New compounds consisting of xanthenone and thioxanthenone derivatives are synthesized and the photophysical properties of the compounds are discussed in detail. The difference between singlet and triplet energies was obtained at 0.09 and 0.37 eV (at low temperature). Furthermore, the logarithm of the laser power versus the logarithm of the PL intensity showed a slope of less than 1, and the compounds exhibit thermally activated delayed fluorescence (TADF). In addition, the photoluminescence quantum yield of the spin-coated films was gained 51.83 and 41.22%, respectively. The powder X-ray diffraction of the grinded (under the force) compounds and also the PL spectrum of the compounds were shifted and the compounds were mechanochromic when the color of the compounds was changed. The ionization potential of the compounds showed (5.49 and 5.62 eV) that the compounds were well suited for using in the fabrication of OLED devices as an emitter layer. The performance of the OLEDs was investigated and the maximum brightness and external quantum efficiency were found to be 44573 cdm-2 and 12.61%, respectively.
{"title":"Mechanochromic luminescent derivatives based on xanthenone and thioxanthenone for the fabrication of OLED devices as emitter layer","authors":"S. Nasiri, G. Janusas","doi":"10.1117/12.2668347","DOIUrl":"https://doi.org/10.1117/12.2668347","url":null,"abstract":"New compounds consisting of xanthenone and thioxanthenone derivatives are synthesized and the photophysical properties of the compounds are discussed in detail. The difference between singlet and triplet energies was obtained at 0.09 and 0.37 eV (at low temperature). Furthermore, the logarithm of the laser power versus the logarithm of the PL intensity showed a slope of less than 1, and the compounds exhibit thermally activated delayed fluorescence (TADF). In addition, the photoluminescence quantum yield of the spin-coated films was gained 51.83 and 41.22%, respectively. The powder X-ray diffraction of the grinded (under the force) compounds and also the PL spectrum of the compounds were shifted and the compounds were mechanochromic when the color of the compounds was changed. The ionization potential of the compounds showed (5.49 and 5.62 eV) that the compounds were well suited for using in the fabrication of OLED devices as an emitter layer. The performance of the OLEDs was investigated and the maximum brightness and external quantum efficiency were found to be 44573 cdm-2 and 12.61%, respectively.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"249 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128429441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The study of optical properties of various photonic band gap (PBGs) structures, focused on the in-plane propagation of 2D-PCs PBGs which are most applied in micro-fabrication and optical integration. These devices provide many novel and useful properties, such as lossless confinement of light mode, high-Q microcavity, linear waveguiding in low index material, low-loss bending, high efficiency resonant tunneling process to transfer energy between defects etc. The parameter interplay on the band gap formation is discussed first, then light modes in ideal bulk PCs are investigated.as finally, interaction between defects crucial to planar device designs. The comparison between the slab with air holes as with microcolumns confirmed that the surface recombination will be smaller in columns as that in air holes when assuming a constant filling factor of semiconductor. The photonic crystals in a square or hexagonal lattice as air holes on silicon on insulator (SOI) layers obtained bandgap centered on the wavelength of 1.55 μm, the spectral region for optical communications. By applications of computational methods like Finite Difference Time Domain (FDTD) could be determined the bandgap of the structure and computed transmission and reflection properties of system.
{"title":"The comparative analysis of 2D photonic crystals applications based on specific modeling/simulation results","authors":"D. Ulieru, O. Ulieru","doi":"10.1117/12.2665488","DOIUrl":"https://doi.org/10.1117/12.2665488","url":null,"abstract":"The study of optical properties of various photonic band gap (PBGs) structures, focused on the in-plane propagation of 2D-PCs PBGs which are most applied in micro-fabrication and optical integration. These devices provide many novel and useful properties, such as lossless confinement of light mode, high-Q microcavity, linear waveguiding in low index material, low-loss bending, high efficiency resonant tunneling process to transfer energy between defects etc. The parameter interplay on the band gap formation is discussed first, then light modes in ideal bulk PCs are investigated.as finally, interaction between defects crucial to planar device designs. The comparison between the slab with air holes as with microcolumns confirmed that the surface recombination will be smaller in columns as that in air holes when assuming a constant filling factor of semiconductor. The photonic crystals in a square or hexagonal lattice as air holes on silicon on insulator (SOI) layers obtained bandgap centered on the wavelength of 1.55 μm, the spectral region for optical communications. By applications of computational methods like Finite Difference Time Domain (FDTD) could be determined the bandgap of the structure and computed transmission and reflection properties of system.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126905779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anna De Girolamo Del Mauro, F. Loffredo, F. Villani, M. F. Caso, T. Fasolino, A. Vestri, D. Sagnelli, Amalia D'Avino, L. Petti, G. Nenna
In this work, we developed and characterized composites prepared by dispersing conductive carbon black (CB) at different concentrations in an azobenzene-based photomobile polymer (azo-PMP) matrix. This polymer can move under UV-blue light because its azobenzene moieties undergo a reversible photoisomerization from trans to cis configuration and this nanoscopic structural movement induces a macroscopic movement in the film. We studied the possibility to modify the photomobile properties of azo-PMP by introducing different concentrations of CB (from 0wt.% up to 1wt.%) and we investigated morphology, optical properties and photomobile behaviour at different wavelengths. Optical analysis by polarized light shows that the films with CB concentrations up to 0.1wt.% are quite homogeneous and still present birefringence properties. Photoresponsivity measurements at wavelengths in the range 457-747nm were studied to investigate how the presence of the CB affects the photomobile response inside and outside the absorption spectral region of azo-polymers. Choosing appropriately the CB concentration, we demonstrated that it is possible to enlarge the usable spectral bandwidth of the samples in visible region towards the visible and near infrared spectral region.
{"title":"Visible photomobile response of azobenzene-based polymer/carbon black films","authors":"Anna De Girolamo Del Mauro, F. Loffredo, F. Villani, M. F. Caso, T. Fasolino, A. Vestri, D. Sagnelli, Amalia D'Avino, L. Petti, G. Nenna","doi":"10.1117/12.2666618","DOIUrl":"https://doi.org/10.1117/12.2666618","url":null,"abstract":"In this work, we developed and characterized composites prepared by dispersing conductive carbon black (CB) at different concentrations in an azobenzene-based photomobile polymer (azo-PMP) matrix. This polymer can move under UV-blue light because its azobenzene moieties undergo a reversible photoisomerization from trans to cis configuration and this nanoscopic structural movement induces a macroscopic movement in the film. We studied the possibility to modify the photomobile properties of azo-PMP by introducing different concentrations of CB (from 0wt.% up to 1wt.%) and we investigated morphology, optical properties and photomobile behaviour at different wavelengths. Optical analysis by polarized light shows that the films with CB concentrations up to 0.1wt.% are quite homogeneous and still present birefringence properties. Photoresponsivity measurements at wavelengths in the range 457-747nm were studied to investigate how the presence of the CB affects the photomobile response inside and outside the absorption spectral region of azo-polymers. Choosing appropriately the CB concentration, we demonstrated that it is possible to enlarge the usable spectral bandwidth of the samples in visible region towards the visible and near infrared spectral region.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132724038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yousuf Hemani, M. Galimberti, K. Koch, H. Panuganti, Davide Bleiner
The technique of chirped pulse amplification has conveniently enabled the development of Joule-class laser facilities delivering terawatt levels of power with a single shot beam on target. In powerful systems like these, beam metrology for pulse charaterization is crucial for maintaining a high level of confidence in generating high intensity laser shots. Optical diagnostics for monitoring beam features such as spectra, beam profile, energy and also measuring dispersion and the compressed pulse duration are necessary. Spatio-temporal couplings such as angular dispersion caused by the presence of chromatic aberrations can distort the pulse energy and duration on target and affect laser matter interactions. A pulsefront- tilt (PFT) diagnostic utilizing a diffractive optic for determining angular dispersion and misalignment at shorter bandwidths is designed and implemented for our laser facility, along-with a homemade single shot auto-correlator for measuring pulse duration after the grating compressor. For real-time monitoring of the laser facility, a smart dashboard protocol using openBIS ELN (Electronics Lab Notebook) is administered to enable regular and uninterrupted saving of raw data which is integrated into the local dashboard for visualization and data analysis.
{"title":"Real time pulse characterization for a terawatt laser facility","authors":"Yousuf Hemani, M. Galimberti, K. Koch, H. Panuganti, Davide Bleiner","doi":"10.1117/12.2673119","DOIUrl":"https://doi.org/10.1117/12.2673119","url":null,"abstract":"The technique of chirped pulse amplification has conveniently enabled the development of Joule-class laser facilities delivering terawatt levels of power with a single shot beam on target. In powerful systems like these, beam metrology for pulse charaterization is crucial for maintaining a high level of confidence in generating high intensity laser shots. Optical diagnostics for monitoring beam features such as spectra, beam profile, energy and also measuring dispersion and the compressed pulse duration are necessary. Spatio-temporal couplings such as angular dispersion caused by the presence of chromatic aberrations can distort the pulse energy and duration on target and affect laser matter interactions. A pulsefront- tilt (PFT) diagnostic utilizing a diffractive optic for determining angular dispersion and misalignment at shorter bandwidths is designed and implemented for our laser facility, along-with a homemade single shot auto-correlator for measuring pulse duration after the grating compressor. For real-time monitoring of the laser facility, a smart dashboard protocol using openBIS ELN (Electronics Lab Notebook) is administered to enable regular and uninterrupted saving of raw data which is integrated into the local dashboard for visualization and data analysis.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127911315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bragg crystals are widely used in free electron lasers to diffract and isolate an extremely narrow spectral range from the initial self-amplified spontaneous emission (SASE) signal. By rotating the crystal along one of its axes, multiple reflections can be generated as per Bragg’s law. A measurement model based on Bragg’s law was established at the SASE2 beamline of the European XFEL after extensive hours of hard x-ray self-seeding (HXRSS) operation. This model characterizes the crystal’s range of motion and reflections. In this work, two computer vision techniques, the Hough transform and template matching, are implemented to identify the absolute photon energy from photon diagnostic images. By comparing the spectrometer correlation scans with the model, the actual operational energy can be determined from the measured data using these techniques, enabling accurate calibration as well as the ability to freely scan the photon energy with a self-seeded beam over a wide energy range.
{"title":"Computer vision approaches for the absolute energy calibration of Bragg crystal setups","authors":"Christian Grech, G. Geloni, M. Guetg","doi":"10.1117/12.2665790","DOIUrl":"https://doi.org/10.1117/12.2665790","url":null,"abstract":"Bragg crystals are widely used in free electron lasers to diffract and isolate an extremely narrow spectral range from the initial self-amplified spontaneous emission (SASE) signal. By rotating the crystal along one of its axes, multiple reflections can be generated as per Bragg’s law. A measurement model based on Bragg’s law was established at the SASE2 beamline of the European XFEL after extensive hours of hard x-ray self-seeding (HXRSS) operation. This model characterizes the crystal’s range of motion and reflections. In this work, two computer vision techniques, the Hough transform and template matching, are implemented to identify the absolute photon energy from photon diagnostic images. By comparing the spectrometer correlation scans with the model, the actual operational energy can be determined from the measured data using these techniques, enabling accurate calibration as well as the ability to freely scan the photon energy with a self-seeded beam over a wide energy range.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115362845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. V. Bui, Masahiko Kanaoka, M. Yabashi, Tetsuya Ishikawa, Y. Sano, K. Yamauchi
An atomically precise, super smooth, and damage-free surface is highly demanded for x-ray mirrors, multilayer optics, channel-cut crystal monochromators (CCM), and gratings. An ultra-precision optic with a figure error of several nm is crucial for single-nanometer spatial resolution, signal strength, and contrast. Moreover, sub-angstrom root-mean-square surface roughness is beneficial for high reflectivity and the lowest unwanted scattering. Additionally, a damage-free surface with no alter layer is greatly desired for CCM and grating substrates because it is essential for the high reflectivity of the CCM and the uniform etching rate of the grating’s ruling. In the manufacturing of x-ray mirrors, to obtain the desired figure error, a non-contact figuring method, such as ion beam figuring (IBF), plasma chemical vaporization machining (PCVM), or Elastic Emission Machining (EEM), is usually employed thanks to its high controllability and stability. EEM has proved the best performance in terms of achieving a low figure error and maintaining a good surface roughness. After shaping/figuring, a finishing method is usually applied to improve its surface roughness without distorting its figure error. Recently, Catalyst-Referred Etching (CARE) has realized its potential and applicability to x-ray mirror manufacturing as a finishing method. Thanks to its removal mechanism, a highly ordered surface with a root-mean-square of 0.03 nm RMS is attained. In the polishing of a CCM, because a mechanical method is usually used to polish its surface at the narrow gap, the residual mechanical damage induced a low reflectivity and low spatial resolution. PCVM with a wire electrode has recently been proposed and demonstrated its excellent performance. The damage-free surface of a CCM with a gap of less than 100µm has been successfully realized by PCVM. In this paper, recent achievements in figuring (EEM), surface finishing (CARE), and damage removal (PCVM) are presented and discussed.
{"title":"Fabrication of atomically precise, super smooth, and damage-free x-ray optics","authors":"P. V. Bui, Masahiko Kanaoka, M. Yabashi, Tetsuya Ishikawa, Y. Sano, K. Yamauchi","doi":"10.1117/12.2668438","DOIUrl":"https://doi.org/10.1117/12.2668438","url":null,"abstract":"An atomically precise, super smooth, and damage-free surface is highly demanded for x-ray mirrors, multilayer optics, channel-cut crystal monochromators (CCM), and gratings. An ultra-precision optic with a figure error of several nm is crucial for single-nanometer spatial resolution, signal strength, and contrast. Moreover, sub-angstrom root-mean-square surface roughness is beneficial for high reflectivity and the lowest unwanted scattering. Additionally, a damage-free surface with no alter layer is greatly desired for CCM and grating substrates because it is essential for the high reflectivity of the CCM and the uniform etching rate of the grating’s ruling. In the manufacturing of x-ray mirrors, to obtain the desired figure error, a non-contact figuring method, such as ion beam figuring (IBF), plasma chemical vaporization machining (PCVM), or Elastic Emission Machining (EEM), is usually employed thanks to its high controllability and stability. EEM has proved the best performance in terms of achieving a low figure error and maintaining a good surface roughness. After shaping/figuring, a finishing method is usually applied to improve its surface roughness without distorting its figure error. Recently, Catalyst-Referred Etching (CARE) has realized its potential and applicability to x-ray mirror manufacturing as a finishing method. Thanks to its removal mechanism, a highly ordered surface with a root-mean-square of 0.03 nm RMS is attained. In the polishing of a CCM, because a mechanical method is usually used to polish its surface at the narrow gap, the residual mechanical damage induced a low reflectivity and low spatial resolution. PCVM with a wire electrode has recently been proposed and demonstrated its excellent performance. The damage-free surface of a CCM with a gap of less than 100µm has been successfully realized by PCVM. In this paper, recent achievements in figuring (EEM), surface finishing (CARE), and damage removal (PCVM) are presented and discussed.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"12581 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130340170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dylan Heberle, Noah Flemens, Connor Davis, J. Moses
Dispersion management is among the most challenging aspects of the design and realization of amplified laser systems possessing octave-spanning bandwidth and good compressed pulse quality. Here we demonstrate a new type of device for octave-spanning dispersion management. We combine the paradigm of chirped quasi-phase matching (QPM) for pulse shaping during frequency conversion with the robust, efficient, octave-spanning capability of an adiabatic frequency downconversion device. The result is a simple, monolithic device that can produce an octave-spanning infrared pulse with tailored dispersion – a technique that may be especially convenient for high-energy amplifier chains employing difference frequency generation and/or parametric amplification stages. The technique can also serve as a way to produce pulses of ~10 fs duration throughout the visible to mid-infrared spectrum for hyperspectral ultrafast spectroscopy. Adiabatic frequency conversion employs a slowly changing position-dependent poling frequency in a chirped QPM device to efficiently frequency shift photons over a wide bandwidth with a linear transfer function. In this work, we show that the frequency dependent localized conversion of the process allows tailoring of the total group-delay dispersion (GDD). We have demonstrated a first device with zero GDD, allowing efficient conversion of a few-cycle near-infrared input to a near-single-cycle mid-infrared output of the same duration (~12 fs, with bandwidth spanning 2.0-4.0 microns). We present additional designs for precise custom tailoring of the frequency-dependent group delay.
{"title":"Adiabatic frequency converter as a custom octave-spanning dispersive element","authors":"Dylan Heberle, Noah Flemens, Connor Davis, J. Moses","doi":"10.1117/12.2671413","DOIUrl":"https://doi.org/10.1117/12.2671413","url":null,"abstract":"Dispersion management is among the most challenging aspects of the design and realization of amplified laser systems possessing octave-spanning bandwidth and good compressed pulse quality. Here we demonstrate a new type of device for octave-spanning dispersion management. We combine the paradigm of chirped quasi-phase matching (QPM) for pulse shaping during frequency conversion with the robust, efficient, octave-spanning capability of an adiabatic frequency downconversion device. The result is a simple, monolithic device that can produce an octave-spanning infrared pulse with tailored dispersion – a technique that may be especially convenient for high-energy amplifier chains employing difference frequency generation and/or parametric amplification stages. The technique can also serve as a way to produce pulses of ~10 fs duration throughout the visible to mid-infrared spectrum for hyperspectral ultrafast spectroscopy. Adiabatic frequency conversion employs a slowly changing position-dependent poling frequency in a chirped QPM device to efficiently frequency shift photons over a wide bandwidth with a linear transfer function. In this work, we show that the frequency dependent localized conversion of the process allows tailoring of the total group-delay dispersion (GDD). We have demonstrated a first device with zero GDD, allowing efficient conversion of a few-cycle near-infrared input to a near-single-cycle mid-infrared output of the same duration (~12 fs, with bandwidth spanning 2.0-4.0 microns). We present additional designs for precise custom tailoring of the frequency-dependent group delay.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128390740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. Razzoli, H. Ueda, E. Paris, B. Liu, E. Skoropata, L. Patthey
Time-resolved spectroscopies have provided insights in the quest for understanding the fundamental properties of quantum materials and towards controlling their functional properties through light-matter interaction. In this regard, Free Electrons Lasers (FELs) have developed as a powerful tool to perform ultrafast x-ray spectroscopy to obtain energy and momentum-resolved information. In this contribution, we introduce the SwissFEL soft-x-ray condensed matter experimental endstation, named Furka, which is dedicated to Time-Resolved X-ray Absorption (TR-XAS), resonant X-Ray Diffraction (TR-RXRD) and Resonant Inelastic x-ray Scattering (TR-RIXS) experiments to study quantum materials. The current status of the endstation and the first results from the commissioning phase will also be discussed.
{"title":"Ultrafast dynamics in quantum matter at SwissFEL: capabilities of Furka endstation","authors":"E. Razzoli, H. Ueda, E. Paris, B. Liu, E. Skoropata, L. Patthey","doi":"10.1117/12.2668886","DOIUrl":"https://doi.org/10.1117/12.2668886","url":null,"abstract":"Time-resolved spectroscopies have provided insights in the quest for understanding the fundamental properties of quantum materials and towards controlling their functional properties through light-matter interaction. In this regard, Free Electrons Lasers (FELs) have developed as a powerful tool to perform ultrafast x-ray spectroscopy to obtain energy and momentum-resolved information. In this contribution, we introduce the SwissFEL soft-x-ray condensed matter experimental endstation, named Furka, which is dedicated to Time-Resolved X-ray Absorption (TR-XAS), resonant X-Ray Diffraction (TR-RXRD) and Resonant Inelastic x-ray Scattering (TR-RIXS) experiments to study quantum materials. The current status of the endstation and the first results from the commissioning phase will also be discussed.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131014988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nina Gamaiunova, M. Tryus, F. Grepl, A. Velyhan, S. Stanček, V. Kantarelou, G. Cirrone, D. Margarone, L. Giuffrida, T. Chagovets
We have developed a compact liquid target setup that produces a continuous ø50 µm cylindrical water jet, capable of operating at high vacuum. It has been tested with a commercial ultrashort-pulse laser in a series of proof-of-principle laser-driven ion acceleration and x-ray generation experiments at repetition rates up to 1 kHz. In optimized conditions, measurements by the time-of-flight (TOF) method have demonstrated a proton signal cut-off energy of 179±9 keV. The laser-generated x-ray emission was characterized in the range 2-36 keV and used as excitation for x-ray fluorescence spectroscopy (XRF) measurements.
{"title":"Liquid jet target system for laser-plasma interactions at kHz repetition rate","authors":"Nina Gamaiunova, M. Tryus, F. Grepl, A. Velyhan, S. Stanček, V. Kantarelou, G. Cirrone, D. Margarone, L. Giuffrida, T. Chagovets","doi":"10.1117/12.2665607","DOIUrl":"https://doi.org/10.1117/12.2665607","url":null,"abstract":"We have developed a compact liquid target setup that produces a continuous ø50 µm cylindrical water jet, capable of operating at high vacuum. It has been tested with a commercial ultrashort-pulse laser in a series of proof-of-principle laser-driven ion acceleration and x-ray generation experiments at repetition rates up to 1 kHz. In optimized conditions, measurements by the time-of-flight (TOF) method have demonstrated a proton signal cut-off energy of 179±9 keV. The laser-generated x-ray emission was characterized in the range 2-36 keV and used as excitation for x-ray fluorescence spectroscopy (XRF) measurements.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"290 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120838437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
SwissFEL at the Paul Scherrer Institute is a free-electron laser facility providing hard and soft x-rays, based on the SASE principle. In addition, the soft x-ray beamline Athos is currently extended for electron beam manipulation with external lasers, aiming to provide seeding capabilities based on the two-stage echo-enabled harmonic generation (EEHG) scheme. Completion of the installation is foreseen in spring 2023. We present the initial results on the single-stage operation for ESASE and mode-locked lasing and give an outlook on the expected performance for seeding down to 1 nm.
{"title":"Seeding at SwissFEL","authors":"S. Reiche","doi":"10.1117/12.2666463","DOIUrl":"https://doi.org/10.1117/12.2666463","url":null,"abstract":"SwissFEL at the Paul Scherrer Institute is a free-electron laser facility providing hard and soft x-rays, based on the SASE principle. In addition, the soft x-ray beamline Athos is currently extended for electron beam manipulation with external lasers, aiming to provide seeding capabilities based on the two-stage echo-enabled harmonic generation (EEHG) scheme. Completion of the installation is foreseen in spring 2023. We present the initial results on the single-stage operation for ESASE and mode-locked lasing and give an outlook on the expected performance for seeding down to 1 nm.","PeriodicalId":376481,"journal":{"name":"Optics + Optoelectronics","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129132639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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