Facility News: 14-ID Upgrade Nears Completion

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- September 2007 -

BioCARS has completed a major upgrade to the 14-ID beamline. The new configuration extends the time-resolved crystallography capability to the 100ps time domain, while utilizing the standard 24-bunch mode of the APS storage ring.

X-ray source

The previous undulator A (U33) has been replaced by two new undulators (U23 and U27), used in a collinear configuration. For pink-beam time-resolved experiments, the new sources will provide more than 10¹⁰ photons per single 100ps X-ray pulse (APS 24-bunch mode, ~4mA/bunch).

Optics

A newly installed Kirkpatrick-Baez mirror system will improve the focusing of the X-ray beam from the original ~1:1 to ~8.3:1(h)/5.2:1(v) and bring the beam size to 90 µm² (h) x 35 µm² (v). A new optics enclosure (14-ID-C SOE) was built to house the new mirror pair. Also, a new Kohzu monochromator (Si 111), installed in the 14-ID-A FOE, rounded out the optics upgrade.

Timeline

May 2006    --    Vertically-focusing mirror installed
May 2006    --    Monochromator installed
September 2006    --    Undulator installed (U27)
October 2006    --    Horizontally-focusing mirror installed
January 2007    --    Undulator installed (U23)