6533b7d9fe1ef96bd126cae2

RESEARCH PRODUCT

The development of the KATRIN magnet system

subject

description

The Karlsruhe Tritium Neutrino Experiment KATRIN aims to measure the mass of the electron neutrino with unprecedented accuracy. For this experiment a special magnet system with about 30 LHe bath cooled superconducting magnets grouped in 10 different sections needs to be developed. The magnetic fields required for the electron transport and spectrometer resolution have a level between 3 and 6 T and must be constant in time over months. Further requirements for field homogeneity and tritium compatibility lead to a unique magnet system. A challenging task of this system is to keep the 10 m beam tube of the source magnet at a constant temperature of 30 K with extremely high temperature stability in time and length. This paper presents the general setup and the magnet system data, shows the main requirements, and gives a status about the ongoing work. Furthermore, the cooling concept of the beam tube is discussed.