COOL2023 - List of Authors (Gamba, D.)

Paper	Title	Page
MOPPM1R3	Specifications and Status of the New Electron Cooler for the CERN Antiproton Decelerator (AD)	5
	A. Rossi, C. Accettura, W. Andreazza, A. Bollazzi, J. Cenede, N.S. Chritin, Y.C. Coutron, J.A. Ferreira Somoza, A. Frassier, D. Gamba, L.V. Jørgensen, G. Khatri, C. Machado, O. Marqversen, A.I. Pikin, L. Ponce, M. Sameed, C.C. Sequeiro, A. Sinturel, Y. Thurel, T. Todorcevic, G. Tranquille, L. von Freeden CERN, Geneva, Switzerland
	A new electron cooler for the Antiproton Decelerator (AD) is being designed at CERN, and will replace the current device (in operation for more than 40 years), during the next Long Shutdown (2026-2028). The functional specifications [ref. to Davide’s IPAC23], recalled in this paper, favour high reliability, with improved performance in terms of time of cooling, obtained mainly with better field quality and possibly higher electron beam current. The status of the new electron cooler design is presented, showing an evolution that aims at easing integration, installation and maintenance.
	Slides MOPPM1R3 [10.544 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-COOL2023-MOPPM1R3
About •	Received ※ 24 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 20 November 2023 — Issued ※ 02 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPAM1R3	Status of E-Cooling Characterisation at 100 keV in ELENA	40
	D. Gamba, F. Asvesta, P.M. Kruyt, L. Ponce, G. Russo CERN, Meyrin, Switzerland
	The Extra Low ENergy Antiproton ring (ELENA) ring at CERN was commissioned in 2018 and is in regular production operation from 2021. ELENA uses e-cooling for cooling pbar beams on two plateaus at 653 keV and 100 keV kinetic energy. The first cooling is necessary to allow for efficient deceleration of the 5.3 MeV pbar beam coming from the Antiproton Decelerator (AD), while the second cooling is used to define the quality of the bunches before extraction. The experience accumulated so far shows that cooling at 653 keV is sufficient to ensure good deceleration efficiency, while cooling at 100 keV might not be sufficient to provide the design transverse beam emittances at extraction. In this paper we document the present ELENA e-cooling performance at 100 keV, the typical optimisation procedure used during setup, and we investigate possible limitations of the present system.
	Slides THPAM1R3 [9.034 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-COOL2023-THPAM1R3
About •	Received ※ 25 October 2023 — Revised ※ 21 November 2023 — Accepted ※ 21 November 2023 — Issued ※ 02 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPOSRP02	Advancements and Applications of Cooling Simulation Tools: A Focus on Xsuite	49
	P.M. Kruyt, D. Gamba CERN, Meyrin, Switzerland G. Franchetti GSI, Darmstadt, Germany
	This paper presents the current status of cooling simulation tools and their advancements and applications, with a focus on Xsuite, a new simulation tool developed that includes cooling, space charge, and intrabeam scattering. The paper covers the capabilities of cooling simulation tools, recent advancements, and their impact on the field of beam cooling. The interplay of different cooling techniques with heating effects is discussed, and predictive models for existing and future electron cooler performance optimization are presented. The feasibility of laser cooling in the CERN storage rings is also assessed, with a focus on future project proposals in the frame of the Physics Beyond Colliders (PBC) project.
	Poster THPOSRP02 [0.995 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-COOL2023-THPOSRP02
About •	Received ※ 18 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 21 November 2023 — Issued ※ 02 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPOSRP22	Experience with Beam Transfer Function Measurements for Setting-up the Stochastic Cooling System in the CERN Anti-Proton Decelerator (AD)	102
	S.F. Rey, W.B. Bastos, F. Caspers, B. Dupuy, D. Gamba, W. Höfle, R. Louwerse CERN, Meyrin, Switzerland
	Beam transfer function measurements have regularly been used to set-up the adjustable parameters for stochastic cooling systems. We report on the automation of these measurements at CERN that permit efficient set-up of the cooling loops in the anti-proton decelerator (AD) and enables insight into the bandwidth (nominal frequency range of 850 MHz to 1.7 GHz) of the overall system for the longitudinal, horizontal and vertical cooling at the two different beam momenta of 2 GeV/c and 3.5 GeV/c. Data collected in machine development sessions can be used to identify areas of improvement and will be indispensable in defining the planned path for consolidation and upgrade of the system. It allows the comparison of the bandwidth with the computed shunt impedance of the currently used kickers. The unwanted interplay between the three different planes of cooling is also evaluated and will help to define improvements in the system for the future.
	Poster THPOSRP22 [0.905 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-COOL2023-THPOSRP22
About •	Received ※ 23 October 2023 — Revised ※ 14 November 2023 — Accepted ※ 21 November 2023 — Issued ※ 02 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Specifications and Status of the New Electron Cooler for the CERN Antiproton Decelerator (AD)

5

A. Rossi, C. Accettura, W. Andreazza, A. Bollazzi, J. Cenede, N.S. Chritin, Y.C. Coutron, J.A. Ferreira Somoza, A. Frassier, D. Gamba, L.V. Jørgensen, G. Khatri, C. Machado, O. Marqversen, A.I. Pikin, L. Ponce, M. Sameed, C.C. Sequeiro, A. Sinturel, Y. Thurel, T. Todorcevic, G. Tranquille, L. von Freeden
CERN, Geneva, Switzerland

A new electron cooler for the Antiproton Decelerator (AD) is being designed at CERN, and will replace the current device (in operation for more than 40 years), during the next Long Shutdown (2026-2028). The functional specifications [ref. to Davide’s IPAC23], recalled in this paper, favour high reliability, with improved performance in terms of time of cooling, obtained mainly with better field quality and possibly higher electron beam current. The status of the new electron cooler design is presented, showing an evolution that aims at easing integration, installation and maintenance.

Slides MOPPM1R3 [10.544 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-COOL2023-MOPPM1R3

About •

Received ※ 24 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 20 November 2023 — Issued ※ 02 December 2023

Cite •

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

THPAM1R3

Status of E-Cooling Characterisation at 100 keV in ELENA

40

D. Gamba, F. Asvesta, P.M. Kruyt, L. Ponce, G. Russo
CERN, Meyrin, Switzerland

The Extra Low ENergy Antiproton ring (ELENA) ring at CERN was commissioned in 2018 and is in regular production operation from 2021. ELENA uses e-cooling for cooling pbar beams on two plateaus at 653 keV and 100 keV kinetic energy. The first cooling is necessary to allow for efficient deceleration of the 5.3 MeV pbar beam coming from the Antiproton Decelerator (AD), while the second cooling is used to define the quality of the bunches before extraction. The experience accumulated so far shows that cooling at 653 keV is sufficient to ensure good deceleration efficiency, while cooling at 100 keV might not be sufficient to provide the design transverse beam emittances at extraction. In this paper we document the present ELENA e-cooling performance at 100 keV, the typical optimisation procedure used during setup, and we investigate possible limitations of the present system.

Slides THPAM1R3 [9.034 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-COOL2023-THPAM1R3

About •

Received ※ 25 October 2023 — Revised ※ 21 November 2023 — Accepted ※ 21 November 2023 — Issued ※ 02 December 2023

Cite •

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

THPOSRP02

Advancements and Applications of Cooling Simulation Tools: A Focus on Xsuite

49

P.M. Kruyt, D. Gamba
CERN, Meyrin, Switzerland
G. Franchetti
GSI, Darmstadt, Germany

This paper presents the current status of cooling simulation tools and their advancements and applications, with a focus on Xsuite, a new simulation tool developed that includes cooling, space charge, and intrabeam scattering. The paper covers the capabilities of cooling simulation tools, recent advancements, and their impact on the field of beam cooling. The interplay of different cooling techniques with heating effects is discussed, and predictive models for existing and future electron cooler performance optimization are presented. The feasibility of laser cooling in the CERN storage rings is also assessed, with a focus on future project proposals in the frame of the Physics Beyond Colliders (PBC) project.

Poster THPOSRP02 [0.995 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-COOL2023-THPOSRP02

About •

Received ※ 18 October 2023 — Revised ※ 03 November 2023 — Accepted ※ 21 November 2023 — Issued ※ 02 December 2023

Cite •

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

THPOSRP22

Experience with Beam Transfer Function Measurements for Setting-up the Stochastic Cooling System in the CERN Anti-Proton Decelerator (AD)

102

S.F. Rey, W.B. Bastos, F. Caspers, B. Dupuy, D. Gamba, W. Höfle, R. Louwerse
CERN, Meyrin, Switzerland

Beam transfer function measurements have regularly been used to set-up the adjustable parameters for stochastic cooling systems. We report on the automation of these measurements at CERN that permit efficient set-up of the cooling loops in the anti-proton decelerator (AD) and enables insight into the bandwidth (nominal frequency range of 850 MHz to 1.7 GHz) of the overall system for the longitudinal, horizontal and vertical cooling at the two different beam momenta of 2 GeV/c and 3.5 GeV/c. Data collected in machine development sessions can be used to identify areas of improvement and will be indispensable in defining the planned path for consolidation and upgrade of the system. It allows the comparison of the bandwidth with the computed shunt impedance of the currently used kickers. The unwanted interplay between the three different planes of cooling is also evaluated and will help to define improvements in the system for the future.

Poster THPOSRP22 [0.905 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-COOL2023-THPOSRP22

About •

Received ※ 23 October 2023 — Revised ※ 14 November 2023 — Accepted ※ 21 November 2023 — Issued ※ 02 December 2023

Cite •

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