153 research outputs found
Performance of Julia for High Energy Physics Analyses
We argue that the Julia programming language is a compelling alternative to
implementations in Python and C++ for common data analysis workflows in high
energy physics. We compare the speed of implementations of different workflows
in Julia with those in Python and C++. Our studies show that the Julia
implementations are competitive for tasks that are dominated by computational
load rather than data access. For work that is dominated by data access, we
demonstrate an application with concurrent file reading and parallel data
processing.Comment: 16 pages, 4 pages, 1 table, 3 code listing
A Study of the Impact of High Cross Section ILC Processes on the SiD Detector Design
The SiD concept is one of two proposed detectors to be mounted at the
interaction region of the International Linear Collider (ILC). A substantial
ILC background arises from low transverse momentum
pairs created by the interaction of the
colliding beams' electromagnetic fields. In order to provide hermeticity and
sensitivity to beam targeting parameters, a forward Beamline Calorimeter
(BeamCal) is being designed that will provide coverage down to 5 mrad from the
outgoing beam trajectory, and intercept the majority of this pair background.
Using the SiD simulation framework, the effect of this pair background on the
SiD detector components, especially the vertex detector (VXD) and forward
electromagnetic calorimeter (FCAL), is explored. In the case of the FCAL,
backgrounds from Bhabha and two-photon processes are also considered. The
consequence of several variants of the BeamCal geometry and ILC interaction
region configuration are considered for both the vertex detector and BeamCal
performance
The International Linear Collider Technical Design Report - Volume 4: Detectors
The International Linear Collider Technical Design Report (TDR) describes in
four volumes the physics case and the design of a 500 GeV centre-of-mass energy
linear electron-positron collider based on superconducting radio-frequency
technology using Niobium cavities as the accelerating structures. The
accelerator can be extended to 1 TeV and also run as a Higgs factory at around
250 GeV and on the Z0 pole. A comprehensive value estimate of the accelerator
is give, together with associated uncertainties. It is shown that no
significant technical issues remain to be solved. Once a site is selected and
the necessary site-dependent engineering is carried out, construction can begin
immediately. The TDR also gives baseline documentation for two high-performance
detectors that can share the ILC luminosity by being moved into and out of the
beam line in a "push-pull" configuration. These detectors, ILD and SiD, are
described in detail. They form the basis for a world-class experimental
programme that promises to increase significantly our understanding of the
fundamental processes that govern the evolution of the Universe.Comment: See also http://www.linearcollider.org/ILC/TDR . The full list of
signatories is inside the Repor
Lycoris -- a large-area, high resolution beam telescope
A high-resolution beam telescope is one of the most important and demanding
infrastructure components at any test beam facility. Its main purpose is to
provide reference particle tracks from the incoming test beam particles to the
test beam users, which allows measurement of the performance of the
device-under-test (DUT). \LYCORIS, a six-plane compact beam telescope with an
active area of 10\SI{10}{\square\centi\metre} (extensible to
10\SI{20}{\square\centi\metre}) was installed at the \DIITBF in 2019,
to provide a precise momentum measurement in a \SI{1}{\tesla} solenoid magnet
or to provide tracking over a large area. The overall design of \LYCORIS will
be described as well as the performance of the chosen silicon sensor. The
\SI{25}{\micro\metre} pitch micro-strip sensor used for \LYCORIS was originally
designed for the \SID detector concept for the International Linear Collider.
It adopts a second metallization layer to route signals from strips to the
bump-bonded \KPIX ASIC and uses a wire-bonded flex cable for the connection to
the DAQ and the power supply system. This arrangement eliminates the need for a
dedicated hybrid PCB. Its performance was tested for the first time in this
project. The system has been evaluated at the \DIITBF in several test-beam
campaigns and has demonstrated an average single-point resolution of
\SI{7.07}{\micro\meter}.Comment: 43 pages, 37 figure
Summary and Conclusions of the First DESY Test Beam User Workshop
On October 5/6, 2017, DESY hosted the first DESY Test Beam User Workshop [1]
which took place in Hamburg. Fifty participants from different user
communities, ranging from LHC (ALICE, ATLAS, CMS, LHCb) to FAIR (CBM, PANDA),
DUNE, Belle-II, future linear colliders (ILC, CLIC) and generic detector R&D
presented their experiences with the DESY II Test Beam Facility, their concrete
plans for the upcoming years and a first estimate of their needs for beam time
in the long-term future beyond 2025. A special focus was also on additional
improvements to the facility beyond its current capabilities
Developing a Monolithic Silicon Sensor in a 65 nm CMOS Imaging Technology for Future Lepton Collider Vertex Detectors
Monolithic CMOS sensors in a 65 nm imaging technology are being investigated
by the CERN EP Strategic R&D Programme on Technologies for Future Experiments
for an application in particle physics. The appeal of monolithic detectors lies
in the fact that both sensor volume and readout electronics are integrated in
the same silicon wafer, providing a reduction in production effort, costs and
scattering material. The Tangerine Project WP1 at DESY participates in the
Strategic R&D Programme and is focused on the development of a monolithic
active pixel sensor with a time and spatial resolution compatible with the
requirements for a future lepton collider vertex detector. By fulfilling these
requirements, the Tangerine detector is suitable as well to be used as
telescope planes for the DESY-II Test Beam facility. The project comprises all
aspects of sensor development, from the electronics engineering and the sensor
design using simulations, to laboratory and test beam investigations of
prototypes. Generic TCAD Device and Monte-Carlo simulations are used to
establish an understanding of the technology and provide important insight into
performance parameters of the sensor. Testing prototypes in laboratory and test
beam facilities allows for the characterization of their response to different
conditions. By combining results from all these studies it is possible to
optimize the sensor layout. This contribution presents results from generic
TCAD and Monte-Carlo simulations, and measurements performed with test chips of
the first sensor submission.Comment: 7 pages, 8 figures, submitted to IEEE Xplore as conference record for
2022 IEEE NSS/MIC/RTS
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