IPAC2012 - List of Authors (Proft, D.)

Paper	Title	Page
MOPPR008	The Beam Loss Monitoring System at ELSA	786
	D. Proft, A. Balling, F. Frommberger, W. Hillert ELSA, Bonn, Germany
	A new diagnostic tool to monitor beam loss in the storage ring at the Electron Stretcher Facility ELSA has been set up. It enables the investigation of causes for electron loss in real time, providing an essential tool needed to achieve the planned beam current upgrade from 30 mA to 200 mA. The monitoring system consists of 32 pin-diode based radiation detectors spread around the storage ring. Therefore, individual electron loss can be localized after each quadrupole. The readout system was designed to allow an integration of single loss events within 70 μs in order to be able to correlate these events to machine state changes. The used monitoring hardware and readout system will be detailed. Furthermore first measurements of the beam loss during injection, the fast energy ramp during acceleration and the extraction phase will be presented.

MOPPR010	Simultaneous Measurement of Emittance at the Storage Ring and the External Beamlines of ELSA	792
	S. Zander, F. Frommberger, W. Hillert, D. Proft ELSA, Bonn, Germany
	Funding: Funded by the DFG within the SFB / TR 16. The Electron Stretcher Facility (ELSA) consists of several accelerator stages, the last one being a storage ring providing a beam of polarized electrons of up to 3.5 GeV. To ensure a high duty cycle, a slow extraction via a third integer resonance is applied at ELSA. The resonance extraction cause a variation of the emittance in the external beamline. A system for simultaneous measurement of emittance in the storage ring and the external beamlines has been installed. First results including a comparison of both emittances will be shown.

MOPPR014	Installation and Test of a Beam Loss Monitor System for the S-DALINAC	804
	R. Stegmann, U. Bonnes, C. Burandt, R. Eichhorn, F. Hug, L.E. Jürgensen, N. Pietralla TU Darmstadt, Darmstadt, Germany D. Proft ELSA, Bonn, Germany
	Funding: This work is supported by the DFG through SFB 634. The superconducting Darmstadt linear accelarator S-DALINAC is designed for accelerating electrons up to energies of 130 MeV for measurements in nuclear physics at small momentum transfers. For the purpose of machine protection and in order to increase reliability and efficiency an efficient tool for on-line measurements of beam losses down to electron energies of 1 MeV is desirable. Therefore a system of beam-loss monitors has been developed, installed, and tested. The system consists of commercially availiable PIN-diods and newly developed electronics. Implementation in the S-DALINAC's control system is done via EPICS IOC. We will report on the setup of the beam-loss monitoring system and on its initial performance in first tests.

Paper

Title

Page

The Beam Loss Monitoring System at ELSA

786

D. Proft, A. Balling, F. Frommberger, W. Hillert
ELSA, Bonn, Germany

A new diagnostic tool to monitor beam loss in the storage ring at the Electron Stretcher Facility ELSA has been set up. It enables the investigation of causes for electron loss in real time, providing an essential tool needed to achieve the planned beam current upgrade from 30 mA to 200 mA. The monitoring system consists of 32 pin-diode based radiation detectors spread around the storage ring. Therefore, individual electron loss can be localized after each quadrupole. The readout system was designed to allow an integration of single loss events within 70 μs in order to be able to correlate these events to machine state changes. The used monitoring hardware and readout system will be detailed. Furthermore first measurements of the beam loss during injection, the fast energy ramp during acceleration and the extraction phase will be presented.

MOPPR010

Simultaneous Measurement of Emittance at the Storage Ring and the External Beamlines of ELSA

792

S. Zander, F. Frommberger, W. Hillert, D. Proft
ELSA, Bonn, Germany

Funding: Funded by the DFG within the SFB / TR 16.
The Electron Stretcher Facility (ELSA) consists of several accelerator stages, the last one being a storage ring providing a beam of polarized electrons of up to 3.5 GeV. To ensure a high duty cycle, a slow extraction via a third integer resonance is applied at ELSA. The resonance extraction cause a variation of the emittance in the external beamline. A system for simultaneous measurement of emittance in the storage ring and the external beamlines has been installed. First results including a comparison of both emittances will be shown.

MOPPR014

Installation and Test of a Beam Loss Monitor System for the S-DALINAC

804

R. Stegmann, U. Bonnes, C. Burandt, R. Eichhorn, F. Hug, L.E. Jürgensen, N. Pietralla
TU Darmstadt, Darmstadt, Germany
D. Proft
ELSA, Bonn, Germany

Funding: This work is supported by the DFG through SFB 634.
The superconducting Darmstadt linear accelarator S-DALINAC is designed for accelerating electrons up to energies of 130 MeV for measurements in nuclear physics at small momentum transfers. For the purpose of machine protection and in order to increase reliability and efficiency an efficient tool for on-line measurements of beam losses down to electron energies of 1 MeV is desirable. Therefore a system of beam-loss monitors has been developed, installed, and tested. The system consists of commercially availiable PIN-diods and newly developed electronics. Implementation in the S-DALINAC's control system is done via EPICS IOC. We will report on the setup of the beam-loss monitoring system and on its initial performance in first tests.