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View article: Adiabatic light guide with S-shaped strips
Adiabatic light guide with S-shaped strips Open
A light guide is an essential part of many scintillator counters and light collection systems. Our main interest is a light guide for a thin, wide scintillator that has high light transmission while converting the area of the light source …
View article: Adiabatic Light Guide with S-shaped Strips
Adiabatic Light Guide with S-shaped Strips Open
A light guide is an essential part of many scintillator counters and light collection systems. Our main interest is a light guide for a thin wide scintillator which has high light transmission while converting the area of the light source …
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: Deeply virtual Compton scattering cross section at high Bjorken $x_B$
Deeply virtual Compton scattering cross section at high Bjorken $x_B$ Open
We report high-precision measurements of the Deeply Virtual Compton Scattering (DVCS) cross section at high values of the Bjorken variable $x_B$. DVCS is sensitive to the Generalized Parton Distributions of the nucleon, which provide a thr…
View article: The design, construction, and commissioning of the KATRIN experiment
The design, construction, and commissioning of the KATRIN experiment Open
The KArlsruhe TRItium Neutrino (KATRIN) experiment, which aims to make a direct and model-independent determination of the absolute neutrino mass scale, is a complex experiment with many components. More than 15 years ago, we published a t…
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: The KATRIN Neutrino Mass Measurement: Experiment, Status, and Outlook
The KATRIN Neutrino Mass Measurement: Experiment, Status, and Outlook Open
The Karlsruhe Tritium Neutrino (KATRIN) experiment will provide a measurement of the effective electron-neutrino mass, $m(ν_e)$, based on a precision measurement of the tritium beta decay spectrum near its endpoint. The effective mass is a…
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: The APEX experiment at JLab. Searching for the vector boson<i>A</i>′ decaying to<i>e</i><sup>+</sup><i>e</i><sup>−</sup>
The APEX experiment at JLab. Searching for the vector boson<i>A</i>′ decaying to<i>e</i><sup>+</sup><i>e</i><sup>−</sup> Open
Jefferson Lab’s A′ Experiment (APEX) will search for a new vector boson, the A′, in the mass range 65 MeV < mA′ < 550 MeV, with sensitivity for the A′ coupling to electrons of α′ > 6 × 10−8α, where α = e2/4π. New vector bosons with such sm…
View article: Measurement of Parity-Violating Asymmetry in Electron-Deuteron Inelastic Scattering
Measurement of Parity-Violating Asymmetry in Electron-Deuteron Inelastic Scattering Open
Jefferson Lab-CEBAF. The parity-violating asymmetries between a longitudinally-polarized electron beam and an unpolarized deuterium target have been measured recently. The measurement covered two kinematic points in the deep inelastic scat…
View article: Simple modification of Compton polarimeter to redirect synchrotron radiation
Simple modification of Compton polarimeter to redirect synchrotron radiation Open
Synchrotron radiation produced as an electron beam passes through a bending magnet is a significant source of background in many experiments. Using modeling, we show that simple modifications of the magnet geometry can reduce this backgrou…
View article: Measurement of parity-violating asymmetry in electron-deuteron inelastic scattering
Measurement of parity-violating asymmetry in electron-deuteron inelastic scattering Open
The parity-violating asymmetries between a longitudinally-polarized electron\nbeam and an unpolarized deuterium target have been measured recently. The\nmeasurement covered two kinematic points in the deep inelastic scattering\nregion and …