Table 2 Comparison of the simulated with the measured peak visibility of the nGI-setup.

From: A high visibility Talbot-Lau neutron grating interferometer to investigate stress-induced magnetic degradation in electrical steel

DC0

G1

Wavelength range

h1(μm)

Total exposure (s)

λ(Å)

Measurement

Simulation

Peak visibility

Peak visibility

0.4

π

3.0 Å–5.75 Å

43

1280

3.9

0.21

–

0.18

π

3.5 Å–4.5 Å

41

240

4.0

0.74

0.80

0.28

π

1.6 Å–6.0 Å

41

480

4.0

0.69

0.74

0.38

π

3.5 Å–4.5 Å

41

240

4.0

0.63

0.66

0.48

π

3.5 Å–4.5 Å

41

240

4.0

0.54

0.57

0.28

3π

1.6 Å–6.0 Å

123

480

3.75

0.60

0.61

  1. For the simulations (see Sec. 2.1) the effective parameters listed in Table 1 have been used. The measured visibility of the new setup is significantly larger than the visibility of the previous setup (first row) and approaches the theoretical optimum.
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