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M.Theo Rekveldt, Wim G. Bouwman, Wicher H. Kraan, Serguei Grigoriev, Jeroen Plomp

PNT-JRA meeting 18 nov. 2004. Resonant Larmor precession for 3 dim. Pol. analysis in field - Field stepper beween opposite fields - Magnetised foils as p-rotator. M.Theo Rekveldt, Wim G. Bouwman, Wicher H. Kraan, Serguei Grigoriev, Jeroen Plomp Reactor Institute Delft, TU Delft,

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M.Theo Rekveldt, Wim G. Bouwman, Wicher H. Kraan, Serguei Grigoriev, Jeroen Plomp

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  1. PNT-JRA meeting 18 nov. 2004 Resonant Larmor precession for 3 dim. Pol. analysis in field- Field stepper beween opposite fields- Magnetised foils as p-rotator M.Theo Rekveldt, Wim G. Bouwman, Wicher H. Kraan, Serguei Grigoriev, Jeroen Plomp Reactor Institute Delft, TU Delft, The Netherlands Activities:

  2. Resonant Larmor precession for 3 dim. Pol. analysis in field B2 B B1   k k   x0 x1 x2 x3 x4 Level scheme of k and w x with

  3. Application in diffraction a /2 P B2 Homogeneous precession, only in time in sample or in sample environment B1 neutrons Bsample B1 a = precession device for compensation /2 I(t) gives orientation dependence of P during scattering. Phase shift in I(t) gives DP in sample when Bsample =/=B2. A PSD

  4. Diffraction example B y S x Q Dj DA ~ I(P.Q) DI ~ I(DPz) Dj ~ Bsample I [arb.u.] A DI p/Dw 2 p/Dw x y t

  5. Hz(z) Hzc(z) Hxc(z) Hzc(x) Hx Hxc(x) z x zh z a) b) Field stepper beween opposite fields P M1 M2 CS Dia M3 M4 A Det y z x

  6. Exp. Calc.

  7. y Neutrons z x Magnetised foils on Si as p-rotator current 9 mm 12 cm M Hc

  8. P(H//) at different frequencies 0 H// 0 H//

  9. Activities near future • Movable wall for pulsed beam applications • Test in chopped TOF beam • SESANS set-up without field transitions • Realisation PSD in SESANS set-up for first • reflectometry measurements • Wishes: • Cooperation in Permalloy films?

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