119419425
Acoustic detection of UHE neutrinos – the ACORNE project
An interesting new possibility of detection of ultra-high energy (UHE) neutrinos is that of acoustic detection whereby the acoustic pressure pulse generated as a UHE neutrino interacts in a suitable medium such as water or ice is detected by an array of acoustic sensors. Recent years have seen something of a renaissance of this field and there are currently a number of activities worldwide to assess the potential of this technique. The UK-based ACORNE collaboration is one of these activities; ACORNE has access to the QinetiQ underwater acoustic range off Rona, an island off the North-West coast of Scotland. The poster will summarise ACORNE's R&D work, including simulation of the thermoacoustic emission of neutrino-induced particle cascades, reconstruction of event vertices and the effects of refraction, potential neutrino flux sensitivities from large area hydrophone arrays, a study transducer based calibration techniques and an analysis of the first acoustic data recorded by the Rona hydrophone array.
18899812
Acoustic detection of ultra-high-energy neutrinos
Abstract At ultra-high energies (>10 18  eV) the Earth is opaque to neutrinos and detection techniques other than the optical Cherenkov technique must be pursued. Here the possibility of detecting neutrinos via their acoustic signature is discussed. The paper presents an overview of current worldwide activities in the acoustic detection field which includes recent results from test experimental set-ups, simulation work, sensitivity calculations and results from data taken at deep-water deployments.
117604384
Dark Matter Prospects with the ANTARES Neutrino Telescope
The ANTARES collaboration is building a large-area telescope at the bottom of the Mediterranean Sea, capable of detecting high-energy neutrinos from a number of sources. Of particular interest here is the possibility of detecting the presence of neutralino dark matter at the centres of galactic sources via the annihilation of neutralinos into products containing high-energy neutrinos. The principle of detection of high-energy neutrinos and the ANTARES detector are introduced and the sensitivity of the first stage, 0.1 km2 ANTARES detector to neutralinos is presented, along with comparisons to theoretical predictions and direct detection experiments.
108561956
Future Plans for the ACORNE Collaboration
A summary of the future plans for ACORNE collaboration are presented. Of particular note is the intended development of an acoustic calibrator to be deployed in the deep sea above the Rona hydrophone array. Crucial to this goal is work recently completed on the understanding of hydrophone response and the generation of bipolar acoustic signals; this work is presented in detail.
52249654
Integration with the LHC of Electron Interaction Region Optics for a Ring-ring LHeC
The Large Hadron Electron Collider (LHeC) project is a proposal to study e-p and e-A interactions at the LHC. One design uses an electron synchrotron to collide a 60 GeV e beam with the 7 TeV proton beam. Designing a new accelerator around the existing LHC machine poses unique challenges, particularly in the interaction region (IR). The electron beam must be quickly separated from the proton beam after the interaction point (IP) to avoid beam-beam effects, while not significantly reducing luminosity or producing large amounts of synchrotron radiation. The proton beam must pass through the electron optics, while the electron beam must avoid the proton optics. The long straight section requires bending in both planes to counteract the IP crossing angle and to displace the beam vertically from the electron machine to the proton IP. An achromatic bending scheme is used in the vertical plane to eliminate dispersion at the IP and provide an optics which is well matched to the LHeC ring lattice. The interaction region and long straight section design is presented and detailed, and the design process and principles discussed.
59360505
SYNCHROTRON RADIATION IN THE INTERACTION REGION FOR A RING-RING AND LINAC-RING LHeC
The Large Hadron electron Collider (LHeC) aims at bringing hadron-lepton collisions to CERN with centre of mass energies in the TeV scale. The LHeC will utilise the existing LHC storage ring with the addition of a 60 GeV electron accelerator. The electron beam will be stored and accelerated in either a storage ring in the LHC tunnel (Ring-Ring) or a linac tangent to the LHC tunnel (LinacRing). Synchrotron Radiation (SR) in the Interaction Region (IR) of this machine requires an iterative design process in which luminosity is optimised while the SR is minimised. This process also requires attention to be given to the detector as the beam pipe must be designed such that disturbing effects, such as out-gassing and background scattering, are minimised while the tracker remains close to the IP thus maximising the acceptance of the experiment. The machinery of GEANT4 has been used to simulate the SR load in the IR and also to design absorbers/masks to shield SR from backscattering into the detector or propagating with the electron beam. The outcome of these simulations, as well as cross checks, are described in the accompanying paper which characterises the current status of the IR design for both the Ring-Ring and Linac-Ring options of the LHeC in terms of SR.