IPAC2015 - List of Authors (Stockhorst, H.)

Paper	Title	Page
THPF030	Antiproton Acceleration and Deceleration in the HESR	3758
	B. Lorentz, T. Katayama, A. Lehrach, R. Maier, D. Prasuhn, R. Stassen, H. Stockhorst, R. Tölle FZJ, Jülich, Germany
	The High Energy Storage Ring (HESR) is a part of the future Facility for Antiproton and Ion Research (FAIR) in Darmstadt. The ring is used for hadron physics experiments with a pellet target and the PANDA detector, and will supply antiprotons of momenta from 1.5 GeV/c to 15 GeV/c. To cover the whole energy range a flexible adjustment of transition energy and the corresponding gamma-t value is foreseen. For Injection and Accumulation of Antiprotons delivered from the CR at a momentum of 3.8 GeV/c (gamma=4.2), the HESR optics will be tuned to gamma-t=6.2. For deceleration down to a momentum of 1.5 GeV/c this optic is suitable as well. Stochastic cooling at an intermediate energy is required to avoid beam losses caused by adiabatic growth of the beam during deceleration. For acceleration to 8 GeV/c (gamma=8.6) the optics will be changed after accumulation of the antiproton beam to gamma-t=14.6. For momenta higher than 8 GeV/c the beam will be debunched at 8 GeV/c, optics will be changed to gamma-t=6.2, and after adiabatic rebunching the beam will be accelerated to 15 GeV/c (gamma=16). Simulations show the feasibility of the described procedures with practically no beam losses.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF030
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPF034	Injection Kicker for HESR at FAIR using Semi-Conductor Switches	3770
	R. Tölle, N. Bongers, F.M. Esser, R. Gebel, S. Hamzic, H. Jagdfeld, F. Klehr, B. Laatsch, L. Reifferscheidt, M. Retzlaff, L. Semke, H. Soltner, H. Stockhorst FZJ, Jülich, Germany S. Antoine, W. Beeckman, P. Bocher, O. Cosson, P. Jivkov, D. Ramauge Sigmaphi, Vannes, France
	The High Energy Storage Ring for Antiprotons is going to be built at FAIR in Darmstadt on the extended GSI campus. It will receive the antiprotons via the Collector Ring (CR). Using a barrier bucket, the circulating particles will be compressed into one half of the circumference. New particles have to be injected into the remaining half. Thus rise and fall time must not exceed 220 ns each with a flat top of 500 ns. A kick angle of 6.4 mrad is required at 13 Tm magnetic rigidity. The system must allow pole reversal for injection of positively charged particles. With a voltage lower than 40 kV a semi-conductor based pulser is going to be realized. Boundary conditions and the status of preparatory work are described. Simulation results and available measurements are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF034
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Antiproton Acceleration and Deceleration in the HESR

3758

B. Lorentz, T. Katayama, A. Lehrach, R. Maier, D. Prasuhn, R. Stassen, H. Stockhorst, R. Tölle
FZJ, Jülich, Germany

The High Energy Storage Ring (HESR) is a part of the future Facility for Antiproton and Ion Research (FAIR) in Darmstadt. The ring is used for hadron physics experiments with a pellet target and the PANDA detector, and will supply antiprotons of momenta from 1.5 GeV/c to 15 GeV/c. To cover the whole energy range a flexible adjustment of transition energy and the corresponding gamma-t value is foreseen. For Injection and Accumulation of Antiprotons delivered from the CR at a momentum of 3.8 GeV/c (gamma=4.2), the HESR optics will be tuned to gamma-t=6.2. For deceleration down to a momentum of 1.5 GeV/c this optic is suitable as well. Stochastic cooling at an intermediate energy is required to avoid beam losses caused by adiabatic growth of the beam during deceleration. For acceleration to 8 GeV/c (gamma=8.6) the optics will be changed after accumulation of the antiproton beam to gamma-t=14.6. For momenta higher than 8 GeV/c the beam will be debunched at 8 GeV/c, optics will be changed to gamma-t=6.2, and after adiabatic rebunching the beam will be accelerated to 15 GeV/c (gamma=16). Simulations show the feasibility of the described procedures with practically no beam losses.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF030

Export •

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

THPF034

Injection Kicker for HESR at FAIR using Semi-Conductor Switches

3770

R. Tölle, N. Bongers, F.M. Esser, R. Gebel, S. Hamzic, H. Jagdfeld, F. Klehr, B. Laatsch, L. Reifferscheidt, M. Retzlaff, L. Semke, H. Soltner, H. Stockhorst
FZJ, Jülich, Germany
S. Antoine, W. Beeckman, P. Bocher, O. Cosson, P. Jivkov, D. Ramauge
Sigmaphi, Vannes, France

The High Energy Storage Ring for Antiprotons is going to be built at FAIR in Darmstadt on the extended GSI campus. It will receive the antiprotons via the Collector Ring (CR). Using a barrier bucket, the circulating particles will be compressed into one half of the circumference. New particles have to be injected into the remaining half. Thus rise and fall time must not exceed 220 ns each with a flat top of 500 ns. A kick angle of 6.4 mrad is required at 13 Tm magnetic rigidity. The system must allow pole reversal for injection of positively charged particles. With a voltage lower than 40 kV a semi-conductor based pulser is going to be realized. Boundary conditions and the status of preparatory work are described. Simulation results and available measurements are presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF034

Export •

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