Aidin Amirkhani
A5069326718- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Radiation Detection and Scintillator Technologies
- Muon and positron interactions and applications
- Radioactive Decay and Measurement Techniques
- Dark Matter and Cosmic Phenomena
- Nuclear Physics and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Atomic and Molecular Physics
- Rare-earth and actinide compounds
- X-ray Spectroscopy and Fluorescence Analysis
- Radio Frequency Integrated Circuit Design
- Black Holes and Theoretical Physics
- CCD and CMOS Imaging Sensors
- Antenna Design and Optimization
- Advanced NMR Techniques and Applications
- Energy Harvesting in Wireless Networks
- Metal Extraction and Bioleaching
- Radiation Effects in Electronics
- X-ray Diffraction in Crystallography
- Relativity and Gravitational Theory
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2017-2021
Politecnico di Milano
2017-2021
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2019
Sapienza University of Rome
2019
Istituto Nazionale di Fisica Nucleare
2019
A large area silicon drift detectors (SDDs) system and its readout electronics have been developed by the SIDDHARTA-2 Collaboration, aiming to perform high-precision light kaonic atoms x-ray spectroscopy for investigation of strong interaction in low-energy QCD regime. To these measurements, a linear energy response good resolution are mandatory requirements system, be preserved along whole DAQ (analog digital) chain; such task is made even harder experimental environment particles...
Novel, large-area silicon drift detectors (SDDs) have been developed to perform precision measurements of kaonic atom X-ray spectroscopy, for the study K ¯ N strong interaction in low-energy regime. These devices special geometries, field configurations and read-out electronics, resulting excellent performances terms linearity, stability energy resolution. In this work SDDs response region between 4000 eV 12,000 is reported, revealing a stable linear within 1 good
Kaonic atoms measure the antikaon-nucleus interaction at almost zero relative energy, allowing one to determine basic low-energy quantum chromodynamics (QCD) quantities, namely, antikaon-nucleon ( K ¯ N) scattering lengths. The latter are important for extracting sigma terms which built on symmetry breaking part of Hamiltonian, thereby providing a chiral and SU(3) symmetries breaking. After discussing their relations kaonic atoms, we describe most precise measurement in literature hydrogen,...
The antikaon-nucleon interaction close to threshold provides crucial information on the interplay between spontaneous and explicit chiral symmetry breaking in low-energy QCD. In this context, importance of kaonic deuterium x-ray spectroscopy has been well recognized, but no experimental results have yet obtained due difficulty measurement. To measure shift width 1s state with an accuracy 30 eV 75 eV, respectively, apparatus is under construction at Laboratori Nazionali di Frascati. A...
Abstract In this paper we report on the results of two analyses data taken with a dedicated VIP-Lead experiment at Gran Sasso National Laboratory INFN. We use measurements in an environment that is especially well screened from cosmic rays, metal target made “Roman lead” which characterised by low level intrinsic radioactivity. The lead to improvement, upper bounds Pauli Exclusion Principle violation for electrons, more than one (four) orders magnitude, when electron-atom interactions are...
collider with new experimental techniques, as fast and precise Silicon-Drift X-ray detectors.The measurement of kaonic deuterium will be realized in the near future by SIDDHARTA-2, a major upgrade SIDDHARTA.
The current work describes a method for dealing with an anomalous background observed in parallel to the signal of interest (X-rays or gammas) on spectroscopic silicon drift detector (SDD) arrays exposed large fluxes ionizing radiation. increment could not be explained by Monte Carlo simulation reproducing well single SDD cell response and containing realistic multicell array structure, neither measurements devices. After rejecting crosstalk hypothesis, asymmetry drift-time distribution...
This article presents the kaonic atom studies performed at INFN National Laboratory of Frascati (Laboratori Nazionali di dell’INFN, LNF-INFN) since opening this field research DA Φ NE collider in early 2000. Significant achievements have been obtained by Exotic Atom Research (DEAR) and Silicon Drift Detector for Hadronic Timing Applications (SIDDHARTA) experiments on hydrogen, which required development novel X-ray detectors. The 2019 installation new SIDDHARTA-2 experiment to measure...
The VIP-2 experiment aims to perform high precision tests of the Pauli Exclusion Principle for electrons. method consists in circulating a continuous current copper strip, searching X radiation emission due prohibited transition (from 2p level 1s when this is already occupied by two electrons). VIP set best limit on PEP violation probability electrons 1 2 β < 4.7 × 10 − 29 , goal upgraded (VIolation Principle-2) improve result orders magnitude at least. experimental apparatus and results...
The DAΦNE electron-positron collider of the Laboratori Nazionali di Frascati INFN has made available a unique quality low-energy negatively charged kaons "beam", which is being used to study kaon-nucleon/nuclei interactions by SIDDHARTA-2 experiment and AMADEUS Collaboration.The dynamics strong interaction processes in nonperturbative regime approached lattice calculations effective field theories (ChPT) are still lacking experimental results lowenergy regime, fundamental for their good...
The interaction of antikaons with nucleons and nuclei in the low-energy regime represents an active research field hadron physics still many important open questions. investigation light kaonic atoms, which one electron is replaced by a negatively charged kaon, unique tool to provide precise information on this interaction; energy shift broadening low-lying states such induced kaon-nucleus hadronic interaction, can be determined high precision from atomic X-ray spectroscopy, experimental...
Abstract The VIP experiment performed an accurate investigation of the Pauli Exclusion Principle for electrons. apparatus was installed in Gran Sasso Laboratories National Institute Nuclear Physic Italy, underground environment with extremely low cosmic background. aim to test electrons a copper target circulated by Direct Current (DC) current, searching X-rays emission due atomic transition forbidden exclusion principle, from L shell K when is already occupied two set upper limit on...
We present the design and characterization of a detection unit for simultaneous combined XRF XRD analysis powder mineralogical samples. Arrays 32 silicon microstrips are coupled to two 16-channel CUBE preamplifiers targeting an energy resolution below 200 eV at 6 keV with moderate cooling. The compact module will be mounted on goniometer inside suitcase-sized analyzer operated in mining sites.
Abstract The DAΦNE electron-positron collider of the Laboratori Nazionali di Frascati INFN is a worldwide unique low-energy kaon source and for this reason suitable physics like kaonic atoms kaon-nucleons/nuclei interaction studies. Kaonic are atomic systems where an electron replaced by negatively charged kaon, containing strange quark, which interacts in lowest orbits with nucleus also strong interaction. As result, their study offers opportunity to perform experiments equivalent...
Abstract The VIP collaboration is performing high precision tests of the Pauli Exclusion Principle for electrons in extremely low cosmic background environment Underground Gran Sasso Laboratories INFN (Italy). experimental technique consists introducing a DC current copper conductor, searching X-rays emission due to PEP-forbidden atomic transition from L shell K when already occupied by two electrons. set un upper limit on PEP violation probability <?CDATA $\frac{1}{2}{\beta }^{2}\lt...
The experimental studies of light kaonic atoms offer the unique opportunity to investigate kaon-nucleus interaction at threshold, performing experiments equivalent scattering vanishing relative energies without need an extrapolation.In this framework, SIDDHARTA-2 experiment is going perform first measurement deuterium 2p → 1s transition, which fundamental extract isospin-dependent antikaonnucleon lengths.The setup was installed on DAΦNE collider LNF-INFN in spring 2019 and presently...
This work is mainly focused on characterization and analysis of cross-talk a detection module for X-ray spectroscopy which developed the SIDDHARTA experiment. The experiment designed to investigate strong nuclear interactions using exotic atoms in field physics. Silicon Drift Detectors (SDDs) used this are arranged arrays 2×4 elements with total area 612 mm2. At final stage experiment, 48 SDD needed be utilized gantry structure perform nuclei, like kaonic deuterium. Each single unit...
The kaonic deuterium measurement at J-PARC and DAΦNE will provide a piece of information still missing to the antikaon-nucleon interaction close threshold, providing valuable answer one most fundamental problems in hadron physics today - yet unsolved puzzle how mass is generated. For this new X-ray detector system has been developed measure shift width 2p → 1s transition with precision 60 eV 140 eV, respectively.
The interaction of antikaons with nucleons and nuclei in the low-energy regime represents an active research field hadron physics still many important open questions. investigation light kaonic atoms is, this context, a unique tool to obtain precise information on interaction. energy shift broadening lowest-lying states such atoms, induced by kaon-nucleus strong interaction, can be determined high precision from atomic X-ray spectroscopy. This experimental method provides understand low at...
Applications of energy spectroscopy photons and electrons at high count rates often demand for highly pixelated detectors in order to reduce the rate per pixel. Nevertheless, increased number increases complexity readout electronics, requiring Data Acquisition systems (DAQ) able perform fast multi-channel analysis. In framework TRISTAN project search Sterile neutrino keV-scale, we present SFERA-TAC, a 16-channel Analog Pulse Processing integrated circuit Silicon Drift Detectors. SFERA-TAC...
This work is focused on the development of a 128-channel low-power ASIC for readout silicon microstrip detectors with high energy resolution and counting rate efficiency X-ray diffractometry. It expected that this would find wider application other detector solutions as well.Each channel composed by charge sensitive preamplifier, shaping amplifier, two twin discriminators photon within an window one detection very small signals, e.g. due to inter-strip sharing effect. The chip can...