Spatial coherence measurements of a 13.2 nm transient nickel-like cadmium soft x-ray laser pumped at grazing incidence

Liu, Y.; Wang, Y.; Larotonda, M. A.; Luther, B. M.; Rocca, J. J.; Attwood, David

doi:10.1364/oe.14.012872

Cited by 18 publications

(8 citation statements)

References 24 publications

(29 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, the transverse coherence diameter can be estimated to be in the order of ~8% of the beam diameter. This value agrees very well with a value of 1/20 beam diameters obtained by Liu and co-workers 29 for a fully saturated nickel-like Cd SXRL as well as the values obtained by Wang and co-workers 28 for an unseeded high-energy pumped nickel-like Mo SXRL and a neon-like Se SXRL 39 . These numbers further are comparable to the results reported for the FLASH XUV-FEL having a coherence relative transverse coherence diameter of ~6% for multi-shot accumulation 40 and ~40% for single shot exposure 41 .…”

Section: Coherence Of the Sxrlsupporting

confidence: 91%

“…There are only very few data sets concerning the transverse coherence of a single stage, and thus more easily realizable, SXRL pumped at moderate pump energies below 1 J (ref. 29). On the other hand, these systems are relatively attractive for applications requiring high average photon flux, since pump lasers with pulse energies below 1 J are easily scalable to repetition rates up to 200 Hz.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transverse Coherence Limited Coherent Diffraction Imaging using a Molybdenum Soft X-ray Laser Pumped at Moderate Pump Energies

Zürch

Jung²,

Scheffold

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Coherent diffraction imaging (CDI) in the extreme ultraviolet has become an important tool for nanoscale investigations. Laser-driven high harmonic generation (HHG) sources allow for lab scale applications such as cancer cell classification and phase-resolved surface studies. HHG sources exhibit excellent coherence but limited photon flux due poor conversion efficiency. In contrast, table-top soft X-ray lasers (SXRL) feature excellent temporal coherence and extraordinary high flux at limited transverse coherence. Here, the performance of a SXRL pumped at moderate pump energies is evaluated for CDI and compared to a HHG source. For CDI, a lower bound for the required mutual coherence factor of |μ 12| ≥ 0.75 is found by comparing a reconstruction with fixed support to a conventional characterization using double slits. A comparison of the captured diffraction signals suggests that SXRLs have the potential for imaging micron scale objects with sub-20 nm resolution in orders of magnitude shorter integration time compared to a conventional HHG source. Here, the low transverse coherence diameter limits the resolution to approximately 180 nm. The extraordinary high photon flux per laser shot, scalability towards higher repetition rate and capability of seeding with a high harmonic source opens a route for higher performance nanoscale imaging systems based on SXRLs.

show abstract

Section: Coherence Of the Sxrlsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Transverse Coherence Limited Coherent Diffraction Imaging using a Molybdenum Soft X-ray Laser Pumped at Moderate Pump Energies

Zürch

Jung²,

Scheffold

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The full angle beam divergence was measured to be 9.8± 0.5 mrad FWHM perpendicular to the target surface and 8.8± 0.5 mrad FWHM parallel to the target surface. The spatial coherence is expected to be similar to that reported in [18]. The SXR amplifier can be used to obtain pulses with full spatial and temporal coherence by employing the injection seeding technique demonstrated in [19].…”

supporting

confidence: 52%

High-energy 139 nm table-top soft-x-ray laser at 25 Hz repetition rate excited by a slab-pumped Ti:sapphire laser

et al. 2010

Self Cite

View full text Add to dashboard Cite

show abstract

“…The most popular metrology, however, is the double-slit technique (Ditmire et al, 1996;Liu et al, 2006;. Indeed, this diagnostic has intrinsic advantages such as: (i) the elimination of complex optical instrumentation and related aberrations, and (ii) rapid in situ readout.…”

Section: Introductionmentioning

confidence: 99%

Coherent X-ray beam metrology using 2D high-resolution Fresnel-diffraction analysis

Ruiz-Lopez

Faenov

Pikuz

et al. 2017

J Synchrotron Radiat

View full text Add to dashboard Cite

Direct metrology of coherent short-wavelength beamlines is important for obtaining operational beam characteristics at the experimental site. However, since beam-time limitation imposes fast metrology procedures, a multi-parametric metrology from as low as a single shot is desirable. Here a two-dimensional (2D) procedure based on high-resolution Fresnel diffraction analysis is discussed and applied, which allowed an efficient and detailed beamline characterization at the SACLA XFEL. So far, the potential of Fresnel diffraction for beamline metrology has not been fully exploited because its high-frequency fringes could be only partly resolved with ordinary pixel-limited detectors. Using the high-spatial-frequency imaging capability of an irradiated LiF crystal, 2D information of the coherence degree, beam divergence and beam quality factor M were retrieved from simple diffraction patterns. The developed beam metrology was validated with a laboratory reference laser, and then successfully applied at a beamline facility, in agreement with the source specifications.

show abstract

Spatial coherence measurements of a 13.2 nm transient nickel-like cadmium soft x-ray laser pumped at grazing incidence

Cited by 18 publications

References 24 publications

Transverse Coherence Limited Coherent Diffraction Imaging using a Molybdenum Soft X-ray Laser Pumped at Moderate Pump Energies

Transverse Coherence Limited Coherent Diffraction Imaging using a Molybdenum Soft X-ray Laser Pumped at Moderate Pump Energies

High-energy 139 nm table-top soft-x-ray laser at 25 Hz repetition rate excited by a slab-pumped Ti:sapphire laser

Coherent X-ray beam metrology using 2D high-resolution Fresnel-diffraction analysis

Contact Info

Product

Resources

About