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24.-25. 10. 2018. Workshop on silicon photomultipliers and on dosimetry techniques in radiotherapy

Speakers: Prof. Massimo Caccia, Dr. Romualdo Santoro, and Samuela Lomazzi, Università degli Studi dell’Insubria
Location: On 24.10. Wing 1 lecture room (Supek) at 10 am, and on 25.10. Wing 3 lecture room at 3 pm.

Wed 24.10.
Introduction to Silicon Photomultipliers, M. Caccia
Massimo Caccia giving an introductory lecture at the RBI.
AbstractPart 1Part 2

Demonstration of SiPM start kit by CAEN s.p.a.
SP5600AN Educational Kit - Premium Version at CAEN web page

Thu 25.10.
Fibre sensors for in vivo dosimetry during radiotherapy, S. Lomazzi
Samuela Lomazzi giving presentation at the RBI.

Silicon Photomultiplier based dual-readout fibre calorimeter: firsts results and the pathway beyond the proof-of-concept, R. Santoro
Romualdo Santoro giving presentation at the RBI.

11. 10. 2018. Prime Minister of Croatia, Andrej Plenković, visited our premises.

Prime Minister Andrej Plenković visits RBI microbeam line.

Visiting scientists Ms. Jennifer Ott from Helsinki Institute of Physics, PM Andrej Plenković, Dr. Matti Kalliokoski from RBI PaRaDeSEC-project, and professor Milko Jakšić RBI/Croatian Academy of Science.

1.-2. 10. 2018. Meeting - Review of Reporting period 2

Location: RBI
Participants: RBI and project staff; EC project officers; Nora Brambilla, EC external evaluator

4. 9. 2018. Seminar presentation - Development of Novel Semiconductor Detectors In Xiangtan University

Speaker: Prof. Zheng Li, Xiangtan Technical University (XTU)
Location: Wing 1 lecture room (Supek), RBI
Participants: RBI and project staff

Development of novel large area Si drift detectors (SDD) and 3D-Trench-Electrode detectors have been carried out in Xiangtan University. These detectors are applied for X-ray and particle detection in the field of high energy physics, photon science, and space applications. Large area (600 mm2 and 314 mm2) SDD detectors have simulated, designed in Xiangtan University, and been fabricated in its new Class-100 cleanroom high resistivity Si detector processing facility. Simulations on the the new 3D-Trench-Electrode detectors have been carried out, and results have shown great radiation hardness as compared to convention 2D planar detectors. Leakage current and capacitance measurements have shown good results. Laser scan tests on the new 3D-Trench-Electrode detectors have shown good sensitivity and good pixel separation.

RBI-XTU-HIP X-ray drift detector mask design
RBI-XTU drift detector mask design.


27. 2. 2018. Seminar presentation - The basics of Geant4 and possible applications

Speaker: Dr. Matti Kalliokoski, Ruđer Bošković Institute
Location: Van de Graaff seminar room, RBI
Participants: RBI and project staff

Geant4 is a C++ based simulation toolkit that is used widely in design and analysis of high energy physics experiments, in space and radiation applications, and in medical physics. It can be used to simulate the passage of particles through matter. Geant4 physics processes describe electromagnetic and nuclear interactions of particles with matter, at energies from eV to TeV. In this seminar presentation I will briefly go through the basics of Geant4 toolkit, and show some applications from various fields from accelerator physics to space environment.

Planetary gearbox under neutron irradiation.

Geant4 simulation of a gearbox irradiated with neutrons.

26. 1. 2017. Seminar presentation - Alpha-screening of contaminated curved objects with flexible silicon

Speaker: Dr. Christian Schuster, University of York
Location: RBI
Participants: RBI and project staff

The detection of alpha radiation in the field can be challenging due to their short range, which is typically only some centimeters in air. This problem is exacerbated inside contaminated pipeline systems in the nuclear industry: there is currently no low cost solution available for measuring low levels of alpha-contamination, like Pu-239, inside pipes, because cutting a long pipework into segments is expensive and, therefore, incompatible for the inspection.

While previous methods mainly focused on indirect techniques, I will propose a novel approach based on a flexible sheet of 50 µm thin crystalline silicon. Following established fabrication steps of pn-junction diodes, we observe a very clear response to 5 MeV alpha-particles using a bespoke amplifier circuit. As a flexible detector offers 360-degree equidistant surface coverage and is able to adapt to the curvature of a given pipeline, I will show that our prototype device stands out as a low-cost and efficient solution for nuclear decommissioning.

Even if the sensor is aimed at the specific problem of assessing radioactive contamination in narrow pipe work, it can generally be adapted to a curved surface, such as barrels for contaminated waste. In my talk, I would like to discuss how it can also address requirements of nuclear and particle physics experiments.

Crystalline silicon wafers become flexible at ca. 70 µm thickness.

Crystalline silicon wafers become flexible at ca. 70 µm thickness. Accordingly, they can be bent to be used for screening the inner surface of a 2” diameter pipe for alpha-contamination and be mounted on an elastic inspection gauge.

2. 12. 2016. Meeting - Review of Reporting period 1

Location: RBI
Participants: RBI and project staff; Monica Hoek, EC project officer; Nora Brambilla, EC external evaluator

14. 9. 2015. Kick-off event of the project

Location: RBI