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1.
LAPPD operation using ToFPETv2 PETSYS ASIC
Andrej Seljak, Marko Bračko, Rok Dolenec, Peter Križan, Andrej Lozar, Rok Pestotnik, Samo Korpar, 2023, objavljeni znanstveni prispevek na konferenci

Opis: Single photon sensitive detectors used in high energy physics are, in some applica-tions, required to cover areas the size of several m2, and more specifically in very strong demand with an ever finer imaging and timing capability for Cherenkov Ring Imaging Detector (RICH) configurations. We are evaluating the Large Area Picosecond Photo-detector (LAPPD) produced by INCOM company, as a possible candidate for future RICH detector upgrades. In this work we perform tests on the second generation device, which is capacitively coupled to a custom designed anode back plane, consisting of various pixels and strips varying in size, that allows for connecting various readout systems such as standard laboratory equipment, as well as the TOFPET2 ASIC from PETsys company. Our aim is to evaluate what can be achieved by merging currently available technology, in order to find directions for future developments adapted for specific uses.
Ključne besede: data acquisition circuits, data acquisition concept, front-end electronics for detector readou, digital electronic circuits
Objavljeno v DKUM: 06.02.2024; Ogledov: 195; Prenosov: 9
.pdf Celotno besedilo (1,36 MB)
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2.
Study of the receiving system of a Low Power Tag Detector and its usage in RFID and NFC applications : magistrsko delo
Jovanka Dimkovska, 2022, magistrsko delo

Opis: This work presents an observation of the analog and digital architecture of the reception system of a radio-frequency identification (RFID) reader in the high frequency (HF) domain and the creation of near-field communication (NFC) Application, which is developed for Android and iOS users. This thesis includes a description of RFID and NFC technology, as well as a sufficient amount of information about the standards that define those technologies. The reception system of a given interrogator was thoroughly studied, beginning with the analog signal on the interrogator’s antenna and how it is interpreted in the analog domain for determining the presence of an object in its vicinity. The most emphasis in this thesis was given to the reader when it is in a Tag Detector mode. The Tag Detector mode of the reader is the mode in which the interrogator can detect changes on its antenna. Measurements were taken while testing the Tag Detector at various gain settings of the reception system. To improve the accuracy of those detections, the Tag Detector mode was switched to reader mode, allowing the detected tag’s acknowledgement message to be received. The detection range, as well as the reading range of the interrogator, are also discussed. An NFC application was developed that functions as an interrogator for both the iOS and Android operating systems. The goal of this application is to apply the knowledge we have gained from the study about RFID and NFC communications, as well as the comparison between the tag detection and read ranges of the two types of interrogators.
Ključne besede: Keywords: NFC, RFID, receiver, transmitter, Tag Detector, interrogator, read range, tag detection range
Objavljeno v DKUM: 28.06.2022; Ogledov: 725; Prenosov: 54
.pdf Celotno besedilo (1,92 MB)

3.
Particle identification performance of the prototype aerogel RICH counter for the Belle II experiment
S. Iwata, Samo Korpar, Peter Križan, Rok Pestotnik, Luka Šantelj, Andrej Seljak, Elvedin Tahirović, 2016, izvirni znanstveni članek

Opis: We have developed a new type of particle identification device, called an aerogel ring imaging Cherenkov (ARICH) counter, for the Belle II experiment. It uses silica aerogel tiles as Cherenkov radiators. For detection of Cherenkov photons, hybrid avalanche photo-detectors (HAPDs) are used. The designed HAPD has a high sensitivity to single photons under a strong magnetic field. We have confirmed that the HAPD provides high efficiency for single-photon detection even after exposure to neutron and $\gamma$-ray radiation that exceeds the levels expected in the 10-year Belle II operation. In order to confirm the basic performance of the ARICH counter system, we carried out a beam test at the using a prototype of the ARICH counter with six HAPD modules. The results are in agreement with our expectations and confirm the suitability of the ARICH counter for the Belle II experiment. Based on the in-beam performance of the device, we expect that the identification efficiency at $3.5\,{\rm GeV}/c$ is 97.4% and 4.9% for pions and kaons, respectively. This paper summarizes the development of the HAPD for the ARICH and the evaluation of the performance of the prototype ARICH counter built with the final design components.
Ključne besede: H14, elementary particle physics, particle detectors, Belle II detector, ring imaging Cherenkov counters, RICH counters
Objavljeno v DKUM: 21.07.2017; Ogledov: 1271; Prenosov: 470
.pdf Celotno besedilo (1,57 MB)
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