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6 --> A1 = -3, -2, -1, 0, +1, +2, +3 >SC A2 -40 DA2 0.1 NP 11 TI 10 scans A2, in steps of 0.1 degree, about A2=-40 degrees for 10 seconds per point. >SC A3 20.2 A4=40.4 DA3 -0.1 DA4 -0.2 gives a theta-two-theta ... variables. e.g. > DR KI 2.662 A2 40 sets two different targets for A2 and fails. Examples of valid DRive commands: > DR A1 10 A2 20 ...

values of λ are 0.7, 0.5 and 0.35 Å, and λ/2 filters are available for λ=0.7 Å and λ=0.5 Å. Collimation 2x2-slit horizontal + vertical diaphragm at 30 cm upstream of sample, plus additional vertical slits at ... Beam H8 Monochromators Si(11L=1,2,3), Cu(220) and Cu(331), all 20 cm high and 23 cm wide, all with variable horizontal and vertical ...

range 1.6 Å < λ <2.9 Å Beam cross section 2 x 5 cm 2 Interferometry Large perfect Si crystal interferometers of different designs coherent beam-separation 2 - 5 cm enclosed area up to 100 cm 2 path lengths ... 1.84 Å with beam area 1x1 cm 2 flux in front of interferometer 16000 n cm -2 s -1 flux in O-bean and H-beam 7000 n cm -2 s -1 contrast in ...

graphite (002) wavelength 2.52 Å flux at sample/n cm -2 s -1 7.9 x 10 6 crystal Germanium (311) wavelength 1.28 Å flux at sample/n cm -2 s -1 0.4 x 10 6 max beam size 5 x 2 cm 2 Detector 3 He multidetector ... tor containing 1280 cells angular range 2θ 128° radius of curvature 1.500 m detector efficiency 86 % at λ = 2.52 Å max diameter / mm ...

molecular mobility of H 2 and D 2 , even at temperatures exceeding 150 K. QENS measurements were carried out on the time-of-flight (TOF) spectrometer IN5. During QENS measurement, H 2 and D 2 gases were injected ... of protons and electrons, differing only in the number of neutrons. Deuterium (D 2 ) is a stable isotope of hydrogen (H 2 ) and plays ...

half maximum; fwhm = 2 * sqrt(2*ln2) * sigma r tuple The tuple returned by the function. r[0] : int , error code. If non-zero, an error has occurred. r[1] : str , error message. r[2]: float , value of the ... Functions USE gaussian returns the value of the gaussian function: f = (1 / (sigma * sqrt(2pi))) * exp(-0.5 * (x / sigma)**2) function call r ...

δλ/λ = 20%) ~1 x 10 8 n cm -2 s -1 Detector Cylindrical drum with internal neutron-sensitive image plates and read/erase system Neutron image plate Gd 2 O 3 doped BaF(Br.I):Eu 2+ Radius 160 mm Length 400 ... 400 mm Active area 1000 x 400 mm 2 Pixel size 100, 200, 400 µm 2 Sample environment (1) Ambient or (2) Oxford Cryosystems 'COBRA' cryostream ...

half maximum; fwhm = 2 * sqrt(2*ln2) * sigma r tuple The tuple returned by the function. r[0] : int , error code. If non-zero, an error has occurred. r[1] : str , error message. r[2]: float , value of the ... Functions USE gaussian returns the value of the gaussian function: f = (1 / (sigma * sqrt(2pi))) * exp(-0.5 * (x / sigma)**2) function call r ...

at the ILL – the same SANS technique was applied to 2H-NbSe 2 . “We very quickly saw that 2H-NbSe 2 was behaving in exactly the same way as MgB 2 : there was an almost identical suppression of one band ... org , prove the two-band superconductivity of 2H-NbSe 2 . “Although the transition temperature of 2H-NbSe 2 ( 6.95K, -266 o C) is lower than ...

from the vortex lattice in the type II superconductor MgB2. This experiment revealed the anisotropic nature of the double-gap behaviour in MgB2. The sample was a 98 microgram crystal, surely a record for ... used in neutron experiments. Small-angle diffraction from the vortex lattice in superconducting YNi2B2C. The usual hexagonal vortex lattice is ...