Résumé du preprint Irfu-14-07

Irfu-14-07
A MicroMegas neutron beam imaging detector at the n_TOF facility at CERN"
F. Belloni
The determination of neutron induced cross sections demands a precise knowledge of the neutron beam profile. Different experiments have adopted different detectors. At the n_TOF facility [1] the neutron beam profile is determined with a MicroMegas detector equipped with a neutron to charged particles converter, allowing to exploit ionization for detection purposes. This report summarizes the results obtained in 4 years of operation of the “XYmicromegas” detector, as well as in the test of the “PXMG-micromegas” detector at the n_TOF facility at CERN. A brief introduction about micromegas detectors and the differences between bulk and microbulk technology is first reported, followed by simulations allowing to draw considerations to establish the best image reconstruction method. The description of the two detectors and the data analysis succeed in chronological order.