IBIC2014 - List of Authors (Lipka, D.)

Paper	Title	Page
TUPF07	FLASH Undulator BPM Commissioning and Beam Characterization Results	315
	D. Lipka, N. Baboi, D. Nölle, G. Petrosyan, S. Vilcins DESY, Hamburg, Germany R. Baldinger, R. Ditter, B. Keil, W. Koprek, R. Kramert, G. Marinkovic, M. Roggli, M. Stadler PSI, Villigen PSI, Switzerland
	Recently, the commissioning of FLASH2 has started, a new soft X-ray FEL undulator line at the DESY FLASH facility. In the FLASH2 undulator intersections, the beam positions are measured by 17 cavity beam position monitor (CBPM) pick-ups and electronics* developed for the European XFEL (E-XFEL). In addition four CBPMs are available at FLASH1 for test and development. The new CBPM system enables an unprecedented position and charge resolution at FLASH, thus allowing further analysis and optimization of the FLASH beam quality and overall accelerator performance. Results of first beam measurements as well as correlations with other FLASH diagnostics systems are reported. * M. Stadler et al., “Low-Q Cavity BPM Electronics for E-XFEL, FLASH-2 and SwissFEL”, this conference.
	Poster TUPF07 [1.112 MB]
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TUPF11	Mechanical Design of Cryogenic Vacuum Feedthroughs for X-FEL Button BPMs	332
	S. Vilcins, D. Lipka DESY, Hamburg, Germany
	The European XFEL is a 4th generation synchrotron radiation source, currently under construction in Hamburg. Based on different Free-Electron Laser and spontaneous sources and driven by a superconducting accelerator, it will be able to provide several user stations with photons simultaneously. Due to the superconducting technology in the accelerators modules many components have to operate at liquid helium temperature. This poster will concentrate on high frequency ultra high vacuum feedthrough used for the beam position monitors of the cryogenic accelerator modules. Main emphasis will be put on the design of these feedthroughs, their material composition and the production process. The capability to be used under these very special conditions was investigated with FEM simulations, as well as with a test procedure. The results of these simulations will be presented; the tests and their results will be explained in detail.
	Poster TUPF11 [0.407 MB]
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WEPD11	Beam-Based Calibration and Performance Optimization of Cavity BPMs for SwissFEL, E-XFEL and FLASH2	665
	B. Keil, G. Marinkovic, M. Stadler PSI, Villigen PSI, Switzerland D. Lipka DESY, Hamburg, Germany
	Funding: Part of this work was funded by the Swiss State Secretariat for Education, Research and Innovation (SERI). SwissFEL, the European XFEL (E-XFEL) and FLASH2 all use dual-resonator cavity beam position monitors (CBPMs). The CBPM electronics that is built by PSI has a larger number of calibration parameters that need to be determined in order to maximize the CBPM system performance. Beam measurements with the BPM electronics have been made in BPM test areas at the SwissFEL test injector and FLASH, as well as at FLASH2 where 17 E-XFEL type CBPMs have recently been installed in the undulator intersections [,]. The CBPMs are pre-calibrated in the lab using an automated test and calibration system [], and then the final calibration is done with beam. This report discusses beam-based methods to optimize the system performance by improving the pre-beam system calibration as well as the mechanical alignment of the pickup position and angle. D. Lipka et al., "FLASH Undulator BPM Commissioning and Beam Characterization Results", IBIC'14 ** M. Stadler et al., "Low-Q Cavity BPM Electronics for E-XFEL, FLASH-II and SwissFEL", IBIC'14
	Poster WEPD11 [0.445 MB]
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WEPD12	Low-Q Cavity BPM Electronics for E-XFEL, FLASH-II and SwissFEL	670
	M. Stadler, R. Baldinger, R. Ditter, B. Keil, F. Marcellini, G. Marinkovic, M. Roggli, M. Rohrer PSI, Villigen PSI, Switzerland D. Lipka, D. Nölle, S. Vilcins DESY, Hamburg, Germany
	PSI has developed BPM electronics for low-Q cavity BPMs that will be used in the E-XFEL and FLASH-II undulators, as well as in SwissFEL injector, linac and transfer lines. After beam tests at the SwissFEL test injector and FLASH, a pre-series of the electronics has been produced, tested and commissioned at FLASH-II [1]. The design, system features, signal processing techniques, lab-based test and calibration system as well as latest measurement results are reported.
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Paper

Title

Page

FLASH Undulator BPM Commissioning and Beam Characterization Results

315

D. Lipka, N. Baboi, D. Nölle, G. Petrosyan, S. Vilcins
DESY, Hamburg, Germany
R. Baldinger, R. Ditter, B. Keil, W. Koprek, R. Kramert, G. Marinkovic, M. Roggli, M. Stadler
PSI, Villigen PSI, Switzerland

Recently, the commissioning of FLASH2 has started, a new soft X-ray FEL undulator line at the DESY FLASH facility. In the FLASH2 undulator intersections, the beam positions are measured by 17 cavity beam position monitor (CBPM) pick-ups and electronics* developed for the European XFEL (E-XFEL). In addition four CBPMs are available at FLASH1 for test and development. The new CBPM system enables an unprecedented position and charge resolution at FLASH, thus allowing further analysis and optimization of the FLASH beam quality and overall accelerator performance. Results of first beam measurements as well as correlations with other FLASH diagnostics systems are reported.
* M. Stadler et al., “Low-Q Cavity BPM Electronics for E-XFEL, FLASH-2 and SwissFEL”, this conference.

Poster TUPF07 [1.112 MB]

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TUPF11

Mechanical Design of Cryogenic Vacuum Feedthroughs for X-FEL Button BPMs

332

S. Vilcins, D. Lipka
DESY, Hamburg, Germany

The European XFEL is a 4th generation synchrotron radiation source, currently under construction in Hamburg. Based on different Free-Electron Laser and spontaneous sources and driven by a superconducting accelerator, it will be able to provide several user stations with photons simultaneously. Due to the superconducting technology in the accelerators modules many components have to operate at liquid helium temperature. This poster will concentrate on high frequency ultra high vacuum feedthrough used for the beam position monitors of the cryogenic accelerator modules. Main emphasis will be put on the design of these feedthroughs, their material composition and the production process. The capability to be used under these very special conditions was investigated with FEM simulations, as well as with a test procedure. The results of these simulations will be presented; the tests and their results will be explained in detail.

Poster TUPF11 [0.407 MB]

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WEPD11

Beam-Based Calibration and Performance Optimization of Cavity BPMs for SwissFEL, E-XFEL and FLASH2

665

B. Keil, G. Marinkovic, M. Stadler
PSI, Villigen PSI, Switzerland
D. Lipka
DESY, Hamburg, Germany

Funding: Part of this work was funded by the Swiss State Secretariat for Education, Research and Innovation (SERI).
SwissFEL, the European XFEL (E-XFEL) and FLASH2 all use dual-resonator cavity beam position monitors (CBPMs). The CBPM electronics that is built by PSI has a larger number of calibration parameters that need to be determined in order to maximize the CBPM system performance. Beam measurements with the BPM electronics have been made in BPM test areas at the SwissFEL test injector and FLASH, as well as at FLASH2 where 17 E-XFEL type CBPMs have recently been installed in the undulator intersections [*,**]. The CBPMs are pre-calibrated in the lab using an automated test and calibration system [**], and then the final calibration is done with beam. This report discusses beam-based methods to optimize the system performance by improving the pre-beam system calibration as well as the mechanical alignment of the pickup position and angle.
* D. Lipka et al., "FLASH Undulator BPM Commissioning and Beam Characterization Results", IBIC'14
** M. Stadler et al., "Low-Q Cavity BPM Electronics for E-XFEL, FLASH-II and SwissFEL", IBIC'14

Poster WEPD11 [0.445 MB]

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WEPD12

Low-Q Cavity BPM Electronics for E-XFEL, FLASH-II and SwissFEL

670

M. Stadler, R. Baldinger, R. Ditter, B. Keil, F. Marcellini, G. Marinkovic, M. Roggli, M. Rohrer
PSI, Villigen PSI, Switzerland
D. Lipka, D. Nölle, S. Vilcins
DESY, Hamburg, Germany

PSI has developed BPM electronics for low-Q cavity BPMs that will be used in the E-XFEL and FLASH-II undulators, as well as in SwissFEL injector, linac and transfer lines. After beam tests at the SwissFEL test injector and FLASH, a pre-series of the electronics has been produced, tested and commissioned at FLASH-II [1]. The design, system features, signal processing techniques, lab-based test and calibration system as well as latest measurement results are reported.

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