COOL2019 - List of Authors (Eriksson, T.)

Paper	Title	Page
MOY01	First Operation for Stochastic Cooling of P-Bars in the CERN AD Using Optical Delay Notch Filter and Plans 2021 Operation	6
	W. Höfle, L. Arnaudon, E. Bjørsvik, F. Caspers, T. Eriksson, R. Louwerse, V.R. Myklebust CERN, Meyrin, Switzerland
	During the 2018 run of AD a notch filter with optical delay lines for the longitudinal stochastic cooling at 3.5 GeV/c was successfully tested with beam for the first time. The contribution will summarise the hardware implemented including a comparison of the hardware transfer functions of the new system and the original system using a coaxial cable plant for the same purpose. Automatic monitoring of the hardware transfer function being prepared for 2021 will be provided in order to periodically check drifts of the system and send corrections to the control of the system. Integration of this monitoring and feedforward system into the CERN controls environment will be shown.
	Slides MOY01 [13.332 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2019-MOY01
About •	paper received ※ 20 September 2019 paper accepted ※ 21 October 2019 issue date ※ 01 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

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

Paper

Title

Page

First Operation for Stochastic Cooling of P-Bars in the CERN AD Using Optical Delay Notch Filter and Plans 2021 Operation

6

W. Höfle, L. Arnaudon, E. Bjørsvik, F. Caspers, T. Eriksson, R. Louwerse, V.R. Myklebust
CERN, Meyrin, Switzerland

During the 2018 run of AD a notch filter with optical delay lines for the longitudinal stochastic cooling at 3.5 GeV/c was successfully tested with beam for the first time. The contribution will summarise the hardware implemented including a comparison of the hardware transfer functions of the new system and the original system using a coaxial cable plant for the same purpose. Automatic monitoring of the hardware transfer function being prepared for 2021 will be provided in order to periodically check drifts of the system and send corrections to the control of the system. Integration of this monitoring and feedforward system into the CERN controls environment will be shown.

Slides MOY01 [13.332 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2019-MOY01

About •

paper received ※ 20 September 2019 paper accepted ※ 21 October 2019 issue date ※ 01 November 2019

Export •

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

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

Export •

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