IPAC2015 - List of Authors (Spiller, P.J.)

Paper	Title	Page
TUBB2	The Accelerator Facility of the Facility for Antiproton and Ion Research	1343
	P.J. Spiller, F. Becker, A. Dolinskyy, L. Groening, O.K. Kester, K. Knie, H. Reich-Sprenger, W. Vinzenz, M. Winkler GSI, Darmstadt, Germany D. Prasuhn FZJ, Jülich, Germany
	The accelerators of the Facility for Antiproton and Ion Research – FAIR are under construction. The sophisticated system of accelerators is designed to produce stable and secondary beams with a significant variety of intensities and beam energies. FAIR will explore the intensity frontier of heavy ion accelerators and the beams for the experiments will have highest beam quality for cutting edge physics to be conducted. The main driver accelerator of FAIR will be the SIS100 synchrotron. In order to produce the intense rare isotope beams (RIB) at FAIR, a unique superconducting fragment separator is under construction. A system of storage rings will collect and cool secondary particles from the FAIR. Intense work on test infrastructure for the huge number of superconducting magnets of the FAIR machines is ongoing at GSI and several partner labs. In addition, the GSI accelerator facility is being prepared to serve as injector for the FAIR accelerators. As the construction of the FAIR accelerators and the procurement has started, an overview of the designs, procurements plans and infrastructure preparation can be provided.
	Slides TUBB2 [4.653 MB]
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WEXC3	Improving the Energy Efficiency of Accelerator Facilities	2428
	M. Seidel PSI, Villigen PSI, Switzerland R. Gehring KIT, Karlsruhe, Germany E. Jensen CERN, Geneva, Switzerland T.I. Parker ESS, Lund, Sweden P.J. Spiller, J. Stadlmann GSI, Darmstadt, Germany
	New particle accelerator based research facilities tend to be much more productive, but often in coincidence with much higher energy consumption. The total energy consumption of mankind is steeply rising, while some European countries decided to terminate nuclear power generation and to switch to renewable energy production. Also the CO2 problem gives rise to new approaches for energy production and in all strategies the efficiency of utilization of electrical energy plays an important role. For the public acceptance of particle accelerator projects it is thus very important to optimize them for best utilization of electrical energy and to show these efforts to funding bodies and to the public. Within the European accelerator development program Eucard-2 we organise a network EnEfficient that aims at improving the energy efficiency of accelerators. In this paper we give some background information on the political situation, we describe the power flow in accelerator facilities and we give examples for developments of efficient accelerator systems, such as magnets, RF generation and beam acceleration, heat recovery and energy management.
	Slides WEXC3 [2.611 MB]
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WEPMA020	SIS100 Dipole Field Harmonics and Dynamic Aperture Calculations	2795
	C. Omet, E.S. Fischer, G. Franchetti, V. Kornilov, A. Mierau, C. Roux, P. Schnizer, D. Schäfer, S. Sorge, P.J. Spiller, K. Sugita GSI, Darmstadt, Germany
	During the acceptance test of the First of Series (FoS) SIS100 super-ferric dipole, detailed field measurements have been done. The harmonic coefficients have been extracted from these and dynamic aperture simulations have been done which are presented here. Furthermore, geometric precision measurement tools for the magnet have been developed to track down the field errors to geometric errors. Finally, mitigation actions have been taken to reduce these errors during manufacturing to ensure the design beam survival rate in SIS100.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPMA020
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WEPMA021	Efficient Pulsed Quadrupole	2799
	I.J. Petzenhauser, U. Blell, P.J. Spiller GSI, Darmstadt, Germany C. Tenholt IAP, Frankfurt am Main, Germany
	Funding: Work supported by EuCARD-2-WP03-EnEfficient. EuCARD-2 is co-funded by the partners and the European Commission under Capacities 7th Framework Programme, Grant Agreement 312453 In order to raise the focusing gradient in case of bunched beam lines, an alternative, iron free, pulsed quadrupole was designed. The transfer channels between synchrotrons as well as the final focusing for the production of secondary beams are possible applications. The quadrupole is running in a pulsed mode, which means an immense saving of energy by avoiding standby operation. Still the high gradients demand high currents. Hence a circuit had to be developed which is able to recover a significant amount of the pulsing energy for following shots. The basic design of the electrical circuit of the pulsed quadrupole is introduced. Furthermore more energy efficient circuits are presented and the limits of adaptability are considered.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPMA021
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THPF009	Pumping Properties of Cryogenic Surfaces in SIS100	3696
	L.H.J. Bozyk, O.K. Kester, P.J. Spiller GSI, Darmstadt, Germany F. Chill, O.K. Kester IAP, Frankfurt am Main, Germany
	Funding: Work supported by Hic4Fair and BMBF (FKZ:05P12RDRBK). The synchrotron SIS100 of the planned FAIR facility will provide heavy ion beams of highest intensities. The required low charge states are subject to enhanced charge exchange processes in collisions with residual gas molecules. Therefore, highest vacuum quality is crucial for a reliable operation and minimal beam loss. The generation of the required low gas densities relies on the pumping capabilities of the cryogenic beam pipe walls. Most typical gas components in ultra high vacuum are bound by cryocondensation at LHe temperatures, resulting in ultimate low pressures with almost infinite pumping capacity. Hydrogen can not be crycondensated to acceptable low pressures. But if the surface coverage is sufficiently low, it can get bound by cryoadsorption. The pumping capabilities of cryogenic walls for Hydrogen have been investigated for SIS100-like conditions. The measurement results have been used in dynamic vacuum simulations at heavy ion operation. The simulation results are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF009
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THPF010	Simulation and Experimental Investigation of Heavy Ion Induced Desorption from Cryogenic Targets	3699
	Ch. Maurer, D.H.H. Hoffmann TU Darmstadt, Darmstadt, Germany L.H.J. Bozyk, H. Kollmus, Ch. Maurer, P.J. Spiller GSI, Darmstadt, Germany
	Funding: Bundesministerium für Bildung und Forschung FKZ 06DA7031 Heavy-ion impact induced gas desorption is the key process that drives beam intensity limiting dynamic vacuum losses. Minimizing this effect, by providing low desorption yield surfaces, is an important issue for maintaining a stable ultra high vacuum during operation with medium charge state heavy ions. For room temperature targets, investigation shows a scaling of the desorption yield with the beam's near-surface electronic energy loss, i.e. a decrease with increasing energy,. An optimized material for a room temperature ion-catcher has been found. But for the planned superconducting heavy-ion synchrotron SIS100 at the FAIR accelerator complex, the ion catcher system has to work in a cryogenic environment. Desorption measurements with the prototype cryocatcher for SIS100 showed an unexpected energy scaling*, which needs to be explained. Understanding this scaling might lead to a better suited choice of material, resulting in a lower desorption yield. Here, new experimental results will be presented along with insights gained from gas dynamics simulations. H. Kollmus et al., AIP Conf. Proc. 773, 207 (2005)) E. Mahner et al., Phys. Rev. ST Accel. Beams 14, 050102 (2011) * L.H.J. Bozyk, H. Kollmus, P.J. Spiller, Proc. of IPAC 2012, p. 3239
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF010
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THPF012	Status of the High Energy Beam Transport System for FAIR	3705
	F. Hagenbuck, L.H.J. Bozyk, S. Damjanovic, A. Krämer, B. Merk, C. Mühle, S. Ratschow, B.R. Schlei, P.J. Spiller, B. Walasek-Höhne, H. Welker, C. Will GSI, Darmstadt, Germany
	The overall layout of the High Energy Beam Transport (HEBT) System of the Facility for Antiproton and Ion Research (FAIR)* did not change since its last presentation in 2008. All necessitated adaptions as for example due to the introduction of the Modularized Start Version (MSV, module 0-3) of FAIR* could be smoothly implemented. In the meanwhile the HEBT system is in its realisation phase with the procurement of its main components in progress. In the following adaptions of the system layout not yet covered in ** are summarized and an overview of the technical system design and procurement status are presented. * FAIR Baseline Technical Report (FBTR), GSI 2006 S. Ratschow et al., Proc. of EPAC08, THPP104, Genoa, Italy (2008) *FAIR Green Paper - The Modularized Start Version, October 2009
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF012
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THPF015	Status of the FAIR Heavy Ion Synchrotron Project SIS100	3715
	P.J. Spiller, U. Blell, L.H.J. Bozyk, J. Ceballos Velasco, T. Eisel, E.S. Fischer, O.K. Kester, H.G. König, H. Kollmus, V. Kornilov, P. Kowina, J.P. Meier, A. Mierau, C. Mühle, C. Omet, D. Ondreka, N. Pyka, H.R. Ramakers, P. Rottländer, C. Roux, P. Schnizer, St. Wilfert GSI, Darmstadt, Germany
	The procurements of major technical components for the heavy ion synchrotron SIS100 are progressing. Especially the production of the long lead items, the main superconducting dipole and quadrupole magnets and the main Rf systems could be started. The system layout for the injection system and the specifications for all injection devices has been completed. In parallel, the Digital Mock-Up (DMU) and design for major extraction components has been developed. Certain technical challenges observed during the acceptance tests of First of Series (FOS) components and risks and their mitigation will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF015
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Paper

Title

Page

The Accelerator Facility of the Facility for Antiproton and Ion Research

1343

P.J. Spiller, F. Becker, A. Dolinskyy, L. Groening, O.K. Kester, K. Knie, H. Reich-Sprenger, W. Vinzenz, M. Winkler
GSI, Darmstadt, Germany
D. Prasuhn
FZJ, Jülich, Germany

The accelerators of the Facility for Antiproton and Ion Research – FAIR are under construction. The sophisticated system of accelerators is designed to produce stable and secondary beams with a significant variety of intensities and beam energies. FAIR will explore the intensity frontier of heavy ion accelerators and the beams for the experiments will have highest beam quality for cutting edge physics to be conducted. The main driver accelerator of FAIR will be the SIS100 synchrotron. In order to produce the intense rare isotope beams (RIB) at FAIR, a unique superconducting fragment separator is under construction. A system of storage rings will collect and cool secondary particles from the FAIR. Intense work on test infrastructure for the huge number of superconducting magnets of the FAIR machines is ongoing at GSI and several partner labs. In addition, the GSI accelerator facility is being prepared to serve as injector for the FAIR accelerators. As the construction of the FAIR accelerators and the procurement has started, an overview of the designs, procurements plans and infrastructure preparation can be provided.

Slides TUBB2 [4.653 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUBB2

Export •

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WEXC3

Improving the Energy Efficiency of Accelerator Facilities

2428

M. Seidel
PSI, Villigen PSI, Switzerland
R. Gehring
KIT, Karlsruhe, Germany
E. Jensen
CERN, Geneva, Switzerland
T.I. Parker
ESS, Lund, Sweden
P.J. Spiller, J. Stadlmann
GSI, Darmstadt, Germany

New particle accelerator based research facilities tend to be much more productive, but often in coincidence with much higher energy consumption. The total energy consumption of mankind is steeply rising, while some European countries decided to terminate nuclear power generation and to switch to renewable energy production. Also the CO2 problem gives rise to new approaches for energy production and in all strategies the efficiency of utilization of electrical energy plays an important role. For the public acceptance of particle accelerator projects it is thus very important to optimize them for best utilization of electrical energy and to show these efforts to funding bodies and to the public. Within the European accelerator development program Eucard-2 we organise a network EnEfficient that aims at improving the energy efficiency of accelerators. In this paper we give some background information on the political situation, we describe the power flow in accelerator facilities and we give examples for developments of efficient accelerator systems, such as magnets, RF generation and beam acceleration, heat recovery and energy management.

Slides WEXC3 [2.611 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEXC3

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WEPMA020

SIS100 Dipole Field Harmonics and Dynamic Aperture Calculations

2795

C. Omet, E.S. Fischer, G. Franchetti, V. Kornilov, A. Mierau, C. Roux, P. Schnizer, D. Schäfer, S. Sorge, P.J. Spiller, K. Sugita
GSI, Darmstadt, Germany

During the acceptance test of the First of Series (FoS) SIS100 super-ferric dipole, detailed field measurements have been done. The harmonic coefficients have been extracted from these and dynamic aperture simulations have been done which are presented here. Furthermore, geometric precision measurement tools for the magnet have been developed to track down the field errors to geometric errors. Finally, mitigation actions have been taken to reduce these errors during manufacturing to ensure the design beam survival rate in SIS100.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPMA020

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WEPMA021

Efficient Pulsed Quadrupole

2799

I.J. Petzenhauser, U. Blell, P.J. Spiller
GSI, Darmstadt, Germany
C. Tenholt
IAP, Frankfurt am Main, Germany

Funding: Work supported by EuCARD-2-WP03-EnEfficient. EuCARD-2 is co-funded by the partners and the European Commission under Capacities 7th Framework Programme, Grant Agreement 312453
In order to raise the focusing gradient in case of bunched beam lines, an alternative, iron free, pulsed quadrupole was designed. The transfer channels between synchrotrons as well as the final focusing for the production of secondary beams are possible applications. The quadrupole is running in a pulsed mode, which means an immense saving of energy by avoiding standby operation. Still the high gradients demand high currents. Hence a circuit had to be developed which is able to recover a significant amount of the pulsing energy for following shots. The basic design of the electrical circuit of the pulsed quadrupole is introduced. Furthermore more energy efficient circuits are presented and the limits of adaptability are considered.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPMA021

Export •

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

THPF009

Pumping Properties of Cryogenic Surfaces in SIS100

3696

L.H.J. Bozyk, O.K. Kester, P.J. Spiller
GSI, Darmstadt, Germany
F. Chill, O.K. Kester
IAP, Frankfurt am Main, Germany

Funding: Work supported by Hic4Fair and BMBF (FKZ:05P12RDRBK).
The synchrotron SIS100 of the planned FAIR facility will provide heavy ion beams of highest intensities. The required low charge states are subject to enhanced charge exchange processes in collisions with residual gas molecules. Therefore, highest vacuum quality is crucial for a reliable operation and minimal beam loss. The generation of the required low gas densities relies on the pumping capabilities of the cryogenic beam pipe walls. Most typical gas components in ultra high vacuum are bound by cryocondensation at LHe temperatures, resulting in ultimate low pressures with almost infinite pumping capacity. Hydrogen can not be crycondensated to acceptable low pressures. But if the surface coverage is sufficiently low, it can get bound by cryoadsorption. The pumping capabilities of cryogenic walls for Hydrogen have been investigated for SIS100-like conditions. The measurement results have been used in dynamic vacuum simulations at heavy ion operation. The simulation results are presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF009

Export •

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

THPF010

Simulation and Experimental Investigation of Heavy Ion Induced Desorption from Cryogenic Targets

3699

Ch. Maurer, D.H.H. Hoffmann
TU Darmstadt, Darmstadt, Germany
L.H.J. Bozyk, H. Kollmus, Ch. Maurer, P.J. Spiller
GSI, Darmstadt, Germany

Funding: Bundesministerium für Bildung und Forschung FKZ 06DA7031
Heavy-ion impact induced gas desorption is the key process that drives beam intensity limiting dynamic vacuum losses. Minimizing this effect, by providing low desorption yield surfaces, is an important issue for maintaining a stable ultra high vacuum during operation with medium charge state heavy ions. For room temperature targets, investigation shows a scaling of the desorption yield with the beam's near-surface electronic energy loss, i.e. a decrease with increasing energy*,**. An optimized material for a room temperature ion-catcher has been found. But for the planned superconducting heavy-ion synchrotron SIS100 at the FAIR accelerator complex, the ion catcher system has to work in a cryogenic environment. Desorption measurements with the prototype cryocatcher for SIS100 showed an unexpected energy scaling***, which needs to be explained. Understanding this scaling might lead to a better suited choice of material, resulting in a lower desorption yield. Here, new experimental results will be presented along with insights gained from gas dynamics simulations.
* H. Kollmus et al., AIP Conf. Proc. 773, 207 (2005))
** E. Mahner et al., Phys. Rev. ST Accel. Beams 14, 050102 (2011)
*** L.H.J. Bozyk, H. Kollmus, P.J. Spiller, Proc. of IPAC 2012, p. 3239

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF010

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THPF012

Status of the High Energy Beam Transport System for FAIR

3705

F. Hagenbuck, L.H.J. Bozyk, S. Damjanovic, A. Krämer, B. Merk, C. Mühle, S. Ratschow, B.R. Schlei, P.J. Spiller, B. Walasek-Höhne, H. Welker, C. Will
GSI, Darmstadt, Germany

The overall layout of the High Energy Beam Transport (HEBT) System of the Facility for Antiproton and Ion Research (FAIR)* did not change since its last presentation in 2008**. All necessitated adaptions as for example due to the introduction of the Modularized Start Version (MSV, module 0-3) of FAIR*** could be smoothly implemented. In the meanwhile the HEBT system is in its realisation phase with the procurement of its main components in progress. In the following adaptions of the system layout not yet covered in ** are summarized and an overview of the technical system design and procurement status are presented.
* FAIR Baseline Technical Report (FBTR), GSI 2006
** S. Ratschow et al., Proc. of EPAC08, THPP104, Genoa, Italy (2008)
***FAIR Green Paper - The Modularized Start Version, October 2009

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF012

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

THPF015

Status of the FAIR Heavy Ion Synchrotron Project SIS100

3715

P.J. Spiller, U. Blell, L.H.J. Bozyk, J. Ceballos Velasco, T. Eisel, E.S. Fischer, O.K. Kester, H.G. König, H. Kollmus, V. Kornilov, P. Kowina, J.P. Meier, A. Mierau, C. Mühle, C. Omet, D. Ondreka, N. Pyka, H.R. Ramakers, P. Rottländer, C. Roux, P. Schnizer, St. Wilfert
GSI, Darmstadt, Germany

The procurements of major technical components for the heavy ion synchrotron SIS100 are progressing. Especially the production of the long lead items, the main superconducting dipole and quadrupole magnets and the main Rf systems could be started. The system layout for the injection system and the specifications for all injection devices has been completed. In parallel, the Digital Mock-Up (DMU) and design for major extraction components has been developed. Certain technical challenges observed during the acceptance tests of First of Series (FOS) components and risks and their mitigation will be presented.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF015

Export •

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