bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fano’s propensity rule in angle-resolved attosecond interferometry
Authors: Busto D , Vinblad J , Zhong S , Isinger M , Nandi S , Gisselbrecht M , L’Huillier A , Lindroth E , Dahlström J M 
Published: June 2020

Synopsis
Above-threshold ionization is a corner stone of attsecond science. In this work we extend Fano’s propensity rule to two-photon above-threshold ionization and show that the asymmetry between absorption and emission of the second photon predicted by this propensity rule has strong implications for angle-resolved pump-probe experiments and in particular for attosecond photoelectron interferometry.
Spiral-like Structure: Unwinding Holographic Interference
Authors: Maxwell A S , Lai X Y , Sun R P , Figueira de Morisson Faria C , Liu X J 
Published: June 2020

Synopsis
A new spiral shaped holographic interference structure in above-threshold ionisation photoelectron momentum distributions is presented in experimental and theoretical results. Given a large Coulomb interaction and bound-state symmetries encoded in interfering trajectories we demonstrate its use for imaging.
Attosecond time delay in multiphoton ionization
Authors: Yang W , Liu X , Song X , Li P , Chen J 
Published: June 2020

Synopsis
Here with a semiclassical picture we show that, after emerging in the continuum state, the photoelectron can be temporarily re-trapped by the atomic potential in a quasi-bound state, stays there for hundreds of at-toseconds before it gets free again, which is the origin of the remarkable time delay in above threshold ionization experiment. Our results build a bridge between the seemingly unrelated quantum EWS and classical Coulomb-induced time delays, and hold promise for intuitive interpreting fundamental electronic processes in photophysical and photochemical experiments.
NewStock, a time-dependent close-coupling program for atomic ionization
Authors: Argenti L , Lindroth E 
Published: June 2020

Synopsis
We present NewStock, a time-dependent program to compute the photoionization of polyelectronic atoms by arbitrary light pulses. The program, which expands the capabilities of the Stock B-spline close-coupling structure code to the time-dependent domain, is applied to the pump-probe ionization of the neon atom.
Attosecond delays in photoionization of diatomic and polyatomic molecules
Authors: Loriot V , Marciniak A , Nandi S , Hervé M , Karras G. , Constant E , Lépine F 
Published: June 2020

Synopsis
We have investigated the photoionization dynamics of several molecular systems using attosecond in-terferometric techniques based on ultrashort extreme ultraviolet (XUV) pulses. For diatomic molecules such as N2, we can get a detailed picture of the photoionization process by measuring the attosecond delays. For polyatomic molecules such as naphthalene, such measurements can provide the average timescale over which photoionization processes at different electron energies can occur in complex quantum systems.
Ultrafast time-resolved photoelectron and ion fragment momentum imaging of vacuum ultraviolet-excited molecules
Authors: Slaughter D S , Larsen K A , Sturm F P , Belkacem A , Ranitovic P , Weber Th 
Published: June 2020

Synopsis
New experimental results are presented on the dissociation dynamics of small neutral molecules in time-resolved photoexcitation-photoionization experiments by ultrashort vacuum- and extreme-ultraviolet laser pulses and charged particle momentum imaging.
Multi-channel contributions to infrared-driven high-harmonic generation in solids
Authors: Navarrete F , Ciappina M F , Thumm U. 
Published: June 2020

Synopsis
We numerical and analytically investigate the electron dynamics of high-order harmonic generation (HHG) in solids driven by strong mid-infrared few-cycle laser pulses. Our numerical model distinguishes contributions to the HH yield from (i) intra- and interband transitions and (ii) the central Γ–point of the first Brillouin zone (BZ) versus the entire first BZ of the initial valence band.
Generation of high harmonics in solids
Authors: Floss I , Lemell C , Yabana K , Burgdörfer J 
Published: June 2020

Synopsis
We have developed an ab-initio multi-scale simulation to model light synthesis and propagation through transparent media accounting for the non-linear response of the solid. Using this approach we are able to investigate the build-up of high harmonics induced by strong and short laser pulses along the propagation direction inside a large band-gap dielectric, diamond. Detailed analysis of the results allows to identify minimum requirements necessary to realistically model laser-solid interactions.
Disentangling relativistic non-dipole effects in strong field atomic ionisation in non-relativistic regime
Authors: Haram N , Ivanov I , Xu H , Kim K T , Atia-tul-Noor A , Sainadh U S , Litvinyuk I , Sang R T 
Published: June 2020

Synopsis
Quantum mechanical description of the relativistic non-dipole effects is of fundamental interest in strong-field physics community, as they may have direct implications on the processes relying on re-collision dynamics. Here, we present a detailed experimental and theoretical study on the relativistic non-dipole effects in strong-field ionisation at moderate intensities. We compare our precise measurements with a truly ab-initio fully relativistic 3D model based on the time-dependent Dirac equation and demonstrate an excellent agreement between experimental results and theoretical predictions.
Effects of relativistic interactions in photodetachment time delay of Br−
Authors: Saha S , Jose J , Deshmukh P C , Kheifets A S , Dolmatov V K , Manson S T 
Published: June 2020

Synopsis
Wigner time delay in photodetachment of Br− has been studied. The absence of Coulomb phase in photodetachment process makes the Wigner time delay more sensitive to the centrifugal barrier shape resonance and threshold effects. Important relativistic effects have been found near the threshold region.
Dynamic interference in photoemission by chirped ultrashort extreme ultraviolett pulses
Authors: Wang N , Li G , Liu A , Thumm U 
Published: June 2020

Synopsis
We investigated dynamical interference (DI) in the photoionization of hydrogen atoms in intense ultrashort chirped extreme ultraviolett (XUV) pulses by numerically solving the time-dependent Schrödinger equation(TDSE) and examined its dependence on pulse intensity, duration, and chirp. We find the pulse chirp to red shift the photoelectron spectrum and weaken the DI effect.
Application of synthesized tetragonal structured zirconium oxide nanoparticle on victoria blue B and acridine orange dye
Authors: Santhosh A M , Yogendra K , Mahadevan K M , Madhusudhana N 
Published: June 2020

Abstract
Zirconium oxide with the tetragonal phase was prepared from zirconium nitrate and urea by solution combustion method. Nano-photocatalyst zirconium oxide was investigated by XRD, SEM-EDAX, TEM, UV absorbance spectroscopy and specific surface area analysis. The distribution size of ZrO was found to be less than 17nm and was confirmed by XRD and TEM studies. Further the ZrO nano-photocatalyst confirms the tetragonal phase by XRD. EDAX reveals the formation of ZrO. The efficiency of ZrO nanoparticles in the photodegradation of victoria blue B and acridine orange dye under sunlight was investigated. The results reveal that the degradation efficiency was found to be 95.42% for VBB (at 0.030g/pH 6/1×10−4mol/dm3) and 92.52% for AO (at 0.035g/pH 4/1×10−4mol/dm3). Further the degradation efficiency shown highest in VBB dye when compare to AO dye. Therefore, the ZrO nanoparticle has been found to be suitable for the treatment of textile effluents.
A study of dielectric relaxation properties of ZnFe2-xBixO4 nano Ferrites synthesized by sol-gel combustion method
Authors: Kumar N Suresh 
Published: June 2020

Abstract
A series of bismuth doped zinc nano ferrite particles with the r formula ZnBixFe2-xO4 (x = 0.00, 0.05, 0.10, 0.15, 0.20 & 0.25) were prepared by sol-gel combustion method; and these compositions were sintered at 600°C for 5 hrs. With the effect of bismuth doping, the structural properties of all prepared samples were characterized by X-ray diffraction (XRD). The X-ray diffraction spectra analyses confirm single phase cubic (FCC) spinal structure. The average crystallite size (D) of the samples found to be in the range 17-20 nm. The dielectric properties viz., dielectric constant (ε′), dielectric loss tangent (tan δ) and AC conductivity σAC) were measured at room temperature in the range 20Hz to 2MHz, which confirm the normal ferrite behavior. In the present research work, we are intended to extend dielectric relaxation studies of these samples with the help of Cole-Cole plots. The Cole-Cole plots of the bismuth doped zinc ferrites were drawn as a function of ε′ and ε″ (where, ε″=ε′ tan δ) and hence we have determined the spreading factor (β) for all the samples. It was observed that β decreases with the increase of the concentration of B2O3. It is noticed that the dielectric parameters ε′, tan δ and σAC have exhibited the similar trend. These samples may find suitable applications in electrolytic elements in battery technology.
Computational studies of Distinct Anilines for Electrooptical properties
Authors: Prasanti Marla , Jha Anjali , Kumar Ch Ravi Shankar 
Published: June 2020

AbstractSignificant studies of anilines reported biological activities like oxidation, polymerization, arylation, alkylation, protonation, conformation for photophysical and electrochemical properties using experimental and computational studies like CNDO, MINDO, PCILO that arise due to charge transfer interaction. These interactions still provide enough scope with analysis using electron density method to determine physical, chemical and electrooptical properties. The present work attributes family of anilines-aniline(AN),p-chloroaniline(CAN) andp-nitroaniline(NAN) with experimental studies like FTIR and FT Raman and Computational studies with Gauss View4.1 package using B3LYP–basis set 6-311++(d, p) for electrooptical properties. Interpretation of experimental spectra of FTIR and FT Raman confirm the wave numbers are in specified range corresponding to functional group and fingerprint regions. It is observed that intensity of the wave numbers in Raman spectra are reduced in comparison with infrared spectra. Molecular structures are visualized with molecular editor Avogadro for molecular properties. Computational studies are performed for optimized structures wherein the computed infrared spectra and Raman spectra are in agreement with experimental spectra. Studies of charge transfer interactions determine properties like dipole moment, EHomo, ELumo, energy gap, electrophilicity index, polarization and first order hyperpolarizability. A feature of work is NAN possess greater tendency in charge transfer interaction with reduced energy gap, high polarizability and first order Hyperpolarizability that enable to form complex for optical materials and devices.
Recent Developments and Future Advancements in Solar Panels Technology
Authors: Durganjali C Santhi , Bethanabhotla Sameer , Kasina Satwik , Radhika Dr Sudha 
Published: June 2020

Abstract
Although advancements and developments are happening on the electronics part of the solar cell, a steep boost in the research field of material and manufacturing perspective must highlight. Artificial intelligence-based maximum power point tracking algorithms are the future of solar-based circuits. Fabrication of transparent solar cells that have the potential to be used for a vast number of applications, solar cells with more than one layer of light capturing materials. Innovative photovoltaic modules that can lay on roads that can power LED lamps and can melt snow in winter are a few cutting-edge technologies from the materials as well as a manufacturing point of view. Surprisingly they have higher efficiency than traditional solar cells. This paper analyses the recent developments and the future potential of solar panel technologies in the material and manufacturing perspective.
Sol-gel synthesis and electrochemical properties of wolframite FeNbO4
Authors: Saritha D. 
Published: June 2020

Abstract
In the current effort, illustrate a different case FeNbO4 with wolframite structure. FeNbO4 was prepared by sol-gel polymeric precursor method in prospect of estimated prominent specific capacity. One cause is owing to the reduction of both Fe and Nb. The electrochemical lithium insertion/extraction studies on wolframite FeNbO4 were conducted with a rate of C/10 in the potential window of 1.0-3.8V. Ex-situ XRD procedure was used to identify the Structural changes all the way through insertion/extraction of Lithium. The details of synthesis and lithium insertion mechanism in FeNbO4 will be discussed.
X-ray Mass attenuation coefficients of Nb2O5over the energy range 18.9132-19.6882
Authors: Manjula G , Jyothsna S , Kumar A Mahesh , Roy Bunty Rani , Yadav Ashok Kumar , Rao A S Nageswara 
Published: June 2020

AbstractWe use the Extended X-ray absorption fine structure (EXAFS) to measure the mass attenuation coefficient of Nb2O5Niobium compound in the X-ray energy range 18.9132 - 19.6882 keV. The results represent the most extensive experimental data set for Nb2O5and include absolute mass attenuation coefficients in the region of extended x-ray absorption fine structure. Comparison of the results with tabulations of calculated photo electric absorption coefficients indicate the differences between the calculated and observed values with the theoretical predictions.
Temperature dependence of density and thermal expansion of oxides of praseodymium and dysprosium in the temperature range 300 to 1000 K
Authors: RangaRao M. , GopiKrishna N. , Chandra lingam S 
Published: June 2020

Abstract
In this communication the variation of density and thermal expansion of oxides of praseodymium and dysprosium with temperature is studied and reported. The gamma ray attenuation technique is employed to carry out the study with a gamma ray densitometer fitted with high temperature furnace designed in our laboratory. The temperature dependent quantities such as linear gamma ray attenuation (μ
1), density (ρ) and the coefficient of linear thermal expansion (α)of Pr6O11 and Dy2O3 have been fit to a second degree polynomial equation.
Pressure induced semimetallic B2 phase of alkaline earth tellurides
Authors: Kunduru Lavanya , Sripada Suresh , Roshan S. C. Rakesh , Yedukondalu N. , Sainath M. 
Published: June 2020

Abstract
We report pressure induced structural, topological quantum phase transitions and Fermi surface topology in MTe (M = Ca, Sr, Ba) compounds under high pressure using first principles calculations based on density functional theory. MTe compounds undergo a first order structural phase transition from NaCl-type (B1) to CsCl-type (B2) phase at 24.2, 14.7, 4.9 GPa respectively and are consistent with the experimental observations. Electronic structure of MTe compounds were calculated using new parameterization of Tran Blaha-modified Becke Johnson (TB-mBJ) potential and the obtained band gaps are improved over LDA/GGA functionals. The three compounds under investigation are indirect band gap semiconductors at ambient conditions. Under high pressure, B2 phase of (Ca/Sr)Te and BaTe are found to be node-line and Dirac semimetals, respectively without inclusion of spin-orbit coupling.
The MPGD-Based Photon Detectors for the upgrade of COMPASS RICH-1
Authors: Agarwala J. , Dalla Torre S. , Dasgupta S. , Gregori M. , Hamar G. , Levorato S. , Menon G. , Tessarotto F. , Triloki  , Zhao Y.X. , Bradamante F. , Bressan A. , Chatterjee C. , Ciliberti P. , Martin A. , Alexeev M. , Denisov O. , Chiosso M. , Panzieri D. , Azevedo C.D.R. , Veloso J.F.C.A. , Büchele M. , Fischer H. , Herrmann F. , Schopferer S. , Cicuttin A. , Crespo M.L. , Finger M. , Finger M. , Slunecka M. , Sulc M. 
Published: June 2020

Abstract
After pioneering gaseous detectors of single photon for RICH applications using CsI solid state photocathodes in MWPCs within the RD26 collaboration and by the constructions for the RICH detector of the COMPASS experiment at CERN SPS, in 2016 we have upgraded COMPASS RICH by novel gaseous photon detectors based on MPGD technology. Four novel photon detectors, covering a total active area of 1.5 m2, have been installed in order to cope with the challenging effciency and stability requirements of the COMPASS physics programme. They are the first application in an experiment of MPGD-based single photon detectors. All aspects of the upgrade are presented, including engineering, mass production, quality assessment and performance.
Perspectives for further developments in the field of gaseous single photon detectors are also indicated.
A modular mini-pad photon detector prototype for RICH application at the Electron Ion Collider
Authors: Agarwala J. , Azevedo C.D.R. , Chatterjee C. , Cicuttin A. , Ciliberti P. , Crespo M.L. , Dalla Torre S. , Dasgupta S. , Gregori M. , Levorato S. , Menon G. , Tessarotto F. , Zhao Y.X. 
Published: June 2020

Abstract
Experiments at the future Electron Ion Collider require excellent hadron identification in a broad momentum range, in harsh conditions. A RICH capable to fulfill the PID requirements of the EIC could use MPGD-based photon detectors with solid photocathodes for covering large surfaces at affordable cost, providing good effciency, high resolution and compatibility with magnetic field. Photon detectors realized by coupling THGEMs and Micromegas have been successfully operated at the RICH-1 detector of the COMPASS Experiment at CERN since 2016. A similar technology could be envisaged for an EIC RICH, provided a large improvement in the photon position resolution is achieved. An R&D effort in this direction is ongoing at INFN Trieste. Few prototypes with smaller pixel size (down to 3 mm x 3 mm) have been built and tested in the laboratory with X-Ray and UV LED light sources. A modular mini-pad detector prototype has also been tested at the CERN SPS H4 beamline. New data acquisition and analysis software called Raven DAQ and Raven Decoder have been developed and used with the APV-25 based Scalable Readout System (SRS), for the modular mini-pad prototype tests.
The main characteristics of the new mini-pad hybrid MPGD-based detector of single photons are described and preliminary results of laboratory and beam tests are presented.
Study of LTCC-GEM gain properties
Authors: Kato Yukihiro 
Published: June 2020

Abstract
Low Temperature Co-fired Ceramic (LTCC) is an insulator and has been used for electronic circuit boards. The features of LTCC are good electric discharge resistance and high rigidity. A GEM foil using LTCC is expected not to be broken by an electric discharge. The manufactured LTCC-GEM has a hole area of 100 × 100 mm2, the hole diameter is 100 µm, and the hole pitch is 200 µm. We have measured the performance with respect to the gain properties of 200 µm thick LTCC-GEM with 55Fe X-ray. In the measurement, the gain achieved was about 2000 for three gases, ArCO2 (Ar:CO2 = 70:30), P10 (Ar:CH4 = 90:10) and T2K (Ar:CF4:iC4H10 = 95:3:2), and the long-term (100 hours) fluctuation was within 6%. And when the 100 × 100 mm2 LTCC-GEM hole area was divided into 10× 10 mm2, the gain uniformity of the entire region was estimated to be 12%.
A new amplification structure for time projection chambers based on electroluminescence
Authors: González-Díaz D. , Fontaíña M. , García Castro D. , Mehl B. , De Oliveira R. , Williams S. , Monrabal F. , Querol M. , Álvarez V. 
Published: June 2020

Abstract
A simple hole-type secondary scintillation structure (2 mm-hole, 5 mm-pitch, 5 mm-thickness) is introduced and its operation demonstrated in pure xenon in the pressure range 2-10 bar. The new device, characteristically translucent, has been manufactured through a collaboration between IGFAE and the CERN workshop, and relies entirely on radiopure materials (acrylic and copper), being extremely rugged in the presence of sparks, mechanically robust, and easily scalable, yet made through a relatively simple process. With an overall figure (at 10 bar) characterized by an energy resolution of 18.9%(FWHM) for 55Fe x-rays, an optical gain of m
γ
= 500 ph/e, and a stable operation at reduced fields more than twice those of some of the presently running experiments (E

EL
= 3 kV/cm/bar), this family of structures seems to show great promise for electroluminescence readouts on large scale detectors. As argued below, further improvements have the potential of bringing the energy resolution close to the Fano factor and increasing the optical gain.
Study of a Passive Gating Grid for Ion Back Flow Suppression
Authors: Zakharov V , Garg P , Hemmick T , Dehmelt K 
Published: June 2020

Abstract
Space Charge (SC) distortions are some of the main issues for high-resolution Time Projection Chambers (TPC). The two main SC sources are those from primary ionizations and those that result from amplification stages. The gain stages are required to increase the electron (e
-) signal above electronics noise levels, but this inevitably creates extra ions. These ions can enter the drift region and distort the electric field, and thus lower the detector performance. We will present a brief motivation for our Ion Back Flow (IBF) studies along with explanations of existing techniques and our simulation results to reduce IBF. We propose several mesh structures along with static bi-polar gating. Further, we discuss position distortions in e
- trajectories due to a static bi-polar grid and use these distortions to compensate for non-linear responses of our Zig-Zag pad readout.
Characterisation of the charging up effect in resistive Micromegas detectors
Authors: Samarati J , Iengo P , Longo L , Sekhniaidze G , Sidiropoulou O , Wotschack J 
Published: June 2020

Abstract
During the last decade, a major improvement in the field of the Micro-Pattern Gaseous Detectors has been reached by adding a layer of resistive strips above the readout strips to reduce drastically the effect of discharges. The resistive strips are separated from the readout strips by a thin layer of insulator. When the detector is operated some gain reduction is observed over the first seconds or minutes after switch-on, stabilising after some time. Is this related to the presence of the insulator or are there other mechanisms at work? We report here the results of a detailed study of this effect and compare resistive-strip and Diamond Like Carbon (DLC) Micromegas detectors. We will present and quantify the main characteristics of this effect, i.e, the relative gain drop and the time to reach a stable regime, as a function of the detector configuration and rate. In addition we studied the influence of the pillars that support the mesh on the behaviour of bulk and non-bulk Micromegas detectors.
Study of discharge properties in cascaded gaseous detectors
Authors: Maltsev T. , Sauli F. , Shekhtman L. 
Published: June 2020

Abstract
In this work we describe simulation and experimental studies of the possible reasons for the observed increase of the maximum gain in multi-GEM devices. Two main hypotheses are analyzed: first, a diffusion-dominated charge spread reducing the density in individual holes, acting as independent amplifiers and therefore an increase of the discharge limit with the number of cascaded electrodes; second, the possibility that total avalanche charge before transition to a discharge (Raether limit) strongly depends on the field value and is therefore much higher in cascaded than in single-stage systems.