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sensitive detectors with an angular resolution of 0.125º. The available 2θ-range is 1.5º to 140º. Because there are 7º in between two detectors, 2-positions scans are required to produce a complete diffraction

PG 002: 2.20 ... 3.60 Å PG 004: 1.10 ... 1.80 Å Cu 220: 0.85 ... 1.50 Å Cu 111: 1.25 ... 2.24 Å take-off angle 2θM 39 ° ... 65° resolution δ> E i / E i 3 ... 6 % flux on sample 5 x 105 cm -2 s -1 background ... choppers ν max 5 000 rpm Fermi chopper ν max 32 000 rpm duty cycle 3 x 10 -3 beam size on sample 2 x 4 cm 2 primary collimation δθ 1° ...

Flux at Sample Position IN4C: MEASUREMENT OF THE FLUX AT THE SAMPLE POSITION (pdf - 2.06 Mi)

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 ...

x 75 mm 2 Monochromator crystal d -spacing in Å k i in Å -1 flux in 10 6 n cm -2 s -1 PG (002) 3.355 1.3 - 3.3 2.662 9.3 Cu (111) 2.087 2.0 - 5.3 2.662 3.6 Heusler (111) 3.452 1.3 - 3.22.662 2.0 Collimation ... Collimation α1 = (0.015/ki) rad/Å -1 α2, α3, α4 = 10', 20', 30', 40', 60' adjustable by soller collimators Analyser horizontally focussing ...

Typical diffraction patterns The graph shows the diffraction patterns for H 2 O and D 2 O as measured on D4. After Fourier transformation such diffraction patterns provide information about the spatial

(meV) ΔEi (meV) Cu(220) 1.278 [26-500] 2-3% Ei Cu(331) 0.829 [67-500] 1.5-2% Ei Si(311) [16.5-60] 0.8 Si(111) [4.5-20] 0.8 Collimation Boron coated collimators α2, α3, α4 = 20', 30', 40', 60' Sample beam ... beam size at sample position 3x3 cm 2 Analysers Focusing reflecting surface of 1 m 2 built around the vertical sample-detector axes from PG002 ...

reg), with 2theta, intensity and error, after regrouping numors from 175568 to 175579. prompt> d4creg -z 0.5 -o sample.reg 175568 175579 This command produces a diffractogramme where the 2theta values ... values are corrected by the zero angle, i.e. 2theta= 2theta_read - 0.5 prompt> d4creg -z 0.5 -w 0.495 -o sample.qreg 175568 175579 This command ...

Multianalyser crystals 9 independent turnable blades 40 x 120 mm2 each plastically bent Ge111 (R = 5m) Acceptance angle ~ 9° Gain in counting rate a factor 3 mechanism completely amagnetic no mechanism ... software Position sensitive Detector He filled tubes 54 tubes of Φ = 9 mm 1 mm spacing size 539 x 200 mm 2 Horizontal spatial resolution 5 mm ...

measurement: Ge Phonons measured on the dispersive mode: constant q scans 9 blades at constant kf = 2.662 Å -1 ~ 6 min/point Phonons on the ~[111] direction