Commissioning of the vacuum system of the KATRIN Main Spectrometer
Name
Commissioning of the vacuum.pdf
Size
10.15 MB
Format
Adobe PDF
Checksum (MD5)
3672a1a4038866c4dfe7afd12d86a7a4
Author(s)
Barrett, John Patrick
Formaggio, Joseph A
Furse, Daniel Lawrence
Solomon-Oblath, Noah
Date Issued
April 2016
Journal
Journal of Instrumentation
Publisher
IOP Publishing
Citation
Arenz, M. et al. “Commissioning of the Vacuum System of the KATRIN Main Spectrometer.” Journal of Instrumentation 11.04 (2016): P04011–P04011. © 2017 IOP Publishing
Version
Final published version
Abstract
The KATRIN experiment will probe the neutrino mass by measuring the β-electron energy spectrum near the endpoint of tritium β-decay. An integral energy analysis will be performed by an electro-static spectrometer (``Main Spectrometer''), an ultra-high vacuum vessel with a length of 23.2 m, a volume of 1240 m[superscript 3], and a complex inner electrode system with about 120 000 individual parts. The strong magnetic field that guides the β-electrons is provided by super-conducting solenoids at both ends of the spectrometer. Its influence on turbo-molecular pumps and vacuum gauges had to be considered. A system consisting of 6 turbo-molecular pumps and 3 km of non-evaporable getter strips has been deployed and was tested during the commissioning of the spectrometer. In this paper the configuration, the commissioning with bake-out at 300 °C, and the performance of this system are presented in detail. The vacuum system has to maintain a pressure in the 10[superscript −11] mbar range. It is demonstrated that the performance of the system is already close to these stringent functional requirements for the KATRIN experiment, which will start at the end of 2016.
MIT Department
Haystack Observatory
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Creative Commons Attribution 3.0 Unported license
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DOI of Published Version
http://dx.doi.org/10.1088/1748-0221/11/04/p04011
