Author
Sudeb Bhattacharya
Other affiliations: Homi Bhabha National Institute
Bio: Sudeb Bhattacharya is an academic researcher from Saha Institute of Nuclear Physics. The author has contributed to research in topics: MicroMegas detector & Detector. The author has an hindex of 16, co-authored 75 publications receiving 1061 citations. Previous affiliations of Sudeb Bhattacharya include Homi Bhabha National Institute.
Topics: MicroMegas detector, Detector, Neutrino, Bakelite, Neutrino oscillation
Papers published on a yearly basis
Papers
More filters
01 Feb 2010
TL;DR: The International Large Detector (ILD) is a concept for a detector at the International Linear Collider, ILC as discussed by the authors, which will collide electrons and positrons at energies of initially 500 GeV, upgradeable to 1 TeV.
Abstract: The International Large Detector (ILD) is a concept for a detector at the International Linear Collider, ILC. The ILC will collide electrons and positrons at energies of initially 500 GeV, upgradeable to 1 TeV. The ILC has an ambitious physics program, which will extend and complement that of the Large Hadron Collider (LHC). A hallmark of physics at the ILC is precision. The clean initial state and the comparatively benign environment of a lepton collider are ideally suited to high precision measurements. To take full advantage of the physics potential of ILC places great demands on the detector performance. The design of ILD is driven by these requirements. Excellent calorimetry and tracking are combined to obtain the best possible overall event reconstruction, including the capability to reconstruct individual particles within jets for particle ow calorimetry. This requires excellent spatial resolution for all detector systems. A highly granular calorimeter system is combined with a central tracker which stresses redundancy and efficiency. In addition, efficient reconstruction of secondary vertices and excellent momentum resolution for charged particles are essential for an ILC detector. The interaction region of the ILC is designed to host two detectors, which can be moved into the beam position with a push-pull scheme. The mechanical design of ILD and the overall integration of subdetectors takes these operational conditions into account.
202 citations
TL;DR: In this paper, the authors presented the physics potential of the ICAL detector as obtained from realistic detector simulations and gave the expected physics reach of the detector with 10 years of runtime.
Abstract: The upcoming 50 kt magnetized iron calorimeter (ICAL) detector at the India-based Neutrino Observatory (INO) is designed to study the atmospheric neutrinos and antineutrinos separately over a wide range of energies and path lengths. The primary focus of this experiment is to explore the Earth matter effects by observing the energy and zenith angle dependence of the atmospheric neutrinos in the multi-GeV range. This study will be crucial to address some of the outstanding issues in neutrino oscillation physics, including the fundamental issue of neutrino mass hierarchy. In this document, we present the physics potential of the detector as obtained from realistic detector simulations. We describe the simulation framework, the neutrino interactions in the detector, and the expected response of the detector to particles traversing it. The ICAL detector can determine the energy and direction of the muons to a high precision, and in addition, its sensitivity to multi-GeV hadrons increases its physics reach substantially. Its charge identification capability, and hence its ability to distinguish neutrinos from antineutrinos, makes it an efficient detector for determining the neutrino mass hierarchy. In this report, we outline the analyses carried out for the determination of neutrino mass hierarchy and precision measurements of atmospheric neutrino mixing parameters at ICAL, and give the expected physics reach of the detector with 10 years of runtime. We also explore the potential of ICAL for probing new physics scenarios like CPT violation and the presence of magnetic monopoles.
151 citations
Panjab University, Chandigarh1, University of Calicut2, Homi Bhabha National Institute3, Saha Institute of Nuclear Physics4, Bhabha Atomic Research Centre5, Indian Institute of Technology Madras6, Indian Institute of Technology Bombay7, University of Calcutta8, Tata Institute of Fundamental Research9, Harish-Chandra Research Institute10, University of Delhi11, University of Mysore12, Physical Research Laboratory13, University of Lucknow14, Aligarh Muslim University15, University of Kashmir16, Jawaharlal Nehru University17, Variable Energy Cyclotron Centre18, American College, Madurai19, Utkal University20, Banaras Hindu University21
TL;DR: In this paper, the authors presented the physics potential of the ICAL detector as obtained from realistic detector simulations and gave the expected physics reach of the detector with 10 years of runtime.
Abstract: The upcoming 50 kt magnetized iron calorimeter (ICAL) detector at the India-based Neutrino Observatory (INO) is designed to study the atmospheric neutrinos and antineutrinos separately over a wide range of energies and path lengths. The primary focus of this experiment is to explore the Earth matter effects by observing the energy and zenith angle dependence of the atmospheric neutrinos in the multi-GeV range. This study will be crucial to address some of the outstanding issues in neutrino oscillation physics, including the fundamental issue of neutrino mass hierarchy. In this document, we present the physics potential of the detector as obtained from realistic detector simulations. We describe the simulation framework, the neutrino interactions in the detector, and the expected response of the detector to particles traversing it. The ICAL detector can determine the energy and direction of the muons to a high precision, and in addition, its sensitivity to multi-GeV hadrons increases its physics reach substantially. Its charge identification capability, and hence its ability to distinguish neutrinos from antineutrinos, makes it an efficient detector for determining the neutrino mass hierarchy. In this report, we outline the analyses carried out for the determination of neutrino mass hierarchy and precision measurements of atmospheric neutrino mixing parameters at ICAL, and give the expected physics reach of the detector with 10 years of runtime. We also explore the potential of ICAL for probing new physics scenarios like CPT violation and the presence of magnetic monopoles.
116 citations
TL;DR: The International Design Study for the Neutrino Factory (the IDS-NF) was established by the community at the 9th International Workshop on Neutron Factories, super-beams, and beta- beams.
Abstract: The International Design Study for the Neutrino Factory (the IDS-NF) was established by the community at the ninth "International Workshop on Neutrino Factories, super-beams, and beta- beams" which was held in Okayama in August 2007. The IDS-NF mandate is to deliver the Reference Design Report (RDR) for the facility on the timescale of 2012/13. In addition, the mandate for the study [3] requires an Interim Design Report to be delivered midway through the project as a step on the way to the RDR. This document, the IDR, has two functions: it marks the point in the IDS-NF at which the emphasis turns to the engineering studies required to deliver the RDR and it documents baseline concepts for the accelerator complex, the neutrino detectors, and the instrumentation systems. The IDS-NF is, in essence, a site-independent study. Example sites, CERN, FNAL, and RAL, have been identified to allow site-specific issues to be addressed in the cost analysis that will be presented in the RDR. The choice of example sites should not be interpreted as implying a preferred choice of site for the facility.
75 citations
Cited by
More filters
[...]
TL;DR: In this paper, a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) is presented.
Abstract: Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These
9,929 citations
TL;DR: In this paper, the authors review the present status of global analyses of neutrino oscillations and discuss the robustness of the oscillation interpretation against departures from the Standard Solar Model and the possible existence of non-standard neutrinos physics.
Abstract: We review the present status of global analyses of neutrino oscillations, taking into account the most recent neutrino data including the latest KamLAND and K2K updates presented at Neutrino2004, as well as state-of-the-art solar and atmospheric neutrino flux calculations. We give the two-neutrino solar + KamLAND results, as well as two-neutrino atmospheric + K2K oscillation regions, discussing in each case the robustness of the oscillation interpretation against departures from the Standard Solar Model and the possible existence of non-standard neutrino physics. Furthermore, we give the best fit values and allowed ranges of the three-flavour oscillation parameters from the current worlds' global neutrino data sample and discuss in detail the status of the small parameters $\alpha \equiv \Dms/\Dma$ as well as $\sin^2\theta_{13}$, which characterize the strength of CP violating effects in neutrino oscillations. We also update the degree of rejection of four-neutrino interpretations of the LSND anomaly in view of the most recent developments.
592 citations
TL;DR: The theoretical status of coexistence in nuclei is summarized in this article, where microscopic shell-model descriptions and mean-field descriptions are emphasized, and a systematic data for both even and odd-mass nuclei, selected to illustrate the various ways in which coexistence is observed in nucleis.
Abstract: Shape coexistence in nuclei appears to be unique in the realm of finite many-body quantum systems It differs from the various geometrical arrangements that sometimes occur in a molecule in that in a molecule the various arrangements are of the widely separated atomic nuclei In nuclei the various ''arrangements'' of nucleons involve (sets of) energy eigenstates with different electric quadrupole properties such as moments and transition rates, and different distributions of proton pairs and neutron pairs with respect to their Fermi energies Sometimes two such structures will ''invert'' as a function of the nucleon number, resulting in a sudden and dramatic change in ground-state properties in neighboring isotopes and isotones In the first part of this review the theoretical status of coexistence in nuclei is summarized Two approaches, namely, microscopic shell-model descriptions and mean-field descriptions, are emphasized The second part of this review presents systematic data, for both even- and odd-mass nuclei, selected to illustrate the various ways in which coexistence is observed in nuclei The last part of this review looks to future developments and the issue of the universality of coexistence in nuclei Surprises continue to be discovered With the major advances in reaching to extremes of proton-neutronmore » number, and the anticipated new ''rare isotope beam'' facilities, guidelines for search and discovery are discussed« less
570 citations
TL;DR: In this article, a review of the literature on heavy-ion fusion at low energies is presented, with special emphasis given to the fusion of loosely bound stable and unstable projectiles, and the experimental challenges encountered in the measurement of the fusion cross section of these systems are pointed out.
415 citations
Harish-Chandra Research Institute1, Boston University2, CERN3, Columbia University4, Durham University5, Fermilab6, University of Paris-Sud7, Technische Universität München8, University of Geneva9, Max Planck Society10, Imperial College London11, Iowa State University12, University of California, Irvine13, Joint Institute for Nuclear Research14, University of Jyväskylä15, University of Kansas16, KEK17, University of Groningen18, Lawrence Berkeley National Laboratory19, Instituto Superior Técnico20, Los Alamos National Laboratory21, Lyon College22, Autonomous University of Madrid23, Tata Institute of Fundamental Research24, Northern Illinois University25, Northwestern University26, Osaka University27, University of Patras28, University of Pennsylvania29, Pontifical Catholic University of Rio de Janeiro30, Sapienza University of Rome31, Pontifical Catholic University of Chile32, University of Southampton33, University of Sussex34, National Cheng Kung University35, Technion – Israel Institute of Technology36, Tohoku University37, University of Tokyo38, University of California, Berkeley39, Institute for the Physics and Mathematics of the Universe40, Tokyo Metropolitan University41, International School for Advanced Studies42, University of Trieste43, International Centre for Theoretical Physics44, Spanish National Research Council45, University of Warwick46, University of Washington47, College of William & Mary48, University of Wisconsin-Madison49, University of Würzburg50, ETH Zurich51, University of Zurich52
TL;DR: The conclusions of the Physics Working Group of the International Scoping Study of a future Neutrino Factory and super-beam facility (the ISS) are presented in this article.
Abstract: The conclusions of the Physics Working Group of the International Scoping Study of a future Neutrino Factory and super-beam facility (the ISS) are presented. The ISS was carried out by the international community between NuFact05, (the 7th International Workshop on Neutrino Factories and Super-beams, Laboratori Nazionali di Frascati, Rome, 21–26 June 2005) and NuFact06 (Ivine, CA, 24–30 August 2006). The physics case for an extensive experimental programme to understand the properties of the neutrino is presented and the role of high-precision measurements of neutrino oscillations within this programme is discussed in detail. The performance of second-generation super-beam experiments, beta-beam facilities and the Neutrino Factory are evaluated and a quantitative comparison of the discovery potential of the three classes of facility is presented. High-precision studies of the properties of the muon are complementary to the study of neutrino oscillations. The Neutrino Factory has the potential to provide extremely intense muon beams and the physics potential of such beams is discussed in the final section of the report.
290 citations