Parameters Properties of EIGER

component properties value
monochromator double focusing
15 x 9 pieces PG
20 x 20 mm2 each
alignment: < +-0.1°
30` mosaicity
virtual source 10mm < width <40mm  
shielding non-magnetic  
beam size at sample double focusing condition 40 x 40 mm
filter PG (37 or 70mm)  
analyzer PG horizontal focusing  
detector 3He-tube  
collimation 20`,40` or 80` available  
elastic resolution at kf = 2.66 Å-1 0.66 meV
energy transfers at kf = 2.66 Å-1 -11meV ≤ EN ≤ 60meV (accessible)
-10meV ≤ EN ≤ 45meV (recommended)