A5101682518- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Advanced Data Storage Technologies
- Radiation Detection and Scintillator Technologies
- Distributed and Parallel Computing Systems
- Particle Accelerators and Free-Electron Lasers
- Parallel Computing and Optimization Techniques
- Advancements in PLL and VCO Technologies
- Astronomical Observations and Instrumentation
- Superconducting Materials and Applications
- Interconnection Networks and Systems
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- CCD and CMOS Imaging Sensors
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Algorithms and Data Compression
- Radiation Effects in Electronics
- Distributed Sensor Networks and Detection Algorithms
- Adaptive optics and wavefront sensing
- Astronomy and Astrophysical Research
- Nuclear Physics and Applications
- Experimental Learning in Engineering
Technical University of Munich
2015-2024
University of Aveiro
2018-2023
A. Alikhanyan National Laboratory
2023
Universitat de Barcelona
2022
University of Turin
2014-2020
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2014-2020
University of Bonn
2019
Joint Institute for Nuclear Research
2018
Charles University
2018
European Southern Observatory
2014
First measurements of azimuthal asymmetries in hadron-pair production deep-inelastic scattering muons on transversely polarised ^6LiD (deuteron) and NH_3 (proton) targets are presented. The data were taken the years 2002-2004 2007 with COMPASS spectrometer using a muon beam 160 GeV/c at CERN SPS. provide access to transversity distribution functions, without involving Collins effect as single hadron production. sizeable measured NH_ target indicate non-vanishing u-quark two-hadron...
A measurement of the azimuthal asymmetry in dihadron production deep-inelastic scattering muons on transversely polarised proton (NH$_{3}$) targets are presented. They provide independent access to transversity distribution functions through Collins single hadron production. The data were taken year $2010$ with COMPASS spectrometer using a $160\,\mbox{GeV}/c$ muon beam CERN SPS, increasing by factor about three available statistics previously published $2007$. measured sizeable is good...
The COMPASS collaboration at CERN has measured diffractive dissociation of 190 GeV/$c$ pions into the $\pi^-\pi^-\pi^+$ final state using a stationary hydrogen target. A partial-wave analysis (PWA) was performed in bins $3\pi$ mass and four-momentum transfer isobar model so far largest PWA consisting 88 waves. narrow $J^{PC} = 1^{++}$ signal is observed $f_0(980)\,\pi$ channel. We present resonance-model study subset spin-density matrix selecting states with 2^{++}$ $4^{++}$ decaying...
This contribution addresses the need for reliable and efficient data storage in high-energy physics experiment called AMBER. The generates sustained rates of up to 10 GB/s, requiring optimization storage. study investigates single-disk performance, including random sequential disk operations, highlighting impact parallel access geometry. A comparison with SSD drives reveals important differences. Various RAID configurations are assessed, considering their reliability, rates, capacity....
We report on the first measurement of exclusive single-photon muoproduction proton by COMPASS using 160 GeV/c polarised μ+ and μ− beams CERN SPS impinging a liquid hydrogen target. determine dependence average measured cross sections for deeply virtual Compton scattering squared four-momentum transfer t from initial to final proton. The slope B t-dependence is fitted with single exponential function, which yields B=(4.3±0.6stat|sys−0.3+0.1)(GeV/c)−2. This result can be converted into...
We study the spin-exotic $J^{PC} = 1^{-+}$ amplitude in single-diffractive dissociation of 190 GeV$/c$ pions into $\pi^-\pi^-\pi^+$ using a hydrogen target and confirm $\pi_1(1600) \to \rho(770) \pi$ amplitude, which interferes with nonresonant $1^{-+}$ amplitude. demonstrate that conflicting conclusions from previous studies on these amplitudes can be attributed to different analysis models treatment dependence squared four-momentum transfer we thus reconcile their experimental findings....
The production of vector mesons in deep inelastic scattering is an interesting yet scarsely explored channel to study the transverse spin structure nucleon and related phenomena. COMPASS collaboration has performed first measurement Collins Sivers asymmetries for inclusively produced $\rho^0$ mesons. analysis based on data set collected $2010$ using a $160\,\,\rm{GeV}/c$ $\mu^+$ beam impinging transversely polarized $\rm{NH}_3$ target. $\rho^{0}$ are selected from oppositely charged hadron...
Single hadron azimuthal asymmetries of positive and negative hadrons produced in muon semi-inclusive deep inelastic scattering off longitudinally polarised deuterons are determined using the 2006 COMPASS data also combined all deuteron data. For each charge, dependence asymmetry on angle $\phi$ is obtained by means a five-parameter fitting function that besides $\phi$-independent term includes four modulations predicted theory: $\sin\phi$, $\sin 2 \phi$, 3\phi$ $\cos\phi$. The amplitudes...
We present a new amplitude analysis of the ηπ D-wave in reaction π−p→ηπ−p measured by COMPASS. Employing an analytical model based on principles relativistic S-matrix, we find two resonances that can be identified with a2(1320) and excited a2′(1700), perform comprehensive their pole positions. For mass width a2 M=(1307±1±6) MeV Γ=(112±1±8) MeV, for state a2′ obtain M=(1720±10±60) Γ=(280±10±70) respectively.
The modern market offers low cost high performance FPGA integrated circuits equipped with dozens of multi gigabit serial links making them ideal devices for data transmission and sorting applications. Therefore we have designed the new DAQ system that would perform detector readout event building in a custom made based hardware. software part will provide control monitoring function. Currently, prototypes card are being tested is prepared tests real
In this paper, we present the field programmable gate arrays (FPGA)-based framework intelligent FPGA data acquisition (IFDAQ), which is used for development of DAQ systems detectors in high-energy physics. The supports Xilinx and provides a collection IP cores written very high speed integrated circuit hardware description language, use common interconnect interface. core library offers functionality required full chain. consists Serializer/Deserializer (SERDES)-based time-to-digital...
COMPASS is a fixed-target experiment at the SPS CERN dedicated to study of hadron structure and spectroscopy. Since 2014, hardware event builder consisting nine custom designed FPGA-cards replaced previous online computers increasing compactness scalability DAQ. By buffering data, system exploits spill averages maximum on-spill data rate over whole cycle. From 2016, crosspoint switch connecting all involved high-speed links shall provide fully programmable topology thus simplifies...
New results are presented on a high-statistics measurement of Collins and Sivers asymmetries charged hadrons produced in deep inelastic scattering muons transversely polarized ^{6}LiD target. The data were taken 2022 with the COMPASS spectrometer using 160 GeV muon beam at CERN, statistically balancing existing proton targets. first from about two-thirds new have total uncertainties smaller by up to factor three compared previous deuteron measurements. Using all results, both transversity...
A set of measurements azimuthal asymmetries in the production pairs identified hadrons deep-inelastic scattering muons on transversely polarised 6LiD (deuteron) and NH3 (proton) targets is presented. All available data collected years 2003–2004 2007/2010 with COMPASS spectrometer using a muon beam 160GeV/c at CERN SPS were analysed. The provide access to transversity distribution functions via fragmentation function that principle may be independently obtained from e+e− annihilation data....
This paper presents development and recent status of the new data acquisiton system COMPASS experiment at CERN with up to 50 kHz trigger rate 36 kB average event size during 10 second period beam followed by approximately 40 without beam. In original DAQ, building is performed software deployed on switched computer network, moreover readout based deprecated PCI technology; replaces network a custom FPGA-based hardware. The cards are introduced advantages FPGA technology for DAQ related tasks...
This paper presents the current data acquisition system (DAQ) of COMPASS experiment at CERN and discusses development a new DAQ. The aim DAQ is to substitute software event building by structure composed special FPGA cards that will do building. part robust multinode with high emphasis on reliability. It based state machines implemented in C++ usage QT framework, DIM library, IPBus technology. A prototype has been developed tested. fulfills given requirements.
The COMPASS experiment (COmpact Muon Proton Apparatus for Structure and Spectroscopy) is a fixed target located at the CERN Super Synchrotron. physics program focused on study of hadron structure spectroscopy with high intensity muon beams, up to 160 GeV/c muons 190 hadrons respectively. To allow tracking charged particles very low as well momentum, comprises two magnetic spectrometer stages extending total length 60 m. From data acquisition point view, about 200000 analog detector channels...
The GRAVITY Instrument Software (INS) is based on the common VLT Environment. In addition to basic Control (ICS) which handles Motors, Shutters, Lamps, etc., it also includes three detector subsystems, several special devices, field bus and various real time algorithms. latter are implemented using ESO TAC (Tools for Advanced Control) run at a frequency of up 4 kHz. total, instrument has more than 100 ICS devices runs five workstations seven vxWorks LCUs.
At the COMPASS experiment at CERN's SPS many physics channels containing neutral particles are studied. These identified by two electromagnetic calorimeters covering different regions of transverse momentum. For certain main signature is described these requiring a calorimetric trigger system. The method here based on existing front end electronics and uses digital pulse shape analysis techniques. With this approach flexible system was implemented. Because no new hardware had to be produced,...
On March 25th 2019, the Belle II detector recorded first collisions delivered by SuperKEKB accelerator. This marked beginning of physics run with vertex detector. The was aligned initially cosmic ray tracks without magnetic field simultaneously drift chamber. alignment method is based on Millepede and General Broken Lines track model includes also muon system or primary position alignment. To control weak modes, we employ sensitive validation tools various samples can be used as input, from...
We present a new data acquisition system for the COMPASS++/AMBER experiment designed as further development of intelligent FPGA-based framework. The is to have maximum throughput 5 GB/s. provide free-running continuous readout, which allows us implement sophisticated filtering by delaying decision until hardware filter and high-level trigger stage processes data. includes front-end cards, fully digital filter, multiplexers, timeslice builder, farm. selection assembly require time structure...