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Looking to purchase or build an in-house SAXS camera, suggestions?
- To: sa_scat@nist.gov
- Subject: Looking to purchase or build an in-house SAXS camera, suggestions?
- From: Tobin Sosnick <trsosnic@midway.uchicago.edu>
- Date: Tue, 28 Jan 1997 11:32:06 -0600
Dear SAS Newsgroup: I am interested in either building or purchasing an in-house SAXS spectrometer to study the structure of protein molecules in solution. Can anyone suggest or comment on any available products (E.g. MBraun Kratky camera) or issues related to building a camera? One issue to consider is that proteins scatter very weakly unlike most synthetic polymers. This makes having a low background signal and high flux critical. One option is to build a ~2meter spectrometer using a ~10 cm focusing mirror (e.g. Charles Supper Co. sells very nice assemblies at a reasonable cost), a 10 cm position sensitive detector (e.g. TEC model 200) , and a 2kW sealed tube X-ray source with line focus. The focusing mirror is very desirable for flux reasons when using a sealed tube source. Q-range should be ~0.005 - 0.3 Ang-1. Also, does anyone know if CCD-based position sensitive detectors have become comparably priced to Xe filled detectors? TIA *************************************************** Tobin R. Sosnick, Ph.D trsosnic@midway.uchicago.edu (773) 834-0657 (office) Dept. of Biochemistry & Molecular Biology (773) 702-0439 (fax) University of Chicago 920 E. 58th Street Chicago, Il 60637 *************************************************** ** "If it was easy, someone else would have done it by now." ** ***************************************************
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