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Disk chopper time-of-flight spectrometer IN5

IN5 is a high precision direct geometry Time-of-flight (ToF) spectrometer. It is used to study low-energy transfer processes as a function of momentum transfer (e.g. quasi-elastic scattering in solids, liquids, molecular crystals and inelastic scattering, etc ). Typically this instrument is used for measurements in the small energy (10 µeV - 100 meV) and momentum transfer region with values of about 1 % for the energy resolution .

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IN5 animation

To see the inner workings of the time-of-flight instrument IN5, have a look at the film. 




IN5 renaissance

Testing and commissioning of the new IN5 are over, and the first experiments have taken place at the beginning of October.

 


The picture shows the diffraction pattern achieved from a YIG crystalline powder after summing the energies. Each pixel, perpendicular to the plane of the panels, is coupled to an energy analysis by neutron time-of-flight. Our little brown man gives you an idea of the scale of the detector.

When the beam was turned on last July 7, every one of the 100,000 cells in the 384 position-sensitive detector tubes (a 30m2 collecting area - the surface of a small flat) reacted positively.

28/02/08

The final resting place!

On 27 February 2008, the Time-Of-Flight Chamber for the IN5 detector was placed in its final position!

It took less than 2 days to transfer the 3 parts of the chamber from the ILL2 building (where it had been under test since May 2007) to the ILL7 building. Over the next few days, several operations will be undertaken: sheets of cadmium will be stuck to the inner surfaces and the different parts of the TOFC will be bolted together. Then, the assembly on the stands will be vacuum tested in order to verify the tightness before proceeding with the final installation. This is a major milestone, which had to be achieved before mounting the background shielding, the oscillating rotating collimator and the detector units.

See Movie