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  • Fast inference of Boosted Decision Trees in FPGAs for particle physics
    J. Instrum. (IF 1.366) Pub Date : 2020-05-28
    S. Summers, G. Di Guglielmo, J. Duarte, P. Harris, D. Hoang, S. Jindariani, E. Kreinar, V. Loncar, J. Ngadiuba, M. Pierini, D. Rankin, N. Tran and Z. Wu

    We describe the implementation of Boosted Decision Trees in the hls4ml library, which allows the translation of a trained model into FPGA firmware through an automated conversion process. Thanks to its fully on-chip implementation, hls4ml performs inference of Boosted Decision Tree models with extremely low latency. With a typical latency less than 100 ns, this solution is suitable for FPGA-based real-time

    更新日期:2020-05-28
  • CALICE SiW ECAL—Development and performance of a highly compact digital readout system
    J. Instrum. (IF 1.366) Pub Date : 2020-05-28
    D. Breton, A. Irles, J. Jeglot, J. Maalmi, R. Pöschl and D. Zerwas

    A highly granular silicon-tungsten electromagnetic calorimeter (SiW-ECAL) is the reference design of the ECAL of the International Large Detector (ILD) concept, one of the two detector concepts for the detector(s) at the future International Linear Collider. Prototypes for this type of detector are developed within the CALICE Collaboration. During the last year a highly compact digital readout system

    更新日期:2020-05-28
  • Automated detector simulation and reconstruction parametrization using machine learning
    J. Instrum. (IF 1.366) Pub Date : 2020-05-28
    D. Benjamin, S. Chekanov, W. Hopkins, Y. Li and J.R. Love

    Rapidly applying the effects of detector response to physics objects (e.g. electrons, muons, showers of particles) is essential in high energy physics. Currently available tools for the transformation from truth-level physics objects to reconstructed detector-level physics objects involve manually defining resolution functions. These resolution functions are typically derived in bins of variables that

    更新日期:2020-05-28
  • Coherent X-ray radiation excited by a beam of relativistic electrons in a layered periodic structure
    J. Instrum. (IF 1.366) Pub Date : 2020-05-28
    S. Blazhevich, A. Noskov and O. Shevchuk

    The dynamic theory of coherent X-ray radiation, excited in a periodic layered medium by a divergent beam of relativistic electrons in the Bragg scattering geometry, is developed. In framework of the two-wave approximation of the dynamic theory of diffraction, expressions describing the spectral-angular and angular distributions of parametric X-ray radiation (PXR) and diffracted transition radiation

    更新日期:2020-05-28
  • Impact of transverse magnetic fields on water equivalent ratios in carbon-ion radiotherapy
    J. Instrum. (IF 1.366) Pub Date : 2020-05-28
    M. Akbari and A. Karimian

    The correct estimation of water equivalent ratio (WER) and the associated errors is highly important for the delivery of carbon-ion (C-ion) beams. In the case of MRI-guided C-ion radiotherapy (MRgCT) scenario, as a therapeutic approach for future potential MR-guided particle therapy, C-ion beam will be deflected in the presence of the magnetic field. The curvature of the track causes a retraction of

    更新日期:2020-05-28
  • An instrument for precision controlled radiation exposures, charged beam profile measurement, and real-time fluence monitoring beyond 10 16 n eq /cm 2
    J. Instrum. (IF 1.366) Pub Date : 2020-05-28
    M.R. Hoeferkamp, J.S.T. Wickramasinghe, A. Grummer, I. Rajen and S. Seidel

    An instrument has been developed for precision controlled exposures of electronic devices and material samples in particle beams. The instrument provides simultaneously a real time record of the profile of the beam and the fluence received. The system is capable of treating devices with dimensional scales ranging from millimeters to extended objects of cross sections measured in tens of square centimeters

    更新日期:2020-05-28
  • Status of Geant4 simulations of calorimeters
    J. Instrum. (IF 1.366) Pub Date : 2020-05-28
    A. Howard, V. Ivanchenko, M. Novak and A. Ribon

    Geant4 is the main software tool for Monte Carlo simulations of the calorimeter response in high energy physics (HEP). In this work, we report recent developments of Geant4 physics models, which are available in version 10.6, released in December 2019. The main directions of Geant4 developments are discussed: improvements of physics model accuracy, technical modifications to increase CPU performance

    更新日期:2020-05-28
  • Calibration of MPD electromagnetic calorimeter with muons
    J. Instrum. (IF 1.366) Pub Date : 2020-05-28
    A.Yu. Semenov, I.A. Semenova, M. Bhattacharjee, A. Durum, Yu. Krechetov, V. Kulikov, I. Mamonov and M. Martemianov

    The shashlyk-type electromagnetic calorimeter (ECal) of the Multi-Purpose Detector at heavy-ion NICA collider is optimized to provide precise spatial and energy measurements for photons and electrons in the energy range from about 40 MeV to 2–3 GeV . To deal with high multiplicity of secondary particles from Au-Au reactions, ECal has a fine segmentation and consists of 38,400 cells ("towers"). Given

    更新日期:2020-05-28
  • Commissioning of a new commercial Optically Stimulated Luminescence (OSL) dosimetry system for VMAT treatments verifications
    J. Instrum. (IF 1.366) Pub Date : 2020-05-28
    E. Bonanno, N. Cavalli, G. Stella, A. D'Agostino, A. Girlando, G. Pisasale, N. Ricottone and C. Marino

    A new commercial OSL dosimetry system was studied to analyze the possibility of its use for VMAT planning checks with end-to-end approach. The system was characterized and tested in conventional dose range (0,25–3 Gy). NanoDots (Landauer®), with new readout system MicroSTARii™, were characterized in terms of: signal decrease for repeated readings; angular, energy and dose-rate dependence. A calibration

    更新日期:2020-05-28
  • RPC upgrade project for CMS Phase II
    J. Instrum. (IF 1.366) Pub Date : 2020-05-28
    M.I. Pedraza-Morales, A. Fagot, M. Gul, C. Roskas, M. Tytgat, N. Zaganidis, S. Fonseca De Souza, A. Santoro, F. Torres Da Silva De Araujo, A. Aleksandrov, R. Hadjiiska, P. Iaydjiev, M. Rodozov, M. Shopova, G. Sultanov, A. Dimitrov, L. Litov, B. Pavlov, P. Petkov, A. Petrov, S.J. Qian, D. Han, W. Yi, C. Avila, A. Cabrera, C. Carrillo, M. Segura, S. Aly, Y. Assran, A. Mahrous, A. Mohamed, C. Combaret

    The Muon Upgrade Phase II of the Compact Muon Solenoid (CMS) aims to guarantee the optimal conditions of the present system and extend the η coverage to ensure a reliable system for the High Luminosity Large Hadron Collider (HL-LHC) period. The Resistive Plate Chambers (RPCs) system will upgrade the off-detector electronics (called link system) of the chambers currently installed chambers and place

    更新日期:2020-05-28
  • Imaging performance dependence on crystal absorption properties: the CRY018 and CRY019 comparison
    J. Instrum. (IF 1.366) Pub Date : 2020-05-28
    R. Pellegrini, F. Camera, C. Polito, R. Falconi, M. Bettiol, M. Longo, G. De Vincentis, L. Indovina, R. Pani and V. Frantellizzi

    A proper choice of the scintillation crystal can considerably improve the detector performance in nuclear medicine imaging. In this study two promising crystals, CRY018 and CRY019, are characterized in terms of spectrometric and imaging capabilities. Thanks to the same irradiation conditions, it has been possible to compare their performance for a wide range of energies (30 keV to 662 keV) . They have

    更新日期:2020-05-28
  • Detector Control System for the GE1/1 slice test
    J. Instrum. (IF 1.366) Pub Date : 2020-05-27
    M. Abbas, M. Abbrescia, H. Abdalla, S. Abu Zeid, A. Agapitos, A. Ahmad, A. Ahmed, A. Ahmed, W. Ahmed, S. Amarjeet, I. Asghar, P. Aspell, C. Avila, J. Babbar, Y. Ban, R. Band, S. Bansal, L. Benussi, V. Bhatnagar, M. Bianco, S. Bianco, K. Black, L. Borgonovi, O. Bouhali, A. Braghieri, S. Braibant, S. Butalla, S. Calzaferri, M. Caponero, F. Cassese, N. Cavallo, S. Chauhan, S. Colafranceschi, A. Colaleo

    Gas Electron Multiplier (GEM) technology, in particular triple-GEM, was selected for the upgrade of the CMS endcap muon system following several years of intense effort on R&D. The triple-GEM chambers (GE1/1) are being installed at station 1 during the second long shutdown with the goal of reducing the Level-1 muon trigger rate and improving the tracking performance in the harsh radiation environment

    更新日期:2020-05-27
  • Energy spectrum response of a CsI(Tl) detector read out by an APD
    J. Instrum. (IF 1.366) Pub Date : 2020-05-26
    Yuan-dong Li, Liang-quan Ge, Kun-Sun, Guo-qiang Zeng and Rui Huang

    To study the energy spectrum response of a CsI(Tl) detector, we fabricated a new scintillation detector by coupling a CsI (Tl) crystal with an avalanche photodiode (APD) . Then, we designed a new low-noise readout circuit for the detector. Finally, we analyzed the effects of both temperature and bias voltage on the energy spectrum response and evaluated the capability to identify nuclides by connecting

    更新日期:2020-05-26
  • Electrical characterization of 180 nm ATLASPix2 HV-CMOS monolithic prototypes for the High-Luminosity LHC
    J. Instrum. (IF 1.366) Pub Date : 2020-05-26
    D M S Sultan, S. Gonzalez-Sevilla, D. Ferrere, G. Iacobucci, E. Zaffaroni, W. Wong, M. Kiehn and M. Benoit

    We report on the experimental study made on a successive prototype of High-Voltage Complementary Metal-Oxide-Semiconductor ATLASPix2 sensor for the tracking detector application, developed with 180 nm feature size. These sensors are to qualify mainly the peripheral data processing blocks (e.g. Command Decoder, Trigger Buffer, etc.). Over a decade, the monolithic pixelated sensors for a foreseen application

    更新日期:2020-05-26
  • Using machine learning to separate hadronic and electromagnetic interactions in the GlueX forward calorimeter
    J. Instrum. (IF 1.366) Pub Date : 2020-05-26
    R. Barsotti and M.R. Shepherd

    The GlueX forward calorimeter is an array of 2800 lead glass modules that was constructed to detect photons produced in the decays of hadrons. A background to this process originates from hadronic interactions in the calorimeter, which, in some instances, can be difficult to distinguish from low energy photon interactions. Machine learning techniques were applied to the classification of particle interactions

    更新日期:2020-05-26
  • A novel approach to separate absorption, refraction and scattering in analyzer based lung imaging
    J. Instrum. (IF 1.366) Pub Date : 2020-05-26
    R.H. Menk, L. Rigon, L. Brombal, S. Donato, C. Petris and F. Arfelli

    In analyzer based imaging (ABI) scattering can be efficiently separated from refraction and absorption effects by acquiring three images of the sample. In the scattering image the lungs appear as areas of high intensity signal (area contrast), which is modulated by the local thickness of the scattering tissue intersecting the X-ray path. The scattering signal is also included in the so-called apparent

    更新日期:2020-05-26
  • Simulation study on sensitivity performance of a helmet-shaped brain PET scanner based on the Plug&Imaging detector design
    J. Instrum. (IF 1.366) Pub Date : 2020-05-26
    E. Antonecchia, Q. Chu, A. Di Costanzo, Z. Li, L. Wan, N. D'Ascenzo and Q. Xie

    Novel design solutions for the functional imaging of patients suffering of motion disorders represent the frontiers of nuclear medicine and neurology. We report the design and simulation of a novel digital helmet-shaped Positron Emission Tomography system with transverse and longitudinal Field Of View of 205 mm and 283.8 mm respectively. We calculated the sensitivity of the system in simulation in

    更新日期:2020-05-26
  • Five transversal beam profile monitors for the ESS Cold Linac
    J. Instrum. (IF 1.366) Pub Date : 2020-05-26
    F. Belloni, F. Benedetti, J. Marroncle, P. Abbon, G. Coulloux, F. Gougnaud, C. Lahonde-Hamdoun, P. Le Bourlout, P. Legou, Y. Mariette, J.P. Mols, V. Nadot, L. Scola, R. Tarkeshian, G. Tauzin and C. Thomas

    In the frame of the in-kind contribution agreement signed with ESS, CEA is going to deliver to the European Spallation Source five Non-invasive Profile Monitors (NPMs) to be installed in the Cold Linac section. The high density of the proton bunches, typically 10 9 proton in a few mm 3 , may lead to space-charge effect distorting the profile measurements. Studies to contain the space charge effects

    更新日期:2020-05-26
  • Silicon sensors for the CMS HGCAL upgrade: challenges, sensor design & electrical characterization
    J. Instrum. (IF 1.366) Pub Date : 2020-05-25
    E. Brondolin

    The CMS detector will undergo significant improvements to face the 10-fold increase in integrated luminosity of LHC, the so-called High-Luminosity LHC, scheduled to start in 2027. This will include a completely new calorimeter in the CMS endcap regions, which should be able to withstand fluences of up to 10 16 n eq /cm 2 . The new High Granularity Calorimeter (HGCAL) will have unprecedented transverse

    更新日期:2020-05-25
  • Energy-reduced beta radiation fields from 90 Sr/ 90 Y for the BSS 2
    J. Instrum. (IF 1.366) Pub Date : 2020-05-25
    R. Behrens

    For decades, the irradiation facility for beta radiation, the Beta Secondary Standard BSS 2 developed at PTB, has been in worldwide use to irradiate dosemeters, detectors and other devices with calibrated beta sources. In this work two energy-reduced radiation fields based on the 90 Sr/ 90 Y source are described. Their electron and photon particle spectra are made available as data files. In addition

    更新日期:2020-05-25
  • Monte-Carlo simulations of the full-energy-peak efficiency for a broad-energy germanium detector—a comparison between GEANT4 and FLUKA
    J. Instrum. (IF 1.366) Pub Date : 2020-05-25
    O. Aviv and P. Elia

    The detection efficiency of a broad-energy germanium detector was determined empirically and compared to predictions by the Monte-Carlo software GEANT4 and FLUKA . The considered source geometries were point-like, filter paper and a water beaker. Calculations were performed in the photon energy range of 30–1836 keV . Simulated detection efficiencies obtained from both Monte-Carlo software were found

    更新日期:2020-05-25
  • Build-up factors for water and soft tissue by MCNP using a co-centric multilayer model: comparative study
    J. Instrum. (IF 1.366) Pub Date : 2020-05-25
    S.M. Vahabi and M. Shamsaie Zafarghandi

    Build-up factor (BF) is one of the radiation interaction parameters, which is important in radiology and power sector to mitigate the radiation risks as low as possible. In this paper, the BF values for water and soft tissue have been computed for gamma rays within the energy range 0.2–2 MeV for penetration depths up to 10 mean free path (mfp), using MCNP simulation code by introducing a co-centric

    更新日期:2020-05-25
  • Ce:LaBr 3 crystals with SiPM array readout and temperature control for the FAMU experiment at RAL
    J. Instrum. (IF 1.366) Pub Date : 2020-05-25
    M. Bonesini, R. Benocci, R. Bertoni, M. Clemenza, D. Ghittori, R. Mazza, E. Vallazza, A. de Bari, A. Menegolli, M. Prata, M. Rossella, M. Baruzzo and E. Mocchiutti

    Compact X-rays detectors made of 1/2'' Ce:LaBr 3 crystals of cubic shape with SiPM array readout have been developed for the FAMU experiment at RIKEN-RAL, to instrument regions of difficult access. Due to the high photon yield of Ce:LaBr 3 it was possible to use a simple readout scheme based on CAEN V1730 digitizers, without a dedicated amplification stage. The drift with temperature of SiPM gain was

    更新日期:2020-05-25
  • Four-dimensional calorimeter to discriminate gammas from neutrons for the KOTO experiment
    J. Instrum. (IF 1.366) Pub Date : 2020-05-25
    M. Osugi

    We study the rare decay K L →π 0 ν ##IMG## [https://ej.iop.org/icons/Entities/barnu.gif] {bar nu} at the J-PARC KOTO experiment. This decay mode is highly suppressed in the Standard Model (SM). The signature of the decay is two gammas from a π 0 decay and no other detectable particles. In the KOTO experiment, the two gammas are measured with a calorimeter which is composed of undoped cesium iodide

    更新日期:2020-05-25
  • A feasibility study of LYSO-GAPD detector for DEXA applications
    J. Instrum. (IF 1.366) Pub Date : 2020-05-25
    J. Yang, B.J. Min and J. Kang

    A LYSO-GAPD detector module was developed for use in DEXA applications, and it was characterized under a variety of conditions. The LYSO with 3 mm × 3 mm × 2 mm pixel size provided a detection efficiency of > 99.9% at 80 keV . It was coupled to a GAPD with an active area of 3.07 mm × 3.07 mm and 5676 microcells. The energy spectra were acquired using different gamma rays. The X-ray energy spectra were

    更新日期:2020-05-25
  • TCAD silicon device simulation for high level of radiation damage
    J. Instrum. (IF 1.366) Pub Date : 2020-05-25
    N. Agrawal, K. Androsov, A. Bhardwaj, M.A. Ciocci, M.T. Grippo, C. Jain, A. Kumar, A. Messineo, S. Parolia, K. Ranjan, S. Saumya, A. Sisodia and S. Sondh

    Silicon detectors are expected to experience an unprecedented radiation flux in the future upgrades of the detectors at the Large Hadron Collider (LHC). The challenging radiation environment of these experiments will severely affect the performance of such detectors, degrading their detection capabilities and imposing severe operational conditions. The modeling of the detectors through Monte Carlo

    更新日期:2020-05-25
  • Approximate method for electromagnetic analysis of a dielectric-loaded coupler used in accelerating structures
    J. Instrum. (IF 1.366) Pub Date : 2020-05-25
    M.Z. Joozdani

    In this paper, a theoretical analysis of a dielectric-loaded coupler based on the transmission line model is proposed. One of the major challenges in the design of dielectric-loaded accelerating (DLA) structures is the proper coupling of high-power RF into the dielectric-loaded tube. The considered X-band coupler consists of a tapered dielectric-loaded tube converting TM 01 mode in a conventional circular

    更新日期:2020-05-25
  • The DUNE dual-phase liquid argon TPC
    J. Instrum. (IF 1.366) Pub Date : 2020-05-25
    E. Chardonnet

    The Deep Underground Neutrino Experiment (DUNE) is a long-baseline project studying an accelerator-made neutrino beam produced at Fermilab. DUNE consists of two detectors placed in the path of the neutrino beam, one near the source and one at the Stanford Underground Research Facility, at a distance of 1300 km and protected by a 1500 m rock overburden. Fundamental features of neutrino oscillation physics

    更新日期:2020-05-25
  • The cryogenic electronics for Dark Side-20k SiPM readout
    J. Instrum. (IF 1.366) Pub Date : 2020-05-25
    L. Consiglio

    The DarkSide-20k experiment aims to the direct WIMP detection in extremely low background conditions, using a Time Projection Chamber (TPC) filled with 40 tons of Liquid Argon and equipped with more than 200000 Silicon Photomultipliers (SiPMs) operated at cryogenic temperature. Since many years, the Bruno Kessler Foundation has been involved in the development of different kind of SiPMs sensitive to

    更新日期:2020-05-25
  • Design and implementation of a time measurement system for Micromegas detector based on the TPC-like method
    J. Instrum. (IF 1.366) Pub Date : 2020-05-25
    X.X. Wang, F. Li, Z.L. Zhang, Z.Y. Zhang, L. Han and G. Jin

    The Micromegas detector is widely used in particle physics experiments due to its high count rate, good spatial resolution and other characteristics. In this article, we developed a drift time measurement system to reconstruct the hit position through the μTPC method. Our system is expected to run on a 768-channel prototype Micromegas detector being developed at the University of Science and Technology

    更新日期:2020-05-25
  • Download by parachute: retrieval of assets from high altitude balloons
    J. Instrum. (IF 1.366) Pub Date : 2020-05-21
    E.L. Sirks, P. Clark, R.J. Massey, S.J. Benton, A.M. Brown, C.J. Damaren, T. Eifler, A.A. Fraisse, C. Frenk, M. Funk, M.N. Galloway, A. Gill, J.W. Hartley, B. Holder, E.M. Huff, M. Jauzac, W.C. Jones, D. Lagattuta, J.S.-Y. Leung, L. Li, T.V.T. Luu, J. McCleary, J.M. Nagy, C.B. Netterfield, S. Redmond, J.D. Rhodes, L.J. Romualdez, J. Schmoll, M.M. Shaaban and S.-I. Tam

    We present a publicly-available toolkit of flight-proven hardware and software to retrieve 5 TB of data or small physical samples from a stratospheric balloon platform. Before launch, a capsule is attached to the balloon, and rises with it. Upon remote command, the capsule is released and descends via parachute, continuously transmitting its location. Software to predict the trajectory can be used

    更新日期:2020-05-21
  • Position reconstruction using photon timing for the DEAP-3600 dark matter experiment
    J. Instrum. (IF 1.366) Pub Date : 2020-05-21
    Y. Chen

    DEAP-3600 is a single-phase liquid argon dark matter detector being operated 2 km underground at SNOLAB, Sudbury, Canada. The detector consists of 3.3 tonnes of ultra-pure liquid argon in a spherical acrylic cryostat instrumented with 255 photomultiplier tubes. Natural radioactive contamination in the acrylic vessel or TPB wavelength shifter can alpha-decay. Reconstruction of the position of the interactions

    更新日期:2020-05-21
  • LHC-ATLAS Phase-I upgrade: calibration and simulation of a new trigger readout system for the Liquid Argon calorimeter
    J. Instrum. (IF 1.366) Pub Date : 2020-05-21
    G. Tateno

    The ATLAS Liquid Argon Calorimeter group has been working on an upgrade of its trigger readout electronics. As part of this upgrade, new trigger "Super Cells" will be introduced, increasing the granularity of the trigger readout by a factor of ten with respect to Run 2. While the production and installation of the new electronics is underway, a calibration framework for the energy and timing measurement

    更新日期:2020-05-21
  • Radiation hard DMAPS pixel sensors in 150 nm CMOS technology for operation at LHC
    J. Instrum. (IF 1.366) Pub Date : 2020-05-21
    M. Barbero, P. Barrillon, C. Bespin, S. Bhat, P. Breugnon, I. Caicedo, Z. Chen, Y. Degerli, J. Dingfelder, S. Godiot, F. Guilloux, T. Hemperek, T. Hirono, F. Hügging, H. Krüger, K. Moustakas, A. Ouraou, P. Pangaud, I. Peric, D.-L. Pohl, P. Rymaszewski, P. Schwemling, M. Vandenbroucke, T. Wang and N. Wermes

    Monolithic Active Pixel Sensors (MAPS) have been developed since the late 1990s employing silicon substrate with a thin epitaxial layer in which deposited charge is collected by disordered diffusion rather than by drift in an electric field. As a consequence the signal is small and slow, and the radiation tolerance is below the requirements for LHC experiments by factors of 100 to 1000. We developed

    更新日期:2020-05-21
  • The Phase II upgrade of the LHCb calorimeter system
    J. Instrum. (IF 1.366) Pub Date : 2020-05-21
    M. Pizzichemi

    The Phase 2 LHCb Upgrade, which is now being developed by the LHCb Collaboration, is supposed to make LHCb able to work at high luminosity, up to 2 ⋅ 10 34 /cm 2 /s. The plan is to collect ~300 fb −1 of data in a few years. The Phase 2 Upgrade will require a major revision of the LHCb Calorimeter system. The increased instantaneous and integrated luminosity will result in very high particle density

    更新日期:2020-05-21
  • Qualification of a compact neutron detector based on SiPM
    J. Instrum. (IF 1.366) Pub Date : 2020-05-20
    R. Santoro, M. Caccia, N. Ampilogov, L. Malinverno, C. Allwork, M. Ellis, A. Abba, F. Caponio and A. Cusimano

    Silicon Photomultipliers (SiPM) are photon sensors featuring high detection efficiency, single photon sensitivity and extended dynamic range; they represent a valuable solution for compact and lightweight hand-held instruments ideal for border control against the illicit trafficking of radioactive material or environmental measurements. This paper reports the results obtained with a standalone compact

    更新日期:2020-05-20
  • The CMS Precision Proton Spectrometer timing system: performance in Run 2, future upgrades and sensor radiation hardness studies
    J. Instrum. (IF 1.366) Pub Date : 2020-05-20
    E. Bossini

    Central exclusive processes can be studied in CMS by combining the information of the central detector with the Precision Proton Spectrometer (PPS). PPS detectors, placed symmetrically at more than 200 m from the interaction point, can detect the scattered protons that survive the interaction. PPS has taken data at high luminosity while fully integrated in the CMS experiment. The total amount of collected

    更新日期:2020-05-20
  • New trends in silicon detector technology
    J. Instrum. (IF 1.366) Pub Date : 2020-05-20
    G. Casse

    Modern detector science and technology has originated from High Energy Physics experiment needs in the '80's of the past century, based on the achievement and knowledge of the silicon industry of the time. The first segmented array of diodes (a microstrip sensor) was developed to track vertices at the NA11 experiment at the SPS accelerator at CERN (Geneva, CH) . During the following years, detector

    更新日期:2020-05-20
  • Imaging 55 Fe electron tracks in a GEM-based TPC using a CCD readout
    J. Instrum. (IF 1.366) Pub Date : 2020-05-20
    N.S. Phan, E.R. Lee and D. Loomba

    Images of resolved 5.9 keV electron tracks produced from 55 Fe X-ray interactions are presented for the first time using an optical readout time projection chamber (TPC) . The corresponding energy spectra are also shown, with the FWHM energy resolution in the 30–40% range depending on gas pressure and gain. These tracks were produced in low pressure carbon tetrafluoride (CF 4 ) gas, and imaged with

    更新日期:2020-05-20
  • Effects of electromagnetic and magnetic stresses on zebrafish samples
    J. Instrum. (IF 1.366) Pub Date : 2020-05-20
    V. Nassisi, L. Velardi, A. Mazzei, F. Paladini, F. Nassisi, G. Del Vecchio, L. Monteduro, A. Barca, P. Alifano and T. Verri

    In this work, zebrafish ( Danio rerio ) embryos were subjected to different physical stresses, consisting of a static and two low frequency magnetic fields, and two radio frequencies. Specifically, embryos were exposed to static (Bo, 0 Hz), very low frequency (VLF, 0.2 Hz), low frequency (LF, 270 kHz), very high frequency (VHF, 100 MHz) and ultra-high frequency (UHF, 900 MHz) magnetic field irradiations

    更新日期:2020-05-20
  • Developments and improvements of radiopure ZnWO 4 anisotropic scintillators
    J. Instrum. (IF 1.366) Pub Date : 2020-05-20
    P. Belli, R. Bernabei, F. Cappella, V. Caracciolo, R. Cerulli, N. Cherubini, F.A. Danevich, A. Incicchitti, D.V. Kasperovych, V. Merlo, E. Piccinelli, O.G. Polischuk and V.I. Tretyak

    The ZnWO 4 is an anisotropic crystal scintillator; for its peculiar characteristics, it is a very promising detector to exploit the so-called directionality approach in the investigation of those Dark Matter (DM) candidates inducing nuclear recoils. Recently, in the framework of the ADAMO project, an R&D to develop high quality and ultra-radiopure ZnWO 4 crystal scintillators has been carried out.

    更新日期:2020-05-20
  • Development of a wide-range neutron flux monitoring system in EAST
    J. Instrum. (IF 1.366) Pub Date : 2020-05-20
    G.Q. Zhong, K. Li, L.Q. Hu, H.R. Cao, R.J. Zhou, S.Y. Lin, B. Hong, Z.P. Huo, H. Zhang, M. Xiao, M.J. Zhou, R.X. Zhang, L.S. Huang, J. Huang, T.S. Fan and Y.M. Zhang

    A wide measurement range for a neutron flux monitoring (NFM) system is developed in the Experimental Advanced Superconducting Tokamak (EAST) for fusion neutron yield measurement, comprising an 3 He proportional counter, a 235 U fission chamber (FC), and a wide dynamic range signal-processing circuit. Two high-sensitivity 3 He detectors operate in counting mode, which is suitable for low neutron yield

    更新日期:2020-05-20
  • Study on saturation of SiPM for scintillator calorimeter using UV laser
    J. Instrum. (IF 1.366) Pub Date : 2020-05-19
    N. Tsuji, W. Ootani, L. Liu, K. Yoshioka, Y. Morita and M. Gonokami

    The saturation of SiPMs is a potential issue for scintillator calorimeters with SiPM readout. When a large number of particles hit a scintillator, the SiPM output can be saturated due to the limited number of pixels. In order to convert the SiPM output into the number of incident photons correctly, it is necessary to understand the behavior of the SiPM saturation. The saturation curve is usually measured

    更新日期:2020-05-19
  • Methods of signal processing and cosmic muon calibration for the BM@N sampling lead/scintillator hadron calorimeter
    J. Instrum. (IF 1.366) Pub Date : 2020-05-19
    S. Morozov, D. Finogeev, M. Golubeva, F. Guber, A. Ivashkin, A. Izvestnyy, M. Kapishin, N. Karpushkin and O. Petukhov

    Recently developed new forward lead/scintillator sampling hadron calorimeters with transverse and longitudinal segmentation will be used in the upgraded BM@N (Baryonic Matter at Nuclotron) experiment at the Nuclotron-NICA acceleration complex in JINR (Dubna). These calorimeters are very important for measurements of centrality and the reaction plane orientation in heavy-ion collisions. Digitizing the

    更新日期:2020-05-19
  • The PPS tracking system: performance in LHC Run2 and prospects for LHC Run3
    J. Instrum. (IF 1.366) Pub Date : 2020-05-19
    M.M. Obertino

    The PPS (Precision Proton Spectrometer) system consists of tracking and timing detectors installed along the LHC beam line between 210 and 220 m from the interaction point on both sides of the CMS experiment. The aim of the apparatus is to measure with high precision the position, direction and time-of-flight of protons which emerge intact from the pp collision. Fully integrated in the CMS data acquisition

    更新日期:2020-05-19
  • Surface radiation of a charged particle bunch passing through a corrugated surface with a relatively small period
    J. Instrum. (IF 1.366) Pub Date : 2020-05-19
    E.S. Simakov and A.V. Tyukhtin

    We investigate radiation of a charged particle bunch moving through a corrugated planar conductive surface. It is assumed that the corrugation period and depth are much less than the wavelengths under consideration. In this case, the corrugated structure can be replaced with some smooth surface on which the so-called equivalent boundary conditions (EBC) are fulfilled. Using the EBC method we obtain

    更新日期:2020-05-19
  • Study and characterization of WLS for ARAPUCA to DUNE experiment
    J. Instrum. (IF 1.366) Pub Date : 2020-05-19
    M.C. Queiroga Bazetto, V.L. Pimentel, A.A. Machado and E. Segreto

    The photon detection system of the far detector of the Deep Underground Neutrino Experiment (DUNE) will collect liquid argon scintillation photons with an array of modules whose working principle is based on the ARAPUCA technology. These devices acting as light traps are able to convert VUV scintillation photons into visible ones and capture them inside a reflective cavity observed by an array of SiPMs

    更新日期:2020-05-19
  • Study of silicon sensors for precise timing measurement
    J. Instrum. (IF 1.366) Pub Date : 2020-05-19
    Y. Deguchi, K. Kawagoe, R. Mori, E. Mestre, T. Suehara and T. Yoshioka

    Silicon sensors with high timing resolution can help particle identification in the International Linear Collider (ILC). We are studying Low Gain Avalanche Detectors (LGADs) as a sensor with high timing resolution. As a step to develop LGADs we are now characterizing Avalanche Photo Diodes (APDs), which have similar multiplication structure as LGADs. Particles from radioisotopes are used for studies

    更新日期:2020-05-19
  • Ion bursts and multi-electron population in expanding laser-produced plasma
    J. Instrum. (IF 1.366) Pub Date : 2020-05-19
    J. Krása, D. Klír, M. Krupka, J. Cikhardt, M. Pfeifer, T. Pisarczyk, J. Dostál, K. Řezáč, R. Dudžák, T. Burian, Z. Rusiniak, T. Chodukowski, M. Krůs and M. Kálal

    We present an experimental study of emission of relativistic electrons, fast ions and DD-fusion neutrons produced by interaction of sub-nanosecond laser radiation with solid targets performed at the PALS facility. Measurements of electron density close to the target surface using the femtosecond interferometry, energy distribution functions of hot electrons far from the target, and time-of-flight spectra

    更新日期:2020-05-19
  • Development of PC based automation of ion beam analysis and ion implantation experiments
    J. Instrum. (IF 1.366) Pub Date : 2020-05-18
    K. Suresh, J. Navas, B. Sundaravel, J. Pradhan, C. David, R. Govindaraj, M. Kamruddin and S.K. Albert

    This paper presents the details of a personal computer (PC) based automation of ion beam analysis and ion implantation experimental setup that has been developed and implemented in a 1.7 MV Tandetron accelerator. Hardware and software of the PC automated system were designed to automate multiple sample ion implantation, standard Rutherford Backscattering spectrometry (RBS), and High resolution Rutherford

    更新日期:2020-05-18
  • First liquid argon test of the X-ARAPUCA
    J. Instrum. (IF 1.366) Pub Date : 2020-05-18
    E. Segreto, A.A. Machado, A. Fauth, R.R. Ramos, G. de Souza, H.V. Souza, V.L. Pimentel, M.C. Queiroga Bazetto and M.A. Ayala-Torres

    The X-ARAPUCA is a device for the detection of scintillation light in liquid argon and represents an evolution of the ARAPUCA design, with an increased collection efficiency and a simpler design. The first liquid argon test of an X-ARAPUCA prototype has been performed in the cryogenic facility of the Laboratáorio de Léptons da UNCIAMP and showed a detection efficiency of 3.5%± 0.5%, in line with the

    更新日期:2020-05-18
  • Study of Li diffusion in thin film of Re annealed at high temperatures
    J. Instrum. (IF 1.366) Pub Date : 2020-05-18
    A. Cannavò, J. Vacík, V. Hnatowicz, G. Ceccio, P. Horák, V. Lavrentiev, U. Köster and G. Pasold

    Depth profiles of 6 Li implanted into high-melting point rhenium refractory metal has been measured for as-implanted, as well as thermally annealed samples using a non-destructive Thermal Neutron Depth Profiling technique at the LWR-15 research reactor in Řež. The Gaussian-like shape, typical for as-implanted Li-depth profile, is preserved after the thermal annealing at high temperature demonstrating

    更新日期:2020-05-18
  • AI-optimized detector design for the future Electron-Ion Collider: the dual-radiator RICH case
    J. Instrum. (IF 1.366) Pub Date : 2020-05-18
    E. Cisbani, A. Del Dotto, C. Fanelli, M. Williams, M. Alfred, F. Barbosa, L. Barion, V. Berdnikov, W. Brooks, T. Cao, M. Contalbrigo, S. Danagoulian, A. Datta, M. Demarteau, A. Denisov, M. Diefenthaler, A. Durum, D. Fields, Y. Furletova, C. Gleason, M. Grosse-Perdekamp, M. Hattawy, X. He, H. van Hecke, D. Higinbotham, T. Horn, C. Hyde, Y. Ilieva, G. Kalicy, A. Kebede, B. Kim, M. Liu, J. McKisson, R

    Advanced detector R&D requires performing computationally intensive and detailed simulations as part of the detector-design optimization process. We propose a general approach to this process based on Bayesian optimization and machine learning that encodes detector requirements. As a case study, we focus on the design of the dual-radiator Ring Imaging Cherenkov (dRICH) detector under development as

    更新日期:2020-05-18
  • Excitation module for orthogonal fundamental mode fluxgate sensor
    J. Instrum. (IF 1.366) Pub Date : 2020-05-17
    S.X. Song, M. Deng, K. Chen, Z.Z. Yuan, Z.F. Xu and Q.S. Zhang

    A fluxgate is a device that has important applications in weak magnetic field measurements. Compared with the second harmonic mode, the orthogonal fundamental mode fluxgate exhibits a better performance in terms of lower noise and wider bandwidth, making it popular among researchers in this field. An amorphous wire is a vital part of any orthogonal fundamental mode fluxgate, and its excitation parameters

    更新日期:2020-05-17
  • Radiation of charge moving through a dielectric spherical target: ray optics and aperture methods
    J. Instrum. (IF 1.366) Pub Date : 2020-05-17
    A.V. Tyukhtin, E.S. Belonogaya, S.N. Galyamin and V.V. Vorobev

    Radiation of charged particles moving in the presence of dielectric targets is of significant interest for various applications in the accelerator and beam physics. The size of these targets is typically much larger than the wavelengths under consideration. This fact gives us an obvious small parameter of the problem and allows developing approximate methods for analysis. We develop two methods, which

    更新日期:2020-05-17
  • Design and study of a continuous wave RFQ for the BISOL high intensity deuteron driver linac
    J. Instrum. (IF 1.366) Pub Date : 2020-05-17
    H.P. Li, Z. Wang, Y.R. Lu, K. Zhu, Q.Y. Tan, S. Liu and M.Y. Han

    A high intensity four-vane continue wave (cw) RFQ for the Beijing Isotope Separation On-Line (BISOL) high intensity deuteron driver linac has been designed. This RFQ will accelerate the 25 mA cw deuteron beam the 3.0 MeV with an operating frequency of 162.5 MHz. Three beam dynamics design schemes based on different strategies have been proposed and detailed comparisons, including tolerance study and

    更新日期:2020-05-17
  • Measurement of charge deposition from heavy ions with the charge integrating JUNGFRAU detector
    J. Instrum. (IF 1.366) Pub Date : 2020-05-17
    E. Fröjdh, S.P. George, S. Kodaira, C. Lopez-Cuenca, A. Mozzanica, L.S. Pinsky, S. Redford and B. Schmitt

    Measurements of mixed radiation fields are challenging, partly due to the high demands on dynamic range and large energy depositions from for example heavy ions. We show that the JUNGFRAU detector developed for photon science at free electron lasers is capable of accurately measuring the energy deposition of four different ion species from He 230 MeV/A with an Linear Energy Transfer (LET) of 3 keV/μm

    更新日期:2020-05-17
  • The laser diode calibration system of the ICARUS T600 detector at FNAL
    J. Instrum. (IF 1.366) Pub Date : 2020-05-17
    M. Bonesini, R. Benocci, R. Bertoni, A. Falcone, R. Mazza, M. Torti, A. Menegolli, G.L. Raselli and M. Rossella

    The ICARUS T600 LAr TPC is the far detector of the Short Baseline Program at FNAL. As it will have to work at shallow depth in the Booster Neutrino Beam, a large cosmic rays background (~ 11 kHz) will be present. To reduce it, precise timing information is needed from the new light detection system, based on 360 large area photomultipliers. For precise time measurements a calibration system based on

    更新日期:2020-05-17
  • Silicon photomultipliers in Very High Energy gamma-ray astrophysics
    J. Instrum. (IF 1.366) Pub Date : 2020-05-14
    D. Guberman and R. Paoletti

    In the last ten years silicon photomultipliers (SiPMs) have gained terrain in experiments and applications in which photomultiplier tubes have been the dominant photosensors during decades. Imaging Atmospheric Cherenkov Telescopes (IACTs) for very high energy (VHE, E >50 GeV) gamma-ray astronomy are experiencing the same process. Until now FACT was the only IACT using SiPMs. In the Cherenkov Telescope

    更新日期:2020-05-14
  • Investigation of nitrogen enriched silicon for particle detectors
    J. Instrum. (IF 1.366) Pub Date : 2020-05-14
    J.C. Hönig, M. Baselga, M. Centis Vignali, L. Diehl, A. Dierlamm, E. Fretwurst, P. Kaminski, M. Moll, F. Moos, R. Mori, U. Parzefall, G. Pellegrini, J.M. Rafí, J. Schwandt and L. Wiik-Fuchs

    This article explores the viability of nitrogen enriched silicon for particle physics application. For that purpose silicon diodes and strip sensors were produced using high resistivity float zone silicon, diffusion oxygenated float zone silicon, nitrogen enriched float zone silicon and magnetic Czochralski silicon. The article features comparative studies using secondary ion mass spectrometry, electrical

    更新日期:2020-05-14
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