Danilova, I. B.

Davidkova, M.

Kushpil, S.

Electronic archive of Tomsk Polytechnic University

«Физико-технические проблемы в науке, промышленности и медицине. Российский и международный опыт подготовки кадров» Секция 2.  Радиационные технологии в промышленности и медицине  50  APPLICATION OF ALPIDE PIXEL DETECTOR FOR HEAVY-ION NUCLEAR EXPERIMENT AND ION THERAPY I.B. Danilova1, S. Kushpil2, M. Davidkova2 1National Research Tomsk Polytechnic University, Russia, Tomsk, Lenin Avenue, 30, 634050 2Nuclear Physics Institute of the Czech Academy of Sciences, Husinec 130, 25068 Rez, Czech Republic E-mail: irisna2809@gmail.com  The ALICE Pixel Detector (ALPIDE) is the Monolithic Active Pixel Sensor (MAPS) for the upgrade of the Inner Tracking System (ITS) of the ALICE experiment at CERN. The ALPIDE sensor is based on the TowerJazz technology, which uses a several metal layers which in combination with a small size of pixel implements high density and low power digital circuits. A single 25 µm thick sensor measures 15 mm × 30 mm and contains half a million pixels distributed in 512 rows and 1024 columns. Each pixel of the ALPIDE has an analog front-end circuit for signal amplification, hit discrimination, and a 3 hit buffer. The detection efficiency of the sensors is higher than 99%, fake-hit rate is orders of magnitude lower than the required 10-6 pixel-1 event-1, and spatial resolution is within the required 5µm [1]. Radiation therapy is one of the most effective ways to fight cancer. In order to successfully irradiate tumour within target volume and minimize the damage of healthy tissue, there is a need to control the dose delivery. Today, irradiation is carried out using photons or charged particles (for example, protons). Protons have the Bragg peak at the end of their trajectory, where they lose most of their energy. Therefore, the absorbed dose for healthy tissues after irradiation with protons is less than after photons. For the accurate determination of the Bragg peak position within a tumour volume, one needs to know the stopping power of organs and tissues of patients when the planning of proton radiation therapy [2]. ALPIDE has perfect position resolution and radiation tolerance allowing precise positioning of a particle beam in hadron therapy [3]. The purpose of the work was to study the characteristics of the ALPIDE pixel detector. The work describes an operational principle of the ALPIDE sensor, compares the beam test data taken at the Proton Synchrotron at CERN. We also present laboratory measurements of Fake Hite Rate of the selected ALPIDE chips for Outer Barrel of new ITS. The results were compared with ITS ALICE requests. REFERENCES 1. Kushpil, S (Rez, Nucl. Phys. Inst.) Characterization of ALPIDE Monolithic Active Pixel Sensor for the ALICE Inner Tracking System Upgrade Using the PS Facility at CERN. – 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC 2017), Atlanta, Georgia, USA, 21 - 28 Oct 2017, issue number 8532940 2. H. Paganetti Range uncertainties in proton therapy and the role of MC simulations. – Phys. Med. Biol., 2012, issue number 99-117. 3. Monika Varga-Kofarago (on Behalf of the Bergen pCT Collaboration) Medical Applications of the ALPIDE Detector. – Universe 2019, 5, 128; doi:10.3390/universe5050128.     

Application of ALPIDE pixel detector for heavy-ion nuclear experiment and ion therapy

http://earchive.tpu.ru/bitstream/11683/63752/1/conference_tpu-2020-C49_V2_p50.pdf

Application of ALPIDE pixel detector for heavy-ion nuclear experiment and ion therapy

Abstract

Similar works

Full text

Available Versions

Electronic archive of Tomsk Polytechnic University