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PF1B
Polarised cold neutron beam facility
Characteristics
| Guide hall n1 (ILL7), cold neutron guide H113 |
|---|
| Vertical liquid deuterium cold sourcesuper-mirror (m=2) ballistic neutron guide H113, 76 m length |
| Un-polarized beam cross-section |
| 6 cm by 20 cm |
| Height of the neutron beam above the floor level |
| PF1B: 140 cm |
| Mean neutron wavelength |
| 4.0-4.5 A |
| Un-polarized equivalent flux at guide exit |
| 2·1010n/cm2/s |
| Polarized beam cross-section |
| 3 cm by 4.5 cm or 6 cm by 8 cm |
| Polarized equivalent flux |
| 3·109n/cm2/s |
| Polarizers |
| Curved stack of glass plates with double sided super-mirror coating, polarization 98%Crossed geometry of two super-mirror polarizers, polarization 99.7% |
| Spin-flippers |
| "Current-sheet" and adiabatic radio-frequency flippers; efficiency >99.5% |