on sunday night at 7pm, the möllers will have had their last photon for this time. (they will have beam again on the 10th of february, after our beamtime.) they will empty their chamber on sunday night, it will take a few hours. they want manpower from us, anyone volunteering? the möllers will then leave for a well-deserved rest in berlin on monday. christoph bostedt will leave his mobile on over the first few nights of beamtime(...).
we will try to put in things on sunday night, but most probably we will do the heavy work on monday day.
notes from the meeting:
-the HeNe (optical alignment laser) and the fel are VERY correlated.
-the gas monitor detectors (GMD, for fel intensity monitoring) work well, and so does -pointing stability is 50um.
-focus is 30um.
-when the fel works well, the 2nd harmonic at 16nm is about 1% of the total intensity. otherwise a bit less, but more than 0.1%.
-the attenuator (a gas cell), which gets stable on a 5 minutes basis. however, when the beam is attenuated down to promille, the GMD does not give feedback to the operators, and they have more problems maintaining good fel.
