FEL2013 - List of Keywords (instrumentation)

Paper	Title	Other Keywords	Page
TUPSO27	Design for a Fast, XFEL-Quality Wire Scanner	photon, radiation, vacuum, electron	276
	M.A. Harrison, R.B. Agustsson, T.J. Campese, P.S. Chang, A.Y. Murokh, M. Ruelas RadiaBeam, Santa Monica, USA
	RadiaBeam Technologies has designed and manufactured a new wire scanner for high-speed emittance measurements of XFEL-type beams of energy 139 MeV. Using three 25-micron thick tungsten wires, this wire scanner measures vertical and horizontal beam size as well as transverse spatial correlation in one pass. The intensity of the beam at a wire position is determined from emitted bremsstrahlung photons as measured by a BGO scintillator system. The wires are transported on a two-ended support structure moved by a ball-screw linear stage. The double-ended structure reduces vibrations in the wire holder, and the two-bellows design negates the effects of air pressure on the motion. The expected minimum beam size measurable by this system is on the order of 10 microns with 0.1-micron accuracy. To achieve this, new algorithms are presented that reduce the effect of the non-zero thickness of the wire on the wire scan output. In addition, novel calculations are presented for determining the elliptical geometric parameters (vertical and horizontal beam size and correlation, or alternatively, the axis lengths and rotation) of the beam from the wire scanner measurements.

WEPSO56	Optical Design and Time-dependent Wavefront Propagation Simulation for a Hard X-Ray Split- and delay-unit for the European XFEL	photon, simulation, FEL, undulator	627
	S. Roling, B. Siemer, F. Wahlert, M. Wöstmann, H. Zacharias Universität Muenster, Physikalisches Institut, Muenster, Germany S. Braun, P. Gawlitza Fraunhofer IWS, Dresden, Germany O.V. Chubar BNL, Upton, Long Island, New York, USA L. Samoylova, H. Sinn XFEL. EU, Hamburg, Germany E. Schneidmiller, M.V. Yurkov DESY, Hamburg, Germany F. Siewert HZB, Berlin, Germany E. Ziegler ESRF, Grenoble, France
	For the European XFEL an x-ray split- and delay-unit (SDU) is built covering photon energies from 5 keV up to 20 keV. This SDU will enable time-resolved x-ray pump / x-ray probe experiments as well as sequential diffractive imaging on a femtosecond to picosecond time scale. The wavefront of the x-ray FEL pulses will be split by an edge of a silicon mirror coated with Mo/B4C and W/B4C multilayers. Both partial beams will then pass variable delay lines. For different wavelengths the angle of incidence onto the multilayer mirrors will be adjusted in order to match the Bragg condition. Hence, maximum delays between ± 2.5 ps at hν = 20 keV and up to ± 33 ps at hν = 5 keV will be possible. The time-dependent wave-optics simulations have been done with SRW software, for the fundamental and the 3rd harmonic. The XFEL radiation was simulated both in the Gaussian approximation as well as using an output of time-dependent SASE code FAST. Main features of the optical layout, including diffraction on the splitter edge, and optics imperfections were taken into account. Impact of these effects on the possibility to characterize spatial-temporal properties of FEL pulses are analyzed.

WEPSO88	High Precision Electronics for Single Pass Applications	linac, controls, alignment, pick-up	715
	M. Žnidarčič, R. Hrovatin I-Tech, Solkan, Slovenia M. Satoh KEK, Ibaraki, Japan
	Monitoring and subsequent optimization of electron Linacs and transfer lines requires specific instrumentation for beam position data acquisition and processing. Libera Single Pass E is the newly developed instrument intended for position and charge monitoring in basic and multi-mode operation LINACs. Development, initial measurements and verification of the instrumentation performance were conducted in the Instrumentation Technologies' laboratories, followed by the characterization measurements of the unit carried out at KEK Linac facility.

Paper

Title

Other Keywords

Page

TUPSO27

Design for a Fast, XFEL-Quality Wire Scanner

photon, radiation, vacuum, electron

276

M.A. Harrison, R.B. Agustsson, T.J. Campese, P.S. Chang, A.Y. Murokh, M. Ruelas
RadiaBeam, Santa Monica, USA

RadiaBeam Technologies has designed and manufactured a new wire scanner for high-speed emittance measurements of XFEL-type beams of energy 139 MeV. Using three 25-micron thick tungsten wires, this wire scanner measures vertical and horizontal beam size as well as transverse spatial correlation in one pass. The intensity of the beam at a wire position is determined from emitted bremsstrahlung photons as measured by a BGO scintillator system. The wires are transported on a two-ended support structure moved by a ball-screw linear stage. The double-ended structure reduces vibrations in the wire holder, and the two-bellows design negates the effects of air pressure on the motion. The expected minimum beam size measurable by this system is on the order of 10 microns with 0.1-micron accuracy. To achieve this, new algorithms are presented that reduce the effect of the non-zero thickness of the wire on the wire scan output. In addition, novel calculations are presented for determining the elliptical geometric parameters (vertical and horizontal beam size and correlation, or alternatively, the axis lengths and rotation) of the beam from the wire scanner measurements.

WEPSO56

Optical Design and Time-dependent Wavefront Propagation Simulation for a Hard X-Ray Split- and delay-unit for the European XFEL

photon, simulation, FEL, undulator

627

S. Roling, B. Siemer, F. Wahlert, M. Wöstmann, H. Zacharias
Universität Muenster, Physikalisches Institut, Muenster, Germany
S. Braun, P. Gawlitza
Fraunhofer IWS, Dresden, Germany
O.V. Chubar
BNL, Upton, Long Island, New York, USA
L. Samoylova, H. Sinn
XFEL. EU, Hamburg, Germany
E. Schneidmiller, M.V. Yurkov
DESY, Hamburg, Germany
F. Siewert
HZB, Berlin, Germany
E. Ziegler
ESRF, Grenoble, France

For the European XFEL an x-ray split- and delay-unit (SDU) is built covering photon energies from 5 keV up to 20 keV. This SDU will enable time-resolved x-ray pump / x-ray probe experiments as well as sequential diffractive imaging on a femtosecond to picosecond time scale. The wavefront of the x-ray FEL pulses will be split by an edge of a silicon mirror coated with Mo/B4C and W/B4C multilayers. Both partial beams will then pass variable delay lines. For different wavelengths the angle of incidence onto the multilayer mirrors will be adjusted in order to match the Bragg condition. Hence, maximum delays between ± 2.5 ps at hν = 20 keV and up to ± 33 ps at hν = 5 keV will be possible. The time-dependent wave-optics simulations have been done with SRW software, for the fundamental and the 3rd harmonic. The XFEL radiation was simulated both in the Gaussian approximation as well as using an output of time-dependent SASE code FAST. Main features of the optical layout, including diffraction on the splitter edge, and optics imperfections were taken into account. Impact of these effects on the possibility to characterize spatial-temporal properties of FEL pulses are analyzed.

WEPSO88

High Precision Electronics for Single Pass Applications

linac, controls, alignment, pick-up

715

M. Žnidarčič, R. Hrovatin
I-Tech, Solkan, Slovenia
M. Satoh
KEK, Ibaraki, Japan

Monitoring and subsequent optimization of electron Linacs and transfer lines requires specific instrumentation for beam position data acquisition and processing. Libera Single Pass E is the newly developed instrument intended for position and charge monitoring in basic and multi-mode operation LINACs. Development, initial measurements and verification of the instrumentation performance were conducted in the Instrumentation Technologies' laboratories, followed by the characterization measurements of the unit carried out at KEK Linac facility.