{"id":116,"date":"2021-03-17T11:55:21","date_gmt":"2021-03-17T11:55:21","guid":{"rendered":"https:\/\/www.embl.org\/groups\/macromolecular-crystallography\/?page_id=116"},"modified":"2025-10-28T13:54:06","modified_gmt":"2025-10-28T13:54:06","slug":"p14-eh2","status":"publish","type":"page","link":"https:\/\/www.embl.org\/groups\/macromolecular-crystallography\/p14-eh2\/","title":{"rendered":"Beamline P14.EH2"},"content":{"rendered":"\n
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Annual Call for Proposals 2026<\/b>
\r\n\r\nThe call for proposals to apply for beamtime between April and August 2026 is now CLOSED.<\/p>\n <\/div>\n<\/div> \n\n\n\n\n

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Time-resolved Crystallography ‘T-REXX’<\/h2>\n\n\n\n

A second endstation dedicated to pump-probe time-resolved macromolecular crystallography, T-REXX (Time-resolved experiments with crystallography), is in operation on the EMBL beamline P14 on PETRA III since late 2018. The development and the construction of the endstation was realized in a collaborative project between Hamburg University (Arwen Pearson) and EMBL Hamburg (Thomas R. Schneider) funded by a collaborative ‘Verbundforschung’ grant from the German Ministry for Research and Education, BMBF.<\/p>\n\n\n\n

The endstation features a fixed energy (12.7 keV) beam with a flux of ~2 x 1012<\/sup> ph\/s through a 15 x 10 \u00b5m2<\/sup> cross section. While the endstation is not equipped with a standard diffractometer, it offers various means for beam conditioning, and pre-installed lasers and laser-optics.  The sample space is open and accessible so that different sample presentation and\/or pump-probe technologies can be installed.<\/p>\n\n\n\n

As the T-REXX endstation is physically separated from the first endstation of P14, elaborate and time-consuming setup works for pump-probe time-resolved experiments can be performed without impeding the standard user operation on beamline P14. Only once the instrumentation for a time-resolved experiment is in place, the beam is then guided to the T-REXX endstation.<\/p>\n\n\n\n

\"T-REXX<\/a>
T-REXX endstation with a crystallographic chip featuring ca. 20000 well for storing protein micro-crystals mounted on an xy-table. Foto: EMBL\/Kinga Lubowiecka<\/figcaption><\/figure>\n\n\n\n

External links<\/h3>\n\n\n\n