COOL2015 - List of Keywords (target)

Paper	Title	Other Keywords	Page
MOYAUD02	Stochastic Cooling of Heavy Ions in the HESR	ion, heavy-ion, pick-up, impedance	15
	R. Stassen, B. Breitkreutz, G. Schug, H. Stockhorst FZJ, Jülich, Germany
	Due to the modularized start version (MSV) of the FAIR project with the postponed NESR, the HESR (High Energy Storage Ring) became very attractive for experiments with heavy ions. Although the HESR is optimized for the storage of antiprotons it is also well suited for heavy-ion beams with slightly changes in the optics. Within the MSV only stochastic cooling and no e-cooling will be available, but even the main 2-4 GHz stochastic cooling system will be capable to fulfill the beam requirements for heavy ions. Most critical parts of the active elements are the high power amplifiers. The stochastic cooling amplifiers for the HESR will be based on new GaN devices. Nonlinearities of these devices necessitate a dedicated analysis for use in stochastic cooling systems.
	Slides MOYAUD02 [5.720 MB]
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MOYAUD03	Stochastic Cooling System for HESR - Theoretical and Simulation Studies	pick-up, kicker, ion, antiproton	20
	H. Stockhorst, B. Lorentz, R. Maier, D. Prasuhn, R. Stassen FZJ, Jülich, Germany T. Katayama Nihon University, Narashino, Chiba, Japan
	The High-Energy Storage Ring (HESR) is part of the upcoming International Facility for Antiproton and Ion Research (FAIR) at GSI in Darmstadt. The HESR dedicates to the field of high-energy antiproton physics to explore the research areas of charmonium spectroscopy, hadronic structure, and quark-gluon dynamics with high-quality beams over a broad momentum range from 1.5 to 15 GeV/c. The facility provides the combination of powerful phase-space cooled antiproton beams and internal Pellet or gas jet targets to achieve the requirements of the experiment PANDA in terms of beam quality and luminosity. Recently, the feasibility of the HESR has been investigated for the application of cooled heavy ion beams with the special emphasis on the experimental program of the SPARC collaboration at FAIR. In this contribution an outline of the Fokker-Planck approach and particle tracking for momentum cooling assisted by a barrier bucket cavity with an internal target is given. A comparison of the filter and filter-less TOF cooling techniques including beam feedback is presented. Simulation and experimental studies at COSY to verify the predictions of the cooling theory complete the contribution.
	Slides MOYAUD03 [4.508 MB]
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THYAUD02	Front End and HFOFO Snake for a Muon Facility	solenoid, factory, proton, collider	150
	D.V. Neuffer, Y.I. Alexahin Fermilab, Batavia, Illinois, USA
	Funding: Work supported by Contract No. De-AC02-07CH11359 with the U. S. Department of Energy A neutrino factory or muon collider requires the capture and cooling of a large number of muons. Scenarios for capture, bunching, phase-energy rotation and initial cooling of muonss produced from a proton source target have been developed for neutrino factory and Muon Collider designs. The baseline scenarios requires a drift section from the target, a bunching section and a phase-energy rotation section leading into the cooling channel. The currently preferred cooling channel design is an 'HFOFO Snake' configuration that cools both μ+ and μ- transversely and longitudinally. The status of the design is presented and variations are discussed.
	Slides THYAUD02 [4.191 MB]
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Paper

Title

Other Keywords

Page

MOYAUD02

Stochastic Cooling of Heavy Ions in the HESR

ion, heavy-ion, pick-up, impedance

15

R. Stassen, B. Breitkreutz, G. Schug, H. Stockhorst
FZJ, Jülich, Germany

Due to the modularized start version (MSV) of the FAIR project with the postponed NESR, the HESR (High Energy Storage Ring) became very attractive for experiments with heavy ions. Although the HESR is optimized for the storage of antiprotons it is also well suited for heavy-ion beams with slightly changes in the optics. Within the MSV only stochastic cooling and no e-cooling will be available, but even the main 2-4 GHz stochastic cooling system will be capable to fulfill the beam requirements for heavy ions. Most critical parts of the active elements are the high power amplifiers. The stochastic cooling amplifiers for the HESR will be based on new GaN devices. Nonlinearities of these devices necessitate a dedicated analysis for use in stochastic cooling systems.

Slides MOYAUD02 [5.720 MB]

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

MOYAUD03

Stochastic Cooling System for HESR - Theoretical and Simulation Studies

pick-up, kicker, ion, antiproton

20

H. Stockhorst, B. Lorentz, R. Maier, D. Prasuhn, R. Stassen
FZJ, Jülich, Germany
T. Katayama
Nihon University, Narashino, Chiba, Japan

The High-Energy Storage Ring (HESR) is part of the upcoming International Facility for Antiproton and Ion Research (FAIR) at GSI in Darmstadt. The HESR dedicates to the field of high-energy antiproton physics to explore the research areas of charmonium spectroscopy, hadronic structure, and quark-gluon dynamics with high-quality beams over a broad momentum range from 1.5 to 15 GeV/c. The facility provides the combination of powerful phase-space cooled antiproton beams and internal Pellet or gas jet targets to achieve the requirements of the experiment PANDA in terms of beam quality and luminosity. Recently, the feasibility of the HESR has been investigated for the application of cooled heavy ion beams with the special emphasis on the experimental program of the SPARC collaboration at FAIR. In this contribution an outline of the Fokker-Planck approach and particle tracking for momentum cooling assisted by a barrier bucket cavity with an internal target is given. A comparison of the filter and filter-less TOF cooling techniques including beam feedback is presented. Simulation and experimental studies at COSY to verify the predictions of the cooling theory complete the contribution.

Slides MOYAUD03 [4.508 MB]

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

THYAUD02

Front End and HFOFO Snake for a Muon Facility

solenoid, factory, proton, collider

150

D.V. Neuffer, Y.I. Alexahin
Fermilab, Batavia, Illinois, USA

Funding: Work supported by Contract No. De-AC02-07CH11359 with the U. S. Department of Energy
A neutrino factory or muon collider requires the capture and cooling of a large number of muons. Scenarios for capture, bunching, phase-energy rotation and initial cooling of muonss produced from a proton source target have been developed for neutrino factory and Muon Collider designs. The baseline scenarios requires a drift section from the target, a bunching section and a phase-energy rotation section leading into the cooling channel. The currently preferred cooling channel design is an 'HFOFO Snake' configuration that cools both μ+ and μ- transversely and longitudinally. The status of the design is presented and variations are discussed.

Slides THYAUD02 [4.191 MB]

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