Würzburg 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 21: Experimentelle Methoden der Astroteilchenphysik I
T 21.5: Vortrag
Montag, 19. März 2018, 17:05–17:20, Z6 - SR 2.013
MC simulations of KATRIN’s source on GPUs* — •Norman Haußmann for the KATRIN collaboration — Bergische Universität Wuppertal
The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to measure the effective neutrino mass in a model-independent way with a sensitivity of 200 meV/c2 (90 % C.L.).
The electrons in the Windowless Gaseous Tritium Source (WGTS), emanating from tritium decay, are emitted isotropically and guided magnetically. Thereby, the electrons undergo different effects, changing their kinetic energy, and angle to the guiding field. The major influence herein is elastic and inelastic scattering.
The differential electron spectrum, emitted at the source, needs to be well-understood in order to monitor the source parameters, to look for sterile neutrinos, and to fit the neutrino mass.
Monte-Carlo simulations of the source need high computational power. So far, KATRIN’s own software package KASSIOPEIA was used to perfom these simulations. In order to improve the simulation speed by at least two orders of magnitude the code has been rewritten to run on GPUs aiming at a full MC simulation of the experiment.
Solutions for the obstacles of MC simulations on GPUs, optimizations, and speed comparisons are presented in this talk.
* Gefördert durch das BMBF.