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Cover page of the
June 2002 CERN Courier: The top image shows an Artist's impression of the BepiColombo spacecraft arrriving at the planet Mercury. ESA, European Space Agency The central image shows the geometry of the CMS detector in preparation for CERN's Large Hadron Collider visualized with the Iguana system. The CMS Collaboration The bottom image is a cancer brachytherapy applicator together with the dose distribution in human tissue. National Institute for Cancer Research, Genova & INFN Genova |
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The ATLAS collaboration is using Geant4 to simulate its detector and
its test beams. A large collections of comparison of test beam data
with Geant4 have been undertaken. This picture shows a view of the
ATLAS detector's outer muon chambers.
The ATLAS Collaboration |
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More pictures of the ATLAS experiment
for CERN's forthcoming LHC (links to pages of the ATLAS web site).
The ATLAS Collaboration |
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Optical photons in Geant4
T.MacPhail, P.Gumplinger (TRIUMF) |
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A superficial
brachytherapy device and the resulting dose distribution, simulated with
Geant4 and analysed with CERN's Anaphe analysis tool.
National Institute for Cancer Research, Genova & INFN Genova |
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Two
years in orbit and over 1200 observations so far, XMM-Newton is now
preparing a second round of observations. An assembly of 51 mirrors,
carefully sized, formed and nested one inside another, makes XMM the most
sensitive X-ray telescope ever built. ESA's XMM-Newton derives its
name from its X-ray multi-mirror design and honours Sir Isaac Newton. This
unique X-ray observatory was launched by Ariane 5 from the European
spaceport in French Guiana on 10 December 1999.
Photo: ESA-Ducros |
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ZEPLIN III (picture on the left) is a two-phase xenon experiment being built by the UK Dark
Matter Collaboration which will try to detect dark matter WIMPs from
their elastic scattering in a liquid xenon target. ZEPLIN III will
measure both the scintillation and ionisation signals produced by nuclear
recoils potentially caused by WIMPs. The Geant4 model simulates
particle interactions in the detector, prompt scintillation as well
as the production and emission of ionisation charge at the surface
of the liquid by means of an applied electric field. In the gaseous xenon
above the liquid, this charge is converted into electroluminescence photons
which are tracked and detected by an array of photomultiplier tubes
(picture on the right).
H.Araujo (Imperial College London & UK Dark Matter Collaboration) |
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Geant4 geometry model of a LISA Science Module spacecraft (picture on the
left) used for test-mass charging simulations. LISA is a joint ESA/NASA
mission (launch in 2013) designed to detect gravitational waves by means of
interferometric measurements in space. These are performed between
three spacecraft flying 5 million km apart in a triangular constellation.
Exposed to energetic particles in the space environment, the isolated
test masses aboard the LISA spacecraft will accumulate electrostatic
charge, which can affect the sensitivity to gravitational waves.
H.Araujo, P.Wass (Imperial College London) |
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Picture on the left: Simulation of the nuclear reaction of a cosmic-ray proton in one of the LISA inertial sensors. These events can lead to a large number of charged particles being ejected from, or imparted into the test masses.
Picture on the right:
H.Araujo, P.Wass (Imperial College London) |
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Picture on the left: Geant4 geometry of the LISA Pathfinder spacecraft. The Pathfinder is an ESA mission (launch in 2008) aimed at demonstrating key technologies required for the success of LISA. The model was used to simulate test-mass charging in the inertial sensors of the LISA Technology Package (LTP).
Picture on the right:
P.Wass and H.Araujo (Imperial College London) |
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Using Geant4 to simulate the response
of Baksan Underground Scintillation Telescope (BUST) for both
single cosmic ray muons and their bundles. The goal of this
calculations is to check a technique for Very High Energy (VHE)
(100 TeV) muons selection and to compare results with
experimental data. Excess of VHE muons can be the evidence for
new physics existence at PeV energies (that corresponds to TeV
energies in the center-of-mass system).
V.N. Bakatanov et al. "Study of very high energy
muons on the basis of data of the Baksan Underground
Scintillation Telescope" |
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Poster prepared by CERN technology transfer for Geant4.
CERN, Geneva |