[en] The dynamical charcteristics of the heat exchanger representing a horizontal apparatus with a flexible integrated pressurizer are studied. The design analysis for three different fasteners is performed. The computer calculation is performed by the method of finite elements. It is shown that the combination of calculation studies with equipment simulation with the use of models allows to establish reliably main dynamical equipment characteristics and to find out the effect of rigidity of certain construction elements, fastening conditions and presence of liquid on frequency values of free structure vibrations

No abstract available

No abstract available

[en] Adiabatic quantum-flux-parametron (AQFP) logic is one of the most promising superconductor logic families as a candidate to achieve future energy-efficient high-performance information processing systems. The static power of AQFP logic is zero because of ac flux bias, and the switching energy is ∼zJ at 5 GHz due to adiabatic switching. In this study, we propose a design method using offset buffers to reduce the dimension of AQFP circuits; in particular, we focus on the reduction in the horizontal dimension (which is parallel to excitation current) because in AQFP circuits the horizontal dimension tends to be greater than the vertical dimension (which is perpendicular to excitation current). Offset buffers are buffers with offset input signals. The use of offset buffers enables us to eliminate constant cells (which generate constant 0 s and 1 s) from some logic gates, so that the horizontal dimension of logic gates such as AND and OR gates can be significantly reduced. We designed AND and OR gates with offset buffers, and demonstrated them with wide operating margins. Then, we designed and demonstrated a 4–16 decoder using the AND gate with an offset buffer. We found that the horizontal dimension and area of a 4–16 decoder can be reduced by 33% and 26%, respectively, via the use of offset buffers. (paper)

[en] ○ Development of high power THz FEL based on compact accelerator - Compact microtron accelerator - Beam optics and radiation shielding system - Helical undulator - Low-loss cylindrical waveguide in THz range ○ Development of high-speed THz-imaging technology - Design of high-speed imaging system with high-power THz wave - Research on the spectroscopic imaging method - Design of remote irradiation system - Advancement of THz imaging technology ○ Development of table-top high-speed THz image inspection system technology - Compact, high-speed, image inspection system - Study on the system compactization and spectroscopic imaging technology with multi-foil THz generation technology.

[en] The Josephson arbitrary waveform synthesizer is a quantum-based voltage source that can generate arbitrary waveforms with quantum accuracy. However, these state-of-the-art performances are drastically decreased by the wiring connecting the source to the device under test. This wiring introduces deviations from the Josephson voltage which scale quadratically with frequency.

This paper describes a load compensation bridge that fully compensates the load of the Josephson arbitrary waveform synthesizer by the input impedance of the device under test and completely suppresses the frequency dependence up to a frequency of 80 kHz with an overall uncertainty of 2.8 V V⁻¹. (paper)

[en] The unit cell structure for a transmitarray with circular polarization is presented. The unit cell operates at 5.8 GHz. The dependence of the phase shift on the unit cell parameters is investigated. The realization of the reconfigurable unit cell providing two out-of-phase states is under consideration. The proposed unit cell can be promising for a design of the transmitarray with electronic beamsteering capability. (paper)

No abstract available

No abstract available

[en] Measurement of in-plane motion with high resolution and large bandwidth enables model-identification and real-time control of motion-stages. This paper presents an optical beam deflection based system for measurement of in-plane motion of both macro- and micro-scale motion stages. A curved reflector is integrated with the motion stage to achieve sensitivity to in-plane translational motion along two axes. Under optimal settings, the measurement system is shown to theoretically achieve sub-angstrom measurement resolution over a bandwidth in excess of 1 kHz and negligible cross-sensitivity to linear motion. Subsequently, the proposed technique is experimentally demonstrated by measuring the in-plane motion of a piezo flexure stage and a scanning probe microcantilever. For the former case, reflective spherical balls of different radii are employed to measure the in-plane motion and the measured sensitivities are shown to agree with theoretical values, on average, to within 8.3%. For the latter case, a prototype polydimethylsiloxane micro-reflector is integrated with the microcantilever. The measured in-plane motion of the microcantilever probe is used to identify nonlinearities and the transient dynamics of the piezo-stage upon which the probe is mounted. These are subsequently compensated by means of feedback control