GEM Apertures
GEM has 5 remotely controlled apertures inside the incident beam collimation, and also a hand-adjusted beam-scraper inside the sample tank. These are at the following distances from the moderator.....
| aperture 1 | 6.352m |
| aperture 2 | 8.145m |
| aperture 3 | 10.265m |
| aperture 4 | 12.675m |
| aperture 5 | 15.350m |
| beam-scraper | 16.550m |
(The sample point is L1=17.0m from the moderator)
Last updated on 11 Jul 2001 by Alex Hannon (a.c.hannon@rl.ac.uk)