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Title: Reduction of stored-particle background by a magnetic pulse method at the KATRIN experiment

Journal Article · · European Physical Journal. C, Particles and Fields
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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 electrons is achieved by a MAC-E filter spectrometer. A common background source in this setup is the decay of short-lived isotopes, such as 219Rn and 220Rn , in the spectrometer volume. Active and passive countermeasures have been implemented and tested at the KATRIN main spectrometer. One of these is the magnetic pulse method, which employs the existing air coil system to reduce the magnetic guiding field in the spectrometer on a short timescale in order to remove low- and high-energy stored electrons. Here we describe the working principle of this method and present results from commissioning measurements at the main spectrometer. Simulations with the particle-tracking software Kassiopeia were carried out to gain a detailed understanding of the electron storage conditions and removal processes.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Univ. of North Carolina, Chapel Hill, NC (United States); Duke Univ., Durham, NC (United States). Triangle Universities Nuclear Laboratory
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); Helmholtz Association (HGF); German Federal Ministry of Education and Research (BMBF); Ministry of Education, Youth and Sports of the Czech Republic (MEYS)
Contributing Organization:
KATRIN collaboration
Grant/Contract Number:
AC02-05CH11231; FG02-97ER41020; FG02-94ER40818; SC0004036; FG02-97ER41033; FG02-97ER41041; SC0011091
OSTI ID:
1506349
Alternate ID(s):
OSTI ID: 1619348; OSTI ID: 1658828; OSTI ID: 1658957; OSTI ID: 22747182
Journal Information:
European Physical Journal. C, Particles and Fields, Journal Name: European Physical Journal. C, Particles and Fields Journal Issue: 9 Vol. 78; ISSN 1434-6044
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

References (32)

Focal-plane detector system for the KATRIN experiment
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journal April 2015
The wire electrode system for the KATRIN main spectrometer journal April 2010
Technical design and commissioning of the KATRIN large-volume air coil system journal February 2018
Background processes in the KATRIN main spectrometer journal September 2017
Next generation KATRIN high precision voltage divider for voltages up to 65kV journal October 2013
Measurement of the gas-flow reduction factor of the KATRIN DPS2-F differential pumping section journal February 2012
Calculations and TPMC simulations of the reduction of radioactive decays of a noble gas by cryo-panels journal April 2017
Background due to stored electrons following nuclear decays in the KATRIN spectrometers and its impact on the neutrino mass sensitivity journal January 2013
A Data-Analysis and Sensitivity-Optimization Framework for the KATRIN Experiment text January 2014
A pulsed, mono-energetic and angular-selective UV photo-electron source for the commissioning of the KATRIN experiment journal June 2017
Study of background and transmission properties of the KATRIN spectrometers text January 2013
Atomic Masses of Tritium and Helium-3 journal January 2015
Electromagnetic design of the large-volume air coil system of the KATRIN experiment journal August 2013
Kassiopeia: a modern, extensible C++ particle tracking package journal May 2017
Results of the first Cool-down of the KATRIN Cryogenic Pumping Section journal September 2017
The KATRIN superconducting magnets: overview and first performance results journal August 2018
Commissioning of the vacuum system of the KATRIN Main Spectrometer journal April 2016
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Validation of a model for radon-induced background processes in electrostatic spectrometers journal June 2013
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Properties of 83 m Kr conversion electrons and their use in the KATRIN experiment journal February 2018
High-voltage monitoring with a solenoid retarding spectrometer at the KATRIN experiment journal June 2014
Commissioning and detailed results of KATRIN inner loop tritium processing system at Tritium Laboratory Karlsruhe journal June 2015
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Precision high voltage divider for the KATRIN experiment journal October 2009
The Windowless Gaseous Tritium Source (WGTS) of the KATRIN experiment journal September 2017
A method for measuring the electron antineutrino rest mass
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  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 240, Issue 2 https://doi.org/10.1016/0168-9002(85)90640-0
journal October 1985
Upper limit on the electron antineutrino mass from the Troitsk experiment journal December 2011
A solenoid retarding spectrometer with high resolution and transmission for keV electrons journal February 1992
Monte Carlo simulation of gas flow through the KATRIN DPS2-F differential pumping system journal June 2006
Monitoring of the operating parameters of the KATRIN Windowless Gaseous Tritium Source journal October 2012
The Cryogenic Pumping Section of the KATRIN Experiment journal June 2010

Cited By (2)

Impact of a cryogenic baffle system on the suppression of radon-induced background in the KATRIN Pre-Spectrometer journal October 2018
Impact of a cryogenic baffle system on the suppression of radon-induced background in the KATRIN Pre-Spectrometer preprint January 2018

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS