| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5492857 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2017 | 5 Pages |
Abstract
HARPO is an R&D programme to characterise the operation of a TPC (Time Projection Chamber) as a high angular-resolution and sensitivity telescope and polarimeter for γ rays from cosmic sources. It represents a first step towards a future space instrument. A 30 cm cubic TPC demonstrator was built, and filled with 2 bar argon-based gas. It was put in a polarised γ-ray beam at the NewSUBARU accelerator in Japan in November 2014. Data were taken at different photon energies from 1.7 MeV to 74 MeV, and with different polarisation configurations. The electronics setup is described, with an emphasis on the trigger system. The event reconstruction algorithm is quickly described, and preliminary measurements of the polarisation of 11 MeV photons are shown.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Y. Geerebaert, Ph. Gros, S. Amano, D. Attié, D. Bernard, P. Bruel, D. Calvet, P. Colas, S. Daté, A. Delbart, M. Frotin, B. Giebels, D. Götz, S. Hashimoto, D. Horan, T. Kotaka, M. Louzir, Y. Minamiyama, S. Wang,