -> more robust solution compared to the previous concept of pushing LN2 back into the dewar Cold vent line -> heater is eliminated Valves are located in a valve box -> this ensures that valves are cold Filling and vent lines as well as a valve box can be tested independently from the magnet as a stand alone system.

3 Liquid nitrogen cooling system: Diagram Drawn by Peter Titus

4 Liquid nitrogen cooling system: Instrumentation and Control Instrumentation: Inside the magnet: Continuous liquid level sensors (vertical and horizontal) Discrete level sensors ( up to 10) Set of temperature sensors Outside the magnet: Temperature sensor on a cold line ? Control system: UNICOS (UNified Industrial Control System) vs. LabView -> LabView looks more affordable, accepted and portable BUT more careful consideration is required

5 Liquid nitrogen cooling system: Next steps To do list: Check whether the proposed base line fulfils all the requirements for the magnet cooling (are we missing anything?) Propose operation sequence ( as well as a logical diagram for control) Specify components (make calculation for the pressure drop in the lines etc.) Make a flow diagram and a layout for the system Specify instrumentation and a control system and select a platform (LabView ?) Specify safety system Check what equipment is available Get quotation for missing bits Make cost estimate for the system Make safety assessment Prepare a technical note on the cooling system including responsibilities and a schedule