B. Krasch
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View article: KIT Superconducting Undulator Development Story of a successful industrial collaboration & future prospects
KIT Superconducting Undulator Development Story of a successful industrial collaboration & future prospects Open
Undulators are X-ray sources widely used in synchrotron storage rings and free-electron laser facilities. With the commercial availability of low-temperature super-conductors, a new type of undulator was born, the superconducting undulator…
View article: HTS Undulator Design Study and First Results
HTS Undulator Design Study and First Results Open
Undulators are X-ray sources that are widely utilised in advanced synchrotron radiation sources and freeelectron laser facilities. Due to sustainability and energy efficiency, the development focuses on small-scale, high-field, and especia…
View article: KIT Superconducting Undulator Development -- Story of a successful industrial collaboration & future prospects
KIT Superconducting Undulator Development -- Story of a successful industrial collaboration & future prospects Open
Undulators are X-ray sources widely used in synchrotron storage rings and free-electron laser facilities. With the commercial availability of low-temperature superconductors, a new type of undulator was born, the superconducting undulator …
View article: The CompactLight Design Study
The CompactLight Design Study Open
CompactLight is a Design Study funded by the European Union under the Horizon 2020 research and innovation funding programme, with Grant Agreement No. 777431. CompactLight was conducted by an International Collaboration of 23 international…
View article: Raman spectroscopy for ortho-para hydrogen catalyst studies
Raman spectroscopy for ortho-para hydrogen catalyst studies Open
For the design of efficient hydrogen liquefaction plants and for the production of accurate ortho-para hydrogen samples, precise knowledge about the kinetics of ortho-para catalysts and accurate ortho-para monitoring is mandatory. Raman sp…
View article: Search for Lorentz-invariance violation with the first KATRIN data
Search for Lorentz-invariance violation with the first KATRIN data Open
Some extensions of the Standard Model of particle physics allow for Lorentz invariance and charge-parity-time invariance violations. In the neutrino sector strong constraints have been set by neutrino-oscillation and time-of-flight experim…
View article: KATRIN: status and prospects for the neutrino mass and beyond
KATRIN: status and prospects for the neutrino mass and beyond Open
The Karlsruhe Tritium Neutrino (KATRIN) experiment is designed to measure a high-precision integral spectrum of the endpoint region of T 2 β decay, with the primary goal of probing the absolute mass scale of the neutrino. After a first tri…
View article: New Constraint on the Local Relic Neutrino Background Overdensity with the First KATRIN Data Runs
New Constraint on the Local Relic Neutrino Background Overdensity with the First KATRIN Data Runs Open
We report on the direct cosmic relic neutrino background search from the first two science runs of the KATRIN experiment in 2019. Beta-decay electrons from a high-purity molecular tritium gas source are analyzed by a high-resolution MAC-E …
View article: Improved eV-scale sterile-neutrino constraints from the second KATRIN measurement campaign
Improved eV-scale sterile-neutrino constraints from the second KATRIN measurement campaign Open
We present the results of the light sterile neutrino search from the second Karlsruhe Tritium Neutrino (KATRIN) measurement campaign in 2019. Approaching nominal activity, 3.76×106 tritium β-electrons are analyzed in an energy window exten…
View article: Improved eV-scale Sterile-Neutrino Constraints from the Second KATRIN Measurement Campaign
Improved eV-scale Sterile-Neutrino Constraints from the Second KATRIN Measurement Campaign Open
We present the results of the light sterile neutrino search from the second KATRIN measurement campaign in 2019. Approaching nominal activity, $3.76 \times 10^6$ tritium $β$-electrons are analyzed in an energy window extending down to $40\…
View article: New Constraint on the Local Relic Neutrino Background Overdensity with the First KATRIN Data Runs
New Constraint on the Local Relic Neutrino Background Overdensity with the First KATRIN Data Runs Open
We report on the direct search for cosmic relic neutrinos using data acquired during the first two science campaigns of the KATRIN experiment in 2019. Beta-decay electrons from a high-purity molecular tritium gas source are analyzed by a h…
View article: Analysis methods for the first KATRIN neutrino-mass measurement
Analysis methods for the first KATRIN neutrino-mass measurement Open
We report on the dataset, data handling, and detailed analysis techniques of the first neutrino-mass measurement by the Karlsruhe Tritium Neutrino (KATRIN) experiment, which probes the absolute neutrino-mass scale via the β-decay kinematic…
View article: First direct neutrino-mass measurement with sub-eV sensitivity
First direct neutrino-mass measurement with sub-eV sensitivity Open
We report the results of the second measurement campaign of the Karlsruhe Tritium Neutrino (KATRIN) experiment. KATRIN probes the effective electron anti-neutrino mass, mν, via a high-precision measurement of the tritium β-decay spectrum c…
View article: First direct neutrino-mass measurement with sub-eV sensitivity
First direct neutrino-mass measurement with sub-eV sensitivity Open
We report the results of the second measurement campaign of the Karlsruhe Tritium Neutrino (KATRIN) experiment. KATRIN probes the effective electron anti-neutrino mass, $m_ν$, via a high-precision measurement of the tritium $β$-decay spect…
View article: Design and Fabrication Concepts of a Compact Undulator with Laser-Structured 2G-HTS Tapes
Design and Fabrication Concepts of a Compact Undulator with Laser-Structured 2G-HTS Tapes Open
To produce small-scale high-field undulators for table-top free electron lasers (FELs), compact designs have been proposed using high temperature superconducting (HTS) tapes, which show both large critical current densities and high critic…
View article: Investigation of Beam Impedance and Heat Load in a High Temperature Superconducting Undulator
Investigation of Beam Impedance and Heat Load in a High Temperature Superconducting Undulator Open
The use of high temperature superconducting (HTS) materials can enhance the performance of superconducting undulators (SCU), which can later be implemented in free electron laser facilities, synchrotron storage rings and light sources. In …
View article: Quantitative Long-Term Monitoring of the Circulating Gases in the KATRIN Experiment Using Raman Spectroscopy
Quantitative Long-Term Monitoring of the Circulating Gases in the KATRIN Experiment Using Raman Spectroscopy Open
The Karlsruhe Tritium Neutrino (KATRIN) experiment aims at measuring the effective electron neutrino mass with a sensitivity of 0.2 eV/c2, i.e., improving on previous measurements by an order of magnitude. Neutrino mass data taking with KA…
View article: High-resolution spectroscopy of gaseous $^{83m}$Kr conversion electrons with the KATRIN experiment
High-resolution spectroscopy of gaseous $^{83m}$Kr conversion electrons with the KATRIN experiment Open
In this work, we present the first spectroscopic measurements of conversion electrons originating fromthe decay ofmetastable gaseous $^{83m}$Kr with the Karlsruhe Tritium Neutrino (KATRIN) experiment. The obtained results represent one of …
View article: Suppression of Penning discharges between the KATRIN spectrometers
Suppression of Penning discharges between the KATRIN spectrometers Open
The KArlsruhe TRItium Neutrino experiment (KATRIN) aims to determine the effective electron (anti)-neutrino mass with a sensitivity of 0.2eV/c$^{2}$ by precisely measuring the endpoint region of the tritium β-decay spectrum. It uses a tand…
View article: Improved Upper Limit on the Neutrino Mass from a Direct Kinematic Method by KATRIN
Improved Upper Limit on the Neutrino Mass from a Direct Kinematic Method by KATRIN Open
We report on the neutrino mass measurement result from the first four-week science run of the Karlsruhe Tritium Neutrino experiment KATRIN in spring 2019. Beta-decay electrons from a high-purity gaseous molecular tritium source are energy …
View article: First transmission of electrons and ions through the KATRIN beamline
First transmission of electrons and ions through the KATRIN beamline Open
The Karlsruhe Tritium Neutrino (KATRIN) experiment is a large-scale effort to probe the absolute neutrino mass scale with a sensitivity of 0.2 eV (90% confidence level), via a precise measurement of the endpoint spectrum of tritium β-decay…
View article: The KATRIN superconducting magnets: overview and first performance results
The KATRIN superconducting magnets: overview and first performance results Open
The KATRIN experiment aims for the determination of the effective electron anti-neutrino mass from the tritium beta-decay with an unprecedented sub-eV sensitivity. The strong magnetic fields, designed for up to 6~T, adiabatically guide β-e…
View article: Calibration of high voltages at the ppm level by the difference of <sup>83m</sup>Kr conversion electron lines at the KATRIN experiment
Calibration of high voltages at the ppm level by the difference of <sup>83m</sup>Kr conversion electron lines at the KATRIN experiment Open
The neutrino mass experiment KATRIN requires a stability of 3 ppm for the retarding potential at − 18.6 kV of the main spectrometer. To monitor the stability, two custom-made ultra-precise high-voltage dividers were developed and built in …
View article: Reduction of stored-particle background by a magnetic pulse method at the KATRIN experiment
Reduction of stored-particle background by a magnetic pulse method at the KATRIN experiment Open
The KATRIN experiment aims to determine the effective electron neutrino mass with a sensitivity of 0.2 eV/c2 (%90 CL) by precision measurement of the shape of the tritium β-spectrum in the endpoint region. The energy analysis of the decay …
View article: Commissioning of the vacuum system of the KATRIN Main Spectrometer
Commissioning of the vacuum system of the KATRIN Main Spectrometer Open
The KATRIN experiment will probe the neutrino mass by measuring the beta-electron energy spectrum near the endpoint of tritium beta-decay. An integral energy analysis will be performed by an electro-static spectrometer (Main Spectrometer),…