COOL2015 - List of Authors (Thorndahl, L.)

Paper	Title	Page
MOYAUD04	Stochastic Cooling Developments for the Collector Ring at FAIR	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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FRWAUD03	Design of the Palmer Pickup for Stochastic Pre-Cooling of Hot Rare Isotopes at the CR	175
	D. Barker, C. Dimopoulou, C. Peschke GSI, Darmstadt, Germany L. Thorndahl CERN, Geneva, Switzerland
	We report on the design of a Faltin type pickup for the stochastic pre-cooling of rare isotope beams at 740 MeV/u, using a bandwidth of 1-2 GHz, for the Collector Ring (CR) in the FAIR project at GSI. The design difficulties inherent in Faltin rails at these frequencies are described. Measurements of prototypes and HFSS simulations are compared, to check the simulations, and show good agreement. The pickup impedance and signal output phase with respect to ions traveling at 0.83c are simulated and presented for the final design both with and without the use of damping material, showing the need to damp unwanted modes present in the beam chamber.
	Slides FRWAUD03 [5.257 MB]
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Paper

Title

Page

Stochastic Cooling Developments for the Collector Ring at FAIR

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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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRWAUD03

Design of the Palmer Pickup for Stochastic Pre-Cooling of Hot Rare Isotopes at the CR

175

D. Barker, C. Dimopoulou, C. Peschke
GSI, Darmstadt, Germany
L. Thorndahl
CERN, Geneva, Switzerland

We report on the design of a Faltin type pickup for the stochastic pre-cooling of rare isotope beams at 740 MeV/u, using a bandwidth of 1-2 GHz, for the Collector Ring (CR) in the FAIR project at GSI. The design difficulties inherent in Faltin rails at these frequencies are described. Measurements of prototypes and HFSS simulations are compared, to check the simulations, and show good agreement. The pickup impedance and signal output phase with respect to ions traveling at 0.83c are simulated and presented for the final design both with and without the use of damping material, showing the need to damp unwanted modes present in the beam chamber.

Slides FRWAUD03 [5.257 MB]

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)