TY - CPAPER AU - Scheidt, K.B. TI - Newly Developed 6mm Buttons for the BPMs in the ESRF Low-Emittance-Ring J2 - Proc. of IBIC2014 AB - For the small beam pipe of the BPMs in the LE-ring a development of 6mm button-UHV-feedthroughs was launched and has resulted in the delivery of a total of 27 prototypes from both the Kyocera and the PMB-ALCEN companies. These buttons are flat, without skirt, with a central pin of Molybdenum ending in a male SMA connector. Among these prototype units are versions with Copper, Steel and Molybdenum material for the button itself, with the aim of assessing possible different heatload issues. All design considerations, that are compatible with a further button reduction to 4mm, will be presented next to issues of costs, mechanical tolerances and feasibility. PB - JACoW CY - Geneva, Switzerland SP - 346 EP - 350 KW - coupling KW - factory KW - simulation KW - vacuum KW - operation DA - 2014/10 PY - 2014 SN - 978-3-95450-141-0 UR - http://jacow.org/IBIC2014/papers/tupf14.pdf ER -