DIPAC2011 - List of Authors (Dietrich, J.)

Paper	Title	Page
MOPD48	Optical Electron Beam Diagnostics for Relativistic Electron Cooling Devices	158
	T. Weilbach HIM, Mainz, Germany K. Aulenbacher IKP, Mainz, Germany J. Dietrich FZJ, Jülich, Germany
	New magnetized high energy coolers like the one proposed for the High Energy Storage Ring (HESR) at the Facility for Antiproton and Ion Research (FAIR) have specific demands on the diagnostic of the electron beam. Due to high voltage breakdowns they only allow a very small beam loss so non-invasive beam diagnostic methods are necessary. For beam profile measurement a system based on beam induced fluorescence (BIF) was designed and is under installation at the 100 keV polarized test setup at the Mainzer Mikrotron (MAMI) at the moment. For the diagnostic of other observables of the cooling beam, like the electron beam energy or the electron temperature, a Thomson scattering experiment is planned at the same setup. The planned experiments for the beam profile measurement are presented and the challenges of the Thomson scattering method are discussed.

MOPD51	Progress with the Scintillation Profile Monitor at COSY	164
	V. Kamerdzhiev, J. Dietrich, F. Klehr, K. Reimers FZJ, Jülich, Germany
	After successful demonstration measurements with the Scintillation Profile Monitor at COSY, a dedicated vacuum chamber with two vacuum windows and supporting vacuum ports was installed in the COSY synchrotron. The chamber is blackened inside to suppress light reflection. Since residual gas pressure is too low to support reliable profile measurements based on beam induced scintillation, a piezo-electric dosing valve was installed allowing fast injections of defined amount of nitrogen. A 32-channel photomultiplier is used to detect light. Beam profile measurements and first operational experience are reported.

TUPD51	Ionization Profile Monitors - IPM @ GSI	419
	T. Giacomini, P. Forck GSI, Darmstadt, Germany J.G. De Villiers iThemba LABS, Somerset West, South Africa J. Dietrich FZJ, Jülich, Germany D.A. Liakin ITEP, Moscow, Russia
	The Ionization Profile Monitor in the SIS18 is frequently used for machine development. The permanent availability and the elaborated software user interface make it easy and comfortable to use. Additional to the beam profile data the device records the data of synchrotron dc current, dipole ramp and accelerating rf properties. The trend curves of these data are shown correlated to the beam profile evolution for a full synchrotron cycle from injection to extraction with 100 profiles/s. The reliable function is based on the optimized in-vacuum hardware design, like the stable high voltage connections, the electric field box with very uniform field distribution and the uv-light based calibration system. The permanent availability is based on the convenient software interface using the Qt library. A new IPM generation was recently commissioned in the experimental storage ring ESR at GSI and one in the COSY ring at FZ-Jülich. These monitors are enhancements of the SIS18 multiwire IPM but equipped with an especially developed large area 50x100 mm² optical particle detector of rectangular shape that is readout by a digital camera through a viewport.

Paper

Title

Page

Optical Electron Beam Diagnostics for Relativistic Electron Cooling Devices

158

T. Weilbach
HIM, Mainz, Germany
K. Aulenbacher
IKP, Mainz, Germany
J. Dietrich
FZJ, Jülich, Germany

New magnetized high energy coolers like the one proposed for the High Energy Storage Ring (HESR) at the Facility for Antiproton and Ion Research (FAIR) have specific demands on the diagnostic of the electron beam. Due to high voltage breakdowns they only allow a very small beam loss so non-invasive beam diagnostic methods are necessary. For beam profile measurement a system based on beam induced fluorescence (BIF) was designed and is under installation at the 100 keV polarized test setup at the Mainzer Mikrotron (MAMI) at the moment. For the diagnostic of other observables of the cooling beam, like the electron beam energy or the electron temperature, a Thomson scattering experiment is planned at the same setup. The planned experiments for the beam profile measurement are presented and the challenges of the Thomson scattering method are discussed.

MOPD51

Progress with the Scintillation Profile Monitor at COSY

164

V. Kamerdzhiev, J. Dietrich, F. Klehr, K. Reimers
FZJ, Jülich, Germany

After successful demonstration measurements with the Scintillation Profile Monitor at COSY, a dedicated vacuum chamber with two vacuum windows and supporting vacuum ports was installed in the COSY synchrotron. The chamber is blackened inside to suppress light reflection. Since residual gas pressure is too low to support reliable profile measurements based on beam induced scintillation, a piezo-electric dosing valve was installed allowing fast injections of defined amount of nitrogen. A 32-channel photomultiplier is used to detect light. Beam profile measurements and first operational experience are reported.

TUPD51

Ionization Profile Monitors - IPM @ GSI

419

T. Giacomini, P. Forck
GSI, Darmstadt, Germany
J.G. De Villiers
iThemba LABS, Somerset West, South Africa
J. Dietrich
FZJ, Jülich, Germany
D.A. Liakin
ITEP, Moscow, Russia

The Ionization Profile Monitor in the SIS18 is frequently used for machine development. The permanent availability and the elaborated software user interface make it easy and comfortable to use. Additional to the beam profile data the device records the data of synchrotron dc current, dipole ramp and accelerating rf properties. The trend curves of these data are shown correlated to the beam profile evolution for a full synchrotron cycle from injection to extraction with 100 profiles/s. The reliable function is based on the optimized in-vacuum hardware design, like the stable high voltage connections, the electric field box with very uniform field distribution and the uv-light based calibration system. The permanent availability is based on the convenient software interface using the Qt library. A new IPM generation was recently commissioned in the experimental storage ring ESR at GSI and one in the COSY ring at FZ-Jülich. These monitors are enhancements of the SIS18 multiwire IPM but equipped with an especially developed large area 50x100 mm² optical particle detector of rectangular shape that is readout by a digital camera through a viewport.