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STRAW (STRings for Absorption length in Water): pathfinder for a neutrino telescope in the deep Pacific Ocean
Authors:
M. Boehmer,
J. Bosma,
D. Brussow,
L. Farmer,
C. Fruck,
R. Gernhäuser,
A. Gärtner,
D. Grant,
F. Henningsen,
S. Hiller,
M. Hoch,
K. Holzapfel,
R. Jenkyns,
Na. Khera,
Ni. Khera,
K. Krings,
C. Kopper,
I. Kulin,
K. Leismüller,
J. Little,
P. Macoun,
J. Michel,
M. Morley,
L. Papp,
B. Pirenne
, et al. (7 additional authors not shown)
Abstract:
We report about the design and the initial performances of the pathfinder mission for a possible large scale neutrino telescope named "STRings for Absorption length in Water" (STRAW). In June 2018 STRAW has been deployed at the Cascadia Basin site operated by Ocean Network Canada and has been collecting data since then. At a depth of about 2600 meters, the two STRAW 120 meters tall mooring lines a…
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We report about the design and the initial performances of the pathfinder mission for a possible large scale neutrino telescope named "STRings for Absorption length in Water" (STRAW). In June 2018 STRAW has been deployed at the Cascadia Basin site operated by Ocean Network Canada and has been collecting data since then. At a depth of about 2600 meters, the two STRAW 120 meters tall mooring lines are instrumented by three "Precision Optical Calibration Modules" (POCAM) and five Digital Optical Sensors (sDOM). We describe the instrumentation deployed and first light in the Pacific Ocean.
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Submitted 5 February, 2019; v1 submitted 31 October, 2018;
originally announced October 2018.
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Trapping in irradiated p-on-n silicon sensors at fluences anticipated at the HL-LHC outer tracker
Authors:
W. Adam,
T. Bergauer,
M. Dragicevic,
M. Friedl,
R. Fruehwirth,
M. Hoch,
J. Hrubec,
M. Krammer,
W. Treberspurg,
W. Waltenberger,
S. Alderweireldt,
W. Beaumont,
X. Janssen,
S. Luyckx,
P. Van Mechelen,
N. Van Remortel,
A. Van Spilbeeck,
P. Barria,
C. Caillol,
B. Clerbaux,
G. De Lentdecker,
D. Dobur,
L. Favart,
A. Grebenyuk,
Th. Lenzi
, et al. (663 additional authors not shown)
Abstract:
The degradation of signal in silicon sensors is studied under conditions expected at the CERN High-Luminosity LHC. 200 $μ$m thick n-type silicon sensors are irradiated with protons of different energies to fluences of up to $3 \cdot 10^{15}$ neq/cm$^2$. Pulsed red laser light with a wavelength of 672 nm is used to generate electron-hole pairs in the sensors. The induced signals are used to determi…
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The degradation of signal in silicon sensors is studied under conditions expected at the CERN High-Luminosity LHC. 200 $μ$m thick n-type silicon sensors are irradiated with protons of different energies to fluences of up to $3 \cdot 10^{15}$ neq/cm$^2$. Pulsed red laser light with a wavelength of 672 nm is used to generate electron-hole pairs in the sensors. The induced signals are used to determine the charge collection efficiencies separately for electrons and holes drifting through the sensor. The effective trapping rates are extracted by comparing the results to simulation. The electric field is simulated using Synopsys device simulation assuming two effective defects. The generation and drift of charge carriers are simulated in an independent simulation based on PixelAV. The effective trapping rates are determined from the measured charge collection efficiencies and the simulated and measured time-resolved current pulses are compared. The effective trapping rates determined for both electrons and holes are about 50% smaller than those obtained using standard extrapolations of studies at low fluences and suggests an improved tracker performance over initial expectations.
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Submitted 7 May, 2015;
originally announced May 2015.
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The ALICE TPC, a large 3-dimensional tracking device with fast readout for ultra-high multiplicity events
Authors:
J. Alme,
Y. Andres,
H. Appelshauser,
S. Bablok,
N. Bialas,
R. Bolgen,
U. Bonnes,
R. Bramm,
P. Braun-Munzinger,
R. Campagnolo,
P. Christiansen,
A. Dobrin,
C. Engster,
D. Fehlker,
P. Foka,
U. Frankenfeld,
J. J. Gaardhoje,
C. Garabatos,
P. Glassel,
C. Gonzalez Gutierrez,
P. Gros,
H. -A. Gustafsson,
H. Helstrup,
M. Hoch,
M. Ivanov
, et al. (51 additional authors not shown)
Abstract:
The design, construction, and commissioning of the ALICE Time-Projection Chamber (TPC) is described. It is the main device for pattern recognition, tracking, and identification of charged particles in the ALICE experiment at the CERN LHC. The TPC is cylindrical in shape with a volume close to 90 m^3 and is operated in a 0.5 T solenoidal magnetic field parallel to its axis.
In this paper we des…
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The design, construction, and commissioning of the ALICE Time-Projection Chamber (TPC) is described. It is the main device for pattern recognition, tracking, and identification of charged particles in the ALICE experiment at the CERN LHC. The TPC is cylindrical in shape with a volume close to 90 m^3 and is operated in a 0.5 T solenoidal magnetic field parallel to its axis.
In this paper we describe in detail the design considerations for this detector for operation in the extreme multiplicity environment of central Pb--Pb collisions at LHC energy. The implementation of the resulting requirements into hardware (field cage, read-out chambers, electronics), infrastructure (gas and cooling system, laser-calibration system), and software led to many technical innovations which are described along with a presentation of all the major components of the detector, as currently realized. We also report on the performance achieved after completion of the first round of stand-alone calibration runs and demonstrate results close to those specified in the TPC Technical Design Report.
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Submitted 12 January, 2010;
originally announced January 2010.