5 research outputs found
Characterization of the demonstrator of the fast silicon monolithic ASIC for the TT-PET project
The TT-PET collaboration is developing a small animal TOF-PET scanner based
on monolithic silicon pixel sensors in SiGe BiCMOS technology. The demonstrator
chip, a small-scale version of the final detector ASIC, consists of a 3 x 10
pixel matrix integrated with the front-end, a 50 ps binning TDC and read out
logic. The chip, thinned down to 100 {\mu}m and backside metallized, was
operated at a voltage of 180 V. The tests on a beam line of minimum ionizing
particles show a detection efficiency greater than 99.9 % and a time resolution
down to 110 ps
The FASER Detector
FASER, the ForwArd Search ExpeRiment, is an experiment dedicated to searching
for light, extremely weakly-interacting particles at CERN's Large Hadron
Collider (LHC). Such particles may be produced in the very forward direction of
the LHC's high-energy collisions and then decay to visible particles inside the
FASER detector, which is placed 480 m downstream of the ATLAS interaction
point, aligned with the beam collisions axis. FASER also includes a
sub-detector, FASER, designed to detect neutrinos produced in the LHC
collisions and to study their properties. In this paper, each component of the
FASER detector is described in detail, as well as the installation of the
experiment system and its commissioning using cosmic-rays collected in
September 2021 and during the LHC pilot beam test carried out in October 2021.
FASER will start taking LHC collision data in 2022, and will run throughout LHC
Run 3
The trigger and data acquisition system of the FASER experiment
The FASER experiment is a new small and inexpensive experiment that is placed 480 meters downstream of the ATLAS experiment at the CERN LHC. FASER is designed to capture decays of new long-lived particles, produced outside of the ATLAS detector acceptance. These rare particles can decay in the FASER detector together with about 500–1000 Hz of other particles originating from the ATLAS interaction point. A very high efficiency trigger and data acquisition system is required to ensure that the physics events of interest will be recorded. This paper describes the trigger and data acquisition system of the FASER experiment and presents performance results of the system acquired during initial commissioning
The trigger and data acquisition system of the FASER experiment
The FASER experiment is a new small and inexpensive experiment that is placed
480 meters downstream of the ATLAS experiment at the CERN LHC. FASER is
designed to capture decays of new long-lived particles, produced outside of the
ATLAS detector acceptance. These rare particles can decay in the FASER detector
together with about 500-1000 Hz of other particles originating from the ATLAS
interaction point. A very high efficiency trigger and data acquisition system
is required to ensure that the physics events of interest will be recorded.
This paper describes the trigger and data acquisition system of the FASER
experiment and presents performance results of the system acquired during
initial commissioning
First measurement of the and interaction cross sections at the LHC with FASER’s emulsion detector
This paper presents the first results of the study of high-energy electron and muon neutrino charged-current interactions in the FASER emulsion/tungsten detector of the FASER experiment at the LHC. A subset of the FASER volume, which corresponds to a target mass of 128.6~kg, was exposed to neutrinos from the LHC collisions with a centre-of-mass energy of 13.6~TeV and an integrated luminosity of 9.5 fb. Applying stringent selections requiring electrons with reconstructed energy above 200~GeV, four electron neutrino interaction candidate events are observed with an expected background of , leading to a statistical significance of 5.2. This is the first direct observation of electron neutrino interactions at a particle collider. Eight muon neutrino interaction candidate events are also detected, with an expected background of , leading to a statistical significance of 5.7. The signal events include neutrinos with energies in the TeV range, the highest-energy electron and muon neutrinos ever detected from an artificial source. The energy-independent part of the interaction cross section per nucleon is measured over an energy range of 560--1740 GeV (520--1760 GeV) for () to be (), consistent with Standard Model predictions. These are the first measurements of neutrino interaction cross sections in those energy ranges.This paper presents the first results of the study of high-energy electron and muon neutrino charged-current interactions in the FASER emulsion/tungsten detector of the FASER experiment at the LHC. A subset of the FASER volume, which corresponds to a target mass of 128.6~kg, was exposed to neutrinos from the LHC collisions with a centre-of-mass energy of 13.6~TeV and an integrated luminosity of 9.5 fb. Applying stringent selections requiring electrons with reconstructed energy above 200~GeV, four electron neutrino interaction candidate events are observed with an expected background of , leading to a statistical significance of 5.2. This is the first direct observation of electron neutrino interactions at a particle collider. Eight muon neutrino interaction candidate events are also detected, with an expected background of , leading to a statistical significance of 5.7. The signal events include neutrinos with energies in the TeV range, the highest-energy electron and muon neutrinos ever detected from an artificial source. The energy-independent part of the interaction cross section per nucleon is measured over an energy range of 560--1740 GeV (520--1760 GeV) for () to be (), consistent with Standard Model predictions. These are the first measurements of neutrino interaction cross sections in those energy ranges