In this section
Maps
Maps is an inelastic spectrometer designed to study excitations in materials. Maps is used to study dynamics with energies as low as a few meV, up to hundreds of meV. Research areas include magnetism, quantum materials, catalysis and molecular spectroscopy experiments.
Instrument scientists
To find out more about each team member, click the + symbol.
Technical information
| Beamline | S1 |
| Moderator | 300K water moderator poisoned at 1.5 cm |
| Incident energy | 15 - 2000 meV |
| Energy resolution | Depends on the choice of Fermi chopper. Δℏω/Ei = 2 - 5% FWHH at elastic line (ℏω = 0) ≫1.5% FWHH at full energy transfer (ℏω = Ei) |
| Primary flight path | 12 m |
| Secondary flight path | 6 m |
| Fermi chopper | 10 m from moderator
50 - 600 Hz phased to ISIS pulse ± 0.1 ms Several chopper packages are available, optimised for different incident energy and resolution requirements: S chopper - flexible standard package suitable for 10 < Ei < 3000 meV, 1.5 - 5% Ei typical resolution, higher flux than the A chopper A chopper - high resolution package, suitable for Ei>100 meV; 1.5% - 5% Ei resolution |
| Background chopper | 8.5m at 50 Hz or 100 Hz |
| Sample position | 12.0 m from moderator |
| Beam size at sample | 55 mm x 55 mm, motorised jaws can define smaller beam sizes |
| Detectors | 6 m from sample position Approx. 16 m2 array of 147,456 pixel elements Position-sensitive 3He tubes (10bar partial pressure) 2.5 cm diameter, resolution 15 mm along their lengths Low-angle bank 3 - 20º, 30º in the corners (438 x 1 m and 1.3 m PSDs) High-angle bank 20 - 60º 1 m (136 x 1 m PSDs) |
| Intensity at sample | 5000 n cm-2 s-1 Δℏω/Ei = 2% at elastic line |
| Ei = 500meV | 20000 n cm-2 s-1 Δℏω/Ei = 5% at elastic line |
| Sample environment | Closed cycle refrigerator, 4 - 600K |
Related resources
Monitoring the experiment and simple analysis
Mantid a program to reduce, visualise and analyse all ISIS data.
Data reduction
Mantid a program to reduce, visualise and analyse all ISIS data.
Visualisation and analysis
MSlice visualisation of single crystal and powder data from a single run. Matlab based, although a standalone version can be provided.
Horace provides generation, visualisation, simulation and fitting of large 4-dimensional datasets obtained by making multiple measurements of a single crystal with varying sample orientation or incident energy. Matlab based.
Tobyfit a program to simulate and fit time-of-flight inelastic scattering data, incorporating instrument resolution. The latest version of this software runs in Matlab with a graphical user interface. For the old command-line driven Fortran version, contact Toby Perring.
Mantid a program to reduce, visualise and analyse all ISIS data.
Recent publications
Instrument reference
All publications and datasets based on experiments using Maps should cite that the data is collected by DOI: 10.5286/isis.instrument.9577. Experiment DOIs follow the format 10.5286/ISIS.E.RBXXXXXXX, where XXXXXXX is the 7-digit experiment (RB) number and these can be viewed via the Data Gateway.