Beamline Phone Number:
+44 (0) 1235 778418
Principal Beamline Scientist:
Dave Allan
Tel: +44 (0) 1235 778644
E-mail: [email protected]
Email: [email protected]
Tel: +44 (0)1235 4494052
The cryostream can be controlled via the GDA – this means it is easy to queue temperature changes between data collections.
Select Temperature Ramp from the series of tabs on the right-hand side of the GDA.
Click the “Queue Ramp” button - this will add the temperature change to the end of the list of queued jobs or, start it immediately if the queue is empty.
NOTE: If the temperature change is queued via the GDA, then any other commands set by the GDA will be queued to start once the temperature ramp is completed. Therefore, on some occasions it may be more efficient to use EPICS to control the temperature in order to keep the GDA free for other tasks.
Notes:
1) The Mitegen mounts change length depending on the temperature, so it is important to check the crystal centring at regular intervals, e.g., every 30K. Anecdotally, this change is less when using the tall copper mounts.
2) There is an optical effect which means the centre position will appear to move when the cryostream is at different temperatures – make sure to centre the crystal on the centre of mass as it will be impossible to maintain the centre on the crosshair.
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