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Methoden und Instrumentierung Poster: Mi., 14:00–16:30 M-P43
PANDA- cold neutron three-axes spectrometer at FRM-II
Peter Link 1 , Astrid Schneidewind 2 , Dirk Etzdorf 1 , Michael Loewenhaupt 2
1 Forschungsneutronenquelle Heinz Maier-Leibnitz, TU München – 2 Institut für
Festkörperphysik, TU Dresden
After a year of operation we report about the performance of the cold TAS - PANDA.
Emphasis will be laid on the specific instrument design properties, which make PANDA
to one of the most intense cold TAS world-wide. Using Gold foil activation combined
with a calibrated monitor we measured a flux of 1.9 · 10 7 n/cm 2 /s (ki=1.5 ˚A −1 , 180 mm
L-N2 cooled Be Filter) and 5.5 · 10 7 n/cm 2 /s (ki=2.662 ˚A −1 , 60 mm PG Filter) at
the sample position having the PG002 monochromator horizontally flat and vertically
focused. Data obtained during the commissioning time and about 20 user experiments
show that PANDA fulfills the expectations from the design studies. The experiments
profited of both the high flux and the flexibility of PANDA. High resolution studies in
the classical cold neutron TAS regime with kf