169 research outputs found
Design, Construction and Commissioning of a Technological Prototype of a Highly Granular SiPM-on-tile Scintillator-Steel Hadronic Calorimeter
The CALICE collaboration is developing highly granular electromagnetic and
hadronic calorimeters for detectors at future energy frontier electron-positron
colliders. After successful tests of a physics prototype, a technological
prototype of the Analog Hadron Calorimeter has been built, based on a design
and construction techniques scalable to a collider detector. The prototype
consists of a steel absorber structure and active layers of small scintillator
tiles that are individually read out by directly coupled SiPMs. Each layer has
an active area of and a tile size of . With active layers, the prototype has nearly
readout channels, and its total thickness amounts to nuclear interaction
lengths. The dedicated readout electronics provide time stamping of each hit
with an expected resolution of about . The prototype was
constructed in 2017 and commissioned in beam tests at DESY. It recorded muons,
hadron showers and electron showers at different energies in test beams at CERN
in 2018. In this paper, the design of the prototype, its construction and
commissioning are described. The methods used to calibrate the detector are
detailed, and the performance achieved in terms of uniformity and stability is
presented.Comment: To be submitted to JINS
FROG: The Fast & Realistic OPENGL Displayer
FROG is a generic framework dedicated to visualisation of events in high
energy experiment. It is suitable to any particular physics experiment or
detector design. The code is light (<3 MB) and fast (browsing time ~20 events
per second for a large High Energy Physics experiment) and can run on various
operating systems, as its object-oriented structure (C++) relies on the
cross-platform OPENGL and GLUT libraries. Moreover, FROG does not require
installation of third party libraries for the visualisation. This document
describes the features and principles of FROG version 1.106, its working scheme
and numerous functionalities such as: 3D and 2D visualisations, graphical user
interface, mouse interface, configuration files, production of pictures of
various format, integration of personal objects, etc. Finally, several examples
of its current applications are presented for illustration.Comment: 26 pages, 15 figure
Shower development of particles with momenta from 15 GeV to 150 GeV in the CALICE scintillator-tungsten hadronic calorimeter
We present a study of showers initiated by electrons, pions, kaons, and
protons with momenta from 15 GeV to 150 GeV in the highly granular CALICE
scintillator-tungsten analogue hadronic calorimeter. The data were recorded at
the CERN Super Proton Synchrotron in 2011. The analysis includes measurements
of the calorimeter response to each particle type as well as measurements of
the energy resolution and studies of the longitudinal and radial shower
development for selected particles. The results are compared to Geant4
simulations (version 9.6.p02). In the study of the energy resolution we include
previously published data with beam momenta from 1 GeV to 10 GeV recorded at
the CERN Proton Synchrotron in 2010.Comment: 35 pages, 21 figures, 8 table
Pion and proton showers in the CALICE scintillator-steel analogue hadron calorimeter
Showers produced by positive hadrons in the highly granular CALICE
scintillator-steel analogue hadron calorimeter were studied. The experimental
data were collected at CERN and FNAL for single particles with initial momenta
from 10 to 80 GeV/c. The calorimeter response and resolution and spatial
characteristics of shower development for proton- and pion-induced showers for
test beam data and simulations using Geant4 version 9.6 are compared.Comment: 26 pages, 16 figures, JINST style, changes in the author list, typos
corrected, new section added, figures regrouped. Accepted for publication in
JINS
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