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# Search results

75 records were found.

## Recent developments of a Micromegas detector for neutron physics

After a short description of the Micromegas principle, a concept of new neutron detectors based on this technique is presented. It is illustrated by an overall picture of the use of these detectors in different domains such as: nuclear physics, inertial fusion and industrial applications. A particular description will be devoted to two topics. The first one concerns the compact detector named ldquoPiccolo- Micromegasrdquo. This detector, capable of measuring a neutron flux in a broad range of neutron energies, is developed for the measurements of the in-core neutrons flux of future generations of nuclear reactors. The second one based on the new micro-bulk concept is developed for a monitoring detector of a neutron beam.

## Ultra low energy results and their impact to dark matter and low energy neutrino physics

Comment: 14 pages,16 figures

## A novel large-volume spherical detector with proportional amplification read-out

A new type of radiation detector based on a spherical geometry is presented. The detector consists of a large spherical gas volume with a central electrode forming a radial electric field. Charges deposited in the conversion volume drift to the central sensor where they are amplified and collected. We introduce a small spherical sensor located at the center acting as a proportional amplification structure. It allows high gas gains to be reached and operates in a wide range of gas pressures. Signal development and the absolute amplitude of the response are consistent with predictions. Sub-keV energy threshold with good energy resolution is achieved. This new concept has been proven to operate in a simple and robust way and allows reading large volumes with a single read-out channel. The detector performance presently achieved is already...

## NOSTOS: a spherical TPC to detect low energy neutrinos

A novel low-energy (~few keV) neutrino-oscillation experiment NOSTOS, combining a strong tritium source and a high pressure spherical Time Projection Chamber (TPC) detector 10 m in radius has been recently proposed. The oscillation of neutrinos of such energies occurs within the size of the detector itself, potentially allowing for a very precise (and rather systematics-free) measure of the oscillation parameters, in particular, of the smaller mixing angle $\theta_{13}$, which value could be determined for the first time. This detector could also be sensitive to the neutrino magnetic moment and be capable of accurately measure the Weinberg angle at low energy. The same apparatus, filled with high pressure Xenon, exhibits a high sensitivity as a Super Nova neutrino detector with extra galactic sensitivity. The outstanding benefits of th...

## NOSTOS: a spherical TPC to detect low energy neutrinos

Comment: talk given at Workshop on Low Radioactivity Techniques, LRT2004, Sudbury, Canada, December 2004. 9 pages, 5 figures

## A novel large-volume Spherical Detector with Proportional Amplification read-out

Comment: 13 pages, 13 figures

## Progress on a spherical TPC for low energy neutrino detection

The new concept of the spherical TPC aims at relatively large target masses with low threshold and background, keeping an extremely simple and robust operation. Such a device would open the way to detect the neutrino-nucleus interaction, which, although a standard process, remains undetected due to the low energy of the neutrino-induced nuclear recoils. The progress in the development of the fist 1 m$^3$ prototype at Saclay is presented. Other physics goals of such a device could include supernova detection, low energy neutrino oscillations and study of non-standard properties of the neutrino, among others.

## Progress on a spherical TPC for low energy neutrino detection

Comment: 3 pages, talk given at the 9th Workshop on Topics in Astroparticle and Underground Physics, Zaragoza, September 10-14