Soft X-ray Emission Spectroscopy at ESRF Beamline 26 Based on a Helical Undulator

Dallera, C.; Puppin, E.; Trezzi, G.; Incorvaia, N.; Fasana, Alessandro; Braicovich, L.; Brookes, N. B.; Goedkoop, J. B.

doi:10.1107/s0909049596006061

Cited by 65 publications

(28 citation statements)

References 7 publications

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“…The device presented below has been realized for the AXES spectrometer 15 ; after several refurbishments 16,22 this instrument, based on a variable line-density spherical grating and a CCD detector, has at present a resolving power E/ΔE = 4000-4500 (at 930 eV), corresponding to about 3500 when combined with the beamline monochromator. As shown in Fig.…”

Section: A the Spectrometermentioning

confidence: 99%

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The simultaneous measurement of energy and linear polarization of the scattered radiation in resonant inelastic soft x-ray scattering

Braicovich

Minola

Dellea

et al. 2014

Review of Scientific Instruments

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Resonant Inelastic X-ray Scattering (RIXS) in the soft x-ray range is an element-specific energyloss spectroscopy used to probe the electronic and magnetic excitations in strongly correlated solids. In the recent years, RIXS has been progressing very quickly in terms of energy resolution and understanding of the experimental results, but the interpretation of spectra could further improve, sometimes decisively, from a full knowledge of the polarization of incident and scattered photons. Here we present the first implementation, in a high resolution RIXS spectrometer used to analyze the scattered radiation, of a device allowing the measurement of the degree of linear polarization. The system, based on a graded W/B 4 C multilayer mirror installed in proximity of the CCD detector, has been installed on the AXES spectrometer at the ESRF; it has been fully characterized and it has been used for a demonstration experiment at the Cu L 3 edge on a high-Tc superconducting cuprate. The loss in efficiency suffered by the spectrometer equipped with this test facility was a factor 17.5. We propose also a more advanced version, suitable for a routine use on the next generation of RIXS spectrometers and with an overall efficiency up to 10%.

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Section: A the Spectrometermentioning

confidence: 99%

“…i) A pilot experiment done with the AXES spectrometer 15,16 at the beamline ID08 of the ESRF, which has led to unique and important results. The equipment is finalized to the Cu-L 3 edge (930 eV) but is sufficiently tunable to cover Cu in different compounds and different ionization states.…”

Section: Introductionmentioning

confidence: 99%

The simultaneous measurement of energy and linear polarization of the scattered radiation in resonant inelastic soft x-ray scattering

Braicovich

Minola

Dellea

et al. 2014

Review of Scientific Instruments

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“…The hole concentration was optimized by annealing the samples in N 2 flow. The RIXS measurements were performed with the AXES spectrometer at the beamline ID08 of the European Synchrotron Radiation Facility (ESRF) [32]. We used the incident photon energy of ∼931 eV, at the maximum of the Cu L 3 absorption peak (2p 3/2 → 3d transition).…”

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Direct observation of bulk charge modulations in optimally dopedBi1.5Pb0.6Sr1.54CaCu2O8+

et al. 2014

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Bulk charge density modulations, recently observed in high critical-temperature (Tc) cuprate superconductors, coexist with the so-called pseudogap and compete with superconductivity. However, its direct observation has been limited to a narrow doping region in the underdoped regime. Using energy-resolved resonant x-ray scattering we have found evidence for such bulk charge modulations, or soft collective charge modes (soft CCMs), in optimally doped Bi1.5Pb0.6Sr1.54CaCu2O 8+δ (Pb-Bi2212) around the summit of the superconducting dome with momentum transfer q ∼ 0.28 reciprocal lattice units (r.l.u.) along the Cu-O bond direction. The signal is stronger at T ≃ Tc than at lower temperatures, thereby confirming a competition between soft CCMs and superconductivity. These results demonstrate that soft CCMs are not constrained to the underdoped regime, suggesting that soft CCMs appear across a large part of the phase diagram of cuprates and are intimately entangled with high-Tc superconductivity.

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“…[5][6][7][8][9][10][11][12][13] In recent years, new high resolution soft X-ray spectrometers based on varied line spacing gratings have been build. [20][21][22][23][24][25] Some are even able to resolve vibrational states in the spectrum. 26 Yet, they are huge setups with detector arm length of up to 5 m. 22 Future spectrometer projects are even planned with detector arm length up to 15 m with the aim to reach higher resolving power.…”

Section: Introductionmentioning

confidence: 99%

A new compact soft x-ray spectrometer for resonant inelastic x-ray scattering studies at PETRA III

Yin

Peters

Hahn

et al. 2015

Review of Scientific Instruments

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(Received XXXXX; accepted XXXXX; published online XXXXX) (Dates appearing here are provided by the Editorial Office)We present a newly designed compact grating spectrometer for the energy range from 210 eV to 1250 eV, which would include the Kα 1,2 emission lines of vital elements like C, N and O. The spectrometer is based on a grazing incidence spherical varied line spacing (VLS) grating with 2400 l/mm at its center and a radius of curvature of 58542 mm. First results show a resolving power of around 1000 at an energy of 550 eV and a working spectrometer for high vacuum (10 -4 mbar) environment without losing photon intensity.

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Soft X-ray Emission Spectroscopy at ESRF Beamline 26 Based on a Helical Undulator

Cited by 65 publications

References 7 publications

The simultaneous measurement of energy and linear polarization of the scattered radiation in resonant inelastic soft x-ray scattering

The simultaneous measurement of energy and linear polarization of the scattered radiation in resonant inelastic soft x-ray scattering

Direct observation of bulk charge modulations in optimally dopedBi1.5Pb0.6Sr1.54CaCu2O8+

A new compact soft x-ray spectrometer for resonant inelastic x-ray scattering studies at PETRA III

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