[ Identification | Description | Input parameters | Links ]
ISIS_MERLIN InstrumentMerlin has been in user operation since 2008. It was designed to be a high intensity, medium energy resolution spectrometer that would complement the high-resolution MAPS spectrometer, and replace the HET spectrometer. Merlin's design exploited recent advances in technology with a supermirror guide to enhance flux, as well as 3 m long position-sensitive detectors in a vacuum, making it ideal for the study of single crystals. The detector bank covers a massive \pi steradians of solid angle with an angular range from -45 to 135 degrees in the horizontal plane, and \pm 30 degrees in the vertical plane. This allows large swathes of Q,\omega space to be accessed in a single run. Since 2014, Merlin has been running in event mode, and by using the new Gd chopper combined with a disk chopper, it is able to run in repetition-rate multiplication (RRM) mode, allowing users to simultaneously measure with several incident energies.
| Name | Unit | Description | Default |
| E_min | meV | lowest energy sampled [meV] | 1.0 |
| E_max | meV | highest energy sampled [meV] | 2000.0 |
| m | float | m value of guides | 3.0 |
| E_foc | meV | energy selected by chopper [meV] | 80.0 |
| nu_hz | Hz | frequency of chopper rotation [Hz] | 200.0 |
| type | int | chopper package selected sloppy chopper = 1, B chopper = 2, Gd chopper = 3 | 3 |
ISIS_MERLIN.instr.
[ Identification | Description | Input parameters | Links ]
Generated on 2023-09-19 20:01:36