For the examination of macro molecules and proteins we have developed, in co-operation with the University of Paderborn, special glass capillaries with a particularly large diameter. These capillaries can serve as substitute for expensive sapphire chambers. For the examination of macromolecules by means of synchrotron radiation we have developed a capillary of 4.1 mm diameter and a wall thickness of only 50 µm. Aside from this size, there are also sizes between 2.1 and 5.2 mm available.

Further information about the use of these capillaries you can find in the DESY annual report 2001.

The thin-walled tubes have the following advantages:

• Low absorption
• High heat conductivity
• Minor scattering
• Evenly thin walls
• Low weight