HypeX: high yield polarimetry experiment in x-rays

Davide Fiorina; Elisabetta Baracchini; Giorgio Dho; Paolo Soffitta; Samuele Torelli; David J. G. Marques; Flaminia Di Giambattista; Atul Prajapati; Enrico Costa; Sergio Fabiani; Fabio Muleri; Alessandro Di Marco; Giovanni Mazzitelli

doi:10.1117/12.3021559

27 August 2024 HypeX: high yield polarimetry experiment in x-rays

Davide Fiorina, Elisabetta Baracchini, Giorgio Dho, Paolo Soffitta, Samuele Torelli, David J. G. Marques, Flaminia Di Giambattista, Atul Prajapati, Enrico Costa, Sergio Fabiani, Fabio Muleri, Alessandro Di Marco, Giovanni Mazzitelli

Author Affiliations +

Proceedings Volume 13103, X-Ray, Optical, and Infrared Detectors for Astronomy XI; 1310318 (2024) https://doi.org/10.1117/12.3021559
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

We present the development of a large-volume, increased field-of-view Time Projection Chamber (TPC) for x-ray polarimetry, utilizing a triple-GEM detector with optical readout. Initially optimized for directional Dark Matter searches, this system employs a scientific CMOS (sCMOS) camera and a PMT to detect secondary scintillation light produced during the TPC amplification stage. A prototype TPC with a cylindrical active volume of radius 3.7 cm and height 5 cm was tested at the INAF-IAPS calibration facility in Rome, Tor Vergata to establish the instrument’s sensitivity to low-energy electron direction. Complete reconstruction of electrons in the 10-60 keV range with angular resolution down to 15° was measured, resulting in inferred modulation factors up to 0.9. We will present the initial results from our test campaign, which confirm effective photoelectron tracking in the tens of keV range with a strong modulation factor. This innovative approach could extend x-ray polarimetry sensitivity to higher energies and possibly enable the observation of rapid transient phenomena, such as Gamma Ray Bursts (GRBs) and solar flares, thus contributing significantly to x-ray astronomy.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Davide Fiorina, Elisabetta Baracchini, Giorgio Dho, Paolo Soffitta, Samuele Torelli, David J. G. Marques, Flaminia Di Giambattista, Atul Prajapati, Enrico Costa, Sergio Fabiani, Fabio Muleri, Alessandro Di Marco, and Giovanni Mazzitelli "HypeX: high yield polarimetry experiment in x-rays", Proc. SPIE 13103, X-Ray, Optical, and Infrared Detectors for Astronomy XI, 1310318 (27 August 2024); https://doi.org/10.1117/12.3021559

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