COOL2019 - List of Authors (Gamba, D.)

Paper	Title	Page
WEX03	ELENA Commissioning	52
	D. Gamba, C. Carli, T. Eriksson, L. Ponce, G. Tranquille CERN, Meyrin, Switzerland
	The Extra Low Energy Antiproton storage ring (ELENA) is an upgrade project at the CERN AD (Antiproton Decelerator). ELENA will further decelerate the 5.3 MeV antiprotons coming from the AD down to 100 keV and allow the experiments typically operating traps to increase the capture efficiency. ELENA features electron cooling for emittance control during the deceleration and therefore preserve the beam intensity and to generate bright bunches extracted towards the experiments. The ring has been completed with the installation of the electron cooler at the beginning of 2018. The electron cooler is meant to operate at an electron energy of 355 eV and 54 eV, corresponding to a pbar momentum of 35 MeV/c and 13.7 MeV/c. First observations of cooling have been observed at both energies, and decelerated ion beams with characteristics close to the design values have been obtained before the start of CERN Long Shutdown 2 (LS2). The latest results of ELENA commissioning will be presented, together with an overview of the project and status and plans.
	Slides WEX03 [81.447 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2019-WEX03
About •	paper received ※ 24 September 2019 paper accepted ※ 18 October 2019 issue date ※ 01 November 2019
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TUPS06	Electron Cooling Simulation Benchmarking	89
	B. Veglia, J. Resta-López, C.P. Welsch Cockcroft Institute, Warrington, Cheshire, United Kingdom N. Biancacci, D. Gamba, A. Latina, Á. Saá Hernández CERN, Meyrin, Switzerland J. Resta-López, C.P. Welsch The University of Liverpool, Liverpool, United Kingdom
	Funding: This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 721559. Electron coolers are commonly used in storage rings to reduce the phase space volume of heavy particles such as protons, antiprotons and ions. Their effect depends on the Coulomb interactions between the circulating beam and the cold electrons at small relative velocities. The cooling process can be modelled through different approaches and the behaviour of the cooling force, can be described by various formulas, which include different parameters. The aim of the present study is to compare the accuracy of the cooling simulations performed by two distinct beam-tracking codes: Betacool and RF-Track. Being based on different models and formulas, the two simulation tools require different parameters in order to realistically describe electron cooling. In this contribution, the impact of these parameters is discussed, and simulation predictions are compared with experimental data from LEIR (Low Energy Ion Ring) at CERN and ESR (Experimentier-Speicher-Ring) at GSI. Fur-thermore, the friction force is calculated for the new antimatter storage ring ELENA (Extra Low Energy Anti-proton) at CERN.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2019-TUPS06
About •	paper received ※ 15 October 2019 paper accepted ※ 18 October 2019 issue date ※ 01 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

ELENA Commissioning

52

D. Gamba, C. Carli, T. Eriksson, L. Ponce, G. Tranquille
CERN, Meyrin, Switzerland

The Extra Low Energy Antiproton storage ring (ELENA) is an upgrade project at the CERN AD (Antiproton Decelerator). ELENA will further decelerate the 5.3 MeV antiprotons coming from the AD down to 100 keV and allow the experiments typically operating traps to increase the capture efficiency. ELENA features electron cooling for emittance control during the deceleration and therefore preserve the beam intensity and to generate bright bunches extracted towards the experiments. The ring has been completed with the installation of the electron cooler at the beginning of 2018. The electron cooler is meant to operate at an electron energy of 355 eV and 54 eV, corresponding to a pbar momentum of 35 MeV/c and 13.7 MeV/c. First observations of cooling have been observed at both energies, and decelerated ion beams with characteristics close to the design values have been obtained before the start of CERN Long Shutdown 2 (LS2). The latest results of ELENA commissioning will be presented, together with an overview of the project and status and plans.

Slides WEX03 [81.447 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2019-WEX03

About •

paper received ※ 24 September 2019 paper accepted ※ 18 October 2019 issue date ※ 01 November 2019

Export •

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

TUPS06

Electron Cooling Simulation Benchmarking

89

B. Veglia, J. Resta-López, C.P. Welsch
Cockcroft Institute, Warrington, Cheshire, United Kingdom
N. Biancacci, D. Gamba, A. Latina, Á. Saá Hernández
CERN, Meyrin, Switzerland
J. Resta-López, C.P. Welsch
The University of Liverpool, Liverpool, United Kingdom

Funding: This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 721559.
Electron coolers are commonly used in storage rings to reduce the phase space volume of heavy particles such as protons, antiprotons and ions. Their effect depends on the Coulomb interactions between the circulating beam and the cold electrons at small relative velocities. The cooling process can be modelled through different approaches and the behaviour of the cooling force, can be described by various formulas, which include different parameters. The aim of the present study is to compare the accuracy of the cooling simulations performed by two distinct beam-tracking codes: Betacool and RF-Track. Being based on different models and formulas, the two simulation tools require different parameters in order to realistically describe electron cooling. In this contribution, the impact of these parameters is discussed, and simulation predictions are compared with experimental data from LEIR (Low Energy Ion Ring) at CERN and ESR (Experimentier-Speicher-Ring) at GSI. Fur-thermore, the friction force is calculated for the new antimatter storage ring ELENA (Extra Low Energy Anti-proton) at CERN.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2019-TUPS06

About •

paper received ※ 15 October 2019 paper accepted ※ 18 October 2019 issue date ※ 01 November 2019

Export •

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