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@inproceedings{rehman:ibic2021-mopp10, author = {M.A. Rehman and T. Suwada}, title = {{Observation of Wakefield Effects with Wideband Feedthrough-BPM at the Positron Capture Section of the SuperKEKB Injector Linac}}, booktitle = {Proc. IBIC'21}, pages = {52--55}, eid = {MOPP10}, language = {english}, keywords = {wakefield, simulation, positron, experiment, vacuum}, venue = {Pohang, Rep. of Korea}, series = {International Beam Instrumentation Conference}, number = {10}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {10}, year = {2021}, issn = {2673-5350}, isbn = {978-3-95450-230-1}, doi = {10.18429/JACoW-IBIC2021-MOPP10}, url = {https://jacow.org/ibic2021/papers/mopp10.pdf}, note = {https://doi.org/10.18429/JACoW-IBIC2021-MOPP10}, abstract = {{At the SuperKEKB injector linac, positrons are generated by striking electron beam at tungsten target. The secondary electrons are also produced during positron creation and accelerated in the positron capture section. A new wideband feedthrough-beam position monitor (BPM) system was developed for synchronous detection of secondary produced e⁻ and e⁺ beams with temporal separation of about 180 ps. When e⁺/e⁻ bunches pass through the accelerating structure or vacuum duct of different radius, they generate wakefields. These wakefields can be directly observed with the feedthrough-BPM. A simulation study has also been carried to validate the observed wakefield effects with the feedthrough-BPM. The effects of wakefields on beam parameters will be reported in this paper.}}, }