IPAC2015 - List of Authors (Abelleira, J.L.)

Paper	Title	Page
TUPTY039	LHC Transfer Lines and Injection Tests for Run 2	2098
	C. Bracco, J.L. Abelleira, R. Alemany-Fernández, M.J. Barnes, W. Bartmann, E. Carlier, L.N. Drøsdal, M.A. Fraser, K. Fuchsberger, B. Goddard, J. Jentzsch, V. Kain, N. Magnin, M. Meddahi, J.S. Schmidt, L.S. Stoel, J.A. Uythoven, F.M. Velotti, J. Wenninger CERN, Geneva, Switzerland
	The transfer lines for both rings of the LHC were successfully re-commissioned with beam in preparation for the start-up of Run 2. This paper presents an overview of the transfer line and sector tests performed to bring the LHC back into operation after a two-year period of shutdown for consolidation and upgrade. The tests enabled the debugging of critical software and hardware systems and validated changes made to the transfer and injection systems. The beam-based measurements carried out to validate the optics and machine configuration are summarised along with the performance of the hardware systems.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPTY039
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THPF082	Considerations on the Fast Pulsed Magnet Systems for the 2 GeV Beam Transfer from the CERN PSB to PS	3876
	T. Kramer, J.L. Abelleira, W. Bartmann, J. Borburgh, L. Ducimetière, L.M.C. Feliciano, B. Goddard, L. Sermeus CERN, Geneva, Switzerland
	Within the scope of the LIU project the CERN PS Booster to PS beam transfer will be modified to match the requirements for the future 2 GeV proton beam energy upgrade. The paper describes considerations on the PSB extraction and recombination kickers as well as on the injection kicker(s) into the PS. Different schemes of an injection into the PS have been outlined in the past and are reviewed under the aspect of individual transfer kicker rise and fall time performances. Recent measurements on the recombination kickers are presented and subsequently homogenous rise and fall time requirements in the whole PSB to PS transfer chain are presented. The baseline option for the PS injection kicker(s) is outlined and compared to the previously presented concepts.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF082
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THPF083	Painting Schemes for CERN PS Booster H⁻ Injection	3879
	J.L. Abelleira, W. Bartmann, E. Benedetto, C. Bracco, G.P. Di Giovanni, V. Forte, M. Kowalska, M. Meddahi, B. Mikulec, G. Rumolo CERN, Geneva, Switzerland V. Forte Université Blaise Pascal, Clermont-Ferrand, France M. Kowalska EPFL, Lausanne, Switzerland
	The present 50-MeV proton injection into the PS Booster will be replaced by a H⁻ charge exchange injection at 160 MeV to be provided by Linac 4. The higher energy will allow producing beams at higher brightness. A set of kicker magnets (KSW) will move the beam across the stripping foil to perform phase space painting in the horizontal plane to reduce space charge effects. The PSB must satisfy the different users with very different beams in terms of emittance and intensity. Therefore, the KSW waveforms must be adapted for each case to meet the beam characteristics while minimizing beam losses. Here we present the results of the simulations performed to optimise the injection system. A detailed analysis of the different painting schemes is discussed, including the effect of the working point on the painted beam, and variations in the offset of the injected beam.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF083
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THPF088	CERN PS Booster Upgrade and LHC Beams Emittance	3897
	E. Benedetto, J.L. Abelleira, C. Bracco, V. Forte, B. Mikulec, G. Rumolo CERN, Geneva, Switzerland V. Forte Université Blaise Pascal, Clermont-Ferrand, France
	By increasing the CERN PS Booster injection energy from 50 MeV to 160 MeV, the LHC Injector Upgrade Project aims at producing twice as brighter beams for the LHC. Previous measurements showed a linear dependence of the transverse emittance with the beam intensity and space-charge simulations confirmed the linear scaling. This paper is discussing in detail the dependence on the longitudinal emittance and on the choice of the working point, with a special attention to the H⁻ injection process and to the beam dynamics in the first 5 ms, during the fall of the injection chicane bump.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF088
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THPF097	Feasibility Study of a New SPS Beam Dump System	3930
	F.M. Velotti, J.L. Abelleira, M.J. Barnes, C. Bracco, E. Carlier, F. Cerutti, K. Cornelis, R. Folch, B. Goddard, V. Kain, M. Meddahi, R.F. Morton, J.A. Osborne, F. Pasdeloup, V. Senaj, G.E. Steele, J.A. Uythoven, H. Vincke CERN, Geneva, Switzerland
	The CERN Super Proton Synchrotron (SPS) presently uses an internal beam dump system with two separate blocks to cleanly dispose of low and high energy beams. In view of the increased beam power and brightness needed for the LHC Injector Upgrade project for High Luminosity LHC (HL-LHC), the performance of this internal beam dump system has been reviewed for future operation. Different possible upgrades of the beam dumping system have been investigated. The initially considered solution for the SPS Beam Dump System is to design a new, dedicated external system, with a dump block in a shielded cavern separated from the machine ring. Unfortunately this solution is not feasible with the present technology. In this paper, the design requirements and the possible solutions are investigated, including considering a new internal beam dump in the Long Straight Section 5 (LSS5).
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF097
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Paper

Title

Page

LHC Transfer Lines and Injection Tests for Run 2

2098

C. Bracco, J.L. Abelleira, R. Alemany-Fernández, M.J. Barnes, W. Bartmann, E. Carlier, L.N. Drøsdal, M.A. Fraser, K. Fuchsberger, B. Goddard, J. Jentzsch, V. Kain, N. Magnin, M. Meddahi, J.S. Schmidt, L.S. Stoel, J.A. Uythoven, F.M. Velotti, J. Wenninger
CERN, Geneva, Switzerland

The transfer lines for both rings of the LHC were successfully re-commissioned with beam in preparation for the start-up of Run 2. This paper presents an overview of the transfer line and sector tests performed to bring the LHC back into operation after a two-year period of shutdown for consolidation and upgrade. The tests enabled the debugging of critical software and hardware systems and validated changes made to the transfer and injection systems. The beam-based measurements carried out to validate the optics and machine configuration are summarised along with the performance of the hardware systems.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPTY039

Export •

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

THPF082

Considerations on the Fast Pulsed Magnet Systems for the 2 GeV Beam Transfer from the CERN PSB to PS

3876

T. Kramer, J.L. Abelleira, W. Bartmann, J. Borburgh, L. Ducimetière, L.M.C. Feliciano, B. Goddard, L. Sermeus
CERN, Geneva, Switzerland

Within the scope of the LIU project the CERN PS Booster to PS beam transfer will be modified to match the requirements for the future 2 GeV proton beam energy upgrade. The paper describes considerations on the PSB extraction and recombination kickers as well as on the injection kicker(s) into the PS. Different schemes of an injection into the PS have been outlined in the past and are reviewed under the aspect of individual transfer kicker rise and fall time performances. Recent measurements on the recombination kickers are presented and subsequently homogenous rise and fall time requirements in the whole PSB to PS transfer chain are presented. The baseline option for the PS injection kicker(s) is outlined and compared to the previously presented concepts.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF082

Export •

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

THPF083

Painting Schemes for CERN PS Booster H⁻ Injection

3879

J.L. Abelleira, W. Bartmann, E. Benedetto, C. Bracco, G.P. Di Giovanni, V. Forte, M. Kowalska, M. Meddahi, B. Mikulec, G. Rumolo
CERN, Geneva, Switzerland
V. Forte
Université Blaise Pascal, Clermont-Ferrand, France
M. Kowalska
EPFL, Lausanne, Switzerland

The present 50-MeV proton injection into the PS Booster will be replaced by a H⁻ charge exchange injection at 160 MeV to be provided by Linac 4. The higher energy will allow producing beams at higher brightness. A set of kicker magnets (KSW) will move the beam across the stripping foil to perform phase space painting in the horizontal plane to reduce space charge effects. The PSB must satisfy the different users with very different beams in terms of emittance and intensity. Therefore, the KSW waveforms must be adapted for each case to meet the beam characteristics while minimizing beam losses. Here we present the results of the simulations performed to optimise the injection system. A detailed analysis of the different painting schemes is discussed, including the effect of the working point on the painted beam, and variations in the offset of the injected beam.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF083

Export •

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

THPF088

CERN PS Booster Upgrade and LHC Beams Emittance

3897

E. Benedetto, J.L. Abelleira, C. Bracco, V. Forte, B. Mikulec, G. Rumolo
CERN, Geneva, Switzerland
V. Forte
Université Blaise Pascal, Clermont-Ferrand, France

By increasing the CERN PS Booster injection energy from 50 MeV to 160 MeV, the LHC Injector Upgrade Project aims at producing twice as brighter beams for the LHC. Previous measurements showed a linear dependence of the transverse emittance with the beam intensity and space-charge simulations confirmed the linear scaling. This paper is discussing in detail the dependence on the longitudinal emittance and on the choice of the working point, with a special attention to the H⁻ injection process and to the beam dynamics in the first 5 ms, during the fall of the injection chicane bump.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF088

Export •

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

THPF097

Feasibility Study of a New SPS Beam Dump System

3930

F.M. Velotti, J.L. Abelleira, M.J. Barnes, C. Bracco, E. Carlier, F. Cerutti, K. Cornelis, R. Folch, B. Goddard, V. Kain, M. Meddahi, R.F. Morton, J.A. Osborne, F. Pasdeloup, V. Senaj, G.E. Steele, J.A. Uythoven, H. Vincke
CERN, Geneva, Switzerland

The CERN Super Proton Synchrotron (SPS) presently uses an internal beam dump system with two separate blocks to cleanly dispose of low and high energy beams. In view of the increased beam power and brightness needed for the LHC Injector Upgrade project for High Luminosity LHC (HL-LHC), the performance of this internal beam dump system has been reviewed for future operation. Different possible upgrades of the beam dumping system have been investigated. The initially considered solution for the SPS Beam Dump System is to design a new, dedicated external system, with a dump block in a shielded cavern separated from the machine ring. Unfortunately this solution is not feasible with the present technology. In this paper, the design requirements and the possible solutions are investigated, including considering a new internal beam dump in the Long Straight Section 5 (LSS5).

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF097

Export •

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