154 research outputs found
A Large TPC Prototype with MPGD Readout: Status and Plans
The use of a TPC in future collider experiments needs significant research
and development. Within the EUDET program an infrastructure has been designed
and built to allow the efficient testing of TPC prototypes under realistic
conditions. The infrastructure consists of a test beam facility, located at
DESY Hamburg, and a multi-purpose TPC field cage.Comment: Conference LCES 2008, Chicag
A Lightweight Field Cage for a Large TPC Prototype for the ILC
We have developed and constructed the field cage of a prototype Time
Projection Chamber for research and development studies for a detector at the
International Linear Collider. This prototype has an inner diameter of 72 cm
and a length of 61 cm. The design of the field cage wall was optimized for a
low material budget of 1.21 % of a radiation length and a drift field
homogeneity of Delta(E)/(E) less or equal 10^-4. Since November 2008 the
prototype has been part of a comprehensive test beam setup at DESY and used as
a test chamber for the development of Micro Pattern Gas Detector based readout
devices.Comment: 16 pages, 13 figures, 3 table
Beam Test with a GridGEM TPC Prototype Module
The International Large Detector (ILD) --a detector concept for the
International Linear Collider (ILC)-- foresees a Time Projection Chamber (TPC)
as its main tracking detector. Currently, the R&D efforts for such a TPC focus
on studies using a large prototype that can accommodate up to seven read-out
modules which are comparable to the ones that would be used in the final ILD
TPC. The DESY TPC group has developed such a module using GEMs for the gas
amplification, which are mounted on thin ceramic frames. The module design and
first results of a test beam campaign are presented.Comment: 6 pages, 11 figures, prepared for LCWS 2011 proceeding
The Charge Collection Properties of CVD Diamond
The charge collection properties of CVD diamond have been investigated with
ionising radiation. In this study two CVD diamond samples, prepared with
electrical contacts have been used as solid state ionisation chambers. The
diamonds have been studied with beta particles and 10 keV photons, providing a
homogeneous ionisation density and with protons and alpha particles which are
absorbed in a thin surface layer. For the latter case a strong decrease of the
signal as function of time is observed, which is attributed to polarisation
effects inside the diamond. Spatially resolved measurements with protons show a
large variation of the charge collection efficiency, whereas for photons and
minimum ionising particles the response is much more uniform and in the order
of 18%. These results indicate that the applicability of CVD diamond as a
position sensitive particle detector depends on the ionisation type and appears
to be promising for homogeneous ionisation densities as provided by
relativistic charged particles.Comment: 26 pages (Latex), submitted to NIM
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
International Linear Collider reference design report: ILC Global Design Effort and World Wide Study
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
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