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Station Scientist

Mike MacDonald

email:email m.a.macdonald@dl.ac.uk
Telephone:phone+44 (0)1925 603627
Deputy Station Scientist

Rob Kehoe

email:email r.c.kehoe@dl.ac.uk
Telephone: phone+44 (0)1925 603626
Station Telephone


Telephone:phone +44 (0)1925 603842
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STATION 14.1

Description

Protein Crystallography, non-crystalline diffraction.

This station provides a focused x-ray beam at either 1.488 Angstrom or 0.977 Angstrom. The station is designed for protein crytallography data collection from crystals as small as 50 microns.

The Station can be used for Multiwavelength Anomolous Diffraction (MAD) data collection near the two wavelengths listed.

The station is also used for non-crystalline diffraction experiments on samples as diverse as corneal tissue and archaeological samples.

Functional Description

Station 14.2 provides a focused, collimated, monochromatic, X-ray beam with high energy resolution at wavelengths of 0.977 Å and 1.48 Å. The station is designed for protein crytallography data collection from crystals as small as 50 microns. It is equipped with a Quantum 4 ADSC detector.

The station is also used for non-crystalline diffraction experiments.

Technical Description

The station accepts a fan of 4 mrad of radiation from the side of the multipole wiggler fan (-1.5 to -5.5) mRad. This is focued vertically by a (1.2 m long silicon substrate, rhodium coated, water cooled) mirror. The monochromator is one of two assymetric cut Si (111) crytals optimed for 1.488 Angstrom and 0.98 Angstrom wavelengths. These crystals give a compression ratio of 10:1. Typically the focal spot is 200 micron by 200 micron with a horizontal divergence of 4mRad and a vertical divergence of 0.4mRad.

The station is equipped with a Quantum 4 ADSC detector, a single axis (phi) rotation camera and a (100K)cryojet.

Benchmark

Typical data collection times are a few tens of seconds to a few minutes per image.

Typically with slit settings of 200 micron by 200 micron the (amplified) io chamber reading should be better than 2.0V with an SRS current of 200mA.

Technical support

Technical support may be obtained (during normal hours) from by dialling the 14.1 station support mobile phone.

Short Code : 1572 (from any lab phone) or : 0773 327 6458

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