O'Shea, F.H. Agustsson, R.B. Chen, Y.C. Palmowski, A.J. Spranza, E. JACoW Geneva, Switzerland 978-3-95450-180-9 10.18429/JACoW-NAPAC2016-WEPOB47 English 995-997 WEPOB47 ion undulator cryogenics electron simulation Contribution to a conference proceedings 2017 2017-01 http://dx.doi.org/10.18429/JACoW-NAPAC2016-WEPOB47 https://jacow.org/napac2016/papers/wepob47.pdf RadiaBeam Technologies has developed a 7-mm period length cryogenic undulator prototype to test fabrications techniques in cryogenic undulator production. We present here our first prototype, the production techniques used to fabricate it, its magnetic performance at room temperature and the temperature uniformity after cool down.