COOL2023 - List of Authors (Dimopoulou, C.)

Paper	Title	Page
THPOSRP20	Beam Measurements of a Palmer Pick-up for the Collector Ring of FAIR	95
	C. Peschke, R.M. Böhm, C. Dimopoulou, S. Wunderlich, C. Zhang GSI, Darmstadt, Germany
	The stochastic cooling system of the Collector Ring (CR) of the future FAIR facility will have three pick-up tanks and two kicker tanks. For the pre-cooling of very hot RIBs, a pick-up tank with eight Faltin-type structures for Palmer-cooling has been constructed by GSI. The structures have been designed using High-Frequency Structure Simulator (HFSS). The Palmer PU tank has been tested with β = 0.83 proton beams at the COoler SYnchrotron (COSY) of the FZJ. This publication will present the results of measurements with beam and compare them with simulations (HFSS and Microwave Studio). The pick-up operates at room temperature. But it has artificial cold loads instead of normal terminators. The results of the noise temperature measurements will also be presented.
	Poster THPOSRP20 [2.699 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-COOL2023-THPOSRP20
About •	Received ※ 06 October 2023 — Revised ※ 11 October 2023 — Accepted ※ 12 October 2023 — Issued ※ 02 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRPAM1R1	Electron Cooling of Low-Energy Ion Beams in CRYRING@ESR
	C. Krantz, Z. Andelkovic, C. Dimopoulou, S. Fedotova, W. Geithner, F. Herfurth, R. Hess, M. Lestinsky, E. Menz, K. Mohr, A. Reiter, J. Roßbach, R.M. Sanchez Alarcon, G. Vorobyev GSI, Darmstadt, Germany K. Mohr, W. Nörtershäuser TU Darmstadt, Darmstadt, Germany
	Within the CRYRING@ESR project, the heavy-ion storage ring CRYRING has been transferred from Stockholm to Darmstadt. It complements the Experimental Storage Ring (ESR) of GSI/FAIR by a machine optimized for low ion energies. CRYRING@ESR can store the full spectrum of highly-charged heavy ions available from the UNILAC/SIS18 accelerator chain after deceleration in ESR, with the option to decelerate even further in CRYRING itself. Electron cooling in both rings is an essential part of beam preparation at CRYRING@ESR. In a complementary stand-alone mode, CRYRING@ESR can operate with ions in low charge states, injected from an independent low-energy linac. This extends the experimental possibilities available at GSI/FAIR, but comes with new challenges with respect to electron cooling. Singly- or weakly-charged ions are often limited to very low storage velocities, capped by the maximum rigidity of the bending magnets. With ions that slow, interaction of the electron space-charge with the dispersive ring optics can easily lead to instabilities in the cooled beam. We present and discuss our experience with low-energy electron cooling from the first years of CRYRING@ESR operation.
	Slides FRPAM1R1 [4.018 MB]
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Paper

Title

Page

Beam Measurements of a Palmer Pick-up for the Collector Ring of FAIR

95

C. Peschke, R.M. Böhm, C. Dimopoulou, S. Wunderlich, C. Zhang
GSI, Darmstadt, Germany

The stochastic cooling system of the Collector Ring (CR) of the future FAIR facility will have three pick-up tanks and two kicker tanks. For the pre-cooling of very hot RIBs, a pick-up tank with eight Faltin-type structures for Palmer-cooling has been constructed by GSI. The structures have been designed using High-Frequency Structure Simulator (HFSS). The Palmer PU tank has been tested with β = 0.83 proton beams at the COoler SYnchrotron (COSY) of the FZJ. This publication will present the results of measurements with beam and compare them with simulations (HFSS and Microwave Studio). The pick-up operates at room temperature. But it has artificial cold loads instead of normal terminators. The results of the noise temperature measurements will also be presented.

Poster THPOSRP20 [2.699 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-COOL2023-THPOSRP20

About •

Received ※ 06 October 2023 — Revised ※ 11 October 2023 — Accepted ※ 12 October 2023 — Issued ※ 02 December 2023

Cite •

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

FRPAM1R1

Electron Cooling of Low-Energy Ion Beams in CRYRING@ESR

C. Krantz, Z. Andelkovic, C. Dimopoulou, S. Fedotova, W. Geithner, F. Herfurth, R. Hess, M. Lestinsky, E. Menz, K. Mohr, A. Reiter, J. Roßbach, R.M. Sanchez Alarcon, G. Vorobyev
GSI, Darmstadt, Germany
K. Mohr, W. Nörtershäuser
TU Darmstadt, Darmstadt, Germany

Within the CRYRING@ESR project, the heavy-ion storage ring CRYRING has been transferred from Stockholm to Darmstadt. It complements the Experimental Storage Ring (ESR) of GSI/FAIR by a machine optimized for low ion energies. CRYRING@ESR can store the full spectrum of highly-charged heavy ions available from the UNILAC/SIS18 accelerator chain after deceleration in ESR, with the option to decelerate even further in CRYRING itself. Electron cooling in both rings is an essential part of beam preparation at CRYRING@ESR. In a complementary stand-alone mode, CRYRING@ESR can operate with ions in low charge states, injected from an independent low-energy linac. This extends the experimental possibilities available at GSI/FAIR, but comes with new challenges with respect to electron cooling. Singly- or weakly-charged ions are often limited to very low storage velocities, capped by the maximum rigidity of the bending magnets. With ions that slow, interaction of the electron space-charge with the dispersive ring optics can easily lead to instabilities in the cooled beam. We present and discuss our experience with low-energy electron cooling from the first years of CRYRING@ESR operation.

Slides FRPAM1R1 [4.018 MB]

Cite •

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