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A Large-area charged particle detector for high energy physics experiments has been developed. This detector includes inorganic scintillation crystals and wavelength-shifting fibers. This enables us to detect charged particles with higher position resolution and lower cost than conventional scintillation detectors and gas chambers. It has an effective area of 1 m × 1 m.
In this presentation, we will demonstrate successful operation of nitride devices prepared on various low cost substrates by the use of a newly developed low temperature epitaxial growth technique named pulsed sputtering deposition (PSD). We have found that performances of GaN devices such as LEDs or HEMTs fabricated with PSD are as good as those fabricated with conventional MOCVD. We have also found...
We have been developing a submillimeter resolution and low-cost DOI-PET detector using wavelength shifting fibers (WLSF), scintillating crystal plates and MPPCs (Hamamatsu Photonics). Conventional design of DOI-PET detectors had approximately mm3 of resolution by using some scintillating blocks with a volume of 1 mm3, which detects gamma-ray. They are expensive due to difficulties in processing scintillating...
We have developed a new PID detector consists of clear fibers. PID efficiency was measured with 470 MeV e + beam. As a result, this detector with thickness of 5 cm has the PID efficiency of 95 %.
We are developing the scintillation fiber trackers. This detector is consist of 0.5mm φ scintillation fibers and PPDs. This detector has the doughnut shape with outer diameter of 50cm and inner diameter of 10cm and thickness of 2mm. The position resolution is 70μm There are no ineffective area. And the cost is several million yen.
The stress evaluation becomes important for the prior prevention of stress-related illnesses. One of the methods is to analyze the fluctuations of heartbeat called by heart rate variability (HRV), since the heartbeat interval is constantly fluctuating by reflecting autonomous nerve activity. The HRV has been obtained from peak intervals in an electrocardiogram (ECG). However, the use of the ECG is...
Plasma spraying system with high precise, has been expected for smart thermal processing. Plasma Spray Gas tunnel type plasma spraying technique has come under attention with regard to thermal barrier coatings, corrosion and wear resistance coatings and biomaterial coatings because of its superior advantages such as high energy density plasma compared to other conventional plasma jets under various...
Nickel aluminate (NiAl2O4) spinel was formed using transferred arc plasma (TAP) melting in a single step processing. For the same, commercially available NiO and α-Al2O3 powders were mixed in 1∶1 molar weight ratio in a ball mill and then melted in a specially designed transferred arc plasma torch at different operating conditions. Argon gas was used to produce plasma at atmospheric pressure. XRD,...
For shaping a beam of millimeter-wave reflectarrays arbitrarily, this paper proposes a directivity synthesis based on the algorithm of the phase-retrieval method. The unknown phase distribution is numerically determined from an illumination distribution on the aperture and a desired beam pattern by iterative approach. As a design example, we present an elliptical-beam microstrip reflectarray with...
The material thermal processing using the nano-technology is now advanced towards more precise and controllable smart stage. Regarding plasma processing, plasma spraying system with high precise, has been expected for smart thermal processing. A gas tunnel type plasma spraying system exhibits high energy density and also high efficiency. One practical application of plasma processing is plasma spraying...
Microwave reflectometric measurement is applied to diagnose human vital signal. The reflectometer signal is processed by a quadrature phase detector in order to obtain both phase and amplitude components of the signal. The phase component is analyzed by using fast-Fourier transform and wavelet transform to evaluate the frequency spectrum of the heartbeat and respiration. In this report, we focus on...
A patent map, a visual representation of related patent information, is an effective strategic tool for analysis of patent application trends. In particular, an effect-technology type patent map is commonly used because patent examinations are based on technology and effect terms of the inventions. However, the patent map creation is a costly task, because most of patent maps are manually created...
A flat type image sensor consisting of a field emitter array (FEA) and a high-gain avalanche rushing amorphous photoconductor (HARP) target is developed as the low light imaging compact camera. In this paper, the structure and fundamental characteristics of a prototype 2/3-inch HEED-HARP image sensor are described.
We propose a widely-variable optical attenuator for large-core multimode fibers (MMFs), using a free-space optics composed of lenses, a right-angle prism, a linearly graded density filter, and an electrostatically driven MEMS micromirror. The VOA design has an advantage in fast response, due to the small MEMS mirror located at the focal point of the focus lens.
Preparation of piezoelectric AlN thin films on diamond substrates, and their application to SHF SAW devices are discussed. It is confirmed that DC-TFTS method enable to prepare highly c-axis oriented AlN films on polycrystalline diamond substrates. The AlN surface was smooth enough to fabricate fine electrodes with the width of the order of sub-microns. Transversal filters working around 5 GHz were...
We have developed a high-precision method that selects an appropriate model of a video image in order to track an unknown face in front of a large display. Currently, Active Appearance Models (AAMs) are used to track non-rigid objects, such as a faces, because the models efficiently learn the correlation between shape and texture. The problem with an AAM is that when it tracks an unknown face, excessive...
This paper proposes a method for estimating the movement of a user using an acceleration sensor called UME (user movement estimator). By considering time-axis changes in the power spectrum, the method is able to avoid performance loss due to factors such as sudden vibration or times when the power spectrum resembles different types of movement. Testing results show that the method has significantly...
This paper describes the design and construction of a 320-V, 12-F EDLC energy storage bank connected to a bidirectional isolated DC-DC converter. A trade-off between two types of EDLC bank configurations is considered with focus on voltage balancing circuits. This paper also proposes a center-tapped-transformer voltage balancing circuit for the EDLC bank, and includes its experimental verifications...
The aim of this research is to evaluate the driving performance of a cylindrical micro ultrasonic motor which has a casing diameter of 1.8 mm. The micro ultrasonic motor is driven by a cylindrical piezoelectric vibrator, which has a diameter of 0.8 mm. We evaluated the driving performance of the cylindrical piezoelectric vibrator when two different types of rotors were used and two different vibration...
The traffic flow dynamics is described by a nonlinear discrete dynamic system at signalized intersections based on the volume balance. The mean link travel time are analyzed according to the classification of the traffic flow, offset control and moving direction at downstream signalized intersections in urban road networks. The mean link travel time are measured by the average rate of speed of the...
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