Switch instrument:
Tour virtuel
IN15
IN15 High Resolution Spin-echo spectrometer
Characteristics
| Guide hall n°2, cold polarising guide H511 |
|---|
| Neutron beam characteristics | |
|---|---|
| diameter at sample position | 40 mm |
| incident wavelength | 6 ... 25 Å |
| monochromatisation Δλ/λ (FWHM) | 15% (velocity selector) |
| incident beam divergence | <17 mrad |
| polariser | V cavity, 1 m long (provided by HZB Berlin) |
| FeCo-Si supermirrors on Si substrate | |
| analyser | FeCo supermirrors (provided by HZB Berlin) |
| Precession coils | |
|---|---|
| max. field of solenoid | 750 mT |
| max. field integral | 1.05 Tm |
| Detector | |
|---|---|
| 32 x 32 pixels, each 1 cm\(^{2}\) at a distance of 4.6 m from the sample1 bar \(^{3}\)He and 0.3 bar CF\(_{4}\) | |
| area | 32 x 32 cm\(^{2}\) |
| pixel size | 1 cm\(^{2}\) |
| angular range θ | 2° ... 70° (Cryostat) |
| 2° ... 30° (Oven, Sample Changer) | |
| angular resolution | 2 x 10\(^{-3}\)rad |
Instrument Description
The spin-echo spectrometer IN15 is a conventional spin echo spectrometer using a velocity selector and a neutron guide between selector and precession magnet.
A wide wavelength band is used covering a large area in q-time space even for one single detector position).
Normal mode of operation
Due to the use of neutrons of long wavelength (6 Å < λ < 25 Å) IN15 offers a better energy resolution (proportional to λ-3 ) than its predecessor IN11 and it reaches considerably lower q-values (proportional to λ-1 ).
Summary of the performance at λ = 17.3 Å
- The intensity is sufficiently high for typical small-angle scattering experiments.
- Maximum Fourier Time of 1000 ns
- Q-range from 0.01 Å\(^{-1}\) up to 0.42 Å\(^{-1}\)