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This walkthrough will help you to re-start the pumps in the molecular beam instrument at US4.

Normal pressures:

When power is out

  1. In case of a power outage contact Sjors at +31 6 23848434 or Sander at +31618875389

The setup should be filled with nitrogen

  1. If power is back up, the backing pumps should be running and the setup should be pre-pumped
  1. Check the MEMB pressure
  1. if MEMB pressure is several mbar, you can turn on the turbo pumps
  1. first turn on the big turbopump using the on/off button on the top right controller (DCU 600)
  1. then turn on the other turbo pumps using the two bottom controllers:

The pfeiffer pump (bottom left) can be turned on by simply pushing the on/off button The edwards pump (bottom right) can be turned on by


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