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also called triple Laue or LLL interferometer. The first crystal (beam splitter) splits the neutron beam coherently into two parts. The beams are redirected towards each other by the second crystal (mirror) ... paths can be controlled. Two exit beams emerge from the last crystal slab. They are denoted by "O" beam (forward direction) and "H" beam ...

insert of the cryomagnet into the beam. It is rotated so that a given set of crystal planes diffracts the beam. The detector is rotated and lifted towards the diffracted beam. The magnetisation distribution ... enter beam tube H4 and go to the polarising monochromator which diffracts only neutrons with a given wavelength and spin polarisation. The ...

mode, there is a beam distributor within the turbine housing, which guides the full UCN beam to just 1 of 3 beam ports at a time. The characteristics of the different beams are: The VCN beam is 7 cm high and ... velocity range from 0 to 15 m/s enlargement of the beam from 7 x 3.4 to 8 x 16 cm 2 and wide divergence UCN beam 230 rpm, receding speed ...

classical three axis spectrometry (TAS). The polychromatic beam from the thermal beam tube H13 arrives at the monochromator. The monochromatic diffracted beam is scattered by the sample, usually a single crystal ... material. The analyser measures the energy of the scattered beam. The scan shown here is an energy scan in which the energy of the ...

thermal neutron beam from the reactor is divided into two parallel beams, one for D2B, the other for D20. The D20 beam first reaches one of its four monochromators. The monochromatic beam leaves the mon ... cylinder of powder in a furnace or in a cryostat) which diffracts it in many directions. The diffracted beams are simultaneously counted by the ...

Neutron beam The neutron beam from the 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 -2 .s -1 .

the beam can be polarised simultaneously (i.e. select only the neutrons which have spins all in the same direction). The monochromatic beam is shaped by a set of slits and can be shut-off by a beam shutter ... n direction at will. The monochromatic polarised beam is then reflected by the sample. A second flipper and an analyser measure the change ...

orientation. The scattered beam, which may have a different wavelength from the incident beam, arrives on the analyser. To obtain the wavelength (or energy) of the scattered beam, a scan is performed by the ... scattering experiment. The polychromatic beam from the thermal neutron guide H24 arrives on the monochromator, which selects a given ...

of the beam paths contains a spin flipper which turns the incident spin up state into a spin down state. The exiting beams are a superposition of up and down state, each coming from a distinct beam path ... splits the neutrons coherently into two beam paths. The second blade acts as a mirror. The third blade superimposes the components from both ...

experiment The polychromatic neutron beam from the hot neutron beam tube H8 is diffracted by the monochromator, where a single wavelength is selected. The diffracted beam passes through a filter to remove ... remove the harmonics and then through slits to limit its aperture. This quasi-monochromatic beam is scattered by the sample: usually a gas, a ...