We analyse the performance of a gas time projection chamber (TPC) as a high-performance
gamma-ray telescope and polarimeter in the e+ e− pair-creation regime. We use data …

The technological prototype of the CALICE highly granular silicon–tungsten electromagnetic
calorimeter (SiW-ECAL) was tested in a beam at DESY in 2017. The setup comprised seven …

A gas Time Projection Chamber can be used for gamma-ray astronomy with excellent
angular-precision and sensitivity to faint sources, and for polarimetry, through the …

Current γ-ray telescopes suffer from a gap in sensitivity in the energy range between 100
keV and 100 MeV, and no polarisation measurement has ever been done on cosmic …

The SuperFGD detector will be a novel and important upgrade to the ND280 near detector
for both the T2K and Hyper-Kamiokande projects. The main goal of the ND280 upgrade is to …

HARPO: beam characterization of a TPC for gamma-ray polarimetry and high angular-
resolution astronomy in the MeV-GeV range Page 1 Journal of Physics: Conference Series …

We designed and built an experimental apparatus based on a time projection chamber, a
novel scheme for high performance γ-ray astronomy and polarimetry in the γ→ e+ e-regime …

Current γ-ray telescopes based on photon conversions to electron-positron pairs, such as
Fermi, use tungsten converters. They suffer of limited angular resolution at low energies, and …

The “long slab” is a new prototype for the SiW-Ecal, a silicon tungsten electromagnetic
calorimeter for the International Large Detector (ILD) at the future International Linear …

We presented in 2014 the very first data from a polarised gamma-ray beam between 1.7 and
74MeV. We now show the results of their analysis, and in particular the polarimetry …