The case of the internal target for the hyper-nuclear experiment of the PANDA (antiproton Annihilation at Darmstadt) Collaboration at the High Energy Storage Ring of Facility for Antiproton and Ion ...Research is illustrated. After a discussion of the problems arising from the interaction of a solid internal target with an antiproton beam, the design of material, shape and sizes of a target satisfying the experimental requirements is presented. The techniques used to produce a prototype of this target are illustrated. Then the results of the tests performed on the prototype for investigating the properties (purity, radiation hardness, structure modifications after shaping) are reported and the plan of the future activity is pointed out.
Mobility coupling effects due to remote Coulomb scattering (RCS) are demonstrated for the first time in FD-SOI CMOS devices subjected to front and back interface electrical degradation. The evolution ...with stress time of the front and back threshold voltages as well as of the low field mobility values has been obtained. The front and back interface mobility degradations were then correlated to the stress induced interfacial charge variations for each stressed interface. This enabled the clear demonstration of the existence of mobility coupling effects between the front and back interface by RCS through the silicon film.
•Comprehensive analysis of MOSFET subthreshold swing at cryogenic temperature.•Compact analytical expression for the subthreshold swing as a function of temperature.•Generalized subthreshold swing ...formulation with conductivity function within Kubo-Greenwood formalism.
A comprehensive analysis of the MOSFET subthreshold swing for a 2D subband with exponential band tail of states is first proposed. Then, a compact analytical expression for the subthreshold swing as a function of temperature is derived, well accounting for both its cryogenic temperature saturation and classical higher temperature increase. Moreover, a generalized subthreshold swing calculation applicable to the situation where the MOSFET drain current should be evaluated from the conductivity function within the Kubo-Greenwood formalism is developed.
This work presents a study of the thermal sensitivity of p-n short silicon diodes represented by the temperature coefficient of current (TCC) for thermal sensing applications. It proposes an ...analytical model (AM) of the TCC of p-n short silicon diodes under low-level injections and in the temperature range of 300-400 K. First, the TCC is studied at diffusion and recombination regimes and it is discriminated between different physical contributions. Then, it is followed by a discussion on the origins and influences of these contributions to provide a usable and simplified analytical expression of the TCC. Finally, the proposed AM is compared to technology computer-aided design (TCAD) simulations and experimental results at 300-400 K. It shows a strong correlation for different designs of p-n short diodes.
Low frequency excess noise associated to gate-induced floating body effect is for the first time reported in Partially Depleted SOI MOSFETs with ultrathin gate oxide. This was investigated with ...respect to floating body devices biased in linear regime. Due to a body charging from the gate, a Lorentzian-like noise component superimposes to the conventional 1/f noise spectrum. This excess noise exhibits the same behavior as the Kink-related excess noise previously observed in Partially Depleted devices in saturation regime.
The main physico-chemical modifications during the cooking process of laboratory-made biscuits were monitored at different cooking times (0, 2, 4, 6, 8, 10, 12 min). Moisture content, surface colours ...and textures were measured. In addition the evolution of the flavour release was performed by means of an electronic nose equipped with 10 metal-oxide sensors. Multivariate statistical analyses were performed to distinguish samples as a function of their physico- chemical characteristics. The electronic nose permitted differentiation between raw, under cooked, wellcooked and over cooked products. Similar and complementary information was obtained considering both electronic nose data and traditional physico-chemical cooking indexes. The obtained results showed that it could be feasible to monitor the changes in the biscuit's aroma and cooking level directly during the process by using an electronic nose with a simplified gas sensor array, as well as allowing the optimization of the technological parameters. --Key words: biscuit, colour, cooking process, electronic nose, texture--
An innovative technique to access the nuclear matrix elements entering the expression of the life time of the double beta decay by relevant cross sections measurements of double charge exchange ...reactions is proposed. A key aspect of the project is the use of the MAGNEX large acceptance magnetic spectrometer, for the detection of the ejectiles, and of the LNS K800 Superconducting Cyclotron (CS), for the acceleration of the required high resolution and low emittance heavyion beams, already in operation at INFN Laboratory Nazionali del Sud in Catania (Italy).
•Lambert-W function-based MOSFET parameter extraction down to cryogenic temperature.•Lambert-W function-based modeling of drain current MOSFET characteristics using classical mobility law down to ...4.2 K.•Main FDSOI MOSFET parameters extracted versus temperature and gate length.•Mobility degradation at short channel length due to increased neutral defect scattering.
The applicability of the Lambert-W function-based parameter extraction methodology is demonstrated for 28 nm FDSOI MOSFETs down to deep cryogenic temperatures (4.2 K). The Lambert-W function enables to accurately model the inversion charge and drain current MOSFET characteristics from weak to strong inversion, while using the classical mobility law down to liquid helium temperature. The main MOSFET parameters were extracted versus temperature and gate length, showing the temperature independence of short channel effects and the strong mobility degradation at short channel length due to increased neutral defect scattering.
The Double Hypernuclei are the only systems that allow to study the hyperon-hyperon interaction because the hyperon-hyperon scattering experiments are at present impossible. Experimental data are ...still very scarce, due to the difficulty of producing the doubly strange hyperon Ξ−, from which a double hypernucleus is formed. The formation of such a hypernucleus proceeds through a multiple-step process and the measurement of the relevant parameters (e.g. energy separation and decay branching ratios) requires high statistics. The PANDA Collaboration planned to exploit the intense beam of the HESR machine at the future facility FAIR to produce Ξ− hyperons from antiproton annihilation in nuclei. A 12C target will be inserted inside the ring: the sizes of the target and the beam spot overlap play a crucial role to avoid serious damage of beam and detectors. The status of the art of the present data, the design of the optimized target and the tests on the prototype will be presented.
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