A new neutron detector based on Micromegas technology has been developed for the measurement of the simulated neutron spectrum in the ADS project. After the presentation of simulated neutron spectra obtained in the interaction of 140 MeV protons with the spallation target inside the TRIGA core, a full description of the new detector configuration is given. The advantage of this detector compared to conventional neutron flux detectors and the results obtained with the first prototype at the CELINA 14 MeV neutron source facility at CEA-Cadarache are presented. The future developments of operational Piccolo-Micromegas for fast neutron reactors are also described.

Scanning experiments on a very large scale integrated (VLSI) circuit are presented using the picosecond ultrasonics technique. This optical nondestructive technique is based on ultrasound generation and detection by ultrashort laser pulses. The experimental setup and methodology are described. The influence of the protection layer for passivated circuits on the experimental results is described and illustrated by experimental data. In order to help in the interpretation of the experimental analysis of microelectronic devices, a simulation tool was developed.

No abstract

No abstract

We present an analysis of a VLSl Circuit using the picosecond ultrasonics technique. This optical non-destructive technique is based on ultrasound generation and detection by ultrashort laser pulses. The experimental setup and methodology are analyzed. The influence of the protection layer for passivated circuits on the experimental results is described. The in-depth and lateral resolutions of the technique are illustrated by experimental results.