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RISS 인기검색어
- 검색키워드
- 저자 : Sehwook Lee (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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On the limits of the hadronic energy resolution of calorimeters
Lee, Sehwook,Livan, Michele,Wigmans, Richard Elsevier 2018 Nuclear Instruments & Methods in Physics Research. Vol.882 No.-
<P><B>Abstract</B></P> <P>In particle physics experiments, the quality of calorimetric particle detection is typically considerably worse for hadrons than for electromagnetic showers. In this paper, we investigate the root causes of this problem and evaluate two different methods that have been exploited to remedy this situation: compensation and dual readout. It turns out that the latter approach is more promising, as evidenced by experimental results.</P>
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Fiber and crystals dual readout calorimeters
Cascella, Michele,Franchino, Silvia,Lee, Sehwook World Scientific 2016 International Journal of Modern Physics A Vol.31 No.33
<P> The RD52 (DREAM) collaboration is performing R&D on dual readout calorimetry techniques with the aim of improving hadronic energy resolution for future high energy physics experiments. The simultaneous detection of Cherenkov and scintillation light enables us to measure the electromagnetic fraction of hadron shower event-by-event. As a result, we could eliminate the main fluctuation which prevented from achieving precision energy measurement for hadrons. We have tested the performance of the lead and copper fiber prototypes calorimeters with various energies of electromagnetic particles and hadrons. During the beam test, we investigated the energy resolutions for electrons and pions as well as the identification of those particles in a longitudinally unsegmented calorimeter. Measurements were also performed on pure and doped PbWO4 crystals, as well as BGO and BSO, with the aim of realizing a crystal based dual readout detector. We will describe our results, focusing on the more promising properties of homogeneous media for the technique. Guidelines for additional developments on crystals will be also given. Finally we discuss the construction techniques that we have used to assemble our prototypes and give an overview of the ones that could be industrialized for the construction of a full hermetic calorimeter. </P>
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Online System for Normalizing Data Acquired by the Fermilab DO Experiment
박성근,홍성종,Elizabeth Gallas,Gregory Snow,Heidi Schellman,Jaewon Park,Jason Stein,John Hauptman,이경세,Michael Begel,Sahal Yacoob,Sehwook Lee,Sung Hwan Ahn,Tae Jeong Kim,Tim Andeen,Vladimir Sirontenko 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
The DØ experiment uses a dedicated data acquisition system to collect, archive, monitor, and distribute the information necessary to normalize triggered data for physics analyses. This system has been in place since the beginning of Run 2 of the Fermilab Tevatron collider in 2001 and provides real-time feedback on the instantaneous and triggered luminosities in the DØ and Tevatron control rooms, as well as the status reports needed for smooth operation of the experiment. This paper describes the architecture and the implementation of this system.T
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