the fast shutter has a shutter lifetime of 10000 shots (VERY limited, not sufficient for even a single beamtime, and we are a few user groups who need it). the vuv-fel crew are working on a shutter with a longer lifetime.
the shutter is seen in the photo. on the top of the chamber, a dc motor controls a shutter made of graphite, which is mounted through the dark bellow on the top flange.
there are three commmands for the shutter, operated from the vuv-fel software doocs: closed, open and click, i.e. it opens for a single shot. for this beamtime we will work with a manual control of the fast shutter. the staff is afraid of the possibility that our labview program will make it too easy for us to shoot of the 10000 precious events.
now anton has programmed it so that if we want to take a ccd image
1) for a single shot:
a) close shutter in doocs
b) start exposure in labview
c) click shutter in doocs
d) exposure will close automatically (exposure time predefined in labview)
2) over many shots:
a) start exposure in labview
b) open shutter in doocs
c) exposure will close automatically (exposure time predefined in labview)
