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TY - CONF AU - Smith, T.L. AU - Waldschmidt, G.J. ED - Schaa, Volker RW ED - Power, Maria ED - Shiltsev, Vladimir ED - White, Marion TI - Tuning of the APS Linac Accelerating Cavities After Structural Re-Alignment J2 - Proc. of NAPAC2016, Chicago, IL, USA, October 9-14, 2016 C1 - Chicago, IL, USA T2 - North American Particle Accelerator Conference T3 - 3 LA - english AB - A new S-band LCLS type Photo-cathode (PC) gun was recently installed in the APS linac. As a consequence, it was recognized that many of the linac accelerating structures were out of their 1mm straightness tolerances. In order to reduce the effects of wakefield on the beam, several of the misaligned structures were straightened. This paper discusses the bead-pull RF measurements, the effect of the straightening efforts on rf and the cell to cell retuning efforts that were performed. PB - JACoW CP - Geneva, Switzerland SP - 910 EP - 912 KW - ion KW - linac KW - cavity KW - cathode KW - photon DA - 2017/01 PY - 2017 SN - 978-3-95450-180-9 DO - 10.18429/JACoW-NAPAC2016-WEPOB11 UR - https://jacow.org/napac2016/papers/wepob11.pdf ER -