15 research outputs found
Comparison of hadron shower data with simulations
An analog hadron calorimeter (AHCAL) prototype of 5.3 nuclear interaction
lengths thickness has been designed and constructed by members of the CALICE
Collaboration. The AHCAL prototype consists of a 38-layer sandwich structure of
steel plates and 7608 scintillator tiles that are read out by
wavelength-shifting fibres coupled to SiPMs. The signal is amplified and shaped
with a custom-designed ASIC. A calibration/monitoring system based on LED light
was developed to monitor the SiPM gain and to measure the full SiPM response
curve in order to correct for non-linearity. Ultimately, the physics goals are
the study of hadronic shower shapes and testing the concept of particle flow.
The technical goal consists of measuring the performance and reliability of
7608 SiPMs. The AHCAL prototype was commissioned in test beams at DESY, CERN
and FNAL, and recorded hadronic showers, electron showers and muons at
different energies and incident angles.Comment: 6 pages, 19 figures, LCWS2010 Proceedin
CLIC e+e- Linear Collider Studies - Input to the Snowmass process 2013
This paper addresses the issues in question for Energy Frontier Lepton and
Gamma Colliders by the Frontier Capabilities group of the Snowmass 2013 process
and is structured accordingly. It will be accompanied by a paper describing the
Detector and Physics studies for the CLIC project currently in preparation for
submission to the Energy Frontier group.Comment: Submitted to the Snowmass process 2013. arXiv admin note: substantial
text overlap with arXiv:1208.140
Higgs Physics at future Linear Colliders - A Case for precise Vertexing
The discovery of a Higgs boson by the experiments at the LHC marks a major
breakthrough in particle physics, with far-reaching consequences for our
understanding of the fundamental principles of our Universe. To fully explore
this unique particle, experiments at high-energy electron-positron colliders
are being planned, providing substantial added benefit over the capabilities of
the LHC alone, such as model-independent measurements of couplings, constraints
on invisible decays and precise measurements of the self-coupling. This
contribution summarizes the Higgs physics program at such future facilities,
highlighting in particular also the role of precise vertexing in achieving the
ambitious goals of these experiments.Comment: 9 pages, 4 figures, to be published in the proceedings of the 22nd
International Workshop on Vertex Detectors VERTEX 2013, Lake Starnberg,
Germany, September 2013, v2 updated references. arXiv admin note: substantial
text overlap with arXiv:1211.724
CLIC e+e- Linear Collider Studies
This document provides input from the CLIC e+e- linear collider studies to
the update process of the European Strategy for Particle Physics. It is
submitted on behalf of the CLIC/CTF3 collaboration and the CLIC physics and
detector study. It describes the exploration of fundamental questions in
particle physics at the energy frontier with a future TeV-scale e+e- linear
collider based on the Compact Linear Collider (CLIC) two-beam acceleration
technique. A high-luminosity high-energy e+e- collider allows for the
exploration of Standard Model physics, such as precise measurements of the
Higgs, top and gauge sectors, as well as for a multitude of searches for New
Physics, either through direct discovery or indirectly, via high-precision
observables. Given the current state of knowledge, following the observation of
a \sim125 GeV Higgs-like particle at the LHC, and pending further LHC results
at 8 TeV and 14 TeV, a linear e+e- collider built and operated in
centre-of-mass energy stages from a few-hundred GeV up to a few TeV will be an
ideal physics exploration tool, complementing the LHC. Two example scenarios
are presented for a CLIC accelerator built in three main stages of 500 GeV, 1.4
(1.5) TeV, and 3 TeV, together with the layout and performance of the
experiments and accompanied by cost estimates. The resulting CLIC physics
potential and measurement precisions are illustrated through detector
simulations under realistic beam conditions.Comment: Submitted to the European Strategy Preparatory Grou
Shower development of particles with momenta below 10 GeV in a highly granular scintillator-tungsten hadron calorimeter
A hadron sampling calorimeter with tungsten absorber is proposed for experiments at a future multi-TeV e^+e^- collider, such as the Compact Linear Collider (CLIC). Tungsten is a dense material, which has the advantage of providing sufficient depth for containing high energy hadrons, while limiting the diameter of the HCAL and of the surrounding solenoid. To test such a detector in real conditions, a large fine grained hadron calorimeter prototype with tungsten absorber plates and scintillator tiles read out by silicon photomultipliers was built and exposed to particle beams at CERN. Preliminary results obtained with the low momentum (p@?10GeV) electron, pion and proton data are presented. The analysis includes energy resolution measurements and studies of shower shapes. The results are compared with geant4 simulation models
Description of the signal and background event mixing as implemented in the Marlin processor OverlayTiming
This note documents OverlayTiming, a processor in the Marlin software frame- work. OverlayTiming can model the timing structure of a linear collider bunch train and offers the possibility to merge simulated physics events with beam-beam background events. In addition, a realistic structure of the detector readout can be imitated by defining readout time windows for each subdetector
The CALICE Software Framework and operational Experience
The CALICE collaboration is developing calorimeters for a future linear
collider, and has collected a large amount of physics data during test beam
efforts. For the analysis of these data, standard software available for linear
collider detector studies is applied. This software provides reconstruction of
raw data, simulation, digitization and data management, which is based on grid
tools. The data format for analysis is compatible with the general linear
collider software. Moreover, existing frameworks such as Marlin are employed
for the CALICE software needs. The structure and features of the software
framework are reported here as well as results from the application of this
software to test beam data.Comment: 4 pages, 5 figures, prepared for the IEEE Nuclear Science Symposium,
Knoxville, TN, USA, 30 Oct - 6 Nov 201