With Spin Echo option (TASSE)

IN20 is a thermal beam three-axis spectrometer equipped for inelastic scattering experiments with 1D and 3D (CRYOPAD) polarisation analysis, and for excitation line-width studies using the thermal beam spin-echo technique (TASSE).

The short movies below where shot in 2002 during the experiment (4-01-530): "Neutron spin-echo study of phonon line-widths and energies in Ge and Si".
This is a typical experiment where adding the TASSE option on IN20 is invaluable. The neutron spin-echo technique dramatically improves the energy resolution  compared to the conventional TAS setup.

From back to foreground you can see :

- the monochromator housing of IN20,
- the primary superconducting coil vessel (TASSE),
- the sample cryostat (orange),
- the secondary superconducting coil vessel with its cryogenic device (TASSE),
- the analyser shielding,
- the neutron detector (lower right corner).

Click here to download the 320x240 MPEG-4 movie (file size: 220 kb)

©2002-2007, Institut Laue-Langevin, Grenoble, France

Emmanuel Farhi refilling the sample cryostat with helium-4.

Click here to download the 240x320 MPEG-4 movie (file size: 312 kb)

©2002-2007, Institut Laue-Langevin, Grenoble, France

English checked by: Ronen Ghosh, April 2007.
Updates: A.Filhol, 23 April 2007, 9 Sept 2009.