Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"Radiation hardness"”.
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X-ray CCDs for space applications : calibration, radiation hardness, and use for measuring the spectrum of the cosmic X-ray background
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.
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Development of InAlN HEMTs for space application
… was undertaken using thermal stability, radiation hardness and off-state breakdown measurements. Both InAlN and AlGaN HEMTs showed excellent stability under space-like conditions, with electrical operation maintained after exposure to 9.2 Mrad of gamma radiation at a dose rate of 6.6 …
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Innovative silicon pixel sensors for a 4D VErtex LOcator detector for the LHCb high luminosity upgrade
… high luminosity condition. Moreover the harsher radiation environment will also provide a higher radiation damage to the detectors, much higher than the current VELO detector can withstand. The most promising solution to recover the tracking and vertices performances in the high luminosity …
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Development of a new silicon pixel detector with 10 ps time resolution for high luminosity future experiments
… resolution of the order of 10–20 μm and a radiation hardness up to 6·10^16 1 MeV n_eq/cm^2. In this thesis the characterizations performed both in the laboratory with a 90Sr source and in several test beam campaigns are illustrated. The main measurements done are the time resolution and the …
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An electro-optical simulation methodology for the analysis of single-event radiation effects in photonic devices
… systems increasing in recent years, the study of radiation effects in PICs is still limited, especially the transient radiation effects known as single-event effects (SEEs). A roadblock in advancing the understanding of SEEs in PICs is the inability to co-simulate radiation effects in both the …
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Characterisation of CMOS APS Technologies for Space Applications
… advantages over CCDs, such as improved radiation hardness. In this work, the effect of radiation damage on a ‘baseline’ commercial APS, e2v technologies’ Jade APS, is characterised in response to gamma, proton and heavy ion irradiation. Specific performance problems encountered during …
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Experiences with a pre-series of micro strip gas counters with gas electron multipliers for high rate applications
… forward detector modules to determine their radiation hardness and their readiness for mass production. Five of the modules were built at Aachen, thirteen more at the 'Institut für Experimentelle Kernphysik' in Karlsruhe. For the pre-series, two different types of GEM foils were used: 17 …
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Development of Small-Pitch, Thin 3D Sensors for Pixel Detector Upgrades at HL-LHC
3D Si radiation sensors came along with extreme radiation hard properties, primarily owing to the geometrical advantages over planar sensors where electrodes are formed penetrating through the active substrate volume. Among them: reduction of the inter-electrode distance, lower depletion voltage …
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Nano Vacuum Channel Devices for Electronics and Ultrafast Nanophotonics
… devices due to their low power requirements, radiation hardness, integrability, and ultrafast switching times. Planar NVC devices are ideal candidates for electronics that need to operate in harsh environments such as space. Moreover, recent work, some of which is discussed in this thesis, has …
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Development of enhanced double-sided 3D radiation sensors for pixel detector upgrades at HL-LHC
… Large Hadron Collider (LHC) will call for new radiation hard technologies to be applied in the next generations of tracking devices that will be required to withstand extremely high radiation doses. In this sense, one of the most promising approaches to silicon detectors, is the so called 3D …
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4H silicon carbide particle detectors: study of the defects induced by high energy neutron irradiation
… and improved base materials have pushed the radiation hardness of the current silicon detector technology to impressive performance. It should allow operation of the tracking systems of the Large Hadron Collider (LHC) experiments at nominal luminosity (1034 cm-2s-1) for about 10 years. The …
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DEVELOPMENT OF HIGH-EFFICIENCY POWER DISTRIBUTION ARCHITECTURES BASED ON GAN DEVICES FOR THE LIQUID ARGON CALORIMETER ATLAS EXPERIMENT AT THE LHC
… losses, better thermal management, and better radiation hardness. All these are precious features in the radiation-ensured environment of particle physics experiments. The main task of the thesis is addresses the complete redesign of the Power Distribution Board (PDB2) of the LAr Trigger Board. …
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Surface transfer doping of diamond for power electronics
… prospect since its thermal conductivity and radiation hardness well surpass other wide-bandgap semiconductors. However, practical transistors require the ability to engineer the charge density through substitutional doping which has proven to be difficult considering the strong covalent bonds …
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Magnetoresistive Random Access Memory (MRAM) technology : current advancement and future development
… for memory device: non-volatile (including radiation hardness and materials stability), dense, fast, low power consumption, low cost, IC technology compatible and read/write (R/W) endurance. Magnetoresistive RAM (MRAM) offers such possibility. MRAM has just entered in 2002 with 128kbit …
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Development of detectors for the monitoring of mixed radiation fields
Scintillators and solid-state radiation detectors play a crucial role in high-energy physics, medical imaging, and clinical dosimetry, where requirements such as radiation hardness, geometric flexibility, and detection efficiency are increasingly demanding. This work presents two complementary …
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An investigation of high-k materials in metal-insulator-metal capacitor structures
… silicate capacitors were irradiated with total radiation dosages of 16 krad(Si) and 78 krad(Si). The electrical properties of both samples were characterised and their reliability characteristics were determined. The 16 krad(Si) sample was determined to have excellent radiation hardness and the …
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R&D of a High-Performance DIRC Detector For a Future Electron-Ion Collider
… bar of the DIRC generates optical Cherenkov radiation. A large fraction of this light propagates by total internal reflection to the end of the bar, where the photon trajectories expand in a large volume before reaching a highly segmented photo-detector array. The spatial and temporal …
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EFFECTS OF STRUCTURAL MODIFICATION ON RELIABILITY OF NANOSCALE NITRIDE HEMTs
… low noise, higher efficiency, and temperature/radiation hardness than conventional AlGaAs and Si based technologies. However, as evidenced by recent stress tests, reliability of these devices (characterized by a gradual decrease in the output current/power leading to failure of the device in …
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Development and characterisation of Monolithic Active Pixel Sensor prototypes for the upgrade of the ALICE Inner Tracking System
… will fulfil the material budget, readout and radiation hardness requirements for the upgrade. Intensive R&D has been carried out in the last four years on MAPS in the framework of the ALICE ITS upgrade. Various small scale sensors have been designed in the TowerJazz 0.18 um imaging sensor …
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Magnetic tunnel junction devices and circuits for in-memory, neuromorphic and radiation hard computing
… of magnetic tunnel junctions is their intrinsic hardness to radiation, which makes them an attractive candidate to be used in high radiation environments. We investigate the radiation hardness of perpendicular magnetic anisotropy spin-orbit torque magnetic tunnel junctions to different types of …
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