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Your search keyword '"Pelizzo M"' showing total 5 results
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5 results on '"Pelizzo M"'

1. Only-phase Popov action: thermodynamic derivation and superconducting electrodynamics.

Author

Salasnich, L, Pelizzo, M G, and Lorenzi, F

Subjects
*ELECTRODYNAMICS, *ELECTROMAGNETIC coupling, *ELECTROMAGNETIC fields, *SUPERFLUIDITY, *SUPERCONDUCTORS, *ELECTROSTATIC fields
Abstract

We provide a thermodynamic derivation of the only-phase Popov action functional, which is often adopted to study the low-energy effective hydrodynamics of a generic nonrelativistic superfluid. It is shown that the crucial assumption is the use of the saddle point approximation after neglecting the quantum-pressure term. As an application, we analyze charged superfluids (superconductors) coupled to the electromagnetic field at zero temperature. Our only-phase and minimally-coupled theory predicts the decay of the electrostatic field inside a superconductor with a characteristic length much smaller than the London penetration depth of the static magnetic field. This result is confirmed also by a relativistic only-phase Popov action we obtain from the Klein–Gordon Lagrangian. [ABSTRACT FROM AUTHOR]

Published
2024
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2. Design of MIRA, a low-noise pixelated ASIC for the readout of micro-channel plates

Author

Fabbrica, E., Carminati, M., Butta, D., Uslenghi, M., Fiorini, M., Corso, A. J., Pelizzo, M. G., and Fiorini, C.

Subjects
visible and IR photons, Front-end electronics for detector readout, Pixelated detectors and associated VLSI electronics, Detectors for UV, visible and IR photons, Hybrid detectors, Detectors for UV, Instrumentation, Mathematical Physics
Abstract

We present the design of the first prototype of MIRA (MIcro-channel plate Readout ASIC) that has been designed to read out Micro-Channel Plates (MCP), in particular for UV spectroscopy. MIRA will be able to detect the cloud of electrons generated by each photon interacting with the MCP, sustaining high local and global count rates to fully exploit the MCP intrinsic dynamic range with low dead time. The main rationale that guided the electronics design is the reduction of the input Equivalent Noise Charge (ENC) in order to allow operations with lower MCP gain, thus improving its lifetime, crucial aspect for long missions in space. MIRA features two selectable analog processing times, 133 ns or 280 ns (i.e. fast mode or slow mode), granting a count rate per pixel of 100 kcps. Moreover, it shows an Equivalent Noise Charge ENC = 17 e r m s − . A spatial resolution of 35 μm and an operation with zero dead time, due to the readout, are targeted. The low noise, high count rate and high spatial resolution requirements are expected by keeping a compact pixel size (35 μm × 35 μm) for a total of 32 × 32 pixels in a 2 mm × 2 mm ASIC area. In this work, the ASIC design is described.

Published
2022
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