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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:10 |
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Conference: Bucharest University Faculty of Physics 2023 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
TPC - A tool of discovery
Authors:
Oana SÎRBU (1,2), Dimiter BALABANSKI (2), Mikolaj CWIOK (3), Wojciech DOMINIK (3), Magdalena KUICH (3), Ștefan NICULAE (2), Adrian ROTARU (2)
Affiliation:
1) Faculty of Physics, University of Bucharest, POBox MG-11, Bucharest-Magurele, Romania
2) Extreme Light Infrastructure – Nuclear Physics, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH), 077125 Bucharest-Magurele, Romania
3) Faculty of Physics, University of Warsaw, Warsaw, Poland
E-mail
oana.sirbu@eli-np.ro
Keywords:
time-projection chamber, GEM, triple-alpha disintegration, kinematic reconstruction, particle identification
Abstract:
The mini-eTPC detector, located at ELI-NP, is a 4-π gas-based time-projection chamber, used to study photonuclear reactions at astrophysical energies. The main feature of this detector system is that the gas inside of it functions as both the target of interest and also as detection medium. It uses an electronic read-out system, based on GEM (Gas Electron Multipliers, developed at CERN) and a segmented anode with 256 channels. Its main purpose is to study how 12C and 16O isotopes are produced in stellar environments. The detector is designed to work with transparent primary beams (neutrons or gamma) to perform inverse reactions (neutrons on 12C, resulting in triple alpha disintegration) and measure the production cross-sections of the direct reaction, triple alpha to 12C. This system was jointly developed in collaboration with Faculty of Physics, University of Warsaw and the Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH). In the current work, we present the commissioning experiment that took place at the 3MV Tandetron Accelerator at IFIN-HH, using a primary neutron beam on CO2 as gas target. We will show the kinematic reconstruction of the resultant events, a method for particle identification using stopping power analysis and the relevant polar and azimuthal distributions of the reactants, in the detector reference frame.
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