M. Kajetanowicz
A5039309191- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Medical Imaging Techniques and Applications
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Quantum Chromodynamics and Particle Interactions
- Nuclear Physics and Applications
- Advanced Data Storage Technologies
- Nuclear physics research studies
- Radiation Therapy and Dosimetry
- Dark Matter and Cosmic Phenomena
- Advanced X-ray and CT Imaging
- Particle accelerators and beam dynamics
- Neutrino Physics Research
- Radiopharmaceutical Chemistry and Applications
- Analytical Chemistry and Sensors
- Photonic and Optical Devices
- Atomic and Molecular Physics
- Advancements in PLL and VCO Technologies
- Advancements in Semiconductor Devices and Circuit Design
- Particle Accelerators and Free-Electron Lasers
- Advanced Power Generation Technologies
- Radiation Effects in Electronics
- Superconducting Materials and Applications
Jagiellonian University
2011-2024
Theranostics (New Zealand)
2024
Institute of Physics
2006-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
2019
University of Florence
2019
Elsta Elektronika (Poland)
2011-2012
Brookhaven National Laboratory
2003
University of California, Santa Cruz
2002
Institute of Nuclear Physics, Polish Academy of Sciences
1989
Positronium is abundantly produced within the molecular voids of a patient’s body during positron emission tomography (PET). Its properties dynamically respond to submolecular architecture tissue and partial pressure oxygen. Current PET systems record only two annihilation photons cannot provide information about positronium lifetime. This study presents in vivo images lifetime human, for patient with glioblastoma brain tumor, by using dedicated Jagiellonian system enabling simultaneous...
The invariant-mass spectrum of $e^+ e^-$ pairs produced in $^{12}$C+$^{12}$C collisions at an incident energy 2 GeV per nucleon has been measured for the first time. pair production probabilities span over five orders magnitude from $\pi^0$-Dalitz to $\rho/\omega$ region. Dalitz decays $\pi^0$ and $\eta$ account all yield up 0.15 GeV/c$^2$, but only about 50% above this mass. A comparison with model calculations shows that excess is likely due baryon-resonance vector-meson decays. Transport...
This document describes the technical layout and expected performance of Straw Tube Tracker (STT), main tracking detector $\overline{P}$ ANDA target spectrometer. The STT encloses a Micro-Vertex-Detector (MVD) for inner is followed in beam direction by set GEM stations. tasks are measurement particle momentum from reconstructed trajectory specific energy loss identification. Dedicated simulations with full analysis studies certain proton-antiproton reactions, identified as being benchmark...
In this article it is presented an FPGA based $M$ulti-$V$oltage $T$hreshold (MVT) system which allows of sampling fast signals ($1-2$ ns rising and falling edge) in both voltage time domain. It possible to achieve a precision measurement $20$ ps RMS reconstruct charge signals, using simple approach, with deviation from real value smaller than 10$\%$. Utilization the differential inputs chip as comparators together implementation TDC inside allowed us compact multi-channel characterized by...
A novel approach to tomographic data processing has been developed and evaluated using the Jagiellonian PET (J-PET) scanner as an example. We propose a system in which there is no need for powerful, local facility, capable reconstruct images on fly. Instead we introduce Field Programmable Gate Array (FPGA) System-on-Chip (SoC) platform connected directly streams coming from scanner, can perform event building, filtering, coincidence search Region-Of-Response (ROR) reconstruction by...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> HADES is a running spectrometer installed at GSI, Germany. PANDA and CBM are planned detector systems for the new FAIR facility GSI. For these detectors, general-purpose trigger readout board with on-board DAQ functionality was developed. The original motivation this project implementation of 128-channel time to digital converter (TDC) resolution <formula formulatype="inline"><tex>$\sigma...
A high precision ( < 14 ps RMS time resolution) and channel density ∼ 256 channels) Time to Digital Converter (TDC) module (realized in FPGAs) with integrated DAQ is presented. The data transported over up 8 Gigabit-Ethernet or optical links 3 Gb/s. Slow-Control information the same links. It can be attached directly detector, which allows elimination of long cables crate systems. full TDCs are expected use approximately 30 W electrical power. size 20 cm by 23 cm. Power provided a...
In this contribution we present a new concept of the large acceptance detector systems based on organic scintillators which may allow for simultaneous diagnostic fraction human body. Novelty lies in employing blocks polymer instead crystals as detectors annihilation quanta, and using predominantly timing signals their amplitudes.
Particle identification by time-of-flight requires the simultaneous measurement of passing time and trajectory particles. It may be usefull that each tracking station measures both quantities, providing better timing accuracy redundancy independence from an external initial counter. In here we demonstrate a 5-gap RPC equipped with patterned electrodes coupled to charge-sensitive circuits, yielding 77 ps along position 38 μm.
We briefly present a design of new PET scanner based on strips polymer scintillators arranged in barrel constituting large acceptance detector. The solution proposed is the superior timing properties scintillators. position and time reaction gamma quanta detector material will be determined arrival light signals to edges scintillator strips.
The HADES experiment is a High Acceptance Di-Electron Spectrometer located at GSI in Darmstadt, Germany. Recently, its trigger and data acquisition system was upgraded. main goal to substantially increase the event rate capability by factor of up 20 reach 100 kHz light heavy ion reaction systems. total written storage about 400 MByte/s peak.
We present imaging results of needle-like and planar22Na sources obtained with a prototype high-acceptance small-animal positron emission tomograph based on resistive plate chambers (RPC-PET). The maximum-likelihood expectation-maximization (MLEM) reconstruction the acquired data yielded an excellent stable resolution 0.4 mm FWHM.
The design and tests of front-end electronics for straw tube trackers in the ANDA experiment at FAIR are presented. challenges electronics, comprising operation high counting rate up to 1 MHz per tube, discussed proposed architecture a switched gain charge sensitive preamplifier (CSP), pole-zero cancellation circuit (PZC), second order variable peaking time shaper, trimming ion tail circuit, baseline holder (BLH), is described. provides an analogue output discriminator with LVDS differential...
Positronium, an unstable atom consisting of electron and a positron, is abundantly produced within the molecular voids patient's body during positron emission tomography (PET) diagnosis. Its properties, such as its average lifetime between formation annihilation into photons, dynamically respond to submolecular architecture tissue partial pressure oxygen molecules. However, diagnostic information that positronium may deliver about early alterations remains unavailable in clinics with...
The HADES collaboration uses the e + − production as a probe of resonance matter produced in collisions at incident energies 1-3.5 GeV/nucleon GSI. Elementary reactions provide useful references for these studies and give information on Dalitz decays (R→Ne ). Such processes are sensitive to structure time-like electromagnetic baryon transitions kinematic range where (off-shell) vector mesons play crucial role. Results obtained proton-proton commissioning pion-beam experiment reported...
The design of straw tube detector modules developed for the PANDA Forward Tracker is presented. One module consists 32 straws with 10 mm diameter, arranged in two staggered layers, and has a very low material budget only 8.8⋅10−4X0. overpressure working gas mixture 1 bar makes self-supporting enables use lightweight compact support frames. Detection planes consist mounted closely, without gaps, next to each other on frame. A can be dismounted from frame need remove neighboring modules,...
HADES is a running spectrometer installed at GSI,Germany. PANDA and CBM are planned detector systems for the new FAIR facility GSI. For these detectors, general-purpose trigger readout board (TRB) with on-board DAQ functionality was developed. Data slow control done via an Etrax processor Linux 100 Mbit/s Ethernet interface. The original motivation application of hardware implementation 128-channel Time to Digital Converter (TDC) electronics based on HPTDC from CERN (we achieve sigma = 40 ps...