Fernandes, H.C. Cappadoro, P.L. Harder, D.A. Hidas, D.A. Kitégi, C.A. Musardo, M. Rank, J. Tanabe, T. JACoW Publishing Geneva, Switzerland 978-3-95450-188-5 10.18429/JACoW-MEDSI2016-TUPE04 English 159-161 TUPE04 ion vacuum synchrotron-radiation synchrotron radiation Contribution to a conference proceedings 2017 2017-06 https://doi.org/10.18429/JACoW-MEDSI2016-TUPE04 http://jacow.org/medsi2016/papers/tupe04.pdf The purpose of this study was to determine the effect of beam mis-steering, on the temperature of the vacuum chamber. The chamber used for this study was for the Coherent Soft X-Ray (CSX) Elliptically Polarizing Undulator (EPU). Finite Element Analysis was conducted on the vacuum chamber to determine the temperature distribution on the chamber for set values of beam mis-steer, for NSLS-II. These results were then compared with on-site temperature measurements taken using RTD¿s, as well as thermal sensitive cameras. The accuracy of these results was analyzed and further FEA studies were proposed for steeper beam mis-steers and beam offsets.