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001-es BibID:	BIBFORM086134
035-os BibID:	(WoS)000454236100008 (Scopus)85056178968
Első szerző:	Aidala, C. A.
Cím:	Design and Beam Test Results for the sPHENIX Electromagnetic and Hadronic Calorimeter Prototypes / C. A. Aidala, V. Bailey, S. Beckman, R. Belmont, C. Biggs, J. Blackburn, S. Boose, M. Chiu, M. Connors, E. Desmond, A. Franz, J. S. Haggerty, X. He, M. M. Higdon, J. Huang, K. Kauder, E. Kistenev, J. LaBounty, J. G. Lajoie, M. Lenz, W. Lenz, S. Li, V. R. Loggins, E. J. Mannel, T. Majoros, M. P. McCumber, J. L. Nagle, M. Phipps, C. Pinkenburg, S. Polizzo, C. Pontieri, M. L. Purschke, J. Putschke, M. Sarsour, T. Rinn, R. Ruggiero, A. Sen, A. M. Sickles, M. J. Skoby, J. Smiga, P. Sobel, P. W. Stankus, S. Stoll, A. Sukhanov, E. Thorsland, F. Toldo, R. S. Towell, B. Ujvari, S. Vazquez-Carson, C. L. Woody
Dátum:	2018
ISSN:	0018-9499
Megjegyzések:	The super Pioneering High Energy Nuclear Interaction eXperiment (sPHENIX) at the Relativistic Heavy Ion Collider will perform high-precision measurements of jets and heavy flavor observables for a wide selection of nuclear collision systems, elucidating the microscopic nature of strongly interacting matter ranging from nucleons to the strongly coupled quark-gluon plasma. A prototype of the sPHENIX calorimeter system was tested at the Fermilab Test Beam Facility as experiment T-1044 in the spring of 2016. The electromagnetic calorimeter (EMCal) prototype is composed of scintillating fibers embedded in a mixture of tungsten powder and epoxy. The hadronic calorimeter (HCal) prototype is composed of tilted steel plates alternating with the plastic scintillator. Results of the test beam reveal the energy resolution for electrons in the EMCal is 2.8%? 15.5%/?E and the energy resolution for hadrons in the combined EMCal plus HCal system is 13.5%?64.9%/?E. These results demonstrate that the performance of the proposed calorimeter system satisfies the sPHENIX specifications.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	IEEE Transactions On Nuclear Science. - 65 : 12 (2018), p. 2901-2919. -
További szerzők:	Bailey, Virginia Beckman, S. Belmont, R. Biggs, C. Blackburn, J. Boose, S. Chiu, M. Connors, M. Desmond, E. Franz, A. Haggerty, J. S. He, Xiaochun Higdon, M. M. Huang, Jin Kauder, Kolja Kistenev, E. LaBounty, J. Lajoie, J. G. Lenz, M. Lenz, W. Li, S. Loggins, V. R. Mannel, Eric J. Majoros Tamás (1991-) (mérnök, informatikus) McCumber, M. P. Nagle, J. L. Phipps, M. Pinkenburg, Christopher Polizzo, S. Pontieri, C. Purschke, M. L. Putschke, J. Sarsour, M. Rinn, T. Ruggiero, R. Sen, A. Sickles, A. M. Skoby, M. J. Smiga, J. Sobel, P. Stankus, P. W. Stoll, S. Sukhanov, A. Thorsland, E. Toldo, F. Towell, R. S. Ujvári Balázs (1977-) (fizikus) Vazquez-Carson, S. Woody, C. L.
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001-es BibID:	BIBFORM125059
035-os BibID:	(WOS)000235371900045 (Scopus)33144478937
Első szerző:	Biebel, Otmar
Cím:	Test and calibration of large drift tube chambers with cosmic rays / Otmar Biebel, Tim Christiansen, Jörg Dubbert, Johannes Elmsheuser, Frank Fiedler, Ralf Hertenberger, Oliver Kortner, Thomas Nunnemann, Felix Rauscher, Dorothee Schaile, Arnold Staude, Raimund Ströhmer, Balázs Újvári, Cornelius F. Vollmer
Dátum:	2005
ISSN:	0018-9499
Megjegyzések:	A cosmic ray measurement facility has been set up at Ludwig-Maximilians-University Munich (LMU) and is used at present to commission and calibrate Monitored Drift Tube (MDT) chambers for the muon spectrometer of the ATLAS experiment. Each of these chambers-produced in collaboration with the Max-Planck-Institut fur Physik and the Joint Institute for Nuclear Research in Dubna-consists of 432 drift tubes with a diameter of 3 cm, which are arranged in 2 x 3 layers, and measures 3.8 m x 2.2 m x 0.5 m. At the LMU site, the MDT chambers are completed, equipped with their final front-end electronics and taken into operation for the first time. The gas leak rate of the chamber is determined and its high voltage stability is tested. The response of all drift tubes and its homogeneity across the chamber is measured in the Cosmic Ray Facility. Two MDT chambers which were precisely mapped with an X-Ray tomograph provide reference tracking for the enclosed third chamber which is to be calibrated. The sense wire positions are determined from a comparison of the drift time measurements with the reference tracks. The geometry of the tested chamber-the grid constants of the drift tubes in a layer, the distances and tilt angles of the layers-can then be derived from these positions. Alignment systems are used to monitor chamber movements at the micrometer level. In the ongoing series commissioning, a rate of one chamber per week has been achieved. The parameters describing the geometry of the MDT chambers are determined with a precision in the 10 mu m range. The measurements with cosmic muons complement the chamber surveys performed during construction and will provide an important input for the calibration of the entire ATLAS muon spectrometer.
Tárgyszavak:	Természettudományok Fizikai tudományok konferenciacikk folyóiratcikk ATLAS Calibration Commissioning Cosmic ray Drift tube Large Hadron Collider (LHC) Monitored Drift Tube (MDT) chamber Muon spectrometer
Megjelenés:	Ieee Transactions On Nuclear Science. - 52 : 6 (2005), p. 2998-3004. -
További szerzők:	Christiansen, Tim Dubbert, Jörg Elmsheuser, Johannes Fiedler, Frank Hertenberger, Ralf Kortner, Oliver Nunnemann, Thomas Rauscher, Felix Schaile, Dorothee Staude, Arnold Ströhmer, Raimund Ujvári Balázs (1977-) (fizikus) Vollmer, Cornelius F.
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001-es BibID:	BIBFORM086133
035-os BibID:	(WoS)000476784700007 (Scopus)85069542052
Első szerző:	Bíró Barna
Cím:	A Comparison of the Effects of Neutron and Gamma Radiation in Silicon Photomultipliers / B. Biro, G. David, A. Fenyvesi, J. S. Haggerty, J. Kierstead, E. J. Mannel, T. Majoros, J. Molnar, F. Nagy, S. Stoll, B. Ujvari, C. L. Woody
Dátum:	2019
ISSN:	0018-9499
Megjegyzések:	The effects of radiation damage in silicon photomultipliers (SiPMs) from gamma rays have been measured and compared with the damage produced by neutrons. Several types of multipixel photon counters from Hamamatsu were exposed to gamma rays and neutrons at the Solid State Gamma Ray Irradiation Facility (SSGRIF) at the Brookhaven National Laboratory and the Institute for Nuclear Research (Atomki) in Debrecen, Hungary. The gamma ray exposures ranged from 1 krad to 1 Mrad and the neutron exposures ranged from 10 8 to 10 12 n/cm 2 . The main effect of gamma ray damage is an increase in the noise and leakage current in the irradiated devices, similar to what is seen from neutron damage, but the level of damage is considerably less at comparable high levels of exposure. In addition, the damage from gamma rays saturates after a few hundred krad, while the damage from neutrons shows no sign of saturation, suggestive of different damage mechanisms in the two cases. The change in optical absorption in the window material of the SiPMs due to radiation was also measured. This paper was carried out in order to evaluate the use of SiPMs for particle physics applications with moderate levels of radiation exposures.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	IEEE Transactions On Nuclear Science. - 66 : 7 (2019), p. 1833-1839. -
További szerzők:	Dávid Gábor (fizikus) Fenyvesi András Haggerty, J. S. Kierstead, J. Mannel, Eric J. Majoros Tamás (1991-) (mérnök, informatikus) Molnár József Nagy Ferenc (1984-) (fizikus) Stoll, S. Ujvári Balázs (1977-) (fizikus) Woody, C. L.
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001-es BibID:	BIBFORM015699
Első szerző:	Hegyesi Gyula (villamosmérnök)
Cím:	Ethernet Based Distributed Data Acquisition System for a Small Animal PET / Gy. Hegyesi, J. Imrek, G. Kalinka, J. Molnár, D. Novák, J. Végh, L. Balkay, M. Emri, S. A. Kis, G. Molnár, L. Trón, I. Valastyán, I. Bagaméry, T. Bükki, S. Rózsa, Zs. Szabó, A. Kerek
Dátum:	2006
ISSN:	0018-9499
Megjegyzések:	We report on the design of a small animal PET scanner being developed at our institutes. The existing setup is the first version of the miniPET machine consisting of four detector modules. Each detector module consists of an 8times8 LSO scintillator crystal block, a position sensitive photomultiplier, a digitizer including a digital signal processing board and an Ethernet interface board. There is no hardware coincidence detection implemented in the system and coincidence is determined based on a time stamp attached to every event by a digital CFD algorithm. The algorithm is implemented in the digital signal processing board and generates a time stamp with a coincidence resolution of less than 2 ns. The data acquisition system is based on Ethernet network and is highly scalable in size and performance
Tárgyszavak:	Műszaki tudományok Villamosmérnöki tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Ieee Transactions On Nuclear Science 53 : 4 (2006), p. 2112-2117. -
További szerzők:	Imrek József (1980-) Kalinka Gábor Molnár József (1954-) (villamosmérnök) Novák Dezső Imre (1971-) (villamosmérnök) Végh János (1953-) (fizikus) Balkay László (1963-) (biofizikus) Emri Miklós (1962-) (fizikus) Kis Sándor Attila (1973-) (fizikus) Molnár Gergely (1979-) (informatikus) Trón Lajos (1941-) (biofizikus) Valastyán Iván (1979-) (fizikus, informatikus) Bagaméry István Bükki Tamás Rózsa Sándor (villamosmérnök) Szabó Zsolt (1963-) (fizikus) Kerék András (fizikus)
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