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TY - CONF AU - Hettrich, R. AU - Bardonner, A. AU - Böhm, R.M. AU - Caspers, F. AU - Dimopoulou, C. AU - Peschke, C. AU - Stuhl, A. AU - Wunderlich, S. ED - Schaa, Volker RW ED - Marx, Michaela ED - Tilmont, Manuel TI - Latest News from Stochastic Cooling Developments for the Collector Ring at FAIR J2 - Proc. of COOL2017, Bonn, Germany, 18-22 September 2017 C1 - Bonn, Germany T2 - Workshop on Beam Cooling and Related Topics T3 - 11 LA - english AB - The CR stochastic cooling system aims at fast 3D cooling of antiprotons, rare isotopes and stable ions. Because of the large apertures and the high gain needed to cool the hot secondary beams, damping within the 1-2 GHz band of the unwanted microwave modes propagating through the vacuum chambers is essential. It will be realised with UHV- compatible, resistively coated ceramic tubes and ferrites. The greatest challenge is increasing the signal to noise ratio for antiproton cooling by means of cryogenic movable (plunging) pickup electrodes, which follow the shrinking beam during cooling and then withdraw fast before the new injection. Linear motor drive units plunge synchroneously the pickup electrodes on both sides of the ion beam (horizontal/vertical). Their technical (mechanical, electrical, controls) concept and specification is summarized. Their performance has been demonstrated in successive measurements inside testing chambers at GSI. Recent simulations of the critical antiproton cooling with the designed system are shown. Longitudinal cooling and its simultaneous transverse cooling are studied with the Fokker-Planck code and with an analytical model, respectively. PB - JACoW CP - Geneva, Switzerland SP - 64 EP - 67 KW - ion KW - damping KW - controls KW - pick-up KW - vacuum DA - 2018/01 PY - 2018 SN - 978-3-95450-198-4 DO - 10.18429/JACoW-COOL2017-TUP16 UR - http://jacow.org/cool2017/papers/tup16.pdf ER -