IPAC2015 - List of Authors (Semke, L.)

Paper	Title	Page
WEPMA034	Bakeout Concept for the HESR at FAIR	2832
	H. Jagdfeld, N. Bongers, P. Chaumet, F.M. Esser, F. Jordan, F. Klehr, G. Langenberg, U. Pabst, L. Semke FZJ, Jülich, Germany
	Forschungszentrum Jülich has taken the leadership of a consortium being responsible for the design of the High-Energy Storage Ring (HESR) going to be part of the FAIR project at GSI. The HESR is designed for antiprotons but can be used for heavy ion experiments as well. Therefore the vacuum is expected to be 10^-11 mbar or better. To achieve this also in the curved sections where 44 bent dipole magnets with a length of around 4.5 m will be installed, NEG coated dipole chambers will be used to reach the needed pumping speed and capacity. For activation of the NEG-material a bakeout system must be installed. The bakeout concept including the layout of the control system and the systematization of the heater packages for all components of the vacuum system are presented. Also the special design of the heater jackets inside the dipole will be shown where the geometrical parameters are very critical and space is very limited. The results of the simulation of temperature distribution in the dipole iron are compared to temperature measurements carried out at a testbench with different layouts of the heater jackets. The final design of the dipole heater jackets will be illustrated.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPMA034
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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

Bakeout Concept for the HESR at FAIR

2832

H. Jagdfeld, N. Bongers, P. Chaumet, F.M. Esser, F. Jordan, F. Klehr, G. Langenberg, U. Pabst, L. Semke
FZJ, Jülich, Germany

Forschungszentrum Jülich has taken the leadership of a consortium being responsible for the design of the High-Energy Storage Ring (HESR) going to be part of the FAIR project at GSI. The HESR is designed for antiprotons but can be used for heavy ion experiments as well. Therefore the vacuum is expected to be 10^-11 mbar or better. To achieve this also in the curved sections where 44 bent dipole magnets with a length of around 4.5 m will be installed, NEG coated dipole chambers will be used to reach the needed pumping speed and capacity. For activation of the NEG-material a bakeout system must be installed. The bakeout concept including the layout of the control system and the systematization of the heater packages for all components of the vacuum system are presented. Also the special design of the heater jackets inside the dipole will be shown where the geometrical parameters are very critical and space is very limited. The results of the simulation of temperature distribution in the dipole iron are compared to temperature measurements carried out at a testbench with different layouts of the heater jackets. The final design of the dipole heater jackets will be illustrated.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPMA034

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)