| Paper | Title | Page |
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| THPMW041 | Single Crystal Diamond X-ray Lens Development | 3643 |
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Funding: Phase I DOE SBIR The next generation light sources such as diffraction-limited storage rings and high repetition rate free electron lasers (FELs) will generate x-ray beams with significantly increased peak and average brilliance. These future facilities will require x-ray optical components capable of handling large instantaneous and average power densities while tailoring the properties of the x-ray beams for a variety of scientific experiments. In this paper we report on research and development of a single crystal diamond compound refractive lens. Diamond is the best material for high heat load applications. Moreover single crystal lens preserves coherence of the x-ray beam because scattering from grain boundaries, voids and impurities, typical for current beryllium lenses is minimized. A set of two-dimensional single crystal diamond lenses had been fabricated by fs-laser cutting and tested at Advanced Photon Source (Argonne). |
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| THPOY019 | Design and Implementation of Control Interface and Timing Support of TPS Phase-I Beamlines | 4128 |
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| Taiwan Photon Source (TPS) with low emittance provides extremely bright X-rays. Seven advanced phase-I beamlines of TPS are being constructed and commissioned. The control interfaces for a beamline or experimental station and support from the accelerator control system are designed and are being implemented. The beamline control interface and supports include a beamline interlock status monitor, accelerator timing transmission, broadcast of accelerator operating status, transmission of the beam-current reading and control of insertion devices. This report summarizes the efforts in implementing the beamline EPICS IOC and support from the accelerator control system during beamline commissioning in TPS phase-I. | ||
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| THPOY049 | Helical Undulator as a Source of Spectromicroscopy Beamline of ILSF | 4217 |
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Regarding user requirements of spectromicroscopy beamline such as high flux, small spot size, linear and circular polarization light, a helical undulator have been chosen as a source for this beamline. Radiation properties of the source e.g. flux, flux density, brilliance, size and divergence of the photon beam, power, power density, angular distribution of power and flux on the axis of the undulator have been considered by theoretical formula and using SPECTRA code. At the circular polarization, the first harmonic covers the energies in the 100-1300 eV range and for the linear polarization energy ranges, 100-1000 eV and 1000-1500 eV, are provided by the first and third harmonics respectively. In the case of circular and linear polarization mode, maximum flux in the central cone for maximum undulator strength are 4.5 × 1016 (ph/s) at kX=ky=3.6 and 2.4 × 1016 (ph/s) at K=5.
* James A. Clarke, "The science and technology of undulators and wigglers", 2004. ** H. Onuki, P. Elleaume, "WIGGLERS UNDULATORs and their APLICATIONS", 2003. |
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| THPOY050 | Time Response of a Gridded X-ray Beam Ionization Chamber | 4220 |
| SUPSS083 | use link to see paper's listing under its alternate paper code | |
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| Recently, Quick-Scanning Extended X-ray Absorption Spectroscopy (QEXAS) has become an important tool for in-situ characterization of materials and measurement of associated electronic structure. In this case the time response of the ionization chamber affects the measurement resolution and therefore overall performance of the QEXAS system. Common parallel-plate ionization chambers have a step-response rise time of about 0.1 sec, which does not meet the requirements of QEXAS. To speed up the response, we constructed a gridded ionization chamber with variable bias voltage and optional background gas (N2 or He, respectively). To characterize the system we used a high-frequency beam chopper upstream of the ionization chamber and a high-speed, low-noise preamplifier to measure the step response of the chamber as a function of bias voltage and background gas conditions. | ||
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| THPOY052 | Current Status of HES (Hard X-ray EndStation)-2 Beamline at PAL-XFEL | 4225 |
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| HES (Hard X-ray EndStation)-2 beamline is located at the hard X-ray experimental hall at PAL-XFEL. The main objective of HES-2 beamline is to deliver a hard X-ray FEL beam to target materials in such a manner that a coherent diffraction study is possible. This endstation is supposed to provide brilliant hard x-rays and to measure the diffraction patterns with forward scattering geometry. In particular, the instruments are designed for serial femtosecond X-ray crystallography (SFX) and coherent diffraction imaging (CDI). In this poster, we introduce HES-2 beamline at PAL-XFEL in terms of two perspectives: beamline instrumentation and sample environment. In the instrumentation part, the current status of HES-2 beamline is described in details. This includes beamline layout, x-ray optics, beam diagnositics and the upcoming commissioning plan for HES-2 beamline. In the sample environment part, we aim to present scientific goals based on the sample environments for CXI and SFX respectively. Finally, we discuss the feasible demo-experiments, which is expected to be done in 2016. | ||
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