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IMPS

A multi-analyser detector system for the thermal three-axis spectrometer IN8. It is intented for imaging the (Q,ω) space and offers substantial gains in count rate.

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IMPS

Contacts: Monica Jimenez-Ruiz <jimenez(at)ill.eu>, Paul Freeman <freeman(at)ill.eu>

Description

IMPS (Imaging MultiPlexed Spectrometer) is a multi-analyser detector system for the thermal TAS IN8.

It is intended for imaging the (Q,ω) space. Its design makes it compatible with the classical TAS configuration.

Its strong points are :

  • Gain in instrumental flexibility
  • Gain in count rate of factor 2-3
IMPS installed on IN8
Left to right: multidetector shielding, multi-analyser housing, sample table, primary spectrometer.
Multianalyser
Position sensitive detector

Instrument layout

The whole assembly with its shielding
1: protection of the position sensitive detector (PSD), 2: protection of the multi-blades analyser
The crystal-collimator assembly
1: analysers, 2: crystal mechanics, 3: variable collimator system
The position sensitive detector