International Beam Instrumentation Conference (IBIC) 2021 is hosted by Pohang Accelerator Laboratory (PAL) which has two major light source facilities in Korea. PAL is operating the upgraded Pohang Light Source (PLS-II) and X-ray free electron laser (PAL-XFEL) on its campus. PLS-II is a third-generation synchrotron radiation facility with 36 working beamlines. PAL-XFEL is a normal conducting hard X-ray FEL based on normal conducting technology, with two hard and one soft X-ray experimental station. In this presentation, the present status of PLS-II and PAL-XFEL will be introduced.
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Experimental Test of 8-Channel-Stripline BPM for Measuring the Momentum Spread of the Electron Beam at Injector Test Facility of Pohang Accelerator Laboratory
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C.K. Sung, M. Chung, S.Y. Kim, B.K. Shin
UNIST, Ulsan, Republic of Korea
C. Kim, I.H. Nam
PAL, Pohang, Republic of Korea
A stripline beam position monitor has been developed with 8 feedthroughs in order to non-destructively measure the momentum spread of an beam. The beam momentum spread causes the variation of transverse beam width at a dispersive section and can be detected by the multipole moment based analysis of the beam-induced electromagnetic field. The feasibility of such a device has been tested with electron beam generated in the beamline of Injector Test Facility (ITF) at Pohang Accelerator Laboratory (PAL). The result of beam test will be presented and the future plan for an application to bunch compressors at X-ray Free Electron Laser (XFEL) of PAL will be followed.
Performance of the SLAC-PAL-Vitzrotech X-band Cavity BPMs in the LCLS-II Undulator Beam Lines
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C.D. Nantista, S.L. Hoobler, P. Krejcik, D.S. Martinez-Galarce, B.D. McKee, M. Rowen, A. Young
SLAC, Menlo Park, California, USA
C. Kim
PAL, Pohang, Republic of Korea
Funding:Work supported by US DOE Contract No. DE-AC02-76SF00515. The hard X-ray and soft X-Ray undulator beamlines of the LCLS-II X-ray FEL incorporate 65 X-band RF beam position monitors for accurate tracking of the electron beam trajectories and Beam-Based Alignment. For this crucial function, a design was jointly developed between PAL and SLAC, consisting of a monopole reference cavity and a dipole position cavity, with signals coupled out through coaxial vacuum feed-throughs. For the relatively large quantity needed, the production of completed units was contracted to the Korean company, Vitzrotech, who developed the manufacturing processes to successfully fabricate the needed quantity. Herein, an overview is given of the production experience, tuning, installation, and performance of these devices.
