Monitoring of the operating parameters of the KATRIN Windowless Gaseous Tritium Source

Babutzka, M.; Bahr, Matthew; Bonn, J.; Bornschein, B.; Dieter, Amadeus; Drexlin, G.; Eitel, K.; Fischer, Sebastian; Glück, F.; Grohmann, Steffen; Hötzel, M.; James, Tim M.; Käfer, Wolfgang; Leber, Michelle; Monreal, B.; Priester, F.; Röllig, M.; Schlösser, M.; Schmitt, U.; Sharipov, Felix; Steidl, M.; Sturm, M.; Telle, Helmut H.; Titov, N.

doi:10.1088/1367-2630/14/10/103046

Cited by 81 publications

(96 citation statements)

References 42 publications

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“…This includes the I nternational T hermonuclear E xperimental R eactor (ITER) project and the KA rlsruhe TRI tium N eutrino (KATRIN) experiment, in which specifically the tritiated isotopologues T 2 , DT, and HT need to be accounted and monitored with high accuracy. For example, in KATRIN, the tritiated isotopologues need to be determined with relative concentration precision of less than 0.1% . In this latter context, the main thrust of the work reported here has been to obtain some of the vital data necessary for accurate calibration of the in‐line, near real‐time Raman analysis system, which is to be used for continuous long‐term monitoring of the injected and circulating gas in the windowless gaseous tritium source of the KATRIN apparatus.…”

Section: Introductionmentioning

confidence: 99%

Accurate depolarization ratio measurements for all diatomic hydrogen isotopologues

James

Schlösser

Fischer

et al. 2013

J Raman Spectroscopy

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The Raman depolarization ratios for individual Q1(J”) branch lines of all diatomic hydrogen isotopologues – H2, HD, D2, HT, DT, and T2 – were measured, for all rotational levels with population larger than 1/100 relative to the Boltzmann maximum at room temperature. For these measurements, the experimental setup normally used for the monitoring of the tritiated hydrogen molecules at KArlsruhe TRItium Neutrino experiment was adapted to optimally control the excitation laser power and polarization, and to precisely define the Raman light collection geometry. The measured Raman depolarization values were compared to theoretical values, which are linked to polarizability tensor quantities. For this, the ‘raw data’ were corrected taking into account distinct aspects affecting Raman depolarization data, including (1) excitation polarization impurities; (2) extended Raman excitation volumes; and (3) Raman light collection over finite solid angles. Our corrected depolarization ratios of the hydrogen isotopologues agree with the theoretical values (based on ab initio quantum calculations by R.J. LeRoy, University of Waterloo, Canada) to better than 5% for nearly all of the measured Q1(J”) lines, with 1σ confidence level. The results demonstrate that reliable, accurate Raman depolarization ratios can be extracted from experimental measurements, which may be substantially distorted by excitation polarization impurities and by geometrical effects. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Accurate depolarization ratio measurements for all diatomic hydrogen isotopologues

James

Schlösser

Fischer

et al. 2013

J Raman Spectroscopy

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“…The 70 m long KATRIN setup (see figure 1) combines a windowless gaseous tritium source (WGTS) of high stability and luminosity with a large electrostatic retarding spectrometer with an energy resolution of < 1 eV [6,7,8]. A magnetic guidance system adiabatically transports the electrons created in the molecular tritium source towards the spectrometer where the energy analysis takes place.…”

Section: The Katrin Experimentsmentioning

confidence: 99%

Status of the KATRIN Experiment and Prospects to Search for keV-mass Sterile Neutrinos in Tritium β-decay

Mertens

2015

Physics Procedia

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In this contribution the current status and future perspectives of the Karlsruhe Tritium Neutrino (KATRIN) Experiment are presented. The prime goal of this single β-decay experiment is to probe the absolute neutrino mass scale with a sensitivity of 200 meV (90% CL). We discuss first results of the recent main spectrometer commissioning measurements, successfully verifying the spectrometer's basic vacuum, transmission and background properties. We also discuss the prospects of making use of the KATRIN tritium source, to search for sterile neutrinos in the multi-keV mass range constituting a classical candidate for Warm Dark Matter. Due to the very high source luminosity, a statistical sensitivity down to active-sterile mixing angles of sin 2 θ < 1 · 10 −7 (90% CL) could be reached.

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“…The electron energy is determined by the main spectrometer (f ), which follows the MAC-E filter principle. An integral measurement is performed by determining the electron rate at the FPD (g) at different filter energies of the main spectrometer of the spectrometer to the data, taking into account important parameters such as the final states distribution and the energy loss spectrum and other systematic corrections [1,15]. The spectrometer high-voltage is monitored by a pair of precision high-voltage dividers [16,17] that support voltages up to 35 and 65 kV, respectively.…”

Section: Introductionmentioning

confidence: 99%

A pulsed, mono-energetic and angular-selective UV photo-electron source for the commissioning of the KATRIN experiment

et al. 2017

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The KATRIN experiment aims to determine the neutrino mass scale with a sensitivity of 200 meV/c 2 (90% C. L.) by a precision measurement of the shape of the tritium β-spectrum in the endpoint region. The energy analysis of the decay electrons is achieved by a MAC-E filter spectrometer. To determine the transmission properties of the KATRIN main spectrometer, a mono-energetic and angularselective electron source has been developed. In preparation for the second commissioning phase of the main spectrometer, a measurement phase was carried out at the KATRIN monitor spectrometer where the device was operated in a MAC-E filter setup for testing. The results of these measurements are compared with simulations using the particletracking software "Kassiopeia", which was developed in the KATRIN collaboration over recent years.

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Monitoring of the operating parameters of the KATRIN Windowless Gaseous Tritium Source

Abstract: The KArlsruhe TRItium Neutrino (KATRIN) experiment will measure the absolute mass scale of neutrinos with a sensitivity of m ν = 200 meV/c 2 by high-precision spectroscopy close to the tritium β-decay

Cited by 81 publications

References 42 publications

Accurate depolarization ratio measurements for all diatomic hydrogen isotopologues

Accurate depolarization ratio measurements for all diatomic hydrogen isotopologues

Status of the KATRIN Experiment and Prospects to Search for keV-mass Sterile Neutrinos in Tritium β-decay

A pulsed, mono-energetic and angular-selective UV photo-electron source for the commissioning of the KATRIN experiment

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