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Instrument Data beam size at sample 40 x 10 mm 2 incident wavelength range 2 - 30 Å scattering plane vertical Figaro Time-of-flight 4 choppers Frame overlap mirrors [20Å] [30Å] white beam flux at sample ... sample ~10 8 n cm -2 s -1 angle undeflected beam 0.62˚ angles deflected beam -2.5˚ < θ < 3.8˚ (horizontal) constant wavelength resolution δλ/λ ...

% 0.4, 4 4.8 92.3 1.8 × 10 6 3.55 4.4 % 0.3, 2.5 5.7 116.3 0.8 × 10 6 2.51 3.7 % 0.2, 2.1 Maximum beam size at sample: 55 × 25 mm Technical Specifications Monochromator 3 × HOPG (002), each with vertical ... the cold neutron guide H15, monochromates the neutrons with wavelengths of 3.1 Å, 4.8, or 5.7 Å. The beam is polarized using a focusing, m = ...

interface cell. The neutron beam then transmits through the solid and the oil film to reflect at the oil/water interface. Careful determination of the attenuation of the neutron beam through the oil is required ... reflected beam y56 = 2.726 ;Wanted Theta (deg) y58 = -1. ;-1 for reflection down, +1 for reflection up ;load OSS pattern into w2 ...

to 26 % (depending on chopper pair & detector distance) Collimation 4 movable guide sections 2.5 m Beam nose 2.8 m Guide cross-section 30 x 30 mm Source-to-sample distances (m) 2.8, 5.3, 7.8, 10.3, 12.8 ... mode: a velocity selector and flexible system of inter-collimation apertures defines the neutron beam. TOF mode: a chopper system allows an ...

Guide hall, thermal beam H25 Monochromators In primary shielding: PG (002) vertical focussing in reflection Cu (200) flat in transmission In secondary shielding (for polarized neutrons): Heusler (111) ... to the right or to the left, with a maximum Bragg angle 2θB ≈ 130° on both sides; using a normal beam mode: the lifting detector is mounted in ...

cold source; the short rotor and high transmission of its velocity selector; the relatively large beam cross-section (55 x 40 mm). Wavelength selection A relatively narrow wavelength band (normally 10 ... of eight sections. Each section comprises three tubes, any one of which can be positioned on the beam axis. One tube contains a neutron guide of ...

serve a very limited number of applications. For reasons of intensity, a relatively large beam divergence, i.e. a beam cross-section larger than the sample size is accepted as well as wavelength resolutions ... pushing a button in the controlled area after checking the absence of any person before opening the beam. (04-Mar-2005) Instructions in ...

wavelength the monochromatic beam has its highest flux of about 9.8 x 107 n cm-2 s-1. Soller collimators allow reduction of the natural divergence (27') of the incident polychromatic beam down to α1 = 10' or 20' ... Reactor hall (ILL5), level C, thermal beam H11 Monochromators for lower take-off angles HOPG (002) Cu (200) take-off angle 2θ λ/Å Φ/n ...

chapter "Neutron Optics" 1.1 Location of the diffractometer The PSD powder diffractometer D20 shares the beam tube H11 in the reactor (level C) with two other instruments: the PSD single crystal diffractometer ... described. A monochromator may be choosen by turning the changer in the protected monochromator and beam tube housing, muliple take-off ...

to the diffraction position. Finally the fourth circle 2θ, rotates the detector to the diffracted beam. The closed Eulerian Cradle of D9 is stout enough to accommodate sample environment devices such as