COOL2017 - List of Authors (Aulenbacher, K.)

Paper

Title

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TUP07

Secondary Electron and Photon Measurements at the HIM Electron Cooler Test Set-Up

Th. Beiser
IKP, Mainz, Germany
K. Aulenbacher, M.W. Bruker, T. Weilbach
HIM, Mainz, Germany

A low-energy test set-up for the measurement and optimisation of secondary electron currents from the collector in electron coolers is presented. A variable-field Wien filter and current-measuring aperture plates grant insight into the trajectory and energy distribution of the secondary particles. Photons emitted by residual gas ions trapped inside the electromagnetic potential of the electron beam can be used to measure the location of the beam. The exact composition of those ions, the optical spectrum of said photons, and the possibility of related beam diagnostics is a subject of ongoing research.

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TUP19

Status Report about the HV Power Supply and its Test-bench for the HESR Electron Cooler

I. Alexander, W. Klag
IKP, Mainz, Germany
K. Aulenbacher, J. Dietrich
HIM, Mainz, Germany
M.I. Bryzgunov, V.V. Parkhomchuk, V.B. Reva
BINP SB RAS, Novosibirsk, Russia

For an effective cooling at HESR electron energies between 2 MeV and 8 MeV are needed and continuous magnetic beam guidance from the gun to the collector is indispensable. In order to provide the necessary power for the magnet coils, several gas turbines are placed at different electrical potentials. The turbines can deliver a power of 5 kW and are operated with N2. The HV potentials are created by stacking power supplies (PS) that can produce a voltage of 600 kV. The group around V. V. Parkhomchuk at BINP has developed a prototype of the PS. Tests and improvements are ongoing until end of this year. As soon as the PS arrives at the HIM in Mainz, it will be assembled in a pressure vessel to ensure full operation capability. Various future projects could be realized. First, an electron gun could be attached to the PS to characterize different properties by electron beam. Secondly, an additional PS could be installed to increase the electron energy to 1.2 MeV. Thirdly, a gun and a collector could be attached to the PS and a magnetic structure for the beam recirculation could be mounted to demonstrate the feasibility of an electron cooler with the developed equipment.

Poster TUP19 [2.078 MB]

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TUM23

Status of the Turbine Concept for Relativistic Electron Coolers

K. Aulenbacher
IKP, Mainz, Germany

A turbine driven high voltage section for manetized d.c. electron coolers may offer considerable advantages. This project is pursued in collaboration of BINP and Helmholtzinstitut Mainz. A 600kV prototype has seen first tests and will be installed in a pressurized tank at HIM in 2018. An outlook to further developments will be given.

Slides TUM23 [1.057 MB]

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Paper	Title	Page
TUP07	Secondary Electron and Photon Measurements at the HIM Electron Cooler Test Set-Up
	Th. Beiser IKP, Mainz, Germany K. Aulenbacher, M.W. Bruker, T. Weilbach HIM, Mainz, Germany
	A low-energy test set-up for the measurement and optimisation of secondary electron currents from the collector in electron coolers is presented. A variable-field Wien filter and current-measuring aperture plates grant insight into the trajectory and energy distribution of the secondary particles. Photons emitted by residual gas ions trapped inside the electromagnetic potential of the electron beam can be used to measure the location of the beam. The exact composition of those ions, the optical spectrum of said photons, and the possibility of related beam diagnostics is a subject of ongoing research.
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TUP19	Status Report about the HV Power Supply and its Test-bench for the HESR Electron Cooler
	I. Alexander, W. Klag IKP, Mainz, Germany K. Aulenbacher, J. Dietrich HIM, Mainz, Germany M.I. Bryzgunov, V.V. Parkhomchuk, V.B. Reva BINP SB RAS, Novosibirsk, Russia
	For an effective cooling at HESR electron energies between 2 MeV and 8 MeV are needed and continuous magnetic beam guidance from the gun to the collector is indispensable. In order to provide the necessary power for the magnet coils, several gas turbines are placed at different electrical potentials. The turbines can deliver a power of 5 kW and are operated with N2. The HV potentials are created by stacking power supplies (PS) that can produce a voltage of 600 kV. The group around V. V. Parkhomchuk at BINP has developed a prototype of the PS. Tests and improvements are ongoing until end of this year. As soon as the PS arrives at the HIM in Mainz, it will be assembled in a pressure vessel to ensure full operation capability. Various future projects could be realized. First, an electron gun could be attached to the PS to characterize different properties by electron beam. Secondly, an additional PS could be installed to increase the electron energy to 1.2 MeV. Thirdly, a gun and a collector could be attached to the PS and a magnetic structure for the beam recirculation could be mounted to demonstrate the feasibility of an electron cooler with the developed equipment.
	Poster TUP19 [2.078 MB]
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TUM23	Status of the Turbine Concept for Relativistic Electron Coolers
	K. Aulenbacher IKP, Mainz, Germany
	A turbine driven high voltage section for manetized d.c. electron coolers may offer considerable advantages. This project is pursued in collaboration of BINP and Helmholtzinstitut Mainz. A 600kV prototype has seen first tests and will be installed in a pressurized tank at HIM in 2018. An outlook to further developments will be given.
	Slides TUM23 [1.057 MB]
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