252 research outputs found
GARLIC: GAmma Reconstruction at a LInear Collider experiment
The precise measurement of hadronic jet energy is crucial to maximise the
physics reach of a future Linear Collider. An important ingredient required to
achieve this is the efficient identification of photons within hadronic
showers. One configuration of the ILD detector concept employs a highly
granular silicon-tungsten sampling calorimeter to identify and measure photons,
and the GARLIC algorithm described in this paper has been developed to identify
photons in such a calorimeter. We describe the algorithm and characterise its
performance using events fully simulated in a model of the ILD detector
Extraction Method of Fine Granular Performance from Scintillator Strip Electromagnetic Calorimeter
We describe an algorithm which has been developed to extract fine granularity
information from an electromagnetic calorimeter with strip-based readout. Such
a calorimeter, based on scintillator strips, is being developed to apply
particle flow reconstruction to future experiments in high energy physics.
Tests of this algorithm in full detector simulations, using strips of size 45 x
5 mm^2 show that the performance is close to that of a calorimeter with true 5
x 5 mm^2 readout granularity. The performance can be further improved by the
use of 10 x 10 mm^2 tile- shaped layers interspersed between strip layers.Comment: 11 pages, 10 figure
Fractal Dimension of Particle Showers Measured in a Highly Granular Calorimeter
We explore the fractal nature of particle showers using Monte-Carlo
simulation. We define the fractal dimension of showers measured in a high
granularity calorimeter designed for a future lepton collider. The shower
fractal dimension reveals detailed information of the spatial configuration of
the shower. %the information hidden in the details of shower spatial
configuration, It is found to be characteristic of the type of interaction and
highly sensitive to the nature of the incident particle. Using the shower
fractal dimension, we demonstrate a particle identification algorithm that can
efficiently separate electromagnetic showers, hadronic showers and
non-showering tracks. We also find a logarithmic dependence of the shower
fractal dimension on the particle energy.Comment: 4 pages, 5 figure
Druid, event display for the linear collider
Druid is a dedicated event display designed for the future electron positron
linear colliders. Druid takes standard linear collider data files and detector
geometry description files as input, it can visualize both physics event and
detector geometry. Many displaying options are provided by Druid, giving easy
access to different information. As a versatile event display, Druid supports
all the latest linear collider detector models, Silicon Detector and
International Large Detector, as well as the calorimeter prototypes operated in
the CALICE test beam experiments. It has been utilized in many studies such as
the verification of detector geometry, analysis of the simulated full events
and test beam data as well as reconstruction algorithm development and code
debugging
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