COOL2019 - List of Authors (Halama, A.J.)

Paper	Title	Page
MOX01	COSY Experience of Electron Cooling	1
	V.B. Reva, M.I. Bryzgunov, V.V. Parkhomchuk BINP SB RAS, Novosibirsk, Russia A.J. Halama, V. Kamerdzhiev, P.J. Niedermayer FZJ, Jülich, Germany
	The 2 MeV electron cooling system for COSY-Julich has highest energy for the electron cooler with strong longitudinal magnetic field. During operation the cooling process was detailed investigated at 908 keV energy of electron beam. The proton beam was cooled at different regimes: RF, barrier bucket RF, cluster target and stochastic cooling. This article deals with the experience of electron cooling at high energy.
	Slides MOX01 [3.053 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2019-MOX01
About •	paper received ※ 12 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)

FRX01	Recent Developments and Experimental Results From Electron Cooling of a 2.4 GeV/c Proton Beam at COSY	72
	P.J. Niedermayer, A.J. Halama, V. Kamerdzhiev, N. Shurkhno, R. Stassen FZJ, Jülich, Germany T. Katayama Nihon University, Narashino, Chiba, Japan V.B. Reva BINP SB RAS, Novosibirsk, Russia
	The COSY control system as well as other subsystems are being upgraded. The 2 MeV electron cooler was recently extended with the EPICS control system and thereby integrated into the control and data acquisition system of the Cooler Synchrotron COSY. Taking advantages of the new software capabilities, studies of transverse and longitudinal magnetized electron cooling of a proton beam at 2.4 GeV/c were carried out. Electron and stochastic cooling were combined to reduce the cooling time while achieving lowest possible emittance and momentum spread. Results from experiments are discussed including cooling dynamics during operation of an internal cluster-jet target designed for the PANDA experiment at HESR. We present the results of probing the electron velocity distribution by means of the strongly cooled beam itself. The shape of the measured distibution may be caused by the galloping/scalloping effects within the electron beam. This effect plays a significant role in the strong dependence of the longitudinal and transverse electron cooling process on the proton beam size. Also discussed are the technical developments, achievements and further plans regarding the control system upgrade.
	Slides FRX01 [4.424 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2019-FRX01
About •	paper received ※ 21 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

COSY Experience of Electron Cooling

1

V.B. Reva, M.I. Bryzgunov, V.V. Parkhomchuk
BINP SB RAS, Novosibirsk, Russia
A.J. Halama, V. Kamerdzhiev, P.J. Niedermayer
FZJ, Jülich, Germany

The 2 MeV electron cooling system for COSY-Julich has highest energy for the electron cooler with strong longitudinal magnetic field. During operation the cooling process was detailed investigated at 908 keV energy of electron beam. The proton beam was cooled at different regimes: RF, barrier bucket RF, cluster target and stochastic cooling. This article deals with the experience of electron cooling at high energy.

Slides MOX01 [3.053 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2019-MOX01

About •

paper received ※ 12 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)

FRX01

Recent Developments and Experimental Results From Electron Cooling of a 2.4 GeV/c Proton Beam at COSY

72

P.J. Niedermayer, A.J. Halama, V. Kamerdzhiev, N. Shurkhno, R. Stassen
FZJ, Jülich, Germany
T. Katayama
Nihon University, Narashino, Chiba, Japan
V.B. Reva
BINP SB RAS, Novosibirsk, Russia

The COSY control system as well as other subsystems are being upgraded. The 2 MeV electron cooler was recently extended with the EPICS control system and thereby integrated into the control and data acquisition system of the Cooler Synchrotron COSY. Taking advantages of the new software capabilities, studies of transverse and longitudinal magnetized electron cooling of a proton beam at 2.4 GeV/c were carried out. Electron and stochastic cooling were combined to reduce the cooling time while achieving lowest possible emittance and momentum spread. Results from experiments are discussed including cooling dynamics during operation of an internal cluster-jet target designed for the PANDA experiment at HESR. We present the results of probing the electron velocity distribution by means of the strongly cooled beam itself. The shape of the measured distibution may be caused by the galloping/scalloping effects within the electron beam. This effect plays a significant role in the strong dependence of the longitudinal and transverse electron cooling process on the proton beam size. Also discussed are the technical developments, achievements and further plans regarding the control system upgrade.

Slides FRX01 [4.424 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-COOL2019-FRX01

About •

paper received ※ 21 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)