MS38-P01 Current Status of Time-resolved X-ray Crystallography Beamline TPS 09A at Taiwan Photon Source Hwo-Shuenn Sheu (National Synchrotron Radiation Research Center, Hsinchu, Taiwan) Yi-Wei Tsai (National Synchrotron Radiation Research Center, Hsinchu, Taiwan) Ying-Yi Chang (National Synchrotron Radiation Research Center, Hsinchu, Taiwan) Wei-Rein Liu (National Synchrotron Radiation Research Center, Hsinchu, Taiwan) Yin-Yu Lee (National Synchrotron Radiation Research Center, Hsinchu, Taiwan) Lai-Chin Wu (National Synchrotron Radiation Research Center, Hsinchu, Taiwan) Chung-Kai Chang (National Synchrotron Radiation Research Center, Hsinchu, Taiwan) Kuan-Li Yu (National Synchrotron Radiation Research Center, Hsinchu, Taiwan) Shih-Lin Chang (Department of Phyics, National Tsing Hua University, Hsinchu, Taiwan)email: hsheu@nsrrc.org.twThe TPS 09A beamline of Taiwan Photon Source (TPS) is designed for time-resolved laser pump X-ray probe crystallography experiments. TPS 09A has opened to general X-ray scattering users since September 2016. TPS is a third generation synchrotron source which operate at 3.0 GeV, 400 mA (design gold 500 mA), with beam emittance of 1.6 nm rad. The source of TPS 09A beamline is delivered from two IU22 undulators which provide temporal coherence X-rays of 5.6-25 keV. Follow the double crystal monochrotromator (DCM with two Si(1 1 1) crystals) is a horizontal focusing mirror. The beam size at the entry of experimental hutch is about 700 mm x 600 mm (H x V). Inside the hutch, the X-ray focus by a compound reflection lens, a Juelich chopper (the chopper will be delivered in the summer of 2019) and a Huber 9-circles diffractometer. Server detectors can be choiced for X-ray scattering, such as Pilatus 200K, Perkin Elmer XRD 1611 xP, and CsI point detector. A new area detector is now planning. A Ti-Sapphire with 35 fs pulse laser is located at the second hutch and can bring the 800 nm or 400 nm pulse laser to sample position. The synchrotron X-ray bunch length is about 35 ps. For lack of the Juelich chopper, we have test a las er pump X-ray probe time resolve X-ray diffraction experiment by using single bunch injection at TPS. The electron current is maintained at about 2 mA with top up injection for every 8 mins. The diffraction intensity and position of Si (111) is monitored during different laser pumping time. The FWHM of the intensity variation is about 250 ps.  It demonstrated that the time scale of laser pump X-ray probe can be determined in 100 ps time scale. The structure of the excited sates of some organic and inorganic luminesce compounds are under investigations.References:

Keywords: Time-resolved X-ray Crystallography, Laser Pump X-ray Probe, Synchrotron Radiation