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installation_fp_sci [2017/06/21 15:31]
pereira [Pumping focal-plane chamber]
installation_fp_sci [2017/06/22 11:58] (current)
pereira [Pumping focal-plane chamber]
Line 50: Line 50:
        * After the rough valve **I260RV** is automatically open, the mechanical pump will start pumping.        * After the rough valve **I260RV** is automatically open, the mechanical pump will start pumping.
        * The pressures in the mechanical pump (from **I259PG**) and beam chamber (from **I261PG**) will jump momentarily to very high values. They should go down slowly after few seconds (otherwise, the chamber is not properly closed).        * The pressures in the mechanical pump (from **I259PG**) and beam chamber (from **I261PG**) will jump momentarily to very high values. They should go down slowly after few seconds (otherwise, the chamber is not properly closed).
-       * When pressure in the chamber (from **I261PG**) gets below 100 mTorr, **I260RV** will close. Foreline valve **I260FV** will open followed by the turbo gate valve **I260GV**. +       * When pressure in the chamber (from **I261PG**) gets below 100 mTorr (at least 30 min), **I260RV** will close. Foreline valve **I260FV** will open followed by the turbo gate valve **I260GV**. 
-  * The pressures in the mechanical pump (from **I259PG**) and beam chamber (from **I261PG**) will jump momentarily to very high values. They should go down after few seconds +  * Wait for few hours until vacuum is good. You can then turn on the ion gauge **I264IG**
-  * Wait for some hours until vacuum is good+
  
  
installation_fp_sci.1498073462.txt.gz · Last modified: 2017/06/21 15:31 by pereira