DO NOT ATTEMPT THIS UNLESS YOU DID IT BEFORE WITH EXPERT HELP - eg.
Reinhard Beck or Juergen Ahrens.

To evacuate the tagger, there are two pumping-devices available. One of them
is
located between the last beamline valve, named {\sf SFA2PLVE09} and the
box with the radiators in it, the other one is located at the end of the
tagger-ladder, near to the concrete-wall. To switch on the pumps, you have
to follow the following plan:

Close the big shutter-valve by turning its handle clockwise, if it is
not yet closed.
Switch on the prepump, called {\em Vorpumpe}, by pressing the
on-button labeled {\sf V}.

Slowly open the shutter-valve, by turning its handle counter
clockwise.

Switch on the Penning-Tubes or other pressure guages that are
installed and wait until the vacuum is below $10^{-2}$~Torr.

Switch on the Turbopump by pressing the on-button labeled {\sf T}.

Watch it driving up on its powersupply. Normally, you should also hear
a whistling sound with increasing frequency.

Do this for both pumping-devices. On the pumping-device near to the
beamline-valve, there is an amperemeter. Switch it on and check if the
needle is below the red line-marker. Use the range of 100$\,\mu$A, that is
marked with a black penline. You are not allowed to open the beamline-valve
before the black needle is below the red line-marker.

The pumping process can take some hours. At least sometimes one day. So, the
vacuum-pumping on the tagger has to be started very early.

At the end of the beamtime, if you want  to switch off the pumping-devices,
proceed as follows(if you are uncertain leave it to an expert!):

Close the shutter-valve by turning its handle clockwise.

switch off the turbopump by pressing the red button below the button
labeled {\sf T}.

switch off the prepump by pressing the red button below the button
labeled {\sf V}.

You could now flood carefully the turbopump with air, which is still
on speed by opening the small bypass-valve of it. But better keep your
hands off, if nobody ever showed it to you.

Never forget to keep the shutter-valve closed, when switching
on/off the prepumps, or oil could contaminate the tagger interior.