2θ range : - ω angle range : - degs

Sample	q-vectors
a* : A-1 b* : A-1 angle between a* and b* : deg. Reflection condition none H+K=2n H=2n K=2n H,K all even or all odd -H+K=3n ωoffset :	q1 : h , k q2 : h , k q3 : h , k

Neutron energy Ef = meV, PG(002) Heusler(111) λ = A, k = A-1 A1 = deg, C1 = deg. (Possible Efs with a PG filter are 14.7, 30.5 and 34.05 meV) Target reflection (Ht,Kt,Lt)=(,,0) Fix the incident direction. |Q|(=2π/d) = A-1 2θ = deg A2 = deg, C2 = deg. Q-vector → ki → kf → Gray circles are powder rings of Al.