GEM News
A mechanism for lifting the oscillating radial collimator was developed for a period of time, but the approach adopted became too complex - for pictures and a report click here. A new simpler mechanism is now under development, for likely installation in September 2007.
Click here to see successfully analysed disordered materials data, taken with the oscillating radial collimator in use.
The GEM detector electronics system has been successfully re-wired to a more logical layout. It is now possible to do a greater amount of ganging of detectors, and when this is done the non-counting time between runs is reduced. This is of advantage when doing many short runs to follow a time-dependent phenomenon.
Bank0 has been installed and is working well.
The extension to Bank5 (Bank5X) has been installed, and is running successfully.
The following detectors are currently installed on GEM:
| Bank | 2 theta | Number of modules installed |
Number of detector elements installed |
Status |
| 0 | 1.1° - 3.2° | 4 | 80 | Complete |
| 1 | 5.6° - 12.5° | 6 | 330 | Complete |
| 2 | 13.8° - 21.0° | 4 | 320 | Complete |
| 3 | 25.0° - 44.8° | 10 | 900 | Complete |
| 4 | 49.9° - 74.9° | 14 | 1400 | Complete |
| 5 | 79.0° - 104.0° | 18 | 2160 | Complete |
| 5X | 105.4° - 113.5° | 6 | 720 | Complete |
| 6 (formerly 6B) | 141.9° - 149.2° | 14 | 560 | Complete |
| 7 (formerly 6A) | 149.3° - 169.3° | 10 | 800 | Complete |
The computer controlled beam scraper has been successfully installed and commissioned.
ISIS proposals to use GEM can be submitted for the deadlines 16th April and 16th October each year.
Last updated on 25 Jun 2007 by Alex Hannon (a.c.hannon@rl.ac.uk)