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PHELIX is controlled by use of the PCS. This serves when PHELIX is aligned as well
as to control the sequence of a high energy laser shot. Due to safety reasons, nobody can
stay next to the laser while shooting, thus the laser must work completely remotely controlled.
Important settings and diagnostic data are stored after each shot by the PCS.
GUI of the "Sequencer" which controls the shot sequence of PHELIX
The PCS bases on the Control System Framework
(CS)
developed at GSI and used by about 15 groups worldwide. Described in key words the system
uses the object oriented approach, is scalable, distributed, event driven and free available
(GNU Public License). Programming language is LabVIEW™.
With the PCS about 30 cameras, more than 50 motors, five power
meter, about 30 end-switch controlled elements (these can be flipped into and out of the beam
line), five gate and delay generators (see
PTS),
and many other things are controlled. Furthermore, charging and discharging of the capacitor
banks (all together 15 power supplies, relays, ... ) used to flash the lambs of the pre-amplifier
and main amplifier laser heads are controlled. Additionally, cooling water circuits and the
pressure of several vacuum vessels are read out.
"Beamline"-GUI: The state of each subsystem is indicated, elements can be switched easily
The PCS guarantees the safe operation of the laser. For this purpose several reading points are used to check the conditions. If a failure is detected the laser is automatically set to a safe state.
Overview of the PCS system parameters:
| ● nodes (personal computers): |
about 20 |
| ● process variables: |
about 10000 |
| ● PHELIX specific class libraries: |
about 60 |
| ● instantiated objects: |
about 300 |
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![[at]](/onTEAM/grafik/at1314t.png)
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