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space focussing of neutrons scattered by the sample in a very large solid angle, which are all then recorded with a relatively small single counter (a He3 gas detector). The focussing reflecting surface of ... optimised in a way such that all three corresponding contributions to the energy resolution are equal. It is important that the requested ...

position sensitive detector (PSD) mounted inside a vacuum time-of-flight chamber 4m from the sample. PSDs cover a large gapless detection surface (30m2) with a spatial resolution comparable to triple-axis ... . 620 K Instrument description IN5 is a general purpose direct geometry Time of Flight (ToF) spectrometer. It is used to study low-energy ...

combine a high resolution gamma-ray spectroscopy together with a large acceptance recoil spectrometer based on a gas-filled magnet (GFM) device. Such a device will allow the identification of a given fragment ... H22 guide is collimated to a halo-free pencil beam of 1.5cm diameter. The neutron beam intensity at the target position is of 10 8 n.cm ...

high resolution and a wide dynamic range of measured scattering vector, q . Description The instrument offers both ‘monochromatic’ and ‘time-of-flight’ (TOF) mode. Monochromatic mode: a velocity selector ... selector and flexible system of inter-collimation apertures defines the neutron beam. TOF mode: a chopper system allows an enhanced dynamic q ...

realised by a double chopper system with variable phase. The useful wavelength range is from 2-30 Å; the upper limit set by a frame overlap mirror. In the case of the polarised TOF mode a wavelength range ... range of 4-20 Å is polarised by a S-bender. For monochromatic operation, a fixed wavelength of 5.5 Å with a base resolution of 4% (FWHM) is ...

46 cm, 55 cm height) with a wide-angle thin aluminum exit window. The samples are usually contained in cylindrical vanadium cans. Vertical and horizontal slits allow defining a maximum illuminated cross-section ... cells covers therefore 8º in 2θ. Since there is a 7º gap between two detectors, at least 2 angular positions of the 9-detector ensemble ...

inpile collimation (channel A or B), the monochromator and the wavelength used. For mesurements carried out with an applied magnetic field, polarisation reversal is made with a cryoflipper for which the ... field independent. A pneumatic half-shutter system in front of the 5cm diameter single 3 He detector facilitates the determination of the exact ...

normally takes a few minutes, and recording of a full set of data a few days. If the crystal is studied as a function of temperature, pressure or other, the total measurement time is about a week. ... reactor in the world. The monochromator is a Cu crystal in transmission geometry using the (220) planes. The instrument is placed on a Tanzboden ...

control, since they are all obtained by a simple rotation within the Ge[hhl] plane. A large graphite filter can be switched in to provide a very clean beam at 2.4 Å, and a cold Be-filter can be used for longer ... diffractometer D2B is characterised by the very high take-off angle (135°) for the monochromator, which has a relatively large mosaic ...

analyzers provide a signal free of higher harmonic contamination when working with thermal neutrons (k f = 3Å -1 ). With cold neutrons the choice of k f = 1.4 Å -1 permits to access a window of energy transfers ... up to 1 meV while working with a Be-filter in the incident beam. The work at higher energy transfers with an unfiltered beam on IN14 ...