The KATRIN Pre-Spectrometer at reduced Filter Energy

Abstract

The KArlsruhe TRItium Neutrino experiment, KATRIN, will determine the mass of the electron neutrino with a sensitivity of 0.2 eV (90% C.L.) via a measurement of the beta-spectrum of gaseous tritium near its endpoint of E_0 =18.57 keV. An ultra-low background of about b = 10 mHz is among the requirements to reach this sensitivity. In the KATRIN main beam-line two spectrometers of MAC-E filter type are used in a tandem configuration. This setup, however, produces a Penning trap which could lead to increased background. We have performed test measurements showing that the filter energy of the pre-spectrometer can be reduced by several keV in order to diminish this trap. These measurements were analyzed with the help of a complex computer simulation, modeling multiple electron reflections both from the detector and the photoelectric electron source used in our test setup.

22 pages, 12 figures

References in corpus (5)

• An upper limit on electron antineutrino mass from Troitsk experiment
• Neutrino physics from precision cosmology
• The KATRIN Pre-Spectrometer at reduced Filter Energy
• Prototype of an angular-selective photoelectron calibration source for the KATRIN experiment
• A UV LED-based fast-pulsed photoelectron source for time-of-flight studies

Cited by in corpus (19)

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• Analysis methods for the first KATRIN neutrino-mass measurement
• Kassiopeia: A Modern, Extensible C++ Particle Tracking Package
• $\beta$-Decay Spectrum, Response Function and Statistical Model for Neutrino Mass Measurements with the KATRIN Experiment
• Background due to stored electrons following nuclear decays in the KATRIN spectrometers and its impact on the neutrino mass sensitivity
• Dead layer on silicon p-i-n diode charged-particle detectors
• First transmission of electrons and ions through the KATRIN beamline
• The KATRIN Pre-Spectrometer at reduced Filter Energy
• Ultra-stable implanted 83Rb/83mKr electron sources for the energy scale monitoring in the KATRIN experiment
• Neutrino Masses
• Modeling of electron emission processes accompanying Radon-$\alpha$-decays within electrostatic spectrometers
• Stochastic Heating by ECR as a Novel Means of Background Reduction in the KATRIN Spectrometers
• Constraints on the Active and Sterile Neutrino Masses from Beta-Ray Spectra: Past, Present and Future
• Suppression of Penning discharges between the KATRIN spectrometers
• The role of electron scattering from registration detector in a MAC-E type spectrometer
• Electromagnetic design of the KATRIN large-volume air coil system