5,281 research outputs found
Flavor Physics and CP Violation at LHC
Flavor Physics at LHC will contribute significantly to the search for New
Physics via precise and complementary measurements of CKM angles and the study
of loop decays. Here we present the expected experimental sensitivity and
physics performance of the LHC experiments that will to B-physics
The MEGA Advanced Compton Telescope Project
The goal of the Medium Energy Gamma-ray Astronomy (MEGA) telescope is to
improve sensitivity at medium gamma-ray energies (0.4-50 MeV) by at least an
order of magnitude over that of COMPTEL. This will be achieved with a new
compact design that allows for a very wide field of view, permitting a
sensitive all-sky survey and the monitoring of transient and variable sources.
The key science objectives for MEGA include the investigation of cosmic
high-energy particle accelerators, studies of nucleosynthesis sites using
gamma-ray lines, and determination of the large-scale structure of galactic and
cosmic diffuse background emission. MEGA records and images gamma-ray events by
completely tracking both Compton and pair creation interactions in a tracker of
double-sided silicon strip detectors and a calorimeter of CsI crystals able to
resolve in three dimensions. We present initial laboratory calibration results
from a small prototype MEGA telescope.Comment: 7 pages LaTeX, 5 figures, to appear in New Astronomy Reviews
(Proceedings of the Ringberg Workshop "Astronomy with Radioactivities III"
SESAME, a third generation synchrotron light source for the Middle East region
Developed under the auspices of UNESCO, SESAME is being established as an autonomous international research centre in the Middle East/Mediterranean region. It will have as its centrepiece a 2.5 GeV third Generation synchrotron light source with 13 straight sections for insertion devices and an emittance of 26.6 nm-rad. It will provide intense radiation from the IR to hard X-rays to a community that is expected to exceed 1000 users a few years after the start of operation in 2008
Development of Silicon Strip Detectors for a Medium Energy Gamma-ray Telescope
We report on the design, production, and testing of advanced double-sided
silicon strip detectors under development at the Max-Planck-Institute as part
of the Medium Energy Gamma-ray Astronomy (MEGA) project. The detectors are
designed to form a stack, the "tracker," with the goal of recording the paths
of energetic electrons produced by Compton-scatter and pair-production
interactions. Each layer of the tracker is composed of a 3 x 3 array of 500
micron thick silicon wafers, each 6 cm x 6 cm and fitted with 128 orthogonal p
and n strips on opposite sides (470 micron pitch). The strips are biased using
the punch-through principle and AC-coupled via metal strips separated from the
strip implant by an insulating oxide/nitride layer. The strips from adjacent
wafers in the 3 x 3 array are wire-bonded in series and read out by 128-channel
TA1.1 ASICs, creating a total 19 cm x 19 cm position-sensitive area. At 20
degrees C a typical energy resolution of 15-20 keV FWHM, a position resolution
of 290 microns, and a time resolution of ~1 microsec is observed.Comment: 9 pages, 13 figures, to appear in NIM-A (Proceedings of the 9th
European Symposium on Semiconductor Detectors
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