BIW2012 - List of Authors (Wittenburg, K.)

Paper	Title	Page
MOPG007	XFEL Beam Loss Monitor System	35
	A. Kaukher, I. Krouptchenkov, D. Nölle, H. Tiessen, K. Wittenburg DESY, Hamburg, Germany
	The European XFEL will have a sophisticated Machine Protection System, including Beam Loss Monitors (BLMs). The monitors will detect losses of electron beam to protect the components of the XFEL from damage and excessive activation. For protection of undulators, BLMs with a scintillator rod will be used. BLMs at places with high radiation load will be equipped with fused silica rods. Beam dumps of the XFEL will be instrumented with glass-fiber BLMs. The BLMs were tested with an electron test-beam facility at DESY, as well as at FLASH. Due to large amounts of light produced by scintillator, no optical grease is needed, while the cathode potential of the R5900 PMT is 500-600 volt. Comparable signal from a prototype with a quartz glass was obtained with typically 150 volt higher cathode potential than that in the prototype with a scintillator. Unexpectedly slower rise and fall time of the signal has been observed, presumably due to radio-luminescence in the used quartz glass rod. Good operation of all three types of BLMs prototypes was obtained. We also plan to use the same types of BLMs for the FLASH II project. The current status of the XFEL BLM system development will be presented.

WEDP02	Highlights from DIPAC2011	253
	K. Wittenburg DESY, Hamburg, Germany
	The 10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators (DIPAC2011) was hosted by Deutsches Elektronen Synchrotron (DESY) and took place on board of the museum freighter Cap San Diego at the port in the city centre of Hamburg, Germany. The talks and poster sessions were held in the former cargo holds of the Cap San Diego which created a quite exciting atmosphere for such a workshop. This unusual venue and a very interesting program stimulated a record number of participants to join: 294 registered participants, 21 industrial exhibitor booths, 194 posters, 13 invited and 17 contributed talks and a visit of DESY formed a lively 3.5 days program with so many very high quality contributions that it becomes quite unfair to select only a few in this summary.

Paper

Title

Page

XFEL Beam Loss Monitor System

35

A. Kaukher, I. Krouptchenkov, D. Nölle, H. Tiessen, K. Wittenburg
DESY, Hamburg, Germany

The European XFEL will have a sophisticated Machine Protection System, including Beam Loss Monitors (BLMs). The monitors will detect losses of electron beam to protect the components of the XFEL from damage and excessive activation. For protection of undulators, BLMs with a scintillator rod will be used. BLMs at places with high radiation load will be equipped with fused silica rods. Beam dumps of the XFEL will be instrumented with glass-fiber BLMs. The BLMs were tested with an electron test-beam facility at DESY, as well as at FLASH. Due to large amounts of light produced by scintillator, no optical grease is needed, while the cathode potential of the R5900 PMT is 500-600 volt. Comparable signal from a prototype with a quartz glass was obtained with typically 150 volt higher cathode potential than that in the prototype with a scintillator. Unexpectedly slower rise and fall time of the signal has been observed, presumably due to radio-luminescence in the used quartz glass rod. Good operation of all three types of BLMs prototypes was obtained. We also plan to use the same types of BLMs for the FLASH II project. The current status of the XFEL BLM system development will be presented.

WEDP02

Highlights from DIPAC2011

253

K. Wittenburg
DESY, Hamburg, Germany

The 10th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators (DIPAC2011) was hosted by Deutsches Elektronen Synchrotron (DESY) and took place on board of the museum freighter Cap San Diego at the port in the city centre of Hamburg, Germany. The talks and poster sessions were held in the former cargo holds of the Cap San Diego which created a quite exciting atmosphere for such a workshop. This unusual venue and a very interesting program stimulated a record number of participants to join: 294 registered participants, 21 industrial exhibitor booths, 194 posters, 13 invited and 17 contributed talks and a visit of DESY formed a lively 3.5 days program with so many very high quality contributions that it becomes quite unfair to select only a few in this summary.