A5037453242- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Neutrino Physics Research
- Radiation Therapy and Dosimetry
- Atomic and Subatomic Physics Research
- Muon and positron interactions and applications
- Nuclear reactor physics and engineering
- Dark Matter and Cosmic Phenomena
- Radioactive Decay and Measurement Techniques
- Atomic and Molecular Physics
- Soil Moisture and Remote Sensing
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- X-ray Spectroscopy and Fluorescence Analysis
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Electron and X-Ray Spectroscopy Techniques
- Photocathodes and Microchannel Plates
- Radiopharmaceutical Chemistry and Applications
- Advanced Radiotherapy Techniques
- Diamond and Carbon-based Materials Research
- Graphite, nuclear technology, radiation studies
- Calibration and Measurement Techniques
- Pulsed Power Technology Applications
- Radiation Effects in Electronics
Physikalisch-Technische Bundesanstalt
2015-2024
Czech Academy of Sciences, Nuclear Physics Institute
2007-2021
University of Münster
2009-2021
Paul Scherrer Institute
2016
CONUS is a novel experiment aiming at detecting elastic neutrino nucleus scattering in the fully coherent regime using high-purity Germanium (Ge) detectors and reactor as antineutrino ($\bar\nu$) source. The detector setup installed commercial nuclear power plant Brokdorf, Germany, very small distance to core order guarantee high flux of more than 10$^{13}\bar\nu$/(s$\cdot$cm$^2$). For experiment, good understanding neutron-induced background events required, neutron recoil signals can mimic...
Surface soil moisture (SSM) products derived from microwave remote sensing technology are currently operational at coarse resolutions (10-40 km) and global scale. Despite the utility of existing Earth Observation (EO) SSM products, there is significant scientific interest in enhancing ability to resolve fine-scale surface heterogeneity. High spatial resolution patterns (e.g., 0.1-1 can improve our quantitative understanding soil-vegetation-atmosphere system enhance applications such as...
Monitoring soil moisture is a challenging task due to its complex spatial patterns. In recent years, cosmic-ray neutron sensing has gained popularity for ability provide integral measurements over few hectares horizontally and decimeters vertically, covering representative volume many research questions in various landscapes. However, interpreting signals using averaging methods becomes increasingly difficult as the heterogeneity of observable increases.As part SoMMet project, three field...
In 2024, Germany’s national metrology institute, the Physikalisch-Technischne Bundesanstalt (PTB), signed a sponsorship agreement with Operational Company of Environmental Research Station Schneefernerhaus (Umweltforschungsstation, UFS) for operation, maintenance and upgrade Bonner sphere-based neutron spectrometer located at UFS. The UFS was established in 1999 is highest research station an altitude 2650 meters, just below summit Mt. Zugspitze, where it houses wide range...
The KATRIN experiment aims at the direct model-independent determination of average electron neutrino mass via measurement endpoint region tritium beta decay spectrum. spectrometer MAC-E filter type is used, requiring very high stability electric filtering potential. This work proves feasibility implanted 83Rb/83mKr calibration sources which will be utilised in additional monitor sharing voltage with main KATRIN. source employs conversion electrons 83mKr continuously generated by 83Rb. K–32...
The KATRIN experiment will measure the absolute mass scale of neutrinos with a sensitivity mν = 200meV/c2 by means an electrostatic spectrometer set close to tritium β-decay endpoint at 18.6keV. Fluctuations energy must be under control within ±60mV (±3ppm). Since precise voltage measurement in range tens kV is on edge current technology, nuclear standard deployed additionally. Parallel main same retarding potential applied monitor 17.8-keV K-conversion electrons 83mKr. This article...
The method of direct neutrino mass determination based on the kinematics tritium beta decay, which is adopted by KATRIN experiment, makes use a large, high-resolution electrostatic spectrometer with magnetic adiabatic collimation. In order to target sensitivity m(ν) 0.2eV/c2, detailed understanding electromagnetic properties electron essential, requiring comprehensive calibration measurements dedicated sources. this paper we report prototype photoelectron source providing narrow energy...
The neutron ambient dose equivalent induced by galactic cosmic ray-like (1 GeV/u 56Fe) radiation stopped in a thick aluminum shield was measured at different angles with GSI ball, the standard TLD (thermoluminescent dosimeters) based dosimeter for area monitoring facility. In order to measure reliably large angles, modified version of including set three more sensitive TLD600H/700H cards, instead one TLD600/700, cards used. balls were calibrated reference fields 241Am-Be(alpha,n) available...
Space agencies have recognized the risks of astronauts’ exposure to space radiation and are developing complex model-based risk mitigation strategies. In foundation these models, there still significant gaps knowledge concerning nuclear fragmentation reactions which need be addressed by ground-based experiments. There is a lack data on neutron light ion production heavy ions, an important component galactic cosmic (GCR). A research collaboration has been set up characterize secondary field...
Abstract Knowledge of the characteristics secondary neutrons produced by interaction Galactic Cosmic Radiation with spacecraft shielding materials is becoming increasingly important for predicting and mitigating biological risks space explorers during deep-space travel. Hadron accelerators medical applications are well suited to reproduce part conditions found in terms ion species energies. The objectives this work measure neutron spectra proton helium beams hitting an aluminum target...
The goal of this work is to characterize the secondary neutron spectra produced by 1 GeV/u 56 Fe beam colliding with a thick cylindric aluminum target and perform quantitative comparison simulated results obtained Monte Carlo codes. measurements were performed using extended-range Bonner sphere spectrometers at two positions (15° 40°) respect direction. radiation field was four codes (FLUKA, MCNP6, Geant4 PHITS) several physical models nuclei transport interaction. Neutron proton energy...
We report on spectroscopy and time-of-flight measurements using an 18 keV fast-pulsed photoelectron source of adjustable intensity, ranging from single photoelectrons per pulse to 5 μs at repetition rates up 10 kHz. Short pulses between 40 ns 4 in length were produced by switching light emitting diodes with central output wavelengths 265 257 nm, the deep ultraviolet (or UV-C) regime, kHz frequencies. Such sources can be useful calibration devices for testing properties high-resolution...
Conversion electrons emitted from 83mKr implanted into a solid substrate will serve as powerful tool for monitoring of the energy scale stability in KATRIN neutrino experiment. An appropriate description conversion line shape is essential to determine electrons. It shown that Doniach-Šunjić gives significantly better fit electron spectra than previously used double Voigt model. The were obtained with MAC-E filter monitor spectrometer.
Detectors based on single crystal synthetic diamond are well suited for high resolution spectrometry of fast neutrons. Their radiation hardness and ability to operate in extreme conditions make them suitable neutron plasma diagnostics the ITER project. The task via requires a good knowledge response matrix detector within wide energy range. In this work, Monte Carlo particle transport code NRESP is used calculation functions detectors range 7 MeV En 16 MeV. code, originally developed at...
The KATRIN experiment is going to search for the average mass of electron antineutrino with a sensitivity 0.2 eV/c2. It uses retardation spectrometer MAC-E filter type accurately measure shape spectrum at endpoint tritium beta decay. In order achieve planned transmission properties have be understood high precision all initial conditions. For this purpose an source has been developed that emits single electrons adjustable total energy and emission angle. pointlike can moved across full flux...
Detectors based on single crystal synthetic diamond show promise as neutron spectrometers for the ITER project. In this work, stability of response function two detectors was tested at Physikalisch-Technische Bundesanstalt (PTB) accelerator using a 14 MeV field and method time-resolved fluence monitoring. addition, measurements PTB ion-microbeam were made to investigate charge collection properties in more detail. The 12C(n,α)9Be peak one found be stable within 1% after irradiation with 8 ×...
In this paper we describe a new variant of null ellipsometry to determine thicknesses and optical properties thin films on substrate at cryogenic temperatures. the PCSA arrangement polarizer compensator are placed before analyzer after it. Usually, in rotated find searched minimum intensity. our rotate instead, both being incoming beam substrate. Therefore polarisation analysis reflected can be realized by an fixed orientation. We developed method for investigations inside vacuum chamber...