Post by leewh on Nov 1, 2018 20:06:39 GMT -5
Hi,
We had a Lake shore 625 for controlling the superconducting magnet up to 5T. Cooling by LHe was good and stable down to below 4.5K before we start to charge the it. It works fine up to 4T and when we ramp up from 4T to 5T, it works well initially until almost reaches 5T (to be exact 4.98T) FAULT alarms came ON "Magnet quench detected", however do do not see any rise in temp from the external temp monitor and we don't understand why it quench. It works fine in our previous run.
What or where is the controlling factor that Lake shore 625 detect quenching?
Thanks
We had a Lake shore 625 for controlling the superconducting magnet up to 5T. Cooling by LHe was good and stable down to below 4.5K before we start to charge the it. It works fine up to 4T and when we ramp up from 4T to 5T, it works well initially until almost reaches 5T (to be exact 4.98T) FAULT alarms came ON "Magnet quench detected", however do do not see any rise in temp from the external temp monitor and we don't understand why it quench. It works fine in our previous run.
What or where is the controlling factor that Lake shore 625 detect quenching?
Thanks
