| Paper |
Title |
Page |
| WEPPH003 |
Magnetic Measurements of the FLASH Infrared Undulator
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318 |
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- A. Chesnov, E. A. Matushevsky, D. Petrov, E. Syresin, N. A. Morozov
JINR, Dubna, Moscow Region
- O. Grimm, Y. Holler
DESY, Hamburg
- J. Rossbach
Uni HH, Hamburg
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The FLASH free-electron laser at DESY, Hamburg, will be equipped with an infrared electromagnetic undulator during the current shut-down, providing radiation in the range 1-200 um. It will be used both for electron beam diagnostics purposes and as a powerful source synchronized to the VUV and soft X-ray pulses of the FEL. The undulator was constructed at the Joint Institute of Nuclear Research (JINR). This paper summarizes the extensive magnetic measurements that where performed both at JINR and DESY prior to installation of the undulator.
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| WEPPH007 |
MCP-based Photon Detector with Extended Wavelength Range for FLASH
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334 |
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- O. I. Brovko, D. Kharlamov, E. A. Matyushevskiy, A. V. Shabunov
JINR/LHE, Moscow
- J. Feldhaus, U. Hahn, M. Hesse, U. Jastrow, V. Kocharyan, P. Radcliffe, E. Saldin, E. Schneidmiller, K. I. Tiedtke, R. Treusch, M. V. Yurkov, N. von Bargen, L. Bittner
DESY, Hamburg
- V. I. Lokhmatov, E. Syresin
JINR, Dubna, Moscow Region
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Experimental experience gained at the extreme ultraviolet SASE FEL FLASH (DESY, Hamburg) has shown that successful operation of the facility strongly depends on the quality of the radiation detectors. Here key issues are: wide wavelength range (6 to 100 nm for FLASH), wide dynamic range (from the level of spontaneous emission to the saturation level), and high relative accuracy of measurements which is crucial for detection of a signature of amplification and characterization of statistical properties of the radiation. In this report we describe MCP-based radiation detector for FLASH which meets these requirements. Key element of the detector is wide dynamic range micro-channel plate (MCP) which detects scattered radiation from a target. With five different targets and MCPs in combination with optical attenuators present detector covers operating wavelength range from 6 to 100 nm, and dynamic range of the radiation intensities, from the level of spontaneous emission up to the saturation level of SASE FEL.
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