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  • Applications of a remotely controlled robot-car in the TPS tunnel
    J. Instrum. (IF 1.454) Pub Date : 2020-08-05
    T.Y. Lee, B.Y. Chen, T.W. Hsu, B.Y. Huang, W.Y. Lin, Y.C. Lin, Y.C. Yang, J.C. Huang, C.H. Kuo and Y.C. Liu

    A remotely controlled robot-car named "PhotonBot" was developed to undertake inspection of the tunnel of Taiwan Photon Source during its operation. It is equipped with LiDAR to detect obstacles and SLAM, four cameras including a 360 o camera for surveillance, a thermal-imaging system to visualize the temperature distribution and to disclose abnormal hot spots, and a radiation dosimeter to survey the

    更新日期:2020-08-06
  • SciFi, the new Tracker of the LHCb experiment
    J. Instrum. (IF 1.454) Pub Date : 2020-08-04
    A. Massafferri

    The LHCb Collaboration is currently in the final stage of constructing an upgraded detector that will allow the experiment to operate at higher luminosities and with a triggerless readout. The main tracking stations—which originally were subdivided in an Inner Tracker made from silicon strip sensors and an Outer Tracker built from straw-tubes—are being replaced by a single tracking detector, the Scintillating

    更新日期:2020-08-05
  • Silicon pixel sensor R&D for the CLIC tracking detector
    J. Instrum. (IF 1.454) Pub Date : 2020-08-04
    J. Kröger

    The physics aims at the proposed high-energy e ^+ e ^− collider CLIC pose challenging demands on the performance of the detector system. Precise hit-time tagging, an excellent spatial resolutions, and a low mass are required for the vertex and tracking detectors. To meet these requirements, an all-silicon vertex and tracking detector system is foreseen, for which a broad R&D programme on a variety

    更新日期:2020-08-05
  • Preliminary results from the cosmic data taking of the BESIII cylindrical GEM detectors
    J. Instrum. (IF 1.454) Pub Date : 2020-08-04
    R. Farinelli, A. Amoroso, R. Baldini Ferroli, I. Balossino, M. Bertani, D. Bettoni, A. Bortone, A. Calcaterra, S. Cerioni, W. Cheng, G. Cibinetto, A. Cotta Ramusino, F. Cossio, M. Da Rocha Rolo, F. De Mori, M. Destefanis, J. Dong, F. Evangelisti, R. Farinelli, L. Fava, G. Felici, I. Garzia, M. Gatta, G. Giraudo, S. Gramigna, M. Greco, A.Q. Guo, Z. Huang, Y.R. Hou, W. Imoehl, L. Lavezzi, X.L. Lu, M

    BESIII is a multipurpose spectrometer optimized for physics in the tau-charm energy region. Both the detector and the accelerator are undergoing an upgrade program, that will allow BESIII to run for 5 to 10 more years. A major upgrade is the replacement of the inner drift chamber with a new detector based on Cylindrical Gas Electron Multipliers to improve both the secondary vertex reconstruction and

    更新日期:2020-08-05
  • The ENUBET positron tagger prototype: construction and testbeam performance
    J. Instrum. (IF 1.454) Pub Date : 2020-08-04
    F. Acerbi, M. Bonesini, F. Bramati, A. Branca, C. Brizzolari, G. Brunetti, S. Capelli, S. Carturan, M.G. Catanesi, S. Cecchini, F. Cindolo, G. Collazuol, E. Conti, F. Dal Corso, C. Delogu, G. De Rosa, A. Falcone, A. Gola, C. Jollet, B. Kliček, Y. Kudenko, M. Laveder, A. Longhin, L. Ludovici, E. Lutsenko, L. Magaletti, G. Mandrioli, A. Margotti, V. Mascagna, N. Mauri, L. Meazza, A. Meregaglia, M. Mezzetto

    A prototype for the instrumented decay tunnel of ENUBET was tested in 2018 at the CERN East Area facility with charged particles up to 5 GeV . This detector is a longitudinal sampling calorimeter with lateral scintillation light readout. The calorimeter was equipped by an additional " t 0 -layer" for timing and photon discrimination. The performance of this detector in terms of electron energy resolution

    更新日期:2020-08-05
  • Optimization and first tests of the experimental setup to investigate the double-polarized DD-fusion reactions
    J. Instrum. (IF 1.454) Pub Date : 2020-08-03
    A. Solovev, A. Andreyanov, L. Barion, G. Ciullo, R. Engels, V. Fotyev, K. Ivshin, L. Kochenda, P. Kravchenko, P. Kravtsov, V. Larionov, A. Rozhdestvensky, S. Sherman, I. Solovyev, V. Trofimov, A. Vasilyev and M. Vznuzdaev

    The study of DD reactions, especially with polarized reactants, helps for better understanding of the processes taking place in nuclear astrophysics and fusion reactors. At PNPI Gatchina, Russia, the PolFusion experiment with crossing of two polarized beams, i.e. a deuteron and a deuterium beam, is able to measure angular distributions of the differential cross section and, therefore, the spin-correlations

    更新日期:2020-08-04
  • Novel triple-GEM mechanical design for the CMS-ME0 detector and its preliminary performance
    J. Instrum. (IF 1.454) Pub Date : 2020-08-02
    F. Fallavollita

    In the framework of the High-Luminosity Large Hadron Collider project (HL-LHC), the LHC experiments will require upgrades to their detectors to cope with the new accelerator performance. The upgrade of the CMS Muon Spectrometer foresees the installation of three new muon stations based on the Gas Electron Multiplier (GEM) technology, referred to as GE1/1, GE2/1 and ME0 detectors. While the installation

    更新日期:2020-08-03
  • Ce doped garnet structure crystalline scintillation materials for HEP instrumentation
    J. Instrum. (IF 1.454) Pub Date : 2020-08-02
    M. Korzhik

    To date, more than 200 scintillation materials have been developed, however only a few of them are widely used for detectors design and construction. A general trend is to use for detectors the elements produced from the selected top-quality grade scintillation materials instead of expensive novel chemically not stable halides. Another trend, which came in the last few years, is to apply new achievements

    更新日期:2020-08-03
  • Design of prototype Front-End Electronics for the Gamma-Gamma collider
    J. Instrum. (IF 1.454) Pub Date : 2020-07-30
    D. Zhu, Z. Shen, Y. Shui, C. Feng and S. Liu

    The Gamma-Gamma collider is a scientific facility proposed in China to observe two unique interactions at the center-of-mass energy of 1–2 MeV, namely γγ scattering and electron-positron pairs. In the experiment, two γ beams generated by the Compton back-scattering of high-energy electron beams (~200 MeV) and high-intensity laser beams will collide at the interaction point, and the products will be

    更新日期:2020-07-31
  • New 3D fine-grained scintillation detector for the T2K experiment
    J. Instrum. (IF 1.454) Pub Date : 2020-07-30
    S. Fedotov

    The main goal of the T2K long-baseline neutrino experiment is the precise measurement of the parameters of neutrino oscillation and the search for CP-violation in the lepton sector. In 2017, the T2K collaboration launched the Near Detector Upgrade project. This upgrade aims to reduce the systematic errors of the oscillation parameters from 6–7% to 3–4%. In order to accomplish such goal, ND280 Upgrade

    更新日期:2020-07-31
  • Development of a new type of hybrid photo-detector involving photocathode, scintillator, and silicon photomultiplier
    J. Instrum. (IF 1.454) Pub Date : 2020-07-29
    J.W. Song, F. Anjum, H.J. Kim and J. Lee

    We proposed a new type of hybrid photo-detector that consists of a photocathode, an electrode, a scintillator, and a silicon photomultiplier in a vacuum tube. This type of photo-detector with a large area of photocathode could be utilized in photo-detector array for neutrino detection. Photons incident onto the photocathode are converted to photo-electrons. Due to the electric field between photocathode

    更新日期:2020-07-30
  • The STAR Detector Upgrades for the BES-II and at Forward Rapidity
    J. Instrum. (IF 1.454) Pub Date : 2020-07-26
    C. Yang and Q. Yang

    The Beam Energy Scan Phase II program (BES-II) at the Relativistic Heavy Ion Collider (RHIC) is examining the center-of-mass collision energy region from 7.7 GeV to 19.6 GeV which was determined from the results of BES-I. Key measurements such as the net proton kurtosis, the directed flow and the dilepton production are possible during BES-II with an order of magnitude better statistics due to the

    更新日期:2020-07-27
  • Performance of the Belle II aerogel-based ring-imaging Cherenkov counter system in SuperKEKB 2019 phase 3 operation
    J. Instrum. (IF 1.454) Pub Date : 2020-07-26
    Y.-T. Lai, I. Adachi, L. Burmistrov, K. Furui, T. Iijima, S. Iwata, R. Giordano, H. Kakuno, G. Karyan, H. Kawai, T. Kawasaki, H. Kindo, H. Kitamura, M. Kobayashi, T. Kohriki, T. Konno, S. Korpar, P. Križan, T. Kumita, K. Kuze, G. Nazaryan, S. Nishida, M. Nishimura, K. Ogawa, S. Ogawa, R. Pestotnik, L. Šantelj, M. Shoji, T. Sumiyoshi, M. Tabata, M. Tsurufuji, E. Waheed, M. Yonenaga and Y. Yusa

    In the Belle II experiment, an aerogel-based proximity focusing ring-imaging Cherenkov (ARICH) counter is used for charged particle identification (PID) in the forward end-cap region. The goal is to separate kaons from pions at above 4σ significance level for momenta up to 4 GeV/ c , which is critical for the measurements of rare B decays and CP violation in B decays. Chrerenkov photons are emitted

    更新日期:2020-07-27
  • A self-monitoring precision calibration light source for large-volume neutrino telescopes
    J. Instrum. (IF 1.454) Pub Date : 2020-07-26
    F. Henningsen, M. Böhmer, A. Gärtner, L. Geilen, R. Gernhäuser, H. Heggen, K. Holzapfel, C. Fruck, L. Papp, I.C. Rea, E. Resconi, F. Schmuckermaier, C. Spannfellner and M. Traxler

    With the rise of neutrino astronomy using large-volume detector arrays, calibration improvements of optical media and photosensors have emerged as significant means to reduce detector systematics. To improve understanding of the detector volume and its instrumentation, we developed an absolutely-calibrated, self-monitoring, isotropic, nanosecond, high-intensity calibration light source called "Precision

    更新日期:2020-07-27
  • Heat radiation reduction in cryostats with multilayer insulation technique
    J. Instrum. (IF 1.454) Pub Date : 2020-07-26
    D. Singh, A. Pandey, M.K. Singh, L. Singh and V. Singh

    Multilayer insulation (MLI) is an important technique for the reduction of radiation heat load in cryostats. The present work is focused on investigation for the selection of suitable reflective layer and spacer material in MLI systems. In our analysis, we have selected perforated double-Aluminized Mylar (DAM) with Dacron, unperforated DAM with Silk-net and perforated DAM with Glass-tissue for their

    更新日期:2020-07-27
  • New challenges for distributed computing at the CMS experiment
    J. Instrum. (IF 1.454) Pub Date : 2020-07-23
    N. Krammer

    The Large Hadron Collider (LHC) experiments soon step into the next period of run-3 data taking with an increased data rate and high pileup requiring an excellent working computing infrastructure. In the future High-Luminosity LHC (HL-LHC) data-taking period, the compute, storage and network facilities have to be further extended by large factors and flexible and sophisticated computing models are

    更新日期:2020-07-24
  • Numerical study of track distortion in the Large Prototype TPC with end-plate based on bulk Micromegas
    J. Instrum. (IF 1.454) Pub Date : 2020-07-23
    D.S. Bhattacharya, P. Bhattacharya, S. Mukhopadhyay, N. Majumdar, S. Sarkar, S. Bhattacharya, P. Colas, D. Attié, S. Ganjour and A. Bhattacharya

    The present R&D activities for the International Large Detector Time Projection Chamber (ILD-TPC) concern the adoption of the micro-pattern devices for the gaseous amplification stage. Seven Micromegas modules which are commissioned on the end-plate of a Large Prototype TPC (LPTPC) at DESY, were tested with a 5 GeV electron beam, under a 1 T magnetic field. During experiments, reduced signal sensitivity

    更新日期:2020-07-24
  • CYGNO: a gaseous TPC with optical readout for dark matter directional search
    J. Instrum. (IF 1.454) Pub Date : 2020-07-23
    E. Baracchini, L. Benussi, S. Bianco, C. Capoccia, M. Caponero, G. Cavoto, A. Cortez, I.A. Costa, E. Di Marco, G. D'Imperio, G. Dho, F. Iacoangeli, G. Maccarrone, M. Marafini, G. Mazzitelli, A. Messina, R.A. Nobrega, A. Orlandi, E. Paoletti, L. Passamonti, F. Petrucci, D. Piccolo, D. Pierluigi, D. Pinci, F. Renga, F. Rosatelli, A. Russo, G. Saviano and S. Tomassini

    The CYGNO project has the goal to use a gaseous TPC with optical readout to detect dark matter and solar neutrinos with low energy threshold and directionality. The CYGNO demonstrator will consist of 1 m 3 volume filled with He:CF 4 gas mixture at atmospheric pressure. Optical readout with high granularity CMOS sensors, combined with fast light detectors, will provide a detailed reconstruction of the

    更新日期:2020-07-24
  • Low background scintillators to investigate rare processes
    J. Instrum. (IF 1.454) Pub Date : 2020-07-23
    A.S. Barabash, P. Belli, R. Bernabei, F. Cappella, V. Caracciolo, R. Cerulli, F.A. Danevich, A. Di Marco, A. Incicchitti, D.V. Kasperovych, V.V. Kobychev, M. Laubenstein, V. Merlo, F. Montecchia, O.G. Polischuk, D.V. Poda, V.I. Tretyak and V.N. Shlegel

    Many developments, researches on innovative materials and purification techniques have offered a wide set of inorganic scintillators to investigate many processes; further developments are still in progress. In particular, efforts to realize very low background detectors have opened their effective application to the search of rare processes deep underground. Several cases will be outlined offering—to

    更新日期:2020-07-24
  • Muon radiography employing the DIRC principle for density change measurements under volcanoes and fluid reservoirs
    J. Instrum. (IF 1.454) Pub Date : 2020-07-22
    K. Föhl, T. Dahm, M. Düren, F. Goldenbaum, D. Grzonka, J. Ritman and T. Walter

    Mapping the density distribution and monitoring density changes under volcanoes and geological reservoirs is a major challenge in geology and volcanology. Muon radiography has a high potential to advance this field, but often there are no inexpensive high-end detectors available that are suitable for field installations. A DIRC-type Cherenkov detector as a muon camera has a small dimension and is suited

    更新日期:2020-07-23
  • Design study of a "scintronic" crystal targeting tens of picoseconds time resolution for gamma ray imaging: the ClearMind detector
    J. Instrum. (IF 1.454) Pub Date : 2020-07-22
    D. Yvon, V. Sharyy, M. Follin, J.-P. Bard, D. Breton, J. Maalmi, C. Morel and E. Delagnes

    We describe the concept of a new gamma ray "scintronic" detector targeting a time resolution of the order of 25 ps FWHM, with millimetric volume reconstruction and high detection efficiency. Its design consists of a monolithic large PbWO 4 scintillating crystal with an efficient photocathode directly deposited on it. With an index of refraction higher for the photocathode than for the crystal, this

    更新日期:2020-07-23
  • A facility for mass production of ultra-pure NaI powder for the COSINE-200 experiment
    J. Instrum. (IF 1.454) Pub Date : 2020-07-22
    K. Shin, J.S. Choe, O. Gileva, A. Iltis, Y.D. Kim, C.H. Lee, H.S. Lee, M.H. Lee and H.K. Park

    COSINE-200 is the next phase of the ongoing COSINE-100 experiment. The main purpose of the experiment is the performance of an unambiguous verification of the annual modulation signals observed by the DAMA experiment. The success of the experiment critically depends on the production of a 200 kg array of ultra-pure NaI(Tl) crystal detectors that have lower backgrounds than the DAMA crystals. The purification

    更新日期:2020-07-23
  • Purification and recovery of 100 MoO 3 in crystal production for AMoRE experiment
    J. Instrum. (IF 1.454) Pub Date : 2020-07-22
    O. Gileva, J.S. Choe, H.J. Kim, Y.D. Kim, M.H. Lee, H.K. Park and K.A. Shin

    The AMoRE collaboration searches for the neutrinoless double-beta decay of 100 Mo with ultra-radiopure molybdate crystals operated as low-temperature scintillating bolometers. For such a rare event search experiment, the techniques for investigating and reducing radioactive background contaminants in detector materials are extremely crucial. This paper discusses techniques for deep purification of

    更新日期:2020-07-23
  • Growth and development of pure Li 2 MoO 4 crystals for rare event experiment at CUP
    J. Instrum. (IF 1.454) Pub Date : 2020-07-22
    J.K. Son, J.S. Choe, O. Gileva, I.S. Hahn, W.G. Kang, D.Y. Kim, G.W. Kim, H.J. Kim, Y.D. Kim, C.H. Lee, E.K. Lee, M.H. Lee, D.S. Leonard, H.K. Park, S.Y. Park, S.J. Ra and K.A. Shin

    The Center for Underground Physics (CUP) of the Institute for Basic Science (IBS) is searching for the neutrinoless double-beta decay (0νββ) of 100 Mo in the molybdate crystals of the AMoRE experiment. The experiment requires pure scintillation crystals to minimize internal backgrounds that can affect the 0νββ signal. For the last few years, we have been growing and studying Li 2 MoO 4 crystals in

    更新日期:2020-07-23
  • A cosmic ray imaging system based on plastic scintillator detector with SiPM readout
    J. Instrum. (IF 1.454) Pub Date : 2020-07-22
    Zheng Liang, Tianqi Hu, Xin Li, Yitao Wu, Cheng Li and Zebo Tang

    Cosmic ray muons can be used to detect materials which traditional methods cannot due to its high penetration ability. It's able to image 3-dimension density distribution of target by measuring scattering angle of muon tracks. We designed a muon imaging system aiming at the density reconstruction of various materials by measuring the scattering angle and momentum of cosmic ray muon. In addition, a

    更新日期:2020-07-23
  • An automatic system for the wiring of Drift Chambers for modern high intensity and high precision particle physics experiments
    J. Instrum. (IF 1.454) Pub Date : 2020-07-22
    G. Chiarello, A. M. Baldini, G. Cavoto, F. Cei, M. Chiappini, A. Corvaglia, M. Francesconi, L. Galli, F. Grancagnolo, M. Grassi, M. Hildebrandt, M. Meucci, A. Miccoli, D. Nicoló, A. Papa, M. Panareo, F. Raffaelli, F. Renga, G. Signorelli, G.F. Tassielli and C. Voena

    Tracking systems for modern particle physics experiments, both for the search of extremely rare processes, which require high momentum resolutions in ranges dominated by multiple scattering, and for the next generation of high luminosity lepton colliders, which require large active volumes and high granularity, make use of light drift chambers able to withstand high rates and, therefore, made of large

    更新日期:2020-07-23
  • Space charge, nonlinear resonances, and beam loss
    J. Instrum. (IF 1.454) Pub Date : 2020-07-21
    G. Franchetti

    The effect of space charge in bunches stored for many synchrotron oscillations combined with the nonlinear resonances in a storage ring may create a particle diffusion to large amplitudes and eventually create unwanted beam loss. We review and discuss the mechanism which creates beam loss with the focus on how to estimate the number of particles that will be crossed by the stable fixed lines generated

    更新日期:2020-07-22
  • Beam commissioning and beam loss control for CSNS accelerators
    J. Instrum. (IF 1.454) Pub Date : 2020-07-21
    S. Xu, H. Liu, J. Peng, J. Chen, L. Huang, M. Huang, M. Li, X. Lu, X. Luo, Y. Li, Y. An, Y. Yuan, Z. Li and S. Wang

    The China Spallation Neutron Source (CSNS) accelerators consist of an 80 MeV H − linac and a 1.6 GeV proton rapid cycling synchrotron (RCS), which provides 1.6 GeV proton beam to the target at a repetition rate of 25 Hz. The beam commissioning of CSNS accelerators had been started since April 2017, and to the end of February 2020, the CSNS reached the design beam power of 100 kW. The most important

    更新日期:2020-07-22
  • Choice of Linac parameters to minimize the space-charge effects
    J. Instrum. (IF 1.454) Pub Date : 2020-07-21
    M. Eshraqi and J.M. Lagniel

    In high-intensity linear accelerators, the tune spreads induced by the space-charge forces in the radial and longitudinal planes are key parameters for halo formation and beam losses. For matched beams, they are the parameters governing the number of resonances (including coupling resonances), which affect the beam and determine the respective sizes of the stable and halo areas in phase space. The

    更新日期:2020-07-22
  • Advances in the simulation of space-charge effects
    J. Instrum. (IF 1.454) Pub Date : 2020-07-21
    J. Qiang

    The nonlinear space-charge effects are an important topic in high intensity accelerator beam dynamics and have been extensively studied using macroparticle tracking simulations. In this paper, we report on recent advances in the simulation of space-charge effects using a symplectic multiparticle space-charge model. The transverse space-charge limit was explored for a periodic focusing and defocusing

    更新日期:2020-07-22
  • Coherent and incoherent space-charge effects in high-intensity hadron rings
    J. Instrum. (IF 1.454) Pub Date : 2020-07-21
    H. Okamoto, M. Aoki, C. Ichikawa, K. Kojima, T. Kurauchi and Y. Yamane

    A brief overview is given of the recent work done by the beam-physics group of Hiroshima University on resonant beam instabilities in high-intensity hadron rings. Emphasis is placed upon two essentially different instability mechanisms, namely, coherent and incoherent resonances that occur respectively in the beam core and in the beam tail. On the basis of a semi-empirical coherent resonance condition

    更新日期:2020-07-22
  • Highlights from the first beam commissioning stage at ESS for its ion source and low energy beam transport
    J. Instrum. (IF 1.454) Pub Date : 2020-07-21
    R. Miyamoto, C.S. Derrez, E.M. Donegani, M. Eshraqi, B. Gålnander, H. Hassanzadegan, E. Laface, Y. Levinsen, N. Milas, M. Muñoz, E. Nilsson, C. Plostinar, A.G. Sosa, R. Tarkeshian and C. Thomas

    The proton linac of the European Spallation Source, under construction in Lund, Sweden, had beam commissioning of its ion source (IS) and the following low energy beam transport (LEBT) at their final locations from September 2018 to July 2019. This was first of several beam commissioning stages for the linac of ESS, towards the start of the user program in 2023. This paper presents highlights of characterizations

    更新日期:2020-07-22
  • Editorial announcements & information—ICFA Beam Dynamics Newsletter No. 79
    J. Instrum. (IF 1.454) Pub Date : 2020-07-21
    J. Qiang and I. Hofmann

    This is a general information article of the ICFA Beam Dynamics Newsletter No. 79. It contains two forewords from the Editor-in-Chief and the issue editor, a workshop and conference report section, a recent Ph.D. thesis section, a forthcoming beam dynamics events section, and a section of announcements from the beam dynamics panel.

    更新日期:2020-07-22
  • J-PARC 3-GeV RCS: 1-MW beam operation and beyond
    J. Instrum. (IF 1.454) Pub Date : 2020-07-21
    H. Hotchi, H. Harada, N. Hayashi, M. Kinsho, K. Okabe, P.K. Saha, Y. Shobuda, F. Tamura, K. Yamamoto, M. Yamamoto and M. Yoshimoto

    The J-PARC 3-GeV rapid cycling synchrotron (RCS) has recently achieved a 1-MW beam operation with considerably low fractional beam loss of a couple of 10 −3 as a result of continuous efforts iterating experiments and numerical simulations. This success of the 1-MW beam operation opened a door to further beam power ramp-up beyond 1 MW; we are now promoting 1.2~1.5-MW-equivalent high-intensity beam tests

    更新日期:2020-07-22
  • Dynamics near equilibrium for intense beams in a nonlinear integrable focusing channel
    J. Instrum. (IF 1.454) Pub Date : 2020-07-21
    C. Mitchell, K. Hwang and R. Ryne

    Accelerator storage ring designs based on nonlinear integrable Hamiltonian systems provide a novel test-bed for studying the interplay between nonlinear dynamics and space charge at high intensity. In this work, the structure of beam Vlasov equilibria is explored for a constant focusing channel based on the nonlinear focusing potential of the Integrable Optics Test Accelerator. The dynamics of the

    更新日期:2020-07-22
  • Revisiting coherent and incoherent resonances with space charge
    J. Instrum. (IF 1.454) Pub Date : 2020-07-21
    I. Hofmann

    The question of interplay of coherent and incoherent space charge driven resonances and of their Landau damping has found some interest in beam dynamics of modern high-intensity synchrotrons. We revisit the theoretical and simulation models describing coherent half-integer parametric resonances, analyze their Landau damping in 2D beams on the basis of simulated tune spectra and conclude that above

    更新日期:2020-07-22
  • Understanding beam distributions in hadron linacs in the presence of space charge
    J. Instrum. (IF 1.454) Pub Date : 2020-07-21
    A. Aleksandrov, S. Cousineau and K. Ruisard

    Space charge forces are a significant contribution to the beam dynamics in high intensity hadron linacs, often causing beam halo that results in beam loss. Currently, there is limited success in modeling beam distributions in high intensity hadron linacs at the RMS level, and no demonstrated capability for measuring or modeling distributions at the level of beam halo. This article discusses the current

    更新日期:2020-07-22
  • Space charge induced losses in the CERN injector complex
    J. Instrum. (IF 1.454) Pub Date : 2020-07-21
    H. Bartosik, F. Asvesta, A. Huschauer, Y. Papaphilippou and F. Schmidt

    Space charge effects in high intensity and high brightness synchrotrons can lead to undesired beam emittance growth, beam halo formation and particle loss. A series of dedicated machine experiments has been performed over the past decade in order to study these effects in the particular regime of long-term beam storage as required for certain applications. This paper gives an overview of the present

    更新日期:2020-07-22
  • Beam quality and beam loss predictions with space charge for SIS100
    J. Instrum. (IF 1.454) Pub Date : 2020-07-21
    V. Kornilov, A. Oeftiger, O. Boine-Frankenheim, V. Chetvertkova, S. Sorge and P. Spiller

    The SIS100 synchrotron as a part of the new FAIR accelerator facility at GSI should be operated at the "space charge limit" for light and heavy-ion beams. Losses due to space charge induced resonance crossing should not exceed a few percent during a full cycle. Detailed magnet field measurements are now available for 72 out of the total 108 main SIS100 dipole magnets. Particle tracking studies including

    更新日期:2020-07-22
  • Mitigation of beam losses in LANSCE linear accelerator
    J. Instrum. (IF 1.454) Pub Date : 2020-07-21
    Y.K. Batygin

    The LANSCE accelerator has been in operation for nearly five decades. During this period, it was transformed from a 0.8 MW average proton beam power machine used primarily for the study of meson physics, to a multi-user high-power facility for fundamental research and national security applications, concurrently delivering beams to five distinct experimental areas. Minimization of beam losses in multi-beam

    更新日期:2020-07-22
  • Hyper-Kamiokande
    J. Instrum. (IF 1.454) Pub Date : 2020-07-20
    Y. Kudenko

    A next generation water Cherenkov detector Hyper-Kamiokande to be built in Japan is described. The main goals of this project include a sensitive measurement of CP violation in neutrino oscillations, a search for proton decay and study of solar, atmospherics and astrophysical neutrinos. Key features of the Hyper-Kamiokande detector are described. The main emphasis is put on large photosensors. The

    更新日期:2020-07-21
  • Calibration of the Yangbajing air-shower core detector
    J. Instrum. (IF 1.454) Pub Date : 2020-07-20
    Y. Zhang, J. Huang, D. Chen, L.M. Zhai, X. Chen, Y.H. Lin and J.H. Fang

    Aiming at the observation of cosmic-ray chemical composition at the `knee' energy region, a new type air-shower core detector (YAC, Yangbajing Air shower Core array) consisting of a lead plate of 3.5 cm thick and a scintillation counter with an area of 0.5 m 2 has been developed and set up at Yangbajing, 4300 m a.s.l. in Tibet, China since 2014. The main purpose of YAC detector is to separate primary

    更新日期:2020-07-21
  • Development of a negative ion micro TPC detector with SF 6 gas for the directional dark matter search
    J. Instrum. (IF 1.454) Pub Date : 2020-07-20
    T. Ikeda, T. Shimada, H. Ishiura, K.D. Nakamura, T. Nakamura and K. Miuchi

    A negative ion micro time projection chamber (NIμTPC) was developed and its performance studied. An NIμTPC is a novel technology that enables the measurement of absolute z coordinates for self-triggering TPCs. This technology provides full-fiducialization analysis, which is not possible with conventional gaseous TPCs, and is useful for directional dark matter searches in terms of background rejection

    更新日期:2020-07-21
  • Scintillation properties of (Zn 0.9 Pb 0.1 )(W 0.9 Mo 0.1 )O 4 and (Zn 0.9 Cd 0.1 )(W 0.9 Mo 0.1 )O 4 mixed crystals
    J. Instrum. (IF 1.454) Pub Date : 2020-07-19
    E.N. Galashov, D.V. Matvienko, V.A. Moskovskyh, B.I. Sikach and B.A. Shwartz

    Scintillation properties of (Zn 0.9 Pb 0.1 )(W 0.9 Mo 0.1 )O 4 and (Zn 0.9 Cd 0.1 )(W 0.9 Mo 0.1 )O 4 mixed crystals with doping of Eu, Sm, Pr, Ce, Sc, Yt and Nb are studied. Measurements of their light yields relative to pure ZnWO 4 } at room temperature, decay times and energy resolutions at 662 keV are presented. Emission spectra are obtained with 239 Pu source of alpha particles.

    更新日期:2020-07-20
  • Evaluation of attenuation rate error for optimisation of skin dosimeter in electron beam therapy
    J. Instrum. (IF 1.454) Pub Date : 2020-07-16
    M.J. Han, S.W. Yang, S.I. Bae, Y.M. Moon, S.U. Heo, C.W. Choi, S.K. Park and J.Y. Kim

    In the field of radiation therapy, the need for a flexible dosimeter that can be applied on the flexor surface for precise measurement of the surface dose is increasing. In particular, electron beam therapy has a shorter treatment depth than photon beam therapy; therefore, the surface dose must be measured accurately. This study investigates attenuation errors in a dosimeter. We demonstrated that the

    更新日期:2020-07-17
  • Simulation of the CsI crystal calorimeter of the detector of charm-tau factory in Novosibirsk
    J. Instrum. (IF 1.454) Pub Date : 2020-07-16
    V.L. Ivanov, I.S. Bulyzhenkov, D.A. Epifanov, A.S. Kuzmin, D.A. Maksimov, S.B. Oreshkin, A.A. Osipov, E.S. Prokhorova, B.A. Shwartz, Yu.V. Usov, V.S. Vorobiev and Yu.V. Yudin

    The paper presents a current status of the simulation of the pure CsI crystal calorimeter of the detector of charm-tau factory project in Novosibirsk. The calorimeter employs the scheme with the crystals focusing at the beams interaction point to obtain the optimal energy and coordinate resolutions. We present a detailed description of the calorimeter design, optimized using the specially developed

    更新日期:2020-07-17
  • The forward TPC system of the NA61/SHINE experiment at CERN: a tandem TPC concept
    J. Instrum. (IF 1.454) Pub Date : 2020-07-16
    B. Rumberger, A. Aduszkiewicz, J. Boissevain, M. Kuich, A. László, Y. Nagai, L. Oláh, P. Podlaski, D. Varga, M. Wensveen and E.D. Zimmerman

    This paper presents the Forward Time Projection Chamber (FTPC) system of the NA61/SHINE experiment at the CERN SPS accelerator. This TPC system applies a novel tandem-TPC design to reduce the background originating from particle tracks not synchronous with the event trigger. The FTPC system is composed of three chambers with alternating drift field directions. The chambers were installed directly along

    更新日期:2020-07-17
  • Beam test characterisation of a Plastic Scintillator Prototype for the space-based cosmic ray experiment HERD
    J. Instrum. (IF 1.454) Pub Date : 2020-07-16
    P.W. Cattaneo, M. Pullia, M.C. Prata, A. Rappoldi and M. Rossella

    The High Energy cosmic-Radiation Detector (HERD) facility is planned to go onboard China's Space Station, planned to be operational starting in around 2025 for about 10 years. The main scientific objectives of HERD are the search for signals of dark matter annihilation products, precise cosmic electron/positron spectrum and measurements of anisotropy up to 10 TeV, precise cosmic ray spectrum and composition

    更新日期:2020-07-17
  • Ion detector for Accelerator Mass Spectrometry based on low-pressure TPC with THGEM readout
    J. Instrum. (IF 1.454) Pub Date : 2020-07-15
    A. Bondar, A. Buzulutskov, E. Frolov, V. Parkhomchuk, A. Petrozhitskiy, T. Shakirova and A. Sokolov

    A new technique for ion identification in Accelerator Mass Spectrometry (AMS) has been proposed by measuring the ion track ranges using a low-pressure TPC. As a proof of principle, a low-pressure TPC with charge readout using a THGEM multiplier was developed. The tracks of alpha particles from various radioactive sources were successfully recorded in the TPC. The track ranges were measured with a high

    更新日期:2020-07-16
  • Development of the Light Collection Module for the Liquid Argon Time Projection Chamber (LArTPC)
    J. Instrum. (IF 1.454) Pub Date : 2020-07-14
    N. Anfimov, R. Berner, I. Butorov, A. Chetverikov, D. Fedoseev, B. Gromov, D. Korablev, I. Kreslo, K. Kuznetsova, A. Olshevskiy, A. Rybnikov, A. Selyunin, V. Sharov, J. Sinclair, S. Sokolov and A. Sotnikov

    A modular liquid argon (LAr) Time Projection Chamber (TPC) with pixelated charge readout is considered as a part of the near-detector for the Deep Underground Neutrino Experiment (DUNE) [1]. Such a TPC is being developed by the ArgonCube collaboration [2]. To provide a trigger for the data acquisition (DAQ) of a neutrino event the LAr scintillation light detection is proposed. The light is a vacuum

    更新日期:2020-07-15
  • A facility to validate photomultipliers for the upgrade of the Pierre Auger Observatory.
    J. Instrum. (IF 1.454) Pub Date : 2020-07-14
    M. Buscemi, M. Aglietta, F.C.T. Barbato, D.L. Bonanno, D.G. Bongiovanni, R. Caruso, R. Colalillo, F. Guarino, F. Longhitano, D. Lo Presti and L. Valore

    The Pierre Auger Observatory is undergoing a major upgrade named AugerPrime with the primary aim to add sensitivity to the mass-composition discrimination of ultrahigh-energy cosmic rays. Two different photomultipliers will be added to each water-Cherenkov station of the surface detector of Observatory. To achieve the scientific goals of AugerPrime these photomultipliers have to ensure a linear response

    更新日期:2020-07-15
  • Beam background evaluation at SuperKEKB and Belle II
    J. Instrum. (IF 1.454) Pub Date : 2020-07-14
    A. Paladino

    The SuperKEKB asymmetric electron-positron collider is the upgrade of the KEKB machine and it is expected to achieve the instantaneous luminosity of 8×10 35 cm −2 s −1 , 40 times higher than the record of KEKB. With the increased luminosity, the beam background is expected to grow significantly with respect to KEKB, leading, among other effects, to possible radiation damage of detector components and

    更新日期:2020-07-15
  • Particle identification with the Cherenkov detector in the VES experiment
    J. Instrum. (IF 1.454) Pub Date : 2020-07-14
    M.S. Kholodenko

    The Cherenkov detector is a key element of the particle identification system in the VES fixed target experiment at IHEP (Protvino). It consists of a 1.6 m R-22 gas radiator and a system of 28 mirrors with photomultiplier tubes (PMTs) as photon detectors. This paper is giving an overview of a description of the detector design, its model used in a simulation, particle identification algorithm, and

    更新日期:2020-07-15
  • Time Projection Chamber as Inner Tracker for Super Charm-Tau factory at BINP
    J. Instrum. (IF 1.454) Pub Date : 2020-07-13
    V.K. Vadakeppattu, A.V. Sokolov, L.I. Shekhtman and T.V. Maltsev

    At present time Budker INP is developing a Super Charm-Tau factory project, which consists of a high-luminosity collider with the luminosity of 10 35 cm −2 s −1 and a universal magnetic detector. The tracking system of the detector will comprise of an Inner Tracker (IT) and a Drift Chamber (DC). One of the options for IT is Time Projection Chamber (TPC). The advantages of the TPC are high spatial resolution

    更新日期:2020-07-14
  • A flexible and scalable software infrastructure and interactive user interfaces for the INFN-LNS accelerators and beamlines
    J. Instrum. (IF 1.454) Pub Date : 2020-07-12
    G. Vecchio, S. Aurnia, S. Cavallaro, B. Diana, E. Furia, S. Pulvirenti and A.D. Russo

    For an integrated and more efficient management of the accelerators and beamlines at Istituto Nazionale di Fisica Nucleare—Laboratori Nazionali del Sud (INFN LNS), we developed a software platform including advanced user interfaces, high efficiency message exchange protocols, robust and redundant client-server infrastructures. We exploited the most innovative software architectures based on open source

    更新日期:2020-07-13
  • Data acquisition system for Belle II electromagnetic calorimeter
    J. Instrum. (IF 1.454) Pub Date : 2020-07-12
    A. Kuzmin, M. Remnev, D. Matvienko, Y. Usov and V. Zhulanov

    Since 2018, the Belle II experiment has been running at KEK, at the SuperKEKB B-factory, with all detector subsystems taking data. One of the important detector systems is an electromagnetic calorimeter (ECL) that includes 8736 counters based on CsI(Tl) scintillation crystals. This report describes the data acquisition (DAQ) system that has been developed for ECL. Front-end electronics of ECL DAQ consist

    更新日期:2020-07-13
  • On the influence of periodicity in the arrangement of crystalline atomic strings upon the spectral and spectral-angular distribution of high-energy positively charged particle radiation in crystal
    J. Instrum. (IF 1.454) Pub Date : 2020-07-12
    I.V. Kyryllin and N.F. Shul'ga

    Spectral and spectral-angular distribution of the radiated energy in case of positron motion in an oriented crystal and in case of positron motion in the field of randomly located atomic strings (random strings approximation) when the angle between particle momentum and crystal axes is less than the critical angle of axial channeling were calculated. Obtained results showed that the peak in the emission

    更新日期:2020-07-13
  • Calorimetry in Particle Physics, and the CMS High-Granularity Calorimeter
    J. Instrum. (IF 1.454) Pub Date : 2020-07-09
    D. Barney

    An overview of electromagnetic and hadronic shower development is presented, including how they lead to the design of modern calorimeters for energy measurements of high-energy particles. The differences between sampling and homogeneous calorimeters are explored, with the pros and cons of each being presented. Some real-world examples are given, focusing on state-of-the-art detectors designed and operating

    更新日期:2020-07-10
  • A method to determine the electric field of liquid argon time projection chambers using a UV laser system and its application in MicroBooNE
    J. Instrum. (IF 1.454) Pub Date : 2020-07-09
    C. Adams, M. Alrashed, R. An, J. Anthony, J. Asaadi, A. Ashkenazi, S. Balasubramanian, B. Baller, C. Barnes, G. Barr, V. Basque, M. Bass, F. Bay, S. Berkman, A. Bhanderi, A. Bhat, M. Bishai, A. Blake, T. Bolton, L. Camilleri, D. Caratelli, I. Caro Terrazas, R. Carr, R. Castillo Fernandez, F. Cavanna, G. Cerati, Y. Chen, E. Church, D. Cianci, E.O. Cohen, J.M. Conrad, M. Convery, L. Cooper-Troendle,

    Liquid argon time projection chambers (LArTPCs) are now a standard detector technology for making accelerator neutrino measurements, due to their high material density, precise tracking, and calorimetric capabilities. An electric field (E-field) is required in such detectors to drift ionization electrons to the anode where they are collected. The E-field of a TPC is often approximated to be uniform

    更新日期:2020-07-10
  • MPD TPC status
    J. Instrum. (IF 1.454) Pub Date : 2020-07-09
    A. Averyanov, A. Bazhazhin, V.F. Chepurnov, V.V. Chepurnov, G. Cheremukhina, S. Chernenko, O. Fateev, Yu. Kiriushin, A. Korotkova, F. Levchanovskiy, J. Lukstins, S. Movchan, A. Pilyar, S. Razin, A. Ribakov, V. Samsonov, S. Vereschagin, Yu. Zanevsky, S. Zaporozhets and V. Zruyev

    In the frame of the JINR scientific program on study of hot and dense baryonic matter a new accelerator complex Ion Collider fAcility (NICA) based on the Nuclotron-M is under realization. Two interaction points are foreseen at NICA for two detectors. One of these detectors, the Multi-Purpose Detector (MPD), is optimized for investigations of heavy-ion collisionsat a luminosity up to 10 27 cm −2 s −1

    更新日期:2020-07-10
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