A standard data collection protocol will be used:
1. Data will be collected at room temperature using the multi-analysing crystal (MAC) system and robotic sample changer. There are some types of materials which suffer from radiation damage (e.g. some pharmaceuticals and hydrogen storage materials). In cases such as these, PSD scans will be used instead to reduce exposure to X-rays and to ensure you get the best possible data from your sample.
2. The energy of the x-ray beam will be 15 keV ( ~ 0.826 Å).
3. The angular range of the data will be 2= 3 -150º, binned at 0.001º step and collected for a standard scan time of 1/2 hour. A silicon scan is shown below for reference.
4. The final data file will be a 3 column data file (2Intensity, Error). Any further data handling and analysis is the responsibility of the user.
5. Powder specimens must be loaded and sealed into 0.5 or 0.7 mm (diameter) glass capillary with a sample length of 40-60 mm. The length is important so that it can easily be mounted on to the brass tip ready for the measurement.
6. The use of borosilicate glass capillaries is preferred. Care should be taken when choosing and sealing a capillary to provide a straight ended specimen such that it can be mounted on the brass holder.
7. If a sample cannot be correctly mounted on the brass holder the user may be requested to send a replacement.
8. If possible, it is preferrable for users to send two prepared samples.
9. Samples should be delivered to Diamond by post or courier. All prepared samples must be packaged appropriately and sent in advance to:
Dr. Claire Murray
Beamline I11 -Rapid Access Facility
Diamond Light Source
Harwell Science & Innovation Campus
Oxfordshire OX11 0DE
Full safety information must be enclosed with all samples.
All samples must arrive at DLS at least 7 days prior to the date of scheduled beamtime.
10. Unless special arrangements have previously been agreed with beamline staff, samples will be disposed of 2 weeks after data collection.
Applicants with proposals or requirements that lie outside of these guidelines are encouraged to contact I11 beamline staff to discuss other possible access routes.