NSRRC Activity Report 2023

Facility Development and Status 103 Fig. 3 : Spectra of the electron beam orbit in the horizontal direction when using the SSPA RF transmitter and the klystron-based RF transmitter. [Figure courtesy of Chih-Hsien Huang] approximately 7 kHz. The trend in the accelerator field is the application of SSPAs as high-power RF sources. We have dedicated efforts to solid-state technology development and constructed a 500-MHz and 300-kW SSPA RF transmitter system at the TPS. This SSPA RF transmitter has been employed during routine operations at the TPS, enhancing the RF system power efficiency and stability. This approach effectively reduces disturbances to the electron beam and minimizes trip events. (Reported by Fu-Tsai Chung, Fu-Yu Chang, Shian-Wen Chang and Zong-Kai Liu) References 1. T.-C. Yu, L.-H. Chang, M.-H. Chang, L.-J. Chen, F.-T. Chung, M.-C. Lin, Y.-H. Lin, C.-H. Lo, M.-H. Tsai, C. Wang, T.-T. Yang, M.-S. Yeh, Proc. IPAC’ 12 , WEPPD075 (2012). 2. T. C. Yu, Ch. Wang, L. H. Chang, M. S. Yeh, M. C. Lin, C. H. Lo, M. H. Tsai, F. T. Chung, M. H. Chang, L. J. Chen, Z. K. Liu, C. L. Tsai, F.-Y. Chang, Proc. IPAC’ 16 , MOP- MY031 (2016). 3. T. C. Yu, Ch. Wang, L. H. Chang, M. S. Yeh, M. C. Lin, C. H. Lo, F. T. Chung, M. H. Chang, L. J. Chen, Z. K. Liu, F.-Y. Chang, S.-W. Chang, Y.-D. Li, Proc. IPAC’ 19 , THPTS074 (2019). Micro-Focused Single Crystal X-ray Diffraction Beamline at Taiwan Photon Source T PS 15A is a new Taiwan Photon Source synchrotron beamline designed for the analysis of challenging materials and phenomenon thanks to single-crystal X-ray diffraction techniques. 1 The X-ray source of this beamline comes from a CUT18 cryo-undulator allowing an X-ray energy range of 9 to 35 KeV. A double crystal monochromator allows for the selection of an appropriate wavelength for monochromatic measurements. The undulator can also be used in tapered mode which, combined with a double multilayer monochromator, will allow the generation of an X-ray “pink beam” (poly-chromatic, with bandwidth 3% or 5%). This setting allows for a higher flux, which is particularly useful for ultrafast measurements despite the fact that this requires more complex data analysis. TPS 15A X-ray optics allow investigations of samples structural properties down to just a few microns in size, owing to its X-ray micro-focussing capability, as well as up to very high resolution, due to its high brightness. This allows for fine and detailed analysis of materials atomic scale structures. TPS 15A has two endstations ( 15A1 and 15A2 , Fig. 1 ). The first endstation has a beam size at sample position of 150 microns (adjustable by slits) and is equipped with a vertical Eulerian cradle goniometer (four circles goniometer) with a photon