| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:32 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2018 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Development of a small Time Projection Chamber test detector model with gas for laboratory studies
Authors:
Mihaela PÂRVU(1), Alice PĂUN(1), I. LAZANU(1)
Affiliation:
1)University of Bucharest, Faculty of Physics, POBox MG-11, Măgurele-Bucharest
E-mail
alice012996@gmail.com
Keywords:
TPC detectors, air, electron drift, electric field modelling
Abstract:
The TPC is an advanced detector technology suitable for large scale detectors for a wide range of particle physics applications. The small apparatus presented in this contribution is developed in the Faculty of Physics. Two disks at a distance of 11 cm formed the cathode and the anode of a gridded ionization chamber. The screening grid was mounted in the drift space at 4 mm from the anode. The uniformity of the electric field is ensured by shaping rings positioned equidistantly at 1 cm, enclosing the active air volume. A supplementary disk at 1 cm above the anode defines an ionization chamber if HV is applied. All the electrodes and rings are made from copper and they are held in place by teflon bars and nylon spacers. Simulations for modelling the electric field inside the detector are in progress.
In the chamber, the ionization electrons produced after the irradiation with a beta source (90Sr) are accelerated by the field between the cathode and grid. The signals are amplified using a voltage sensitive preamplifier with no pulse formation. A preliminary study of ionization electron drifting was carried out for electric fields up to 1.5 kV and experiments are in progress.
|
|
|
|