luigi campajola - Academia.edu (original) (raw)
Papers by luigi campajola
International Journal of Modern Physics A
NUMEN proposes an innovative technique to access the nuclear matrix elements entering the express... more NUMEN proposes an innovative technique to access the nuclear matrix elements entering the expression of the lifetime of the double beta decay by cross-section measurements of heavy-ion induced Double Charge Exchange (DCE) reactions. Despite the fact that the two processes, namely neutrinoless double beta decay and DCE reactions, are triggered by the weak and strong interaction respectively, important analogies are suggested. The basic point is the coincidence of the initial and final state many-body wave functions in the two types of processes and the formal similarity of the transition operators. The main experimental tools for this project are the K800 Superconducting Cyclotron and MAGNEX spectrometer at the INFN-LNS laboratory. However, the tiny values of DCE cross-sections and the resolution requirements demand beam intensities much higher than those manageable with the present facility. The on-going upgrade of the INFN-LNS facilities promoted by the POTLNS a project in this per...
Book of Abstracts
Targeting sonic hedgehog pathway in combination with proton radiation or gamma irradiation decrea... more Targeting sonic hedgehog pathway in combination with proton radiation or gamma irradiation decreases viability of glioma cell lines .
International Journal of Modern Physics: Conference Series, 2020
Experiments of nuclear physics have been carried out at the Bern medical cyclotron, in which a be... more Experiments of nuclear physics have been carried out at the Bern medical cyclotron, in which a beam line dedicated to research activities is available. Our main goal is to upgrade this facility as a well-characterized neutron source for studies of radiation hardness and for tests of new neutron detectors. To achieve this result, preliminary measurements have been carried out among which the measurement of the incident proton energy by means of a method based on Rutherford backscattering spectroscopy. The analysis of the energy spectrum corresponding to protons elastically and inelastically backscattered by the carbon target allowed the precise identification of the excited states of 12C, including the Hoyle state. These results confirmed the Bern medical cyclotron as a reliable facility to perform research activities in the field of fundamental nuclear physics as well as of applied physics.
Optical Fiber Sensors Conference 2020 Special Edition, 2021
Radiochromic film dosimetry is a well-established technique particularly suitable for off-line do... more Radiochromic film dosimetry is a well-established technique particularly suitable for off-line dose measurements. We propose an innovative method for the determination of the dose in real-time with radiochromic films based on optoelectronic instrumentation.
Frontiers in Astronomy and Space Sciences, 2021
The goal of NUMEN project is to access experimentally driven information on Nuclear Matrix Elemen... more The goal of NUMEN project is to access experimentally driven information on Nuclear Matrix Elements (NME) involved in the neutrinoless double beta decay (0νββ) by accurate measurements of the cross sections of heavy-ion induced double charge-exchange reactions. In particular, the (18O,18Ne) and (20Ne,20O) reactions are adopted as tools for β+β+and β−β−decays, respectively. The experiments are performed at INFN–Laboratory Nazionali del Sud (LNS) in Catania using the Superconducting Cyclotron to accelerate the beams and the MAGNEX magnetic spectrometer to detect the reaction products. The measured cross sections are very low, limiting the present exploration to few selected isotopes of interest in the context of typically low-yield experimental runs. In order to make feasible a systematic study of all the candidate nuclei, a major upgrade of the LNS facility is foreseen to increase the experimental yield by more than two orders of magnitude. To this purpose, frontier technologies are ...
Physica Medica, 2019
In this work, we report on a novel approach for measuring the dose absorbed by the EBT3 Gafchromi... more In this work, we report on a novel approach for measuring the dose absorbed by the EBT3 Gafchromic™ films exposed to 1 MeV electron beam and 250 kV X-rays in the range 0.5-100 Gy. Although EBT3 is specifically designed to obtain best performance for applications where the maximum dose is less than 10 Gy, there are certain clinical applications requiring dose ranges well above this value. In order to cover wider dose ranges, further models characterized by a thinner sensitive layer and/or different chemical composition have been released. Another method exploiting the three-channel flatbed scanner to delay the saturation point of EBT3 has been also reported. The technique proposed here, aimed at extending the sensitivity of the EBT3 film to high doses up to 100 Gy while ensuring a low dose uncertainty, is based on a broadband analysis of the absorption spectrum of the film in response to irradiation. By combining a wavelength-based approach with the monitoring of two characteristic peaks of the EBT3 absorption spectrum, we demonstrated the capability of measuring the dose in the range 0.5-100 Gy with an experimental uncertainty below 4% for doses lower than 5.52 Gy and below 2% for higher dose levels. Finally, through a dynamic fitting procedure integrating the two aforesaid approaches, a total uncertainty lower than 4%, including both the experimental and fitting errors, was achieved in the whole range 0.5-100 Gy. These results are promising in view of a potential application of this technique in the field of clinical dosimetry at high dose levels.
Scientific Reports, 2019
Radiochromic film dosimetry has been widely employed in most of the applications of radiation phy... more Radiochromic film dosimetry has been widely employed in most of the applications of radiation physics for over twenty years. This is due to a number of appealing features of radiochromic films, such as reliability, accuracy, ease of use and cost. However, current radiochromic film reading techniques, based on the use of commercial densitometers and scanners, provide values of dose only after the exposure of the films to radiation. In this work, an innovative methodology for the real-time reading of radiochromic films is proposed for some specific applications. The new methodology is based on opto-electronic instrumentation that makes use of an optical fiber probe for the determination of optical changes of the films induced by radiation and allows measurements of dose with high degree of precision and accuracy. Furthermore, it has been demonstrated that the dynamic range of some kinds of films, such as the EBT3 Gafchromic films (intensively used in medical physics), can be extended ...
IEEE Transactions on Nuclear Science, 2018
Commercial-Off-The-Shelf System-on-Chip FPGAs are gaining momentum in space applications and thei... more Commercial-Off-The-Shelf System-on-Chip FPGAs are gaining momentum in space applications and their radiation characterization becomes crucial. This work targets a costeffective test setup and procedures for Total Ionization Dose testing of miniaturized complex devices. We combine Hardware and Software techniques to perform on-chip irradiation via a 90 Sr/ 90 Y electron source and assess in detail the degradation of complex SRAM FPGAs. Our methodology combines multiple sensing mechanisms with correlation analysis to facilitate modeling of effects and tuning of a custom Ring-Oscillator network for future autonomous in-flight use. Focusing on 28nm Zynq7000 devices, our results show Mrad TID tolerance with parameters' degradation in the area of 5%, zero functional errors, and nonuniform spatial response.
Scientific Reports, 2018
In this work, we report on the first demonstration of Lab on Fiber (LOF) dosimeter for ionizing r... more In this work, we report on the first demonstration of Lab on Fiber (LOF) dosimeter for ionizing radiation monitoring at ultra-high doses. The new dosimeter consists in a metallo-dielectric resonator at sub-wavelength scale supporting localized surface plasmon resonances realized on the optical fiber (OF) tip. The resonating structure involves two gold gratings separated by a templated dielectric layer of poly(methyl methacrylate) (PMMA). Two LOF prototypes have been manufactured and exposed at the IRRAD Proton Facility at CERN in Geneva to 23 GeV protons for a total fluence of 0.67 × 1016 protons/cm2, corresponding to an absorbed dose of 1.8 MGy. Experimental data demonstrated the “radiation resistance” feature of the LOF devices and a clear dependence of the reflected spectrum versus the total dose, expressed by a cumulative blue-shift of ~1.4 nm of the resonance combined with a slight increase of 0.16 dBm in the reflected spectrum. The numerical analysis carried out to correlate t...
Topics in Current Chemistry, 2016
Beyond their important economic role in commercial communications, satellites in general are crit... more Beyond their important economic role in commercial communications, satellites in general are critical infrastructure because of the services they provide. In addition to satellites providing information which facilitates a better understanding of the space environment and improved performance of physics experiments, satellite observations are also used to actively monitor weather, geological processes, agricultural development and the evolution of natural and man-made hazards. Defence agencies depend on satellite services for communication in remote locations, as well as for reconnaissance and intelligence. Both commercial and government users rely on communication satellites to provide communication in the event of a disaster that damages ground-based communication systems, provide news, education and entertainment to remote areas and connect global businesses. The space radiation environment is an hazard to most satellite missions and can lead to extremely difficult operating conditions for all of the equipment travelling in space. Here, we first provide an overview of the main components of space radiation environment, followed by a description of the basic mechanism of the interaction of radiation with matter. This is followed by an introduction to the space radiation hardness assurance problem and the main effects of natural radiation to the microelectronics (total ionizing dose, displacement damage and the single-event effect and a description of how different effects occurring in the space can be tested in on-ground experiments by using particle accelerators and radiation sources. We also discuss standards and the recommended procedures to obtain reliable results. This article is part of the Topical Collection ''Applications of Radiation Chemistry''; edited by
2016 IEEE International Symposium on Defect and Fault Tolerance in VLSI and Nanotechnology Systems (DFT), 2016
This paper discusses radiation tests on complex System-on-Chip (SoC) controllers using Low-Energy... more This paper discusses radiation tests on complex System-on-Chip (SoC) controllers using Low-Energy Protons (LEPs). The aim of this novel set of guidelines is to be also applicable to System In Package (SIP) or hybrid components that are now often used to overcome printed circuit board's real estate restrictions in Hi-Rel electronics. Despite the growing success of microcontrollers SoC in HiRel applications, general and standardized methods for Single Event Effects (SEE) testing of complex SoCs have not been widely established. This paper will propose a general methodology, structured in a modular test sequence for test definition, coding, validation and setup, with suggestions relevant also for FPGA tests and potentially for system-level characterization of miniaturized assemblies. It will be illustrated by the relevant example of a microcontroller solution including lockstep options. Our methodology proposes using a first step with LEPs for irradiation, and this paper compares this approach with current techniques and standards, showing how proton testing is becoming increasingly interesting, especially for ultra-deep submicron processes in proton dominated environments like thin-shielded Low Earth Orbit (LEO) missions or aircraft avionics. The proposed method can be used for testing a wide variety of SoCs, providing a good trade-off between a rigorous and expensive space qualification process and the usage of an untested COTS or non fault tolerant IPs with unpredictable failure modes. LEP tests have a high risk of misinterpretation, and a correct guideline is paramount to exploit their value.
2016 International Conference on Design and Technology of Integrated Systems in Nanoscale Era (DTIS), 2016
This paper presents an intended test setup and methodology for testing micro-controller SoCs agai... more This paper presents an intended test setup and methodology for testing micro-controller SoCs against the effects of ionizing radiations. The method structure is based on a modular test sequence for test definition, coding, validation and setup. It will be illustrated by the relevant example of a microcontroller solution including lockstep options. Our methodology proposes using low-energy protons for irradiation, and this paper compares this approach with current techniques, showing how proton testing is becoming increasingly interesting, especially for ultra-deep submicron processes in proton dominated environments like low-shielded Low Earth Orbit missions or aircraft avionics. Beyond the convenience of a simplified test setup one of the main advantages of the proton irradiation approach is that it can be used for simultaneous Single Event Effects (SEE) and Total Ionizing Dose (TID) characterization, closer to the "test as you fly" approach.
AIP Conference Proceedings, 2002
The reaction 12C(alpha,gamma)16O has a strong influence on both stellar evolution and nucleosynth... more The reaction 12C(alpha,gamma)16O has a strong influence on both stellar evolution and nucleosynthesis after the helium burning stage in massive stars. The E1 amplitude of this astrophysical important reaction was measured in inverse kinematics using a 4He windowless gas target and an intense 12C ion beam in combination with an array of HPGe detectors. The results of this measurement were extrapolated to the relevant energy for helium burning (E0=300 keV) using the R-matrix formalism of nuclear reactions. The error on the extrapolated value was determined via a Monte Carlo procedure. The results of this experiment and of their extrapolation to E0 are presented and compared with previous data. .
AIP Conference Proceedings, 1999
The scientific program of nuclear astrophysics at the INFN underground laboratories of Gran Sasso... more The scientific program of nuclear astrophysics at the INFN underground laboratories of Gran Sasso for the next five years (LUNA phase II or LUNA2) is presented and discussed.
Triple coincidences between complex fragments with Z 2 3, light charged particles and y transitio... more Triple coincidences between complex fragments with Z 2 3, light charged particles and y transitions have been measured for the system 58Ni+58Ni at 500 MeV incident energy. To this end the HILI detector and a 19 pack BaFz cluster made of 19 crystals of TAPS geometry have been used. Effective temperatures have been obtained from the ratios of the bound excited level cross sections to the ground states ones for c'. N and 0 evaporated after complete fusion of jsNi fS8Ni at 500 hleV incident energy. The dependence of the effective temperature on the charged light particle multiplicity has been investigated. DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or proctss disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise dots not necessarily constitute or imply its endorsement, Ttcommendation. or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.
Revista Mexicana de Fisica
ABSTRACT
AIP Conference Proceedings, 1997
Nuclear fusion reactions play a key role in the understanding of energy production, neutrino emis... more Nuclear fusion reactions play a key role in the understanding of energy production, neutrino emission and nucleosynthesis of the elements in stars. The direct measurement of the cross section of these reactions at the relevant energies is usually hampered by cosmic radiation, beam induced background and/or the radioactivity of the nuclei involved. In order to suppress these background contributions one
Journal of Physics G: Nuclear and Particle Physics, 2013
The investigation of the 19 F(p, α 0) reaction at low bombarding energies allows the study of the... more The investigation of the 19 F(p, α 0) reaction at low bombarding energies allows the study of the spectroscopy of the 20 Ne compound nucleus in an energy region where the existence of quartet excitations has been suggested in the literature. Moreover, this reaction plays a major role in the fourth branch of the CNO cycle since it is relevant for the correct description of the hydrogen burning of fluorine in stars. For these reasons, we decided to investigate the 19 F(p, α 0) reaction in the E p 0.6-1 MeV energy range. The analysis of angular distributions and excitation functions allows one to improve the 20 Ne spectroscopy in an excitation energy region where some ambiguities concerning J π assignments exist in the literature. In particular, the present data suggest a J π = 0 + assignment to the E x = 13.642 MeV resonance. For this state, both partial and reduced widths for the α 0 channel have been deduced. The trend of the astrophysical factor has been obtained from the integrated cross section. A comparison of the present results with data reported in the literature is also discussed.
International Journal of Modern Physics A
NUMEN proposes an innovative technique to access the nuclear matrix elements entering the express... more NUMEN proposes an innovative technique to access the nuclear matrix elements entering the expression of the lifetime of the double beta decay by cross-section measurements of heavy-ion induced Double Charge Exchange (DCE) reactions. Despite the fact that the two processes, namely neutrinoless double beta decay and DCE reactions, are triggered by the weak and strong interaction respectively, important analogies are suggested. The basic point is the coincidence of the initial and final state many-body wave functions in the two types of processes and the formal similarity of the transition operators. The main experimental tools for this project are the K800 Superconducting Cyclotron and MAGNEX spectrometer at the INFN-LNS laboratory. However, the tiny values of DCE cross-sections and the resolution requirements demand beam intensities much higher than those manageable with the present facility. The on-going upgrade of the INFN-LNS facilities promoted by the POTLNS a project in this per...
Book of Abstracts
Targeting sonic hedgehog pathway in combination with proton radiation or gamma irradiation decrea... more Targeting sonic hedgehog pathway in combination with proton radiation or gamma irradiation decreases viability of glioma cell lines .
International Journal of Modern Physics: Conference Series, 2020
Experiments of nuclear physics have been carried out at the Bern medical cyclotron, in which a be... more Experiments of nuclear physics have been carried out at the Bern medical cyclotron, in which a beam line dedicated to research activities is available. Our main goal is to upgrade this facility as a well-characterized neutron source for studies of radiation hardness and for tests of new neutron detectors. To achieve this result, preliminary measurements have been carried out among which the measurement of the incident proton energy by means of a method based on Rutherford backscattering spectroscopy. The analysis of the energy spectrum corresponding to protons elastically and inelastically backscattered by the carbon target allowed the precise identification of the excited states of 12C, including the Hoyle state. These results confirmed the Bern medical cyclotron as a reliable facility to perform research activities in the field of fundamental nuclear physics as well as of applied physics.
Optical Fiber Sensors Conference 2020 Special Edition, 2021
Radiochromic film dosimetry is a well-established technique particularly suitable for off-line do... more Radiochromic film dosimetry is a well-established technique particularly suitable for off-line dose measurements. We propose an innovative method for the determination of the dose in real-time with radiochromic films based on optoelectronic instrumentation.
Frontiers in Astronomy and Space Sciences, 2021
The goal of NUMEN project is to access experimentally driven information on Nuclear Matrix Elemen... more The goal of NUMEN project is to access experimentally driven information on Nuclear Matrix Elements (NME) involved in the neutrinoless double beta decay (0νββ) by accurate measurements of the cross sections of heavy-ion induced double charge-exchange reactions. In particular, the (18O,18Ne) and (20Ne,20O) reactions are adopted as tools for β+β+and β−β−decays, respectively. The experiments are performed at INFN–Laboratory Nazionali del Sud (LNS) in Catania using the Superconducting Cyclotron to accelerate the beams and the MAGNEX magnetic spectrometer to detect the reaction products. The measured cross sections are very low, limiting the present exploration to few selected isotopes of interest in the context of typically low-yield experimental runs. In order to make feasible a systematic study of all the candidate nuclei, a major upgrade of the LNS facility is foreseen to increase the experimental yield by more than two orders of magnitude. To this purpose, frontier technologies are ...
Physica Medica, 2019
In this work, we report on a novel approach for measuring the dose absorbed by the EBT3 Gafchromi... more In this work, we report on a novel approach for measuring the dose absorbed by the EBT3 Gafchromic™ films exposed to 1 MeV electron beam and 250 kV X-rays in the range 0.5-100 Gy. Although EBT3 is specifically designed to obtain best performance for applications where the maximum dose is less than 10 Gy, there are certain clinical applications requiring dose ranges well above this value. In order to cover wider dose ranges, further models characterized by a thinner sensitive layer and/or different chemical composition have been released. Another method exploiting the three-channel flatbed scanner to delay the saturation point of EBT3 has been also reported. The technique proposed here, aimed at extending the sensitivity of the EBT3 film to high doses up to 100 Gy while ensuring a low dose uncertainty, is based on a broadband analysis of the absorption spectrum of the film in response to irradiation. By combining a wavelength-based approach with the monitoring of two characteristic peaks of the EBT3 absorption spectrum, we demonstrated the capability of measuring the dose in the range 0.5-100 Gy with an experimental uncertainty below 4% for doses lower than 5.52 Gy and below 2% for higher dose levels. Finally, through a dynamic fitting procedure integrating the two aforesaid approaches, a total uncertainty lower than 4%, including both the experimental and fitting errors, was achieved in the whole range 0.5-100 Gy. These results are promising in view of a potential application of this technique in the field of clinical dosimetry at high dose levels.
Scientific Reports, 2019
Radiochromic film dosimetry has been widely employed in most of the applications of radiation phy... more Radiochromic film dosimetry has been widely employed in most of the applications of radiation physics for over twenty years. This is due to a number of appealing features of radiochromic films, such as reliability, accuracy, ease of use and cost. However, current radiochromic film reading techniques, based on the use of commercial densitometers and scanners, provide values of dose only after the exposure of the films to radiation. In this work, an innovative methodology for the real-time reading of radiochromic films is proposed for some specific applications. The new methodology is based on opto-electronic instrumentation that makes use of an optical fiber probe for the determination of optical changes of the films induced by radiation and allows measurements of dose with high degree of precision and accuracy. Furthermore, it has been demonstrated that the dynamic range of some kinds of films, such as the EBT3 Gafchromic films (intensively used in medical physics), can be extended ...
IEEE Transactions on Nuclear Science, 2018
Commercial-Off-The-Shelf System-on-Chip FPGAs are gaining momentum in space applications and thei... more Commercial-Off-The-Shelf System-on-Chip FPGAs are gaining momentum in space applications and their radiation characterization becomes crucial. This work targets a costeffective test setup and procedures for Total Ionization Dose testing of miniaturized complex devices. We combine Hardware and Software techniques to perform on-chip irradiation via a 90 Sr/ 90 Y electron source and assess in detail the degradation of complex SRAM FPGAs. Our methodology combines multiple sensing mechanisms with correlation analysis to facilitate modeling of effects and tuning of a custom Ring-Oscillator network for future autonomous in-flight use. Focusing on 28nm Zynq7000 devices, our results show Mrad TID tolerance with parameters' degradation in the area of 5%, zero functional errors, and nonuniform spatial response.
Scientific Reports, 2018
In this work, we report on the first demonstration of Lab on Fiber (LOF) dosimeter for ionizing r... more In this work, we report on the first demonstration of Lab on Fiber (LOF) dosimeter for ionizing radiation monitoring at ultra-high doses. The new dosimeter consists in a metallo-dielectric resonator at sub-wavelength scale supporting localized surface plasmon resonances realized on the optical fiber (OF) tip. The resonating structure involves two gold gratings separated by a templated dielectric layer of poly(methyl methacrylate) (PMMA). Two LOF prototypes have been manufactured and exposed at the IRRAD Proton Facility at CERN in Geneva to 23 GeV protons for a total fluence of 0.67 × 1016 protons/cm2, corresponding to an absorbed dose of 1.8 MGy. Experimental data demonstrated the “radiation resistance” feature of the LOF devices and a clear dependence of the reflected spectrum versus the total dose, expressed by a cumulative blue-shift of ~1.4 nm of the resonance combined with a slight increase of 0.16 dBm in the reflected spectrum. The numerical analysis carried out to correlate t...
Topics in Current Chemistry, 2016
Beyond their important economic role in commercial communications, satellites in general are crit... more Beyond their important economic role in commercial communications, satellites in general are critical infrastructure because of the services they provide. In addition to satellites providing information which facilitates a better understanding of the space environment and improved performance of physics experiments, satellite observations are also used to actively monitor weather, geological processes, agricultural development and the evolution of natural and man-made hazards. Defence agencies depend on satellite services for communication in remote locations, as well as for reconnaissance and intelligence. Both commercial and government users rely on communication satellites to provide communication in the event of a disaster that damages ground-based communication systems, provide news, education and entertainment to remote areas and connect global businesses. The space radiation environment is an hazard to most satellite missions and can lead to extremely difficult operating conditions for all of the equipment travelling in space. Here, we first provide an overview of the main components of space radiation environment, followed by a description of the basic mechanism of the interaction of radiation with matter. This is followed by an introduction to the space radiation hardness assurance problem and the main effects of natural radiation to the microelectronics (total ionizing dose, displacement damage and the single-event effect and a description of how different effects occurring in the space can be tested in on-ground experiments by using particle accelerators and radiation sources. We also discuss standards and the recommended procedures to obtain reliable results. This article is part of the Topical Collection ''Applications of Radiation Chemistry''; edited by
2016 IEEE International Symposium on Defect and Fault Tolerance in VLSI and Nanotechnology Systems (DFT), 2016
This paper discusses radiation tests on complex System-on-Chip (SoC) controllers using Low-Energy... more This paper discusses radiation tests on complex System-on-Chip (SoC) controllers using Low-Energy Protons (LEPs). The aim of this novel set of guidelines is to be also applicable to System In Package (SIP) or hybrid components that are now often used to overcome printed circuit board's real estate restrictions in Hi-Rel electronics. Despite the growing success of microcontrollers SoC in HiRel applications, general and standardized methods for Single Event Effects (SEE) testing of complex SoCs have not been widely established. This paper will propose a general methodology, structured in a modular test sequence for test definition, coding, validation and setup, with suggestions relevant also for FPGA tests and potentially for system-level characterization of miniaturized assemblies. It will be illustrated by the relevant example of a microcontroller solution including lockstep options. Our methodology proposes using a first step with LEPs for irradiation, and this paper compares this approach with current techniques and standards, showing how proton testing is becoming increasingly interesting, especially for ultra-deep submicron processes in proton dominated environments like thin-shielded Low Earth Orbit (LEO) missions or aircraft avionics. The proposed method can be used for testing a wide variety of SoCs, providing a good trade-off between a rigorous and expensive space qualification process and the usage of an untested COTS or non fault tolerant IPs with unpredictable failure modes. LEP tests have a high risk of misinterpretation, and a correct guideline is paramount to exploit their value.
2016 International Conference on Design and Technology of Integrated Systems in Nanoscale Era (DTIS), 2016
This paper presents an intended test setup and methodology for testing micro-controller SoCs agai... more This paper presents an intended test setup and methodology for testing micro-controller SoCs against the effects of ionizing radiations. The method structure is based on a modular test sequence for test definition, coding, validation and setup. It will be illustrated by the relevant example of a microcontroller solution including lockstep options. Our methodology proposes using low-energy protons for irradiation, and this paper compares this approach with current techniques, showing how proton testing is becoming increasingly interesting, especially for ultra-deep submicron processes in proton dominated environments like low-shielded Low Earth Orbit missions or aircraft avionics. Beyond the convenience of a simplified test setup one of the main advantages of the proton irradiation approach is that it can be used for simultaneous Single Event Effects (SEE) and Total Ionizing Dose (TID) characterization, closer to the "test as you fly" approach.
AIP Conference Proceedings, 2002
The reaction 12C(alpha,gamma)16O has a strong influence on both stellar evolution and nucleosynth... more The reaction 12C(alpha,gamma)16O has a strong influence on both stellar evolution and nucleosynthesis after the helium burning stage in massive stars. The E1 amplitude of this astrophysical important reaction was measured in inverse kinematics using a 4He windowless gas target and an intense 12C ion beam in combination with an array of HPGe detectors. The results of this measurement were extrapolated to the relevant energy for helium burning (E0=300 keV) using the R-matrix formalism of nuclear reactions. The error on the extrapolated value was determined via a Monte Carlo procedure. The results of this experiment and of their extrapolation to E0 are presented and compared with previous data. .
AIP Conference Proceedings, 1999
The scientific program of nuclear astrophysics at the INFN underground laboratories of Gran Sasso... more The scientific program of nuclear astrophysics at the INFN underground laboratories of Gran Sasso for the next five years (LUNA phase II or LUNA2) is presented and discussed.
Triple coincidences between complex fragments with Z 2 3, light charged particles and y transitio... more Triple coincidences between complex fragments with Z 2 3, light charged particles and y transitions have been measured for the system 58Ni+58Ni at 500 MeV incident energy. To this end the HILI detector and a 19 pack BaFz cluster made of 19 crystals of TAPS geometry have been used. Effective temperatures have been obtained from the ratios of the bound excited level cross sections to the ground states ones for c'. N and 0 evaporated after complete fusion of jsNi fS8Ni at 500 hleV incident energy. The dependence of the effective temperature on the charged light particle multiplicity has been investigated. DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or proctss disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise dots not necessarily constitute or imply its endorsement, Ttcommendation. or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.
Revista Mexicana de Fisica
ABSTRACT
AIP Conference Proceedings, 1997
Nuclear fusion reactions play a key role in the understanding of energy production, neutrino emis... more Nuclear fusion reactions play a key role in the understanding of energy production, neutrino emission and nucleosynthesis of the elements in stars. The direct measurement of the cross section of these reactions at the relevant energies is usually hampered by cosmic radiation, beam induced background and/or the radioactivity of the nuclei involved. In order to suppress these background contributions one
Journal of Physics G: Nuclear and Particle Physics, 2013
The investigation of the 19 F(p, α 0) reaction at low bombarding energies allows the study of the... more The investigation of the 19 F(p, α 0) reaction at low bombarding energies allows the study of the spectroscopy of the 20 Ne compound nucleus in an energy region where the existence of quartet excitations has been suggested in the literature. Moreover, this reaction plays a major role in the fourth branch of the CNO cycle since it is relevant for the correct description of the hydrogen burning of fluorine in stars. For these reasons, we decided to investigate the 19 F(p, α 0) reaction in the E p 0.6-1 MeV energy range. The analysis of angular distributions and excitation functions allows one to improve the 20 Ne spectroscopy in an excitation energy region where some ambiguities concerning J π assignments exist in the literature. In particular, the present data suggest a J π = 0 + assignment to the E x = 13.642 MeV resonance. For this state, both partial and reduced widths for the α 0 channel have been deduced. The trend of the astrophysical factor has been obtained from the integrated cross section. A comparison of the present results with data reported in the literature is also discussed.