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Methoden und Instrumentierung Poster: Mi., 14:00–16:30 M-P42
Innovative upgrading of the SANS instrument D11 at the ILL
P. Lindner 1 , R. Schweins 1 , K. Lieutenant 1 , R. Gähler 1
1 Institut Laue-Langevin, 6, rue Jules Horowitz, F-38042 Grenoble CEDEX 9, France
Significant flux gains of 40 % - 140 % can be obtained at D11 for the whole range of collimation
distances with a new guide design, recently confirmed by MC simulations [1].
The 39 metres of straight glass guides with constant cross section 30 x 50 mm (width
x height) will be replaced with a guide system with a diverging section, widening the
guide width over the first metres by about 50 % and a focusing section over the last few
metres. The changes are going to be realised in the period 2007-2008 and in conjunction
with the ongoing Millennium Project “New Detector Tank” which concerns the
development of a larger and faster SANS detector for D11 [2]. The new detector will
be installed in a new detector tank with increased diameter and length, thus increasing
the dynamic range and the resolution by 100 % each, allowing for about 6 times higher
count-rates than at present and extending the range of momentum transfer Q both to
higher Q as well as to lower Q, including the option of installing a multi-beam USANS.
[1] K. Lieutenant, P. Lindner, R. Gähler (2006) manuscript in preparation
[2] P. Lindner R. Schweins (2006) ILL Technical Report ILL06 LI 02T