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Search Results: 1 - 10 of 461337 matches for " A. Dyshkant "
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Hamamatsu PMT R7056 Study for the Extinction Monitoring System of the Mu2e Experiment at Fermilab
S. Boi,A. Dyshkant,D. Hedin,E. Johnson,E. Prebys,P. Rubinov
Physics , 2015,
Abstract: The Mu2e experiment at Fermilab proposes to search for the coherent neutrino-less conversion of muons to electrons in the presence of a nucleus. The experimental signature for an aluminum target is an isolated 105 MeV electron exiting the stopping target no earlier than ~700 ns after the pulse of proton beam hits the production target. Any protons that hit the production target in between the pulses can lead to fake conversion electrons during the measurement period. We define the beam extinction as the ratio of the number of protons striking the production target between pulses to the number striking the target during the pulses. It has been established that an extinction of approximately 10-10 is required to reduce the backgrounds to an acceptable level. It would be desirable to measure the extinction of the beam coming out of the accelerator in a minute or less. Studies for the fast extinction monitor based on Hamamatsu PMT R7056 is the subject of this presentation.
LCDG4 and DigiSim - Simulation activities at NICADD/NIU
D. Beznosko,G. Blazey,D. Chakraborty,A. Dyshkant,K. Francis,D. Kubik,J. G. R. Lima,J. McCormick,R. McIntosh,V. Rykalin,V. Zutshi
Physics , 2005,
Abstract: We present two software packages developed to support detector R&D studies for the International Linear Collider. LCDG4 is a full-detector simulator that provides energy deposits from particles traversing the sensitive volumes of the detector. It has been extensively used within the American ILC community, providing data for algorithm development and detector optimization studies. DigiSim models real-life digitization effects, converting the idealized response into simulated detector readout. It has many useful features to improve the realism in modeling detector response. The main characteristics of these two complementary packages are discussed.
A New Proton CT Scanner
G. Coutrakon,G. Blazey,S. Boi,A. Dyshkant,B. Erdelyi,D. Hedin,E. Johnson,J. Krider,V. Rykalin,S. A. Uzunyan,V. Zutshi,R. Fordt,G. Sellberg,J . E. Rauch,M. Roman,P. Rubinov,P. Wilson,M. Naimuddin
Physics , 2014,
Abstract: The design, construction, and preliminary testing of a second generation proton CT scanner is presented. All current treatment planning systems at proton therapy centers use X-ray CT as the primary imaging modality for treatment planning to calculate doses to tumor and healthy tissues. One of the limitations of X-ray CT is in the conversion of X-ray attenuation coefficients to relative (proton) stopping powers, or RSP. This results in more proton range uncertainty, larger target volumes and therefore, more dose to healthy tissues. To help improve this, we present a novel scanner capable of high dose rates, up to 2~MHz, and large area coverage, 20~x~24~cm$^2$, for imaging an adult head phantom and reconstructing more accurate RSP values.
Development of a proton Computed Tomography Detector System
Md. Naimuddin,G. Coutrakon,G. Blazey,S. Boi,A. Dyshkant,B. Erdelyi,D. Hedin,E. Johnson,J. Krider,V. Rukalin,S. A. Uzunyan,V. Zutshi,R. Fordt,G. Sellberg,J. E. Rauch,M. Roman,P. Rubinov,P. Wilson
Physics , 2015,
Abstract: Computer tomography is one of the most promising new methods to image abnormal tissues inside the human body. Tomography is also used to position the patient accurately before radiation therapy. Hadron therapy for treating cancer has become one of the most advantageous and safe options. In order to fully utilize the advantages of hadron therapy, there is a necessity of performing radiography with hadrons as well. In this paper we present the development of a proton computed tomography system. Our second-generation proton tomography system consists of two upstream and two downstream trackers made up of fibers as active material and a range detector consisting of plastic scintillators. We present details of the detector system, readout electronics, and data acquisition system as well as the commissioning of the entire system. We also present preliminary results from the test beam of the range detector.
Production Asymmetry Measurement of High Xt Hadrons in pp Collisions at 40 GeV
V. V. Abramov,A. S. Dyshkant,V. N. Evdokimov,P. I. Goncharov,A. M. Gorin,A. N. Gurzhiev,Yu. P. Korneev,A. V. Kostritskii,A. N. Krinitsyn,V. I. Kryshkin,Yu. M. Mel'nik,V. M. Podstavkov,N. I. Sin'kin,S. I. Tereshenko,L. K. Turchanovich,A. E. Yakutin,A. A. Zaichenko,V. N. Zapol'sky
Physics , 2001, DOI: 10.1016/S0550-3213(97)80025-9
Abstract: Single-spin asymmetries for hadrons have been measured in collisions of transversely-polarized 40 GeV/c proton beam with an unpolarized liquid hydrogen target. The asymmetries were measured for pi+-, K+-, protons and antiprotons, produced in the central region (0.02 < Xf < 0.10 and 0.7 < Pt < 3.4 GeV/c). Asymmetries for pi+-, K+- and antiprotons show within measurement errors the linear dependence on Xt and change a sign near 0.37. For protons negative asymmetry, independent of Xt has been found. The results are compared with those of other experiments and SU(6) model predictions.
Development of a proton Computed Tomography (pCT) scanner at NIU
S. A. Uzunyan,G. Blazey,S. Boi,G. Coutrakon,A. Dyshkant,B. Erdelyi,A. Gearhart,D. Hedin,E. Johnson,J. Krider,V. Zutshi,R. Ford,T. Fitzpatrick,G. Sellberg,J. E. Rauch,M. Roman,P. Rubinov,P. Wilson,K. Lalwani,M. Naimuddin
Physics , 2013,
Abstract: We describe the development of a proton Computed Tomography (pCT) scanner at Northern Illinois University (NIU) in collaboration with Fermilab and Delhi University. This paper provides an overview of major components of the scanner and a detailed description of the data acquisition system (DAQ).
Progress in Absorber R&D for Muon Cooling
D. M. Kaplan,E. L. Black,M. Boghosian,K. W. Cassel,R. P. Johnson,S. Geer,C. J. Johnstone,M. Popovic,S. Ishimoto,K. Yoshimura,L. Bandura,M. A. Cummings,A. Dyshkant,D. Hedin,D. Kubik,C. Darve,Y. Kuno,D. Errede,M. Haney,S. Majewski,M. Reep,D. Summers
Physics , 2001, DOI: 10.1016/S0168-9002(03)00723-X
Abstract: A stored-muon-beam neutrino factory may require transverse ionization cooling of the muon beam. We describe recent progress in research and development on energy absorbers for muon-beam cooling carried out by a collaboration of university and laboratory groups.
Progress in Absorber R&D 2: Windows
D. M. Kaplan,E. L. Black,K. W. Cassel,S. Geer,M. Popovic,S. Ishimoto,K. Yoshimura,L. Bandura,M. A. Cummings,A. Dyshkant,D. Kubik,D. Hedin,C. Darve,Y. Kuno,D. Errede,M. Haney,S. Majewski,M. Reep,D. Summers
Physics , 2001,
Abstract: A program is underway to develop liquid-hydrogen energy absorbers for ionization cooling of muon-beam transverse emittance. Minimization of multiple-scattering-induced beam heating requires thin windows. The first window prototype has been destructively tested, validating the finite-element-analysis model and the design approach.
Studies of the Response of the Prototype CMS Hadron Calorimeter, Including Magnetic Field Effects, to Pion, Electron, and Muon Beams
V. V. Abramov,B. S. Acharya,N. Akchurin,I. Atanasov,G. Baiatian,A. Ball,S. Banerjee,P. de Barbaro,V. Barnes,G. Bencze,A. Bodek,M. Booke,H. Budd,L. Cremaldi,P. Cushman,S. R. Dugad,L. Dimitrov,A. Dyshkant,J. Elias,V. N. Evdokimov,D. Fong,J. Freeman,V. Genchev,P. I. Goncharov,D. Green,A. Gurtu,V. Hagopian,P. Iaydijiev,Yu. Korneev,A. Krinitsyn,G. Krishnaswami,M. R. Krishnaswamy,V. Kryshkin,S. Kunori,A. Laasanen et. al
Physics , 2000, DOI: 10.1016/S0168-9002(00)00711-7
Abstract: We report on the response of a prototype CMS hadron calorimeter module to charged particle beams of pions, muons, and electrons with momenta up to 375 GeV/c. The data were taken at the H2 and H4 beamlines at CERN in 1995 and 1996. The prototype sampling calorimeter used copper absorber plates and scintillator tiles with wavelength shifting fibers for readout. The effects of a magnetic field of up to 3 Tesla on the response of the calorimeter to muons, electrons, and pions are presented, and the effects of an upstream lead tungstate crystal electromagnetic calorimeter on the linearity and energy resolution of the combined calorimetric system to hadrons are evaluated. The results are compared with Monte Carlo simulations and are used to optimize the choice of total absorber depth, sampling frequency, and longitudinal readout segmentation.
Construction and Commissioning of the CALICE Analog Hadron Calorimeter Prototype
C. Adloff,Y. Karyotakis,J. Repond,A. Brandt,H. Brown,K. De,C. Medina,J. Smith,J. Li,M. Sosebee,A. White,J. Yu,T. Buanes,G. Eigen,Y. Mikami,O. Miller,N. K. Watson,J. A. Wilson,T. Goto,G. Mavromanolakis,M. A. Thomson,D. R. Ward,W. Yan,D. Benchekroun,A. Hoummada,Y. Khoulaki,M. Oreglia,M. Benyamna,C. Carloganu,P. Gay,J. Ha,G. C. Blazey,D. Chakraborty,A. Dyshkant,K. Francis,D. Hedin,G. Lima,V. Zutshi,V. A. Babkin,S. N. Bazylev,Yu. I. Fedotov,V. M. Slepnev,I. A. Tiapkin,S. V. Volgin,J. -Y. Hostachy,L. Morin,N. D?Ascenzo,U. Cornett,D. David,R. Fabbri,G. Falley,N. Feege,K. Gadow,E. Garutti,P. G?ttlicher,T. Jung,S. Karstensen,V. Korbel,A. -I. Lucaci-Timoce,B. Lutz,N. Meyer,V. Morgunov,M. Reinecke,S. Sch?tzel,S. Schmidt,F. Sefkow,P. Smirnov,A. Vargas-Trevino,N. Wattimena,O. Wendt,M. Groll,R. -D. Heuer,S. Richter,J. Samson,A. Kaplan,H. -Ch. Schultz-Coulon,W. Shen,A. Tadday,B. Bilki,E. Norbeck,Y. Onel,E. J. Kim,G. Kim,D-W. Kim,K. Lee,S. C. Lee,K. Kawagoe,Y. Tamura,J. A. Ballin,P. D. Dauncey,A. -M. Magnan,H. Yilmaz,O. Zorba,V. Bartsch,M. Postranecky,M. Warren,M. Wing,M. Faucci Giannelli,M. G. Green,F. Salvatore,R. Kieffer,I. Laktineh,M. C Fouz,D. S. Bailey,R. J. Barlow,R. J. Thompson,M. Batouritski,O. Dvornikov,Yu. Shulhevich,N. Shumeiko,A. Solin,P. Starovoitov,V. Tchekhovski,A. Terletski,B. Bobchenko,M. Chadeeva,M. Danilov,O. Markin,R. Mizuk,V. Morgunov,E. Novikov,V. Rusinov,E. Tarkovsky,V. Andreev,N. Kirikova,A. Komar,V. Kozlov,P. Smirnov,Y. Soloviev,A. Terkulov,P. Buzhan,B. Dolgoshein
Physics , 2010, DOI: 10.1088/1748-0221/5/05/P05004
Abstract: An analog hadron calorimeter (AHCAL) prototype of 5.3 nuclear interaction lengths thickness has been constructed by members of the CALICE Collaboration. The AHCAL prototype consists of a 38-layer sandwich structure of steel plates and highly-segmented scintillator tiles that are read out by wavelength-shifting fibers coupled to SiPMs. The signal is amplified and shaped with a custom-designed ASIC. A calibration/monitoring system based on LED light was developed to monitor the SiPM gain and to measure the full SiPM response curve in order to correct for non-linearity. Ultimately, the physics goals are the study of hadron shower shapes and testing the concept of particle flow. The technical goal consists of measuring the performance and reliability of 7608 SiPMs. The AHCAL was commissioned in test beams at DESY and CERN. The entire prototype was completed in 2007 and recorded hadron showers, electron showers and muons at different energies and incident angles in test beams at CERN and Fermilab.
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