Descripción
Hardware, calibration, measurement of medium properties, DOMs, photon detectors, deployment/installation
VLVnT 2021 | Parallel Session Room B
https://cern.zoom.us/j/68306216278
IceCube-Gen2 is a future large-scale extension to the IceCube Neutrino Observatory, a kilometer-scale neutrino detector at the geographic South Pole. The IceCube data acquisition system (DAQ) architecture, while running stably with over 99% uptime, will be re-optimized for IceCube-Gen2 to solve design challenges with power consumption, communications bandwidth, and cable specifications, while...
The KM3NeT Collaboration has already produced electronics to produce more than one thousand Digital Optical Modules, which have started to be deployed at the bottom of the Mediterranean Sea. An upgrade of the electronics is currently underway, expecting to have a revision of it by mid-2021 Here we describe the main improvements added to the DOM electronics, including the new high reliability...
The KM3NeT project aims to build a neutrino telescope in the depth of the Mediterranean Sea. The detector consists of a Kilometer-cube grid of Optical Modules, photosensors encapsulated into transparent pressure resistant glass spheres. A crucial component is the acoustic positioning system, which provides the position of photodetectors and structures in the deep sea with an accuracy of about...
The first stage of the construction of the deep underwater neutrino telescope Baikal-GVD is planned to be completed in 2024. The second stage of the detector deployment is planned to be carried out using a data acquisition system based on fiber optic technologies, which will allow for increased data throughput and more flexible trigger conditions. A dedicated test facility has been built and...
The KM3NeT Collaboration is currently deploying the first Detection Units of a neutrino observatory in the Mediterranean Sea, which, once completed, will be equipped with tens of thousand of so-called Digital Optical Modules. In addition to the Detection Units KM3NeT has designed an independent Calibration Unit, housing a set of calibration instruments, including e.g. an acoustic beacon and a...
The KM3NeT Collaboration has already produced more than one thousand acquisition boards, used for building two deep-sea neutrino detectors at the bottom of the Mediterranean Sea, with the intention of instrumenting a volume of several cubic kilometers. The acquisition modules, the so-called Digital Optical Modules, house the PMTs and the acquisition and control electronics of the module, the...
For testing and optimizing key elements of the KM3NeT data acquisition system, a test-bench has been set up at the INFN Sezione di Bologna. In this setup, a full detection unit is simulated, to test the optical network, time synchronisation, and on-shore computing resources. A fundamental tool in the test-setup is a dedicated electronic board: “the OctoPAES”.
Based on an ALTERA Max10 CPLD,...
The KM3NeT Collaboration is building a deep-sea neutrino observatory in the Mediterranean Sea equipped with thousands of glass spheres, hosting the so-called Digital Optical Modules, with an instrumented volume of several cubic kilometers. Reliability of the components used in the construction of the detectors is of extreme importance as the deployed Detection Units, each one composed of 18...
The large scalar neutrino detectors (JUNO, HyperK), need the 20 inch area PMTs as the photo-detection device for their large photocathode coverage and less electronic channels. In 2009, the researchers at IHEP have conceived a new concept of large area PMTs, of which the small MCP units replace the bulky Dynode chain. After several years R&D, the 20 inch MCP-PMT was successfully produced. This...
Novel optical sensor design decouples the photo-sensitive area from the PMT cathode area. Light guides can be shaped in a more favourable geometry for the target detector.
Twelve wavelength shifting optical modules (WOMs) will be deployed in the IceCube Upgrade.
The photo-sensitive area is a long cylinder coated with wavelength shifting paint which exploits the UV part of the Cherenkov...
A new long optical module (LOM) is under development for IceCube-Gen2, the proposed expansion to the IceCube neutrino observatory at the South Pole. The module is housed in an elongated borosilicate-glass pressure vessel, the size of which is constrained by the borehole diameter, which impacts drilling economy. The designs under consideration use either 16 or 18 4-inch PMTs, conditional on...
At the last VLVnT-conference in the talk “NEVOD as a test facility for future neutrino telescopes” presented by A.A. Petrukhin the methods for testing of optical modules inside the volume of the Cherenkov water detector NEVOD have been discussed. It was assumed that in 2020 the new optical module mDOM of the IceCube-Upgrade will be calibrated in this way. However, the covid-19 pandemic did not...
The IceCube-Gen2 Neutrino Observatory will feature an in-ice optical array, a larger in-ice radio detector array, and a surface cosmic ray air shower array.
The surface array will consist of stations based on the experience from the planned IceTop enhancement, each station having 4 pairs of scintillator panels, 3 radio antennas and a central hub hosting electronics for data readout and time...
In the search for astrophysical neutrinos, neutrino telescopes instrument large volumes of clear natural water. Photomultiplier tubes placed along mooring lines detect the Cherenkov light of secondary particles produced in neutrino interactions, and allow us to search for possible neutrino sources in the sky. The P-ONE experiment proposes a new neutrino telescope off the shore of British...
In order to accurately reconstruct track and cascade events in a neutrino telescope, it is necessary to have information about the optical properties of the medium. The main purpose of the laser event analysis is to evaluate the light absorption length and the light scattering length in the deep Baikal water. Currently, the Baikal-GVD detector is equipped with 5 lasers with a wavelength of 532...
The IceCube Neutrino Observatory instruments about 1 km^3 of deep, glacial ice at the geographic South Pole using 5160 photomultipliers to detect Cherenkov light from relativistic, charged particles. Most IceCube science goals rely on precise understanding and modelling of the optical properties of the instrumented ice. A peculiar light propagation effect observed by IceCube is an anisotropic...
The large-scale deep underwater Cherenkov neutrino telescopes like Baikal-GVD, ANTARES or KM3NeT, require calibration and testing methods of their optical modules. These methods usually include laser-based systems which allow to check the telescope responses to the light and for real-time monitoring of the optical parameters of water such as absorption and scattering lengths, which show...
