Layout and performance of RPCs used in the Argo-YBJ experiment Aielli, G.; Assiro, R.; Bacci, C. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
06/2006, Volume:
562, Issue:
1
Journal Article
Peer reviewed
The layout of the RPCs, used in the Argo-YBJ experiment to image with a high space-time granularity the atmospheric shower, is described in this paper. The detector has been assembled to provide both ...digital and analog informations in order to cover a wide particle density range with a time accuracy of 1
ns. The experimental results obtained operating the chambers in streamer mode at sea level with a standard gas mixture are presented.
Ultra-low mass drift chambers Assiro, R.; Cappelli, L.; Cascella, M. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
08/2013, Volume:
718
Journal Article
Peer reviewed
We present a novel low mass drift chamber concept, developed in order to fulfill the stringent requirements imposed by the experiments for extremely rare processes, which require high resolutions ...(order of 100–200 keV/c) for particle momenta in a range (50–100MeV/c) totally dominated by the multiple scattering contribution.
We describe a geometry optimization procedure and a new wiring strategy with a feed-through-less wire anchoring system developed and tested on a drift chamber prototype under completion at INFN-Lecce .
The PADME experiment at the DAΦNE Beam-Test Facility (BTF) is designed to search for the gauge boson of a new U(1) interaction in the process e+e−→γ+A′, using the intense positron beam hitting a ...light target. The A′, usually referred as a dark photon, is assumed to decay into invisible particles of a secluded sector and it can be observed by searching for an anomalous peak in the spectrum of the missing mass measured in events with a single photon in the final state. The measurement requires the determination of the 4-momentum of the recoil photon, performed by a homogeneous, highly segmented BGO crystals calorimeter. A significant improvement of the missing mass resolution is possible using an active target capable of determining the average position of the positron pulse with a resolution of less than 1 mm. This report presents the performance of a real size (2 × 2 cm2) PADME active target made of a thin (50 μm) diamond sensor, with graphitic strips produced via laser irradiation on both sides. The measurements are based on data collected in a beam test at the BTF in November 2015.
Local Station: the data read-out basic unit for the ARGO-YBJ experiment Assiro, R.; Aloisio, A.; Catalanotti, S. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
02/2004, Volume:
518, Issue:
1
Journal Article
Peer reviewed
ARGO-YBJ is a full coverage layer of Resistive Plate Counters (RPCs) covering an area of about
5.800
m
2
to be installed at the YangBaJing Laboratory (Tibet, China) at
4.300
m
a.s.l
. The DAQ system ...is based on a Central Station which receives the detector information from distributed readout electronics. Data from each RPC are acquired from a Receiver Card which reads out and digitizes the space and time information from 10 pick-up pads and gives out the pad multiplicity for trigger purposes. The Receiver Cards are hosted in Local Stations which Group 12 RPCs. On trigger occurrence, each Local Station sends the collected data to the Central Station. Both the detector and the electronics allow 1 ns accuracy in time measurements. In this work a detailed description of the Local Station and the Trigger System are presented.
The MACRO detector at Gran Sasso Ambrosio, M.; Antolini, R.; Assiro, R. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
07/2002, Volume:
486, Issue:
3
Journal Article
Peer reviewed
MACRO was an experiment that ran in the Laboratori Nazionali del Gran Sasso from 1988 to 2000. Its principal goal was to observe magnetic monopoles or set significantly lower experimental flux limits ...than had been previously available in the velocity range from about
β=10
−4 to unity. In addition it made a variety of other observations. Examples are: setting flux limits on other so far unobserved particles such as nuclearites and lightly ionizing particles, searching for WIMP annihilations in the Earth and the Sun and for neutrino bursts from stellar collapses in or near our Galaxy, and making measurements relevant to high energy muon and neutrino astronomy and of the flux of up-going muons as a function of nadir angle showing evidence for neutrino oscillations.
The apparatus consisted of three principal types of detectors: liquid scintillator counters, limited streamer tubes, and nuclear track etch detectors. In addition, over part of its area it contained a transition radiation detector. The general design philosophy emphasized redundancy and complementarity. This paper describes the technical aspects of the complete MACRO detector, its operational performance, and the techniques used to calibrate it and verify its proper operation. It supplements a previously published paper which described the first portion of the detector that was built and operated.
The PADME experiment is designed to search for a hypothetical dark photon \(A^{\prime}\) produced in positron-electron annihilation using a bunched positron beam at the Beam Test Facility of the INFN ...Laboratori Nazionali di Frascati. The expected sensitivity to the \(A^{\prime}\)-photon mixing parameter \(\epsilon\) is 10\(^{-3}\), for \(A^{\prime}\) mass \(\le\) 23.5 MeV/\(c^{2}\) after collecting \(\sim 10^{13}\) positrons-on-target. This paper presents the PADME detector status after commissioning in July 2019. In addition, the software algorithms employed to reconstruct physics objects, such as photons and charged particles, and the calibration procedures adopted are illustrated in detail. The results show that the experimental apparatus reaches the design performance, and is able to identify and measure standard electromagnetic processes, such as positron Bremsstrahlung, electron-positron annihilation into two photons.
The PADME experiment at the DA$\Phi$NE Beam-Test Facility (BTF) is designed
to search for the gauge boson of a new $\rm U(1)$ interaction in the process
e$^+$e$^-\rightarrow\gamma$+$\rm A'$, using ...the intense positron beam hitting a
light target. The $\rm A'$, usually referred as dark photon, is assumed to
decay into invisible particles of a secluded sector and it can be observed by
searching for an anomalous peak in the spectrum of the missing mass measured in
events with a single photon in the final state. The measurement requires the
determination of the 4-momentum of the recoil photon, performed by a
homogeneous, highly segmented BGO crystals calorimeter. A significant
improvement of the missing mass resolution is possible using an active target
capable to determine the average position of the positron bunch with a
resolution of less than 1 mm. This report presents the performance of a real
size $\rm (2x2 cm^2)$ PADME active target made of a thin (50 $\mu$m) diamond
sensor, with graphitic strips produced via laser irradiation on both sides. The
measurements are based on data collected in a beam test at the BTF in November
2015.
We presents a novel technique for the fast assembly of next generation ultra low mass drift chambers offering space point resolution of the order of 100 μm and high tolerance to pile-up. The chamber ...design has been developed keeping in mind the requirements for the search of rare processes: high resolutions (order of 100–200 KeV/c) for particles momenta in a range (50–100 MeV/c) totally dominated by the multiple scattering contribution (e.g., muon and kaon decay experiment such as MEG at PSI and Mu2e and ORKA at Fermilab).
We describe a novel wiring strategy enabling the semiautomatic wiring of a complete layer with a high degree of control over wire tension and position. We also present feed-through-less wire anchoring system. These techniques have been already implemented at INFN-Lecce in the construction of a prototype drift chamber to be soon tested with cosmic rays and particle beams.
The PADME experiment at the DA\(\Phi\)NE Beam-Test Facility (BTF) is designed to search for the gauge boson of a new \(\rm U(1)\) interaction in the process e\(^+\)e\(^-\rightarrow\gamma\)+\(\rm ...A'\), using the intense positron beam hitting a light target. The \(\rm A'\), usually referred as dark photon, is assumed to decay into invisible particles of a secluded sector and it can be observed by searching for an anomalous peak in the spectrum of the missing mass measured in events with a single photon in the final state. The measurement requires the determination of the 4-momentum of the recoil photon, performed by a homogeneous, highly segmented BGO crystals calorimeter. A significant improvement of the missing mass resolution is possible using an active target capable to determine the average position of the positron bunch with a resolution of less than 1 mm. This report presents the performance of a real size \(\rm (2x2 cm^2)\) PADME active target made of a thin (50 \(\mu\)m) diamond sensor, with graphitic strips produced via laser irradiation on both sides. The measurements are based on data collected in a beam test at the BTF in November 2015.
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