Editorial Buitink, S; Hörandel, J R; de Jong, S ...
EPJ Web of Conferences,
01/2017, Letnik:
135
Conference Proceeding
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This proceeding gives a summary of the current status and open questions of the radio technique for cosmic-ray air showers, assuming that the reader is already familiar with the principles. It ...includes recent results of selected experiments not present at this conference, e.g., LOPES and TREND. Current radio arrays like AERA or Tunka-Rex have demonstrated that areas of several km2 can be instrumented for reasonable costs with antenna spacings of the order of 200m. For the energy of the primary particle such sparse antenna arrays can already compete in absolute accuracy with other precise techniques, like the detection of air-fluorescence or air-Cherenkov light. With further improvements in the antenna calibration, the radio detection might become even more accurate. For the atmospheric depth of the shower maximum, Xmax, currently only the dense array LOFAR features a precision similar to the fluorescence technique, but analysis methods for the radio measurement of Xmax are still under development. Moreover, the combination of radio and muon measurements is expected to increase the accuracy of the mass composition, and this around-the-clock recording is not limited to clear nights as are the light-detection methods. Consequently, radio antennas will be a valuable add-on for any air shower array targeting the energy range above 100 PeV.
A fiber detector radiation hardness test Bähr, J; Nahnhauer, R; Nerreter, S ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
07/2000, Letnik:
449, Številka:
1
Journal Article
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An intense
146
MeV/c
pion beam was stopped inside a scintillating fiber detector made out of 12 planes with 16 pixels each, where every pixel consists of 8×8 densely packed scintillating fibers of ...500 μm diameter. The detector was irradiated for 52 h to more than 10 kGy at its center. Before and directly after the irradiation the detector had been exposed to a particle beam to compare the corresponding light output. This study was continued during the following three months using cosmic rays. No damage was found taking into account the measurement errors of 5–10%. A 9 cm deep lucite degrader became irreversibly non-transparent in the irradiation region.
The readout of scintillating fibers using Silicon APDs and Metal-Resistive-Semiconductor (MRS) devices was investigated in a large temperature range down to −150°C in the laboratory and at an ...electron beam. In comparison to conventional PMs with bialkali cathodes an improved efficiency was found for low light signals from blue and green scintillating fibers of 0.5 mm diameter.
With construction halfway complete, IceCube is already the most sensitive neutrino telescope ever built. A rearrangement of the final holes of IceCube with increased spacing has been discussed ...recently to optimize the high energy sensitivity of the detector. Extending this baseline with radio and acoustic instrumentation in the same holes could further improve the high energy response. The goal would be both to detect events and to act as a pathfinder for hybrid detection, towards a possible larger hybrid array. Simulation results for such an array are presented here.
The H1 forward proton spectrometer at HERA van Esch, P.; Kapichine, M.; Morozov, A. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
05/2000, Letnik:
446, Številka:
3
Journal Article
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The forward proton spectrometer is part of the H1 detector at the HERA collider. Protons with energies above 500
GeV and polar angles below 1
mrad can be detected by this spectrometer. The main ...detector components are scintillating fiber detectors read out by position-sensitive photo-multipliers. These detectors are housed in the so-called Roman Pots which allow them to be moved close to the circulating proton beam. Four Roman Pot stations are located at distances between 60 and 90
m from the interaction point.
The advantages and possibilities of fiber technology for the detection of particles in 500 GeV e{sup +}e{sup -1} reactions are considered. It is suggested to build a fast trigger which could be used ...also for intermediate tracking. A fiber preshower in front of the electromagnetic calorimeter would allow to identify electrons and photons with a space precision better than 100 {mu}m.
A fiber detector concept has been realized allowing to register particles within less than 100
ns with a space point precision of about 100
μm at low occupancy. Three full size prototypes have been ...built by different producers and tested at a 3
GeV electron beam at DESY. After 3
m of light guides 8–10 photoelectrons were registered by multichannel photomultipliers providing an efficiency of more than 99%. Using all available data a resolution of 86
μm was measured.
Since 1995 the H1 experiment at HERA is operating a Forward Proton Spectrometer (FPS) employing the HERA machine magnets adjacent to the interaction zone as spectrometer magnets. The FPS consists of ...four stations, two vertical stations and two horizontal stations. Scattered protons are detected in pairs of stations behind the interaction point with scintillating fiber hodoscopes. The scintillating fibers are readout by Position-Sensitive Photomultipliers (PSPM) in the case of the vertical stations and by Micro-Channel Photomultipliers (MCPM) for the horizontal stations.
The South Pole Acoustic Test Setup - SPATS - was built to measure the acoustic properties of Antarctic ice versus depth. Corresponding results are presented for the sound speed, the acoustic ...attenuation length and the noise level present at the Pole.
Detection of the faint flux of neutrinos from interactions of the highest energy charged cosmic particles with microwave background photons with a reasonable number of events would contribute to ...answering interesting questions of particle physics as well as astro-particle physics and cosmology. This needs however detector volumes 100 times larger than the biggest optical neutrino telescopes presently under construction. The use of at least two technologies with different systematics would help to fight the large background expected to hide the small signal. A hybrid optical-radio-acoustic array suggested around the IceCube observatory at the South Pole seems to be a promising option for such an experiment. This is the reason for an extensive evaluation of the acoustic properties of the ice at the Pole with the help of the South Pole Acoustic Test Setup – SPATS. SPATS consists of four strings with seven acoustic stations each, deployed in the upper part of IceCube bore-holes down to 400 m to 500 m depth. Each acoustic station has an acoustic transmitter and three acoustic receivers. Data have been taken with since early 2007. During the last Austral summer in addition a movable transmitter was used in several water filled bore-holes aiming in particular for a relative calibration of the setup. Preliminary results are presented on speed of sound versus depth, noise behavior and attenuation length measurements
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