2011 Particle Accelerator Conference - List of Keywords (accumulation)

Paper	Title	Other Keywords	Page
TUP148	Ion Trapping Study in eRHIC	ion, electron, linac, cavity	1109
	Y. Hao, V. Litvinenko, V. Ptitsyn BNL, Upton, Long Island, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. The ion trapping effect is an important effect in energy recovery linac (ERL). The ionized residue gas molecules can accumulate at the vicinity of the electron beam pass and deteriorate the quality of the electron beam. In this paper, we present simulation results to address this issue in eRHIC and find best beam pattern to eliminate this effect.

WEP130	Simulation Study of Transverse Spectrum in HIRFL-CSR	simulation, electron, ion, power-supply	1722
	P. Li, L.J. Mao, J.W. Xia, J.C. Yang, D.Y. Yin, Y.J. Yuan IMP, Lanzhou, People's Republic of China
	Funding: Work supported by HIRFL-CSR project Particles in a storage ring oscillate in the longitudinal and transverse dimensions. Therefore, the beam parameters, such as tune, momentum spread, emittance and their evolution can be obtained by analyzing the beam signals in frequency domain. In this paper, the simulation result of transverse beam spectrum in HIRFL-CSR is reported, including the influence of electron cooling, power supply ripple and the misalignment between ion and electron beams. Transverse coupling would occur if the longitudinal magnetic field of electron cooling device can not be compensated. And the distribution of ion beam in transverse space is a circle due to the misalignment between ion and electron beams. In this paper, main interest is focused on the effect of power supply ripple. The tune ripple form is the sine ware with the frequency of 50Hz which is equal to that of the industrial frequency in the simulation firstly. And then different forms of current ripple of power supply are simulated for comparative analysis. Tune shift will be induced by the power supply ripple. In this paper, those factors which may affect the accumulation of HIRFL-CSR are simulated in transverse beam spectrum.

THOCN2	The High-Energy Storage Ring (HESR)	electron, antiproton, target, ion	2104
	R. Maier FZJ, Jülich, Germany
	The High-Energy Storage Ring (HESR) is part of the upcoming International Facility for Antiproton and Ion Research (FAIR) at GSI in Darmstadt. An important feature of this new facility is the combination of powerful phase-space cooled beams and thick internal targets (e.g., pellet targets) to reach the demanding requirements of the internal target experiment PANDA in terms of beam quality and luminosity. In this paper the status of the preparatory work for the HESR at the FZ Jülich is summarized. The main activities are beam dynamics simulations and hardware developments for HESR in combination with accelerator component tests and beam dynamics experiments at the Cooler Synchrotron COSY.
	Slides THOCN2 [4.366 MB]

Paper

Title

Other Keywords

Page

TUP148

Ion Trapping Study in eRHIC

ion, electron, linac, cavity

1109

Y. Hao, V. Litvinenko, V. Ptitsyn
BNL, Upton, Long Island, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
The ion trapping effect is an important effect in energy recovery linac (ERL). The ionized residue gas molecules can accumulate at the vicinity of the electron beam pass and deteriorate the quality of the electron beam. In this paper, we present simulation results to address this issue in eRHIC and find best beam pattern to eliminate this effect.

WEP130

Simulation Study of Transverse Spectrum in HIRFL-CSR

simulation, electron, ion, power-supply

1722

P. Li, L.J. Mao, J.W. Xia, J.C. Yang, D.Y. Yin, Y.J. Yuan
IMP, Lanzhou, People's Republic of China

Funding: Work supported by HIRFL-CSR project
Particles in a storage ring oscillate in the longitudinal and transverse dimensions. Therefore, the beam parameters, such as tune, momentum spread, emittance and their evolution can be obtained by analyzing the beam signals in frequency domain. In this paper, the simulation result of transverse beam spectrum in HIRFL-CSR is reported, including the influence of electron cooling, power supply ripple and the misalignment between ion and electron beams. Transverse coupling would occur if the longitudinal magnetic field of electron cooling device can not be compensated. And the distribution of ion beam in transverse space is a circle due to the misalignment between ion and electron beams. In this paper, main interest is focused on the effect of power supply ripple. The tune ripple form is the sine ware with the frequency of 50Hz which is equal to that of the industrial frequency in the simulation firstly. And then different forms of current ripple of power supply are simulated for comparative analysis. Tune shift will be induced by the power supply ripple. In this paper, those factors which may affect the accumulation of HIRFL-CSR are simulated in transverse beam spectrum.

THOCN2

The High-Energy Storage Ring (HESR)

electron, antiproton, target, ion

2104

R. Maier
FZJ, Jülich, Germany

The High-Energy Storage Ring (HESR) is part of the upcoming International Facility for Antiproton and Ion Research (FAIR) at GSI in Darmstadt. An important feature of this new facility is the combination of powerful phase-space cooled beams and thick internal targets (e.g., pellet targets) to reach the demanding requirements of the internal target experiment PANDA in terms of beam quality and luminosity. In this paper the status of the preparatory work for the HESR at the FZ Jülich is summarized. The main activities are beam dynamics simulations and hardware developments for HESR in combination with accelerator component tests and beam dynamics experiments at the Cooler Synchrotron COSY.

Slides THOCN2 [4.366 MB]