Poziv na IEEE predavanje: Monolithic active pixel particle detectors used in HEP experiments at the CERN LHC

Zajednički odjel za elektroničke elemente / poluvodičke integrirane sklopove (ED15/SSC37) i Odjel za električne krugove i sustave (CAS04) Hrvatske sekcije IEEE pozivaju Vas na predavanje:                          

Monolithic active pixel particle detectors used in HEP experiments at the CERN LHC

koje će održati Dominik Dobrijević, mag. ing. iz CERN-a. Predavanje će se održati u ponedjeljak 2. prosinca 2024. s početkom u 14 sati u dvorani D346 na FER-u.

Predviđeno trajanje predavanje s raspravom je 45 minuta. Predavanje je otvoreno za sve zainteresirane, a posebno pozivamo studente. Više o predavaču i predavanju možete pročitati u opširnijem sadržaju obavijesti.

Talk Summary: High energy physics is a discipline focused on investigating the fundamental components of matter and their interactions. Particle accelerators play a pivotal role in this field by producing high speed collisions involving charged particles. The energy involved in these collisions is directly converted into changes of momentum, release of radiation, and production of new particles. Measuring the mass and energy of these newly generated particles provides an insight into their fundamental properties. This is done with the help of particle detectors, devices which are able to visualize the tracks of passing particles, allowing the observer to record and analyse their interactions. Particle detectors have evolved from gas chambers to silicon microstrips, culminating with the currently state of the art active pixel detectors. All of these detectors are based on the ionising properties of the high energy particles they track. Active pixel particle detectors offer superior spatial and timing resolution when compared to their predecessors, at a cost of added system complexity. Such detectors must be designed to withstand ever harsher radiation environments, demanded by large HEP experiments seeking to explore new physics.

This talk will aim to introduce the concept of Monolithic active pixel detectors (MAPS) in the context of the HEP environment. They will be compared to the more standard hybrid approach currently deployed in most experiments within the LHC at CERN, discussing the benefits and drawback of either approach, as well as elaborating the design challenges faced. Two concrete examples of MAPS will be presented, the MiniMALTA3 and the MOSAIX.

MiniMALTA3 is the newest small-scale prototype using the MALTA asynchronous matrix. this detector is fabricated in a standard 180nm CMOS technology, offering on-chip synchronization of particle hits with a sub-nanosecond timing resolution. The MALTA development aims deployment in harsh radiation environments, with targeted fluence levels previously reserved only for hybrid pixel detectors.

MOSAIX is a wafer scale monolithic stitched active pixel detector fabricated in a 65nm CMOS technology. It is a part of the ALICE ITS3 development line, targeting deployment in the three innermost layers in the ALICE detector, to be installed during the LHC long shutdown 3. It consists of 144 pixel matrices which can be independently powered, controlled or read out. The 26.6cm long detector will be thinned down to 50 um and bent in order to form a cylindrical layer.

Details regarding architecture, assembly, testing, and the overall development of such detectors will be presented during this talk.

Biografija: Dominik Dobrijević rod̄en je u Zagrebu, u Hrvatskoj, 30.06.1995. Osnovnu i srednju školu završava u rodnom gradu, a potom upisuje studij elektrotehnike i informacijske tehnologije na Fakultetu Elektrotehnike i računarstva Sveučilišta u Zagrebu. Tijekom studija bavi se predmetima na području poluvodičke tehnologije, mikroelektronike, analognih i digitalnih integriranih sklopova, te diskretnih RF pojačala. Magistrirao je 2020. godine na temu povećanja snage i korisnosti u radio-frekvencijskim pojačalima snage. Nakon završetka studija, zapošljava se kao doktorand u Europskoj organizaciji za nuklearna istraživanja (CERN), gdje se bavi projektiranjem naprednih monolitskih piksel detektora, uz naglasak na asinkrono-sinkrona sučelja, te sklopovlje za iščitavanje velike brzine rada. Tijekom doktorata sudjeluje na tečajevima stručnog usavršavanja na području mikroelektronike. Autor je i koautor brojnih radova na temu monolitskih piksel detektora otpornih na zračenje, te aktivno sudjeluje na med̄unarodnim konferencijama.