9 independent turnable blades
Gain in counting rate
a factor 3
Variable collimator system
120 mm height
Definition of the outgoing beam
Position sensitive Detector
He filled tubes
54 tubes of Φ = 9 mm
539 x 200 mm2
Horizontal spatial resolution
High efficiency for thermal neutrons
normal one = 400-700mm
keep the conventional TAS configuration
The IMPS assembly comprises a multi-analyser made of 9 independent crystals, a computer controlled variable collimator and a position sensitive detector. It makes it possible of measuring in focused or imaging modes.
Its main characteristics are:
- possibility on working focused or imaging
- no mechanism on the beam
- mechanics completely amagnetic
IMPS being capable of focused, imaging or even mixed mode measuring geometries, its use would be quite complicated without a computer assistance. Thus the software vIMPS was developed which offers both a simulation and a display mode:
- simulation mode: one can modify all instrument parameters and then play with the measurement parameters by interactively moving either the Q,ki,kf triangles relativeto each analyser blade (reciprocal space) or the instrument parts (direct space).
- display mode: plot the spectrum, the Q,ki,kf triangles and the instrument configuration corresponding to a given data file.
The IMPS project was developed in collaboration with Spanish scientific partners, i.e. Ministerio de Educación y Ciencia (MEC).
First installation on IN8C, December 2006
First sample, June 2007