Oct 16 – 20, 2016
Europe/Zurich timezone

Detection of low-energy protons within the neutron β-decay spectrometer aSPECT

Oct 18, 2016, 6:10 PM


Dr Romain Maisonobe (Institut Laue-Langevin)


The antineutrino-electron angular correlation coefficient a is related to the proton recoil spectrum by kinematics. aSPECT measures the integral proton spectrum using magnetic adiabatic collimation and electrostatic retardation. Data acquisition for a 1% measurement of coefficient a was performed during a beam-time in 2013 at the Institut Laue-Langevin in Grenoble. As protons are emitted at low-energy (E_{p,max} = 751.4 eV), the detection occurs after a post-acceleration of the particles (-15 kV) onto a Silicon Drift Detector. The signal is then treated by dedicated electronics. In the 2013 measurements a shaper with non-linear amplification was used in order to avoid saturation effects. In order to quantify the systematic effects related to the proton detection, the electronics chain and the event signals were investigated in details. Correlations between subsequent events were also investigated. Methods to improve the pulse-height resolution of the events, to identify and to correct pile-up were developed and tested. Preliminary results are presented on this poster.

Primary author

Dr Romain Maisonobe (Institut Laue-Langevin)


Mr Alexander Wunderle (Institute of Physics, Uni Mainz) Mr Christian Schmidt (Johannes Gutenberg-Universität Mainz) Dr Ferenc Gluck (Karlsruher Institut für Technologie, Karlsruhe, Germany) Dr Gertrud Konrad (TU Wien, Atominstitut, Austria) Dr Marcus Beck (Helmholtz-Institut Mainz and Johannes Gutenberg Universität Mainz) Dr Martin Simson (Institut Laue-Langevin) Prof. Oliver Zimmer (Institut Laue Langevin) Mr Romain Virot (Institut Laue-Langevin) Dr Stefan Baessler (Department of Physics, University of Virginia, Charlottesville, USA) Torsten Soldner (Institut Laue Langevin) Prof. Werner Heil (Institute of Physics)

Presentation materials