HARPO: beam characterization of a TPC for gamma-ray polarimetry and high angular-resolution astronomy in the MeV-GeV range

Abstract

A time projection chamber (TPC) can be used to measure the polarization of gamma rays with excellent angular precision and sensitivity in the MeV-GeV energy range through the conversion of photons to e+e- pairs. The Hermetic ARgon POlarimeter (HARPO) prototype was built to demonstrate this concept. It was recently tested in the polarized photon beam at the NewSUBARU facility in Japan. We present this data-taking run, which demonstrated the excellent performance of the HARPO TPC.

12 pages, 11 figures, presented at the 7th Symposium on large TPCs for low-energy rare event detection, Paris, France, 15-17 December 2014

References in corpus (2)

• Polarization of the Crab pulsar and nebula as observed by the Integral/IBIS telescope
• PMm2: large photomultipliers and innovative electronics for the next-generation neutrino experiments

Cited by in corpus (6)

• Gaseous and dual-phase time projection chambers for imaging rare processes
• The future of gamma-ray astronomy
• Performance measurement of HARPO: a Time Projection Chamber as a gamma-ray telescope and polarimeter
• Linear Polarization, Circular Polarization, and Depolarization of Gamma-ray Bursts: A Simple Case of Jitter Radiation
• Sealed operation, and circulation and purification of gas in the HARPO TPC
• Measurement of 1.7 to 74 MeV polarised gamma rays with the HARPO TPC