DIPAC2011 - List of Authors (Werner, M.)

Paper

Title

Page

Sensitivity Optimization of the Standard Beam Current Monitors for XFEL and FLASH II

197

M. Werner, J. Lund-Nielsen, Re. Neumann, N. Wentowski
DESY, Hamburg, Germany

There is a tendency to operate 4th generation SASE driven light sources at very low charge in order to further shorten the pulse length. Therefore the operation range of XFEL and FLASH II was extended to a charge range of as low as 20 pC to 1 nC. For a reliable charge measurement down to 20 pC, a low noise design of the signal chain from the monitor head to the digitizing ADC is necessary. This paper describes the steps taken in order to increase the sensitivity and dynamic range of the monitors currently used in the FLASH accelerator, and the basic theoretical background will be explained. Finally, first results are presented.

Poster MOPD65 [0.768 MB]

MOPD90

Cause Identification of Beam Losses in PETRA III by Time Correlation of Alarms

257

T. Lensch, M. Werner
DESY, Hamburg, Germany

PETRA III is a high brilliant synchrotron light-source operating at 6 GeV at the DESY site in Hamburg. The Machine Protection System (MPS) of PETRA III is under operation since the beginning of the commissioning of PETRA III in April 2009. Under certain alarm conditions the MPS generates a dump command and protects the machine against damage. As a functional extension the MPS hardware examines the time correlation of alarm sequences after a beam loss. The alarm sequences are evaluated in a software based system so that the cause of a beam loss can be displayed in the control room immediately. This paper describes the hardware implementation as well as the software rules.

Poster MOPD90 [0.548 MB]

Paper	Title	Page
MOPD65	Sensitivity Optimization of the Standard Beam Current Monitors for XFEL and FLASH II	197
	M. Werner, J. Lund-Nielsen, Re. Neumann, N. Wentowski DESY, Hamburg, Germany
	There is a tendency to operate 4th generation SASE driven light sources at very low charge in order to further shorten the pulse length. Therefore the operation range of XFEL and FLASH II was extended to a charge range of as low as 20 pC to 1 nC. For a reliable charge measurement down to 20 pC, a low noise design of the signal chain from the monitor head to the digitizing ADC is necessary. This paper describes the steps taken in order to increase the sensitivity and dynamic range of the monitors currently used in the FLASH accelerator, and the basic theoretical background will be explained. Finally, first results are presented.
	Poster MOPD65 [0.768 MB]

MOPD90	Cause Identification of Beam Losses in PETRA III by Time Correlation of Alarms	257
	T. Lensch, M. Werner DESY, Hamburg, Germany
	PETRA III is a high brilliant synchrotron light-source operating at 6 GeV at the DESY site in Hamburg. The Machine Protection System (MPS) of PETRA III is under operation since the beginning of the commissioning of PETRA III in April 2009. Under certain alarm conditions the MPS generates a dump command and protects the machine against damage. As a functional extension the MPS hardware examines the time correlation of alarm sequences after a beam loss. The alarm sequences are evaluated in a software based system so that the cause of a beam loss can be displayed in the control room immediately. This paper describes the hardware implementation as well as the software rules.
	Poster MOPD90 [0.548 MB]