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First deployment of VAT590 variable valve in LAMP. Jing Yin Govednik, Janez Maarten Thomas-Bosum 

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This was used with the Magnetic Bottle (MBES) iteration of the LAMP endstation..

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TMO requested this very-low flowrate leak valve for experiment gas delivery and vacuum level control in the IP1 chamber. 

The valve plate acts as a throttling element and varies the conductance of the valve opening.

Actuation is performed with a stepper motor and controller. The stepper motor/controller version ensures accurate pressure control due to exact gate positioning. The onboard controller and built-in PID loop were integrated into the control network of the LAMP vacuum PLC and IOC, and a custom PyDM GUI was developed as a user interface for this device.

In the future, this device will be integrated into the vacuum control systems of other endstations in TMO. Furthermore, work will be done to allow users to set and tune the PID loop parameters themselves, which are currently locked into the lower level CoE settings. This is because the control loop needs to be adjusted for chambers of different volume, gas flow rate etc.<To do: Fill in more Summary here>

Documentation page: LAMP MBES Variable Leak Valve Commissioning 3/22

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