Real-Time Monitoring and data management for underground metrology : a LSBB key factor for interdisciplinaries studies
Julien Poupeney, Alain Cavaillou
The LSBB is an exceptional site to make several experiments in different application field like geophysics, astrophysics, hydrogeology etc …The underground laboratory offers an opportunity to set up your measurement inside but what about the data ? How is it possible to manage your device from your office and to see what happen around it ?
In order to answer at these questions the LSBB has developed his network architecture to make the access from anywhere through a VPN (Virtual Private Network) using a personal account registered on the LSBB’s firewall. In other words it is impossible to have an access on the LSBB’s network without an authorization. Moreover although different teams are allowed to use the VPN, each team has got an access for their data only.
Soft Error Effects Issues and Mitigation
Sort errors from neutrons and protons at sea level affect all sub-micron (nanometer) electronic devices (integrated circuits). Discussed here is the history of testing, design, and methods for mitigation of these upsets in Xilinx FPGA devices.
THE SIMPLE DARK MATTER SEARCH : PRESENT AND FUTURE
Miguel Felizardo, pdf file
We review the recently-completed Phase II measurements of SIMPLE, and describe the Phase III currently in progress.
NEUTRON BACKGROUND ESTIMATES IN LSBB facility
Ana Cristina Fernandes, pdf file
The SIMPLE project looks for nuclear recoil events generated by rare dark matter scattering interactions. Nuclear recoils are also produced by more prevalent cosmogenic neutron interactions. While the rock overburden shields against (μ,n) neutrons to below 10-8 cm-2s-1, it itself contributes via radio-impurities.
Additional shielding of these is similar, both suppressing and contributing neutrons.
We report on the MCNP estimation of the on-detector neutron backgrounds for the SIMPLE experiment located in the GESA facility of the LSBB , and its use in defining additional shielding for measurements which have led to a reduction in the extrinsic neutron background to levels of <5x10-3 evts/kgd).
LOW NOISE CHARACTERIZATION OF THE NEUTRON MULTISPHERE SPECTROMETER HERMEIS AND FIRST ENVIRONMENTAL MEASUREMENTS AT MOUNTAIN ALTITUDES
A. Cheminet, V. Lacoste, G. Hubert, D. Boscher, D. Boyer and J. Poupeney, pdf file
A new neutron multisphere system extended to high energies was tested at the Low Noise Underground Laboratory (LSBB) facilities. First, the intrinsic noise of the 3He high pressure gas-filled detectors was determined at 500 m underground. Then, the spectrometer was used to measure the atmospheric neutron spectra respectively at +500 m and +1000 m above sea level. The experimental results were compared to analytical ones calculated with the EXPACS software.
Alpha contamination in electronic devices : how a predictive approach can help a low noise experimental approach
Alpha contamination has become a major concern in integrated circuits. To qualify packaging solutions for commercial, industrial, and aerospace/defense components, various methodologies can be used. In this paper, SER simulation is shown to be a tool to help the analysis of alpha-induced SER in electronic devices.
TEMPORAL TOMOGRAPHY DENSITOMETRIC BY THE MEASURE OF MUONS
Stéphane GAFFET, Pierre SALIN, Fanny HIVERT, José BUSTO
The purpose of this project is to develop a new field of study in the geosciences, using a very promising and innovative detector from particle physics, for the temporal tomography of sub-surface up to a few hundred meters of thickness. The field of applications concern rock stability and rheological properties survey, e.g. tunnel collapse, cliff, volcanic cone and landslide monitoring. We develop the methodology (instrumentation, measurement, measurement protocol, direct modeling and tomographic inversion) necessary to map the density of rock mass, with a kilometric lateral extension under a multi-hectometric overburden.
Bure Underground Research Laboratory : role in the radwaste management and 2012-2015 programme
Patrick Lebon, pdf file
Underground Research Laboratories (URL) around the world are used extensively to qualify geological sites and to improve R&D programmes for radwaste disposal. In France, Andra has been developing such a URL at Bure (Meuse) since 2004. To this date a 1000-m long drift network is available for experiments
According to the French national plan for the management of radioactive materials and wastes, the next project milestone is to prepare the scientific and technical bases for a license application, which is to be submitted by 2015.