Riccardo Ciolini

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This paper revisits the problem of shielding low-frequency high magnetic fields. Such fields are encountered in the domain of electromechanical energy conversion particularly during railgun operation. Using finite-element analysis, we investigate, separately, the mechanism of redirection of the magnetic flux due to induced eddy currents and the magnetic(More)
This paper deals with experiments and calculations performed in order to investigate the influence of the electromagnetic hardening of payloads in a railgun. This is a complex task: besides the large amplitudes of the in-bore magnetic fields due to the pulsed current, the exit of the projectile from the muzzle and the consequences of plasma arcs have to be(More)
This paper focuses on the measurement of electromagnetic interference (EMI) from high-power systems characterized by fast and intense electromagnetic transients, such those encountered in the operation of rail electromagnetic launchers. In order to develop a preliminary measurement analysis, an experimental setup was assembled consisting in a single(More)
A neutron dosemeter which offers instant read-out has been developed for nuclear criticality accidents. The system is based on gels containing emulsions of superheated dichlorodifluoromethane droplets, which vaporise into bubbles upon neutron irradiation. The expansion of these bubbles displaces an equivalent volume of gel into a graduated pipette,(More)
Experimental activities are underway at INFN Legnaro National Laboratories (LNL) (Padua, Italy) and Pisa University aimed at angular-dependent neutron energy spectra measurements produced by the (9)Be(p,xn) reaction, under a 5MeV proton beam. This work has been performed in the framework of INFN TRASCO-BNCT project. Bonner Sphere Spectrometer (BSS), based(More)
The MSAC is a stack of grids that gives rise, when biased at high voltage, to four planar gas proportional counters connected each other. In spite of the low gas gain of each counter (about 100), the final gain can easily overcome 10. Thanks to such high gain, the MSAC can detect single electrons by using fast front-end electronics to process the current(More)
The Legnaro National Laboratories (LNL) of the Italian National Institute of Nuclear Physics (INFN) are developing a neutron source within the SPES-BNCT project. An accelerator-based, high-flux thermal neutron beam facility is planned for the experimental treatment of skin melanoma. Neutrons are produced via the Be(p,n) reaction by bombarding a 1 mm thick(More)
High-energy x-rays produced by radiotherapy accelerators operating at potentials above 10 MV may activate the air via (γ, n) reactions with both oxygen and nitrogen. While the activation products are relatively short-lived, personnel entering the accelerator room may inhale some radioactive air, which warrants internal dosimetry assessments. This work(More)
The application of ionizing radiations in different fields requires the use of equipment capable of detecting their presence or quantifying them. Detectors of the most different shapes, composition and characteristics are required to cover the full range of application of ionizing radiations. At present, thermoluminescent detectors (TLD) are the most widely(More)
Anthropomorphic tissue-equivalent hand phantoms were achieved to measure the extremity dose involved in Zevalin (90)Y-labelling and patient delivering procedure for radioimmunotherapy treatment of non-Hodgkin lymphoma. The extremity doses to hands and wrists of operators were measured by using thermoluminescent detectors mounted on the developed phantoms.(More)