Keyword: cryogenics
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MOYAUD04 Stochastic Cooling Developments for the Collector Ring at FAIR pick-up, antiproton, kicker, ion 25
 
  • C. Dimopoulou, D. Barker, R.M. Böhm, R. Hettrich, W. Maier, C. Peschke, A. Stuhl, S. Wunderlich
    GSI, Darmstadt, Germany
  • L. Thorndahl
    CERN, Geneva, Switzerland
 
  A Status report on the ongoing developments for the demanding stochastic cooling system of the Collector Ring is given. The system operates in the frequency band 1-2 GHz, it has to provide fast 3D cooling of antiproton, rare isotope and stable heavy ion beams. The main challenges are (i) the cooling of antiprotons by means of cryogenic movable pick-up electrodes and (ii) the fast two-stage cooling (pre-cooling by the Palmer method, followed by the notch filter method) of the hot rare isotope beams. Progress in designing, testing and integrating the hardware is discussed.  
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FRXAUD02 Lepta - the Facility for Fundamental and Applied Research positron, vacuum, electron, resonance 179
 
  • A.G. Kobets, E.V. Ahmanova, P. Horodek, I.N. Meshkov, O. Orlov, A.A. Sidorin
    JINR, Dubna, Moscow Region, Russia
  • M.K. Eseev
    NAFU, Arkhangelsk, Russia
 
  The project of the Low Energy Positron Toroidal Accumulator (LEPTA) is under development at JINR. The LEPTA facility is a small positron storage ring equipped with the electron cooling system. The project positron energy is of 2 ' 10 keV. The main goal of the facility is to generate an intense flux of positronium atoms ' the bound state of electron and positron. Storage ring of LEPTA facility was commissioned in September 2004 and is under development up to now. The positron injector has been constructed in 2005 / 2010, and beam transfer channel ' in 2011. By the end of August 2011 the experiments on injection into the ring of electrons and positrons stored in the trap were carried out. In 2012 - 2015, the LEPTA trap optimization and new experiments on accumulation of electrons and positrons in the trap has been performed. Furthermore new cooler for positrons source has been designed and manufactured, its assembling is in progress. The recent results are presented here.  
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