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Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
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46609
Papers 46607
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Abstract For the Belle II experiment at KEK (Tsukuba, Japan) the KEKB accelerator was upgraded to deliver a 40 times larger instantaneous luminosity than before, which requires an increased radiation hardness of the detector components. As the innermost part of the Belle II detector, the pixel detector (PXD), based on DEPFET (DEpleted P-channel Field Effect Transistor) technology, is most exposed to radiation from the accelerator. An irradiation campaign was performed to verify that the PXD can ...
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#1P. Chatagnon (Université Paris-Saclay)H-Index: 2
#2Julien Bettane (Université Paris-Saclay)H-Index: 1
Last.R. Wang (Université Paris-Saclay)H-Index: 1
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Abstract The Central Neutron Detector is a scintillator barrel that was designed to detect 0.2-1 GeV neutrons at lab polar angles from 40 ∘ to 120 ∘ in the CLAS12 spectrometer in Hall B at Jefferson Laboratory. The design is based on three radial layers of paddles read out at the upstream end of the barrel by photomultipliers tubes. Neighboring paddles in each layer are coupled together at the downstream end of the barrel by “U-turn” light guides. The components of this detector are presented an...
6 CitationsSource
#1Jin Wu (CAS: Chinese Academy of Sciences)H-Index: 1
#2Yuan Zhang (CAS: Chinese Academy of Sciences)H-Index: 3
Last.Demin Zhou (KEK)H-Index: 5
view all 6 authors...
Abstract In storage rings, the dynamic aperture is a key concept of nonlinear beam dynamics to evaluate the overall machine performance. Therefore, its optimization becomes very essential, especially during the design stage of a machine. In recent years, with the progress in the field of parallel computing, various multi-objective optimization algorithms have been widely applied to the dynamic aperture optimization of storage ring light sources. In this paper, an alternative algorithm, so-called...
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#1M. Ungaro (JLab: Thomas Jefferson National Accelerator Facility)H-Index: 7
#2G. Angelini (GW: George Washington University)H-Index: 1
Last.Veronique Ziegler (JLab: Thomas Jefferson National Accelerator Facility)H-Index: 1
view all 34 authors...
Abstract The Geant4 Monte-Carlo (GEMC) package is used to simulate the passage of particles through the various CLAS12 detectors. The geometry is implemented through a database of Geant4 volumes created either through the GEMC native API, by the CLAS12 geometry service, or imported from the CAD engineering model. The truth information is digitized with a plugin mechanism by routines specific to each detector and includes the use of the CLAS12 calibration database constants to produce both ADC an...
7 CitationsSource
Abstract This document presents the technical layout and the performance of the CLAS12 Forward Tagger (FT). The FT, composed of an electromagnetic calorimeter based on PbWO4 crystals (FT-Cal), a scintillation hodoscope (FT-Hodo), and several layers of Micromegas trackers (FT-Trk), has been designed to detect electrons and photons scattered at polar angles from 2 ∘ to 5 ∘ and to meet the physics goals of the hadron spectroscopy program and other experiments running with the CLAS12 spectrometer in...
7 CitationsSource
#1N. Baltzell (JLab: Thomas Jefferson National Accelerator Facility)H-Index: 4
#2Volker D. Burkert (JLab: Thomas Jefferson National Accelerator Facility)H-Index: 40
Last.Brian A. Raue (FIU: Florida International University)H-Index: 35
view all 15 authors...
Abstract This paper describes the Hall B beamline and its performance during the first year of data-taking operation using the CLAS12 detector. We review the beamline instrumentation used to measure and monitor the beam. This instrumentation led to excellent beam quality for energies ranging from 2.2 to 10.6 GeV at the design luminosity of 1 0 35 cm−2s−1. The instrumentation includes a Moller polarimeter, which can typically measure the beam polarization to an absolute precision of ∼ 2.5%.
3 CitationsSource
#1Rusi P. Taleyarkhan (Purdue University)H-Index: 11
#2B. ArchambaultH-Index: 5
Last.A. Hagen (PNNL: Pacific Northwest National Laboratory)H-Index: 3
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Abstract This article discusses outcome of research for a novel, fast-to-thermal, continuous and pulsed neutron-spectroscopy enabled H*10 dosimetry capable (gamma-beta blind), high intrinsic efficiency sensor system utilizing the tensioned metastable fluid detector (TMFD) architecture. In our past studies the response matrix was developed in single-atom-spectroscopy mode due to which TMFD sensing fluids were limited to one with molecules for which only one atom was considered as causing detectio...
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#1Jonas Pforr (Technische Universität Darmstadt)
#2Michaela Arnold (Technische Universität Darmstadt)H-Index: 1
Last.N. Pietralla (Technische Universität Darmstadt)H-Index: 30
view all 5 authors...
Abstract A new emittance measurement system has been installed at the superconducting, recirculating electron accelerator S-DALINAC. It is based on the quadrupole-scan technique and beam profile measurements with optical transition radiation. A first demonstration of this setup has been conducted as part of the beam-based alignment of an SRF cavity. The corresponding emittance measurement is described here, and the following data evaluation is discussed.
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#1Xunzhen Yu (College of Science and Technology)
#2Francesco Granato (College of Science and Technology)
Last.Peter F. Smith (UCLA: University of California, Los Angeles)
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Abstract Reaction Ion Microscopes (RIMs) are axial-field electrostatic spectrometers extensively used in atomic physics to study few-body reactions. The high resolution and 4 π solid angle acceptance achievable with these devices have made them essential tools for studies of atomic physics. The sources of reacting particles in such studies are often spatially extended (Magneto Optical Traps (MOT) or supersonic gas jets), requiring the spectrometers to focus in both the longitudinal and transvers...
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Abstract In this paper we present the numerical simulation of silicon detectors with internal gain as the main tool for 4-dimensional (4D) particle trackers design and optimization. The Low-Gain Avalanche Diode (LGAD) technology and its present limitations are reviewed with the aim of introducing the Resistive AC-Coupled Silicon Detectors (RSD) paradigm as a case study of our investigation. Authors here present Spice-like and 2D/3D Technological Computer-Aided Design (TCAD) simulations to charac...
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