First results from the online variable line spacing grating spectrometer at FLASH

Brenner, Günter; Kapitzki, Svea; Kuhlmann, Marion; Ploenjes, Elke; Noll, T.; Siewert, Frank; Treusch, R.; Tiedtke, K.; Reininger, R.; Roper, Mark; Bowler, M. A.; Quinn, F. M.; Feldhaus, J.

doi:10.1016/j.nima.2010.09.134

Cited by 38 publications

(32 citation statements)

References 17 publications

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“…In parallel to the operation, upgrades and developments of the beamline continue. For example, we plan to install an arrival-timing monitor between soft X-ray FEL and optical laser pulses (Maltezopoulos et al, 2008;Harmand et al, 2013;Katayama et al, 2016), and a nondestructive spectrometer (Frassetto et al, 2008;Brenner et al, 2011) at the experimental station. We will also expand the diameter of the orifices to 10 mm in the transport channel in order to improve the beam profile with increased transmission in long-wavelength regions.…”

Section: Conclusion and Perspectivementioning

confidence: 99%

A soft X-ray free-electron laser beamline at SACLA: the light source, photon beamline and experimental station

et al. 2018

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The design and performance of a soft X-ray free-electron laser (FEL) beamline of the SPring-8 Compact free-electron LAser (SACLA) are described. The SPring-8 Compact SASE Source test accelerator, a prototype machine of SACLA, was relocated to the SACLA undulator hall for dedicated use for the soft X-ray FEL beamline. Since the accelerator is operated independently of the SACLA main linac that drives the two hard X-ray beamlines, it is possible to produce both soft and hard X-ray FEL simultaneously. The FEL pulse energy reached 110 mJ at a wavelength of 12.4 nm (i.e. photon energy of 100 eV) with an electron beam energy of 780 MeV.

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Section: Conclusion and Perspectivementioning

confidence: 99%

A soft X-ray free-electron laser beamline at SACLA: the light source, photon beamline and experimental station

et al. 2018

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“…This is suitable to the needs to clearly distinguish the pulses with a separation of 1 µs at the highest possible frequency of 1 MHz and to transfer the light to the detector outside the vacuum. According to experiences with other spectrometers and monitors using Ce:YAG crystals for indirect beam detection, 26,39,40 a crystal of such thickness does not show saturation effects at the expected photon flux or blurring, which could result in reduced energy resolution.…”

Section: Setupmentioning

confidence: 99%

“…The instruments used are the Gas Monitor Detector (GMD), 22,41 a VLS grating spectrometer, 40 a transparent experiment (EXP), and the GOTTHARD spectrometer (GHS). In our case, the transparent experiment was a PES/PIS chamber for gaseous targets.…”

Section: Setupmentioning

confidence: 99%

Spectrometer for shot-to-shot photon energy characterization in the multi-bunch mode of the free electron laser at Hamburg

Palutke

Gerken

Mertens

et al. 2015

Review of Scientific Instruments

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The setup and first results from commissioning of a fast online photon energy spectrometer for the vacuum ultraviolet free electron laser at Hamburg (FLASH) at DESY are presented. With the use of the latest advances in detector development, the presented spectrometer reaches readout frequencies up to 1 MHz. In this paper, we demonstrate the ability to record online photon energy spectra on a shot-to-shot base in the multi-bunch mode of FLASH. Clearly resolved shifts in the mean wavelength over the pulse train as well as shot-to-shot wavelength fluctuations arising from the statistical nature of the photon generating self-amplified spontaneous emission process have been observed. In addition to an online tool for beam calibration and photon diagnostics, the spectrometer enables the determination and selection of spectral data taken with a transparent experiment up front over the photon energy of every shot. This leads to higher spectral resolutions without the loss of efficiency or photon flux by using single-bunch mode or monochromators.

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“…Several methods have been developed at FLASH and are in use to determine the pulse energy (Tiedtke et al, 2008), the spectrum (Brenner et al, 2011 and the arrival time of the electron bunches (Angelovski et al, 2012). However, the XUV pulse duration still lacks an appropriate reliable detector.…”

Section: Introductionmentioning

confidence: 99%

FLASH free-electron laser single-shot temporal diagnostic: terahertz-field-driven streaking

et al. 2018

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The commissioning of a terahertz-field-driven streak camera installed at the free-electron laser (FEL) FLASH at DESY in Hamburg, being able to deliver photon pulse duration as well as arrival time information with $ 10 fs resolution for each single XUV FEL pulse, is reported. Pulse durations between 300 fs and <15 fs have been measured for different FLASH FEL settings. A comparison between the XUV pulse arrival time and the FEL electron bunch arrival time measured at the FLASH linac section exhibits a correlation width of 20 fs r.m.s., thus demonstrating the excellent operation stability of FLASH. In addition, the terahertz-streaking setup was operated simultaneously to an alternative method to determine the FEL pulse duration based on spectral analysis. FLASH pulse duration derived from simple spectral analysis is in good agreement with that from terahertz-streaking measurement.

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First results from the online variable line spacing grating spectrometer at FLASH

Cited by 38 publications

References 17 publications

A soft X-ray free-electron laser beamline at SACLA: the light source, photon beamline and experimental station

A soft X-ray free-electron laser beamline at SACLA: the light source, photon beamline and experimental station

Spectrometer for shot-to-shot photon energy characterization in the multi-bunch mode of the free electron laser at Hamburg

FLASH free-electron laser single-shot temporal diagnostic: terahertz-field-driven streaking

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