PTB-OAR2026 · dataset
Three-component normalized mean velocity and turbulence intensity pipe flow profilesStreamwise, wall-normal and spanwise velocity statistics of turbulent pipe flow measured in a DN 100 pipe using a laser Doppler velocimeter (LDV) at the Gravimetric Thermal Energy Standard (GraTESt) in the Physikalisch-Technische Bundesanstalt, Berlin. To normalize the velocity measurement data obtained by LDV, the friction velocity was determined through measurement of the pressure drop along the
PTB-OAR2026 · Archive
Sr90-4P and Pm147-50µmZip file containing two BSS 2 radiation fields: Sr-90/Y-90 sources with a 4 mmm PMMA absorber and Pm-147 sources with improved beam-flattening filter of 50 µm thickness. [ZIP file containing 4 files]
PTB-OAR2026 · Archive
Design of customisable audible brainstem response data for training and testing of audiological AI-softwareThis document comprises a compendium of the design of electroencephalography data for an application to train and test deep-learning networks to be applied on auditory brainstem responses. Despite their essentially artificial nature, the data are derived from experimental sources and are representative of the characteristic behaviour of audiological practice. It is possible to customise them to me
PTB-OAR2026 · dataset
Additional data for the deliverable "D6: Inter-laboratory comparison report, describing sample preparation requirements, sample introduction methods, and uncertainty budgets"This dataset describes the results of two interlaboratory comparisons using two reference materials (RM), a spiked natural seawater and a spiked synthetic sand. The measurands selected were the mass fraction of 238U, 239Pu, 241Am and 237Np, and the 234/238U, 235/238U, 236/238U and 239/240Pu isotope ratios. The liquid comparison involved 11 participants, who produced a total of 83 results. The soli
PTB-OAR2026 · Archive
Additional data for the deliverable "D1: Inter-laboratory comparison report for low-level radionuclide detection by mass spectrometry"This dataset describes the results of an interlaboratory comparison exercise, focusing on comparing the capabilities of different mass spectrometers for low-level radioactivity measurement. Participating labs around Europe were asked to determine activity levels for a range of actinides (²³⁴U, ²³⁶U, ²³⁷Np, ²³⁹Pu, ²⁴⁰Pu, ²⁴¹Am, NatU and ²³⁹/²⁴⁰Pu) and ⁹⁰Sr. Standards were prepared from starting mat
PTB-OAR2025 · Archive
Measurement data for the hyperfine splitting and the lifetime of the ²F_⁷⁄₂ clock state in ¹⁷³Yb⁺This file includes the measurement data that supports our finding for the paper “Nuclear spin quenching of the ²𝑆1/2→²𝐹7/2 electric octupole transition in ¹⁷³Yb⁺”, DOI https://doi.org/10.1103/fx1b-5666. The finding includes the measured frequencies and hyperfine splittings of the ²𝑆1/2→²𝐹7/2 electric octupole transition in ¹⁷³Yb⁺. In addition, the Rabi frequencies of several clock transitions are
PTB-OAR2025 · Crystal structure · unknown
Additional data for the publication: Domain formation and structural stabilities in mixed-species Coulomb crystals induced by sympathetically cooled highly charged ionsWe investigated the structural stability and the formation of vibrational domains in mixed-species ion Coulomb crystals with highly charged ions using molecular dynamics simulations. The data presented here is the result of the evaluated ion trajectories generated using our in-group simulation code. The data for each figure was compiled in separate CSV files, making it possible to reconstruct each
PTB-OAR2025 · Archive · unknown
Additional data for the publication "Transportable strontium lattice clock with 4 x 10^-19 blackbody radiation shift uncertainty"We describe a transportable optical lattice clock based on the 1S0 -> 3P0 transition of lattice-trapped 87Sr atoms with a total systematic uncertainty of 2.1 x 10^-18. The blackbody radiation shift, which is the leading systematic effect in many strontium lattice clocks, is controlled at the level of 4.0 x 10^-19, as the atoms are interrogated inside a well-characterised, cold thermal shield. Usin
PTB-OAR2025 · Archive
Flow Cytometry Pulse Shape Data and their derived quantitiesThese files contain the measured pulse data used in the paper. Originally the data was saved in tdms and fcs files, but was converted to hdf5 and csv files for better accessibility. Channel names are forward scattering (fsc) and side scattering (ssc). The h5 file was then postprocessed and the resulting quantities saved in a csv file.
PTB-OAR2025 · Crystal structure
Ex-Situ and Operando NEXAFS Spectra of Organo-Sulfur CompoundsThis dataset includes operando Near-Edge X-ray Absorption Fine Structure (NEXAFS) spectra of lithium organo-sulfur battery half-cells during Cyclic Voltammetry (CV), as well as ex-situ NEXAFS spectra of organo-sulfur compounds and polymer networks. All NEXAFS spectra were taken in fluorescence mode using energy-dispersive silicon drift detectors (SDD) in the PTB laboratory at BESSY II. The operand
PTB-OAR2025 · Archive
CHF3 infrared absorption cross sections (single components)This dataset contains infrared absorption cross section spectra of fluoroform (CHF3) in synthetic air at the temperatures 296.90(8) and 296.07(8), and various total and partial pressures in the wavenumber range of 600-1940cm-1. Every spectrum was splitted into 6 regions containing an isolated absorption feature, making a total of 12 *.dat files. Every single file contains a different number of spe
PTB-OAR2025 · Archive
CHF3 infrared absorption cross sectionsThis dataset is generated from two composite infrared absorption cross section spectra of fluoroform (CHF3) in synthetic air at the temperatures 296.90(8) and 296.07(8) and the total pressures 674.69(62) and 748.92(70) Torr, respectively, in the range of 600-1940cm-1. Every spectrum was splitted into 6 regions, containing an isolated absorption feature. This makes 12 *.dat files altogether. Single
PTB-OAR2025 · Archive · unknown
Additional data for the publication "Long-distance chronometric leveling with a portable optical clock"We have measured the geopotential difference between two locations separated by 457 km by comparison of two optical lattice clocks via an interferometric fiber link, utilizing the gravitational redshift of the clock transition frequency. The 87Sr clocks have been compared side-by-side before and after one of the clocks was moved to the remote location. The chronometrically measured geopotential d
PTB-OAR2025 · Archive
Measurement Data for "Parallelization of the optical pulse-drive for AC Josephson voltage standards"Characterization measurements of PTB's optical JAWS.
PTB-OAR2024 · Archive
Equivalent Threshold Sound Pressure Levels (ETSPLs) for circumaural Sony WH-1000XM4 headphonesHeadphone sensitivity levels and ETSPL values were determined for Sony WH-1000XM4 headphones and an ear simulator according to IEC 60318-1
PTB-OAR2024 · Archive
Additional data for the publication "Zero External Magnetic Field Quantum Standard of Resistance at the 10^−9 Level"Experimental study on the quantization accuracy of the quantum anomalous Hall effect.
PTB-OAR2024 · Archive
NEXAFS Spectra in Fluorescence and Transmission Mode of Organo-Sulfur Compounds with varying Sulfur Strand LengthThis dataset includes NEXAFS spectra of organo-sulfur compounds with varying sulfur strand length from 1 to 3. The NEXAFS spectra were taken in fluorescence and transmission mode. All of the spectra have been taken at the FCM beamline in the PTB laboratory at BESSY II using Si (111) crystals. All experimental setup details are described in the manuscript "Self-Absorption Correction of NEXAFS Spect
PTB-OAR2024 · Archive
Supplemental material to the article "Sub-nm precise measurement of adhesive gaps by imaging interferometry"This dataset contains experimental data from length measurements of adhesive gaps in substrates with and without adhesives at different pressure, temperature, air moisture and time. The measurements are performed using PTB's Precision Interferometer on a standard material (ULE®) together with a common adhesive (3MTM Scotch-WeldTM DP-460EG), gap thickness approx. 100 µm. Measurements on the sample
PTB-OAR2024 · Archive
20SIP04qMOIF Round Robin Comparison resultsTo provide worked examples of quantitative Magneto-Optical Indicator Film measurements in the frame of the EMPIR project 20SIP04qMOIF, Innovent, PTB and TÜBİTAK performed a Round Robin Comparison by measuring the stray field distributions of magnetic scales using the MOIF systems set up in 15SIB06 NanoMag. TÜBİTAK used its high-resolution confocal microscope. Innovent and PTB used calibrated MagVi
PTB-OAR2024 · Archive
Simulation data for "Compensation of higher order rotationally symmetric Zernike coefficients caused by the defocusing of spherical sections"The provided data enables the immediate replication of the results presented in "Compensation of higher order rotationally symmetric Zernike coefficients caused by the defocusing of spherical sections" at the DGAO 2024. The data is structured with respect to the figures presented in the proceeding.
PTB-OAR2024 · Archive
Development of Flip-Chip Technology for the Optical Drive of Superconducting CircuitsWe discuss the flip-chip mounting process of photodiodes and fiber sleeves on silicon substrates for highly integrated and hybrid quantum circuits for operation at cryogenic temperatures. The size of the gold stud bumps and flip-chip parameters were optimized. Moreover, to connect optical fibers to the photodiodes in an optimal position, the fiber sleeves were aligned with specially fabricated ali
PTB-OAR2024 · Archive
Microbarometer measurements in the vicinity of wind power plants - supplementary fileThis document provides supplementary information describing how to access data of microbarometer measurements in the vicinity of the wind parks in Gagel, Saxony Anhalt, Germany and Burgdorf, lower Saxony, Germany.
PTB-OAR2024 · Archive
Several data sets of seismological and infra-sound field measurements - supplementary fileThis document provides supplementary information describing how to access data of seismological and infrasound field measurements recorded in the course of the Infra-AUV project.
PTB-OAR2024 · Archive
Data set of seismological measurements with controlled sources - supplementary fileThis document provides supplementary information for data of seismological field measurements with controlled sources recorded in the course of the Infra-AUV project. The documents provide information how to access the data, coordinates and times of the controlled source excitation and a map.
PTB-OAR2024 · Archive
Additional data for the publication "Cryogenic fiber-coupled electro-optic characterization platform for high-speed photodiodes"We have developed a cryogenic characterization platform for ultrafast photodiodes, whose time domain responses are extracted by electro-optic sampling using femtosecond laser pulses in a pump-probe configuration. The excitation of the photodiodes with the pump beam and the electro-optic sampling crystals with the probe beam are realized in a fully fiber-coupled manner. This allows us to use the ch