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Plenarvortrag Fr., 14:00–14:25 F-PV9
Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II)
Jürgen Neuhaus 1
1 Forschungsneutronenquelle Heinz Maier-Leibnitz, TU München, D-85747 Garching
Starting in May 2005 the FRM II has conducted its first year of routine operation.
Right from the beginning a comprehensive number of beam tube instruments were
available for external users. These instruments are exclusively operated by external
collaboration groups from universities, Max-Planck institutes and large scale facilities.
From the available beam time 2/3 is distributed via a biannual proposal selection
procedure (http://user.frm2.tum.de). Access for European users is provided through
the NMI3 consortium in the FP6 frame work program.
Four different sources (cold, thermal, hot, fast) provide intense neutron beams via
10 horizontal beam tubes to the experimental and neutron guide hall. In addition,
the inclined beam tube SR11 serves as a high intensity positron source with a flux of
moderated positrons up to 5 × 10 8 e + /s.
Today 15 instruments are operational, two more will follow by the end of 2006. With
the installation of the Jülich Center of Neutron Science JCNS the suite of first generation
instruments at the FRM II will be completed especially for applications of SANS,
high resolution spectroscopy and reflectometry.
A major effort is put to improve the user service for sample environment, especially for
extreme conditions. Already available are cooling liquid free cryostats (top loader and
cooling head), high temperature furnaces (2000 ◦ C) and high magnetic fields (15 T at
50 mK on the cold three-axis spectrometer Panda). A cooling liquid free magnet up
to 7.5 T with flexible core (room temperature, 100 mm) is in the commissioning phase.
First high pressure experiments (Paris-Edinburgh cell) could be performed successfully.
Gas pressure cells are under construction. In house developments focus on the very low
temperature equipment in the mK range. First experiments with a 3 He cooling system
have been performed, the de-mixing chamber is in the commissioning phase.