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Search Results: 1 - 10 of 200484 matches for " P. Salabura "
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Dielectron production in 12C+12C collisions at 2 AGeV with HADES
Piotr Salabura
Physics , 2006, DOI: 10.1103/PhysRevLett.98.052302
Abstract: The invariant-mass spectrum of $e^+ e^-$ pairs produced in $^{12}$C+$^{12}$C collisions at an incident energy of 2 GeV per nucleon has been measured for the first time. The measured pair production probabilities span over five orders of magnitude from the $\pi^0$-Dalitz to the $\rho/\omega$ invariant-mass region. Dalitz decays of $\pi^0$ and $\eta$ account for all the yield up to 0.15 GeV/c$^2$, but for only about 50% above this mass. A comparison with model calculations shows that the excess pair yield is likely due to baryon-resonance and vector-meson decays. Transport calculations based on vacuum spectral functions fail, however, to describe the entire mass region.
Novel detector systems for the Positron Emission Tomography
P. Moskal,P. Salabura,M. Silarski,J. Smyrski,J. Zdebik,M. Zieliński
Physics , 2013,
Abstract: In this contribution we describe a novel solution for the construction of Positron Emission Tomograph. We present the device allowing for determination of the impact position as well as time and deph of interaction of the annihilation gamma quanta. The device is comprised of scintillation chamber consisting of organic scintillators surrounding the body of the patient. We discuss two possible solutions: (i) the tomograph built out of scintillator strips, and (ii) the tomograph built out of the scintillator plates. The application of the fast scintillators will enable to take advantage of the difference between time of the registration of the annihilation quanta. The invented method will permit to use a thick layers of detector material with the possibility of measuring the depth of the gamma quantum interaction (DOI) and the determination of their time of flight (TOF), and will allow for increasing the size of the diagnostic chamber without a significant increase of costs. The method is a subject of two patent applications which are based on the techniques used in the particle physics experiments.
Design of the Pluto Event Generator
I. Froehlich,T. Galatyuk,R. Holzmann,J. Markert,B. Ramstein,P. Salabura,J. Stroth
Physics , 2009, DOI: 10.1088/1742-6596/219/3/032039
Abstract: We present the design of the simulation package Pluto, aimed at the study of hadronic interactions at SIS and FAIR energies. Its main mission is to offer a modular framework with an object-oriented structure, thereby making additions such as new particles, decays of resonances, new models up to modules for entire changes easily applicable. Overall consistency is ensured by a plugin- and distribution manager. Particular features are the support of a modular structure for physics process descriptions, and the possibility to access the particle stream for on-line modifications. Additional configuration and self-made classes can be attached by the user without re-compiling the package, which makes Pluto extremely configurable.
The TRB for HADES and FAIR experiments at GSI
W. Krzemien,I. Frohlich,M. Kajetanowicz,K. Korcyl,J. Michel,M. Palka,P. Salabura,C. Schrader,P. Skott,H. Strobele,J. Stroth,A. Tarantola,M. Traxler,R. Trebacz
Physics , 2008,
Abstract: The TRB hardware module is a multi-purpose Trigger and Readout Board with on-board DAQ functionality developed for the upgrade of the HADES experiment. It contains a single computer chip (Etrax) running Linux as a well as a 100 Mbit/s Ethernet interface. It has been orginally designed to work as a 128-channel Time to Digital Converter based on the HPTDC chip from CERN. The new version contains a 2 Gbit/s optical link and an interface connector (15 Gbit/s) in order to realize an add-on card concept which makes the hardware very flexible. Moreover, an FPGA chip (Xilinx, Virtex 4 LX 40) and a TigerSharc DSP provide new computing resources which can be used to run on-line analysis algorithms. The TRB is proposed as a prototype for new modules for the planned detector systems PANDA and CBM at the future FAIR facility at GSI-Darmstadt.
Acceptance and resolution simulation studies for the dielectron spectrometer HADES at GSI
R. Schicker,A. Brenschede,K. Garrow,H. Schoen,A. Balanda,H. Bokemeyer,J. Friese,W. Karig,P. Kienle,W. Koenig,W. Kuehn,F. Lefevre,V. Metag,G. Roche,P. Salabura,A. Schroeter,J. Stroth,H. Tsertos
Physics , 1996, DOI: 10.1016/0168-9002(96)00732-2
Abstract: Design studies for a second generation Dilepton Spectrometer to be built at the SIS accelerator of GSI are presented. The basic design parameters of this system are specified and the different detector components for charged particle tracking and for lepton identification are described. The geometrical acceptance for lepton pairs is given. Results on single track momentum resolution and on lepton pair mass resolution are reported.
Electromagnetic Calorimeter for HADES
W. Czyzycki,E. Epple,L. Fabbietti,M. Golubeva,F. Guber,A. Ivashkin,M. Kajetanowicz,A. Krasa,F. Krizek,A. Kugler,K. Lapidus,E. Lisowski,J. Pietraszko,A. Reshetin,P. Salabura,Y. Sobolev,J. Stanislav,P. Tlusty,T. Torrieri,M. Traxler
Physics , 2011,
Abstract: We propose to build the Electromagnetic calorimeter for the HADES di-lepton spectrometer. It will enable to measure the data on neutral meson production from nucleus-nucleus collisions, which are essential for interpretation of dilepton data, but are unknown in the energy range of planned experiments (2-10 GeV per nucleon). The calorimeter will improve the electron-hadron separation, and will be used for detection of photons from strange resonances in elementary and HI reactions. Detailed description of the detector layout, the support structure, the electronic readout and its performance studied via Monte Carlo simulations and series of dedicated test experiments is presented. The device will cover the total area of about 8 m^2 at polar angles between 12 and 45 degrees with almost full azimuthal coverage. The photon and electron energy resolution achieved in test experiments amounts to 5-6%/sqrt(E[GeV]) which is sufficient for the eta meson reconstruction with S/B ratio of 0.4% in Ni+Ni collisions at 8 AGeV. A purity of the identified leptons after the hadron rejection, resulting from simulations based on the test measurements, is better than 80% at momenta above 500 MeV/c, where time-of-flight cannot be used.
A versatile method for simulating pp -> ppe+e- and dp -> pne+e-p_spec reactions
I. Froehlich,F. Dohrmann,T. Galatyuk,R. Holzmann,P. K. Kaehlitz,B. Kaempfer,E. Moriniere,Y. C. Pachmayer,B. Ramstein,P. Salabura,J. Stroth,R. Trebacz,J. Van de Wiele,J. Wuestenfeld
Physics , 2009, DOI: 10.1140/epja/i2010-11012-3
Abstract: We have developed a versatile software package for the simulation of di-electron production in $pp$ and $dp$ collisions at SIS energies. Particular attention has been paid to incorporate different descriptions of the Dalitz decay $\Delta \to N e^+e^-$ via a common interface. In addition, suitable parameterizations for the virtual bremsstrahlung process $NN \to NN e^+e^-$ based on one-boson exchange models have been implemented. Such simulation tools with high flexibility of the framework are important for the interpretation of the di-electron data taken with the HADES spectrometer and the design of forthcoming experiments.
Pluto: A Monte Carlo Simulation Tool for Hadronic Physics
I. Froehlich,L. Cazon Boado,T. Galatyuk,V. Hejny,R. Holzmann,M. Kagarlis,W. Kuehn,J. G. Messchendorp,V. Metag,M. -A. Pleier,W. Przygoda,B. Ramstein,J. Ritman,P. Salabura,J. Stroth,M. Sudol
Physics , 2007,
Abstract: Pluto is a Monte-Carlo event generator designed for hadronic interactions from Pion production threshold to intermediate energies of a few GeV per nucleon, as well as for studies of heavy ion reactions. This report gives an overview of the design of the package, the included models and the user interface.
System Response Kernel Calculation for List-mode Reconstruction in Strip PET Detector
P. Bia?as,J. Kowal,A. Strzelecki,T. Bednarski,E. Czerwiński,?. Kap?on,A. Kochanowski,G. Korcyl,P. Kowalski,T. Kozik,W. Krzemień,M. Molenda,P. Moskal,Sz. Nied?wiecki,M. Pa?ka,M. Pawlik,L. Raczyński,Z. Rudy,P. Salabura,N. G. Sharma,M. Silarski,A. S?omski,J. Smyrski,W. Wi?licki,M. Zieliński
Physics , 2013, DOI: 10.5506/APhysPolBSupp.6.1027
Abstract: Reconstruction of the image in Positron Emission Tomographs (PET) requires the knowledge of the system response kernel which describes the contribution of each pixel (voxel) to each tube of response (TOR). This is especially important in list-mode reconstruction systems, where an efficient analytical approximation of such function is required. In this contribution, we present a derivation of the system response kernel for a novel 2D strip PET.
Application of Compressive Sensing Theory for the Reconstruction of Signals in Plastic Scintillators
L. Raczyński,P. Kowalski,T. Bednarski,P. Bia?as,E. Czerwiński,?. Kap?on,A. Kochanowski,G. Korcyl,J. Kowal,T. Kozik,W. Krzemień,M. Molenda,P. Moskal,Sz. Nied?wiecki,M. Pa?ka,M. Pawlik,Z. Rudy,P. Salabura,N. G. Sharma,M. Silarski,A. S?omski,J. Smyrski,A. Strzelecki,W. Wi?licki,M. Zieliński
Physics , 2013, DOI: 10.5506/APhysPolBSupp.6.1121
Abstract: Compressive Sensing theory says that it is possible to reconstruct a measured signal if an enough sparse representation of this signal exists in comparison to the number of random measurements. This theory was applied to reconstruct signals from measurements of plastic scintillators. Sparse representation of obtained signals was found using SVD transform.
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