A5078678356- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Nuclear physics research studies
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Atomic and Molecular Physics
- Advanced NMR Techniques and Applications
- Particle Detector Development and Performance
- Advanced Radiotherapy Techniques
- High-Energy Particle Collisions Research
- X-ray Spectroscopy and Fluorescence Analysis
- Radiation Detection and Scintillator Technologies
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Quantum Chromodynamics and Particle Interactions
- Medical Imaging Techniques and Applications
- Muon and positron interactions and applications
- Plasma Diagnostics and Applications
- Magnetic confinement fusion research
- Solid-state spectroscopy and crystallography
- Ion-surface interactions and analysis
- Radiation Effects in Electronics
Massachusetts Institute of Technology
2012-2024
Lawrence Berkeley National Laboratory
2008-2020
Louisiana State University Agricultural Center
2017-2020
Campbell Collaboration
2010-2017
Yale University
1971-2011
European Organization for Nuclear Research
2011
Institute of Nuclear and Particle Physics
2010
Elytt Energy (Spain)
2009
Oak Ridge National Laboratory
1996-2009
Rutherford Appleton Laboratory
2009
The ATLAS detector as installed in its experimental cavern at point 1 CERN is described this paper. A brief overview of the expected performance when Large Hadron Collider begins operation also presented.
By using the ATLAS detector, observations have been made of a centrality-dependent dijet asymmetry in collisions lead ions at Large Hadron Collider. In sample lead-lead events with per-nucleon center mass energy 2.76 TeV, selected minimum bias trigger, jets are reconstructed fine-grained, longitudinally segmented electromagnetic and hadronic calorimeters. The transverse energies dijets opposite hemispheres observed to become systematically more unbalanced increasing event centrality leading...
The silicon pixel tracking system for the ATLAS experiment at Large Hadron Collider is described and performance requirements are summarized. Detailed descriptions of detector electronics sensors given. design, fabrication, assembly modules presented. Data obtained from test beams as well studies using cosmic rays also discussed.
Measurements are presented from proton–proton collisions at centre-of-mass energies of , 2.36 and 7 TeV recorded with the ATLAS detector LHC. Events were collected using a single-arm minimum-bias trigger. The charged-particle multiplicity, its dependence on transverse momentum pseudorapidity relationship between mean multiplicity measured. in different regions phase space shown, providing diffraction-reduced measurements as well more inclusive ones. observed distributions corrected to...
A measurement of the cross section for inclusive production isolated prompt photons in $pp$ collisions at a center-of-mass energy $\sqrt{s}=7\text{ }\text{ }\mathrm{TeV}$ is presented. The covers pseudorapidity ranges $|{\ensuremath{\eta}}^{\ensuremath{\gamma}}|<1.37$ and $1.52\ensuremath{\le}|{\ensuremath{\eta}}^{\ensuremath{\gamma}}|<1.81$ transverse range $15\ensuremath{\le}{E}_{\mathrm{T}}^{\ensuremath{\gamma}}<100\text{ }\mathrm{GeV}$. results are based on an integrated luminosity...
Jet cross sections have been measured for the first time in proton-proton collisions at a centre-of-mass energy of 7 TeV using ATLAS detector. The measurement uses an integrated luminosity 17 nb-1 recorded Large Hadron Collider. anti-kt algorithm is used to identify jets, with two jet resolution parameters, R = 0.4 and 0.6. dominant uncertainty comes from scale, which determined within 7% central jets above 60 GeV transverse momentum. Inclusive single-jet differential are presented as...
The first measurements from proton-proton collisions recorded with the ATLAS detector at LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during centre-of-mass energy of 900 GeV. charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, relationship between mean multiplicity measured for events least one charged particle kinematic range |eta|<2.5 pT>500 MeV. compared to Monte Carlo models results other experiments same...
Using the ATLAS detector, a centrality-dependent suppression has been observed in yield of J/{\psi} mesons produced collisions lead ions at Large Hadron Collider. In sample minimum-bias lead-lead nucleon-nucleon centre mass energy \surd sNN = 2.76 TeV, corresponding to an integrated luminosity about 6.7 {\mu}b^{-1}, are reconstructed via their decays {\mu}+{\mu}- pairs. The measured yield, normalized number binary collisions, is found significantly decrease from peripheral central...
We have produced element 106 by bombarding $^{249}\mathrm{Cf}$ with $^{18}\mathrm{O}$ ions accelerated the SuperHILAC. The new nuclide $^{263}106$, ($^{18}\mathrm{O}$, $4n$) reaction, is shown to decay $\ensuremath{\alpha}$ emission a half-life of 0.9\ifmmode\pm\else\textpm\fi{}0.2 sec and principal energy 9.06\ifmmode\pm\else\textpm\fi{}0.04 MeV known $^{259}\mathrm{Rf}$, which in turn $^{255}\mathrm{No}$.
A search for new heavy particles manifested as resonances in two-jet final states is presented. The data were produced 7 TeV proton-proton collisions by the LHC and correspond to an integrated luminosity of $315\text{ }\text{ }{\mathrm{nb}}^{\ensuremath{-}1}$ collected ATLAS detector. No observed. Upper limits set on product cross section signal acceptance excited-quark (${q}^{*}$) production a function ${q}^{*}$ mass. These exclude at 95% C.L. mass interval $0.30<{m}_{{q}^{*}}<1.26\text{...
Measurements of charged particle distributions, sensitive to the underlying event, have been performed with ATLAS detector at LHC. The measurements are based on data collected using a minimum-bias trigger select proton-proton collisions center-of-mass energies 900 GeV and 7 TeV. "underlying event" is defined as those aspects hadronic interaction attributed not hard scattering process, but rather accompanying interactions rest proton. Three regions in azimuthal angle respect highest-pt such...
First measurements of the W -> lnu and Z/gamma* ll (l = e, mu) production cross sections in proton-proton collisions at sqrt(s) 7 TeV are presented using data recorded by ATLAS experiment LHC. The results based on 2250 179 candidate events selected from a set corresponding to an integrated luminosity approximately 320 nb-1. measured total Z/gamma*-boson times respective leptonic branching ratios for combined electron muon channels $\stotW$ * BR(W lnu) 9.96 +- 0.23(stat) 0.50(syst) 1.10(lumi)...
After many years on the periphery of cancer therapy, successes proton and ion beams in tumor therapy are gradually receiving a higher degree recognition. The considerable construction acquisition costs usually invoked to explain slow market penetration this favorable treatment modality. Recently, high-intensity lasers have been suggested as potential, cost-saving alternative cyclotrons or synchrotrons for oncology. This article will detail technical requirements necessary successful...
Cross sections for the electron capture by 82- , 140- and 200-MeV/amu ${\mathrm{Xe}}^{54+}$, ${\mathrm{Xe}}^{53+}$, ${\mathrm{Xe}}^{52+}$ ions incident on thin solid targets from Be to Au were measured. The measurements are compared with calculations of radiative nonradiative capture. based relativistic eikonal approximation which includes transitions K, L, M shells target nearly all projectile shells. In high-Z targets, into excited states is dominant, as predicted confirmed comparing...
Jet shapes have been measured in inclusive jet production proton-proton collisions at √s=7 TeV using 3 pb−1 of data recorded by the ATLAS experiment LHC. Jets are reconstructed anti-kt algorithm with transverse momentum 30 GeV<pT<600 GeV and rapidity region |y|<2.8. The corrected for detector effects compared to several leading-order QCD matrix elements plus parton shower Monte Carlo predictions, including different sets parameters tuned model fragmentation processes underlying event...
This paper introduces a novel, high-intensity source of electron antineutrinos from the production and subsequent decay 8Li. When paired with an existing ~1 kton scintillator-based detector, this <E_\nu>=6.4 MeV opens wide range possible searches for beyond standard model physics via studies inverse beta interaction. In particular, experimental design described here has unprecedented sensitivity to antineutrino disappearance at $\Delta m^2\sim$ 1 eV$^2$ features ability distinguish between...
Dijet angular distributions from the first LHC pp collisions at center-of-mass energy s=7TeV have been measured with ATLAS detector. The dataset used for this analysis represents an integrated luminosity of 3.1pb−1. χ and centrality ratios up to dijet masses 2.8 TeV, found be in good agreement Standard Model predictions. Analysis excludes quark contact interactions a compositeness scale Λ below 3.4 95% confidence level, significantly exceeding previous limits.
This Letter reports on a first measurement of the inclusive W+jets cross section in proton–proton collisions at centre-of-mass energy 7 TeV LHC, with ATLAS detector. Cross sections, both electron and muon decay modes W-boson, are presented as function jet multiplicity transverse momentum leading next-to-leading jets event. Measurements also ratio sections σ(W+⩾n)/σ(W+⩾n−1) for multiplicities n=1–4. The results, based an integrated luminosity 1.3pb−1, have been corrected all known detector...
Ten years ago, the authors of this report published a first paper on technical challenges that laser accelerators need to overcome before they could be applied tumor therapy. Among major issues were maximum energy accelerated ions and their intensity, control reproducibility laser-pulse output, quality assurance patient safety. These remain today. While theoretical progress has been made for designing transport systems, tailoring plumes laser-generated protons, suitable dose delivery,...