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Pumping and pressure reading

Analysis chamber

Turbomolecular pump

controlled by DCU in the right experimental rack
   on/off
  or browse parameters
  together with edit parameter and confirm
  Parameters:
  001: heating on/off
  012  venting on/off
  002: standby (slow speed) on/off
  309: actual rotation speed
  329: magnetic bearing wear
  (manuals pump controller )
Automatic venting when at ½ of nominal speed.
For venting connect nitrogen gas line to the venting valve.
Water- and air-cooled. Water cooling is necessary for bake-out.


Scroll pump

has no switch. Disconnect/connect the mains cable (orange).
For short periods you can just close the valve on the line below the turbopump and leave the scroll pump on.
(manual )



Titanium sublimation pump

controlled by the bottom AML TSP2 controller In the left experimental rack.

off/continuous/degas/timed
(manuals pump controller )


Cryopump

under the X-ray source, around the titanium sublimation pump
Helps removing water vapours from the residual gas.
For refilling with LN2 connect a hose with funnel (inlet) and another hose (outlet)
Refill approx. every 30 minutes.
After use blow out LN2 and humidity using compressed air for several hours. During thawing there will be high peaks on the pressure in the chamber (10-6 mbar) so do not do it during measurements!
You might run some titanium sublimation pump cycles in order to help the pressure recover.


Rotary vane pump

for pumping of the Θ rotary feedthroughs of the manipulators
It must be vented after switching off!
For short periods you can just close the valve on the line and leave the pump on.
(manual )

Ionization gauge

controlled by MultiGauge controller in the left experimental rack.

on/off
change units: mbar, torr, Pa
The filament can burn at pressures above 10-4 mbar! Never switch on until the turbopump is at full speed and the cold-cathode gauge shows low pressure.
(manuals sensor controller )


Cold cathode gauge 1

controlled by MaxiGauge controller in the left experimental rack, channel 1
   switch channels
  long press for switch on
  long press for switch off
 
(manuals sensor controller )




Cold cathode gauge 2

controlled by MaxiGauge controller in the left beamline rack, sensor 6.

Sensor choose sensor
Sen-on/Sen-off switch sensor on/off
(manuals sensor controller )
This pressure can be read in Beamline Control System (BCS) and monitored by Pressure Watcher.


Pirani gauge

below the turbopump
Measuring the pressure in the roughing line (scroll pump)







  (manual )


Last Updated on Tuesday, 12 May 2020 09:57