Computed tomography technique is applied both to pellet diagnosis and laser-plasma X-ray imaging The former is achieved by transmission CT apparatus developped in this laboratory. Inner structure of multi-layered pellet is diagnosed within the precision of 5%. The latter is studied by newly developped emission CT system, in which X-ray imaging plate is firstly introduced. Reconstructed CT image around the laser-target i s c learly obtained. The precision of 18% is inferred by computer simulation.
A X-ray emission computed tomographic technique has been demonstrated to diagnose laser-irradiated spherical targets. The three dimensional X-ray distribution was estimated by using ART method from five pinhole camera images obtained along different sight directions. The relative error was estimated to be 15% from computer simulations. Obtained X-ray distribution were analyzed in detail comparing with the uniformity of laser focused on the target.
A scanning tunneling microscope(STM) is investigated. A prototype STM which has a three dimensional stage is able to select sample area and to approach a sample automatically' Typical images obtained by the STM are show Surface topograph of cleaved MoS_2 (0001) shows neat arrangement of sulfur atoms with 3.16A Iattion constant. Some defects due to vacancies and a dislocation are also distinguished. Three dimensional topograhs of gratings for soft X-rays and an optical disc observed in air have the advantage of TEM and SEM.
We report on the construction and testing of a supra-high speed xray framing camera based on a gated microchannel plate. An infinite ground plane microstrip transmission-line configration is used. We used an InP optoelectric switch built into the microstrip transmission-line to generate the fast gating pulse. We have measured time and space resolution of the framing camera to. be better than 180psec and 15LP/mm. And coupling the camera with wolter type xray microscope, the xray images of a laser heated Au plasma were observed with 250psec intereframe time.
A neutron streak camera has been proposed to study the temporal history of laser fusion burn. We have designed a streak tube and tested it in electrostatic mode with a neutron source (OKTAVIAN) and an electron linac. In this paper, we report some estimates of tube design and experimental results for static performance: e.g, sensitivity, signal to noise ratio, electron focusing characteristics, deflection sensitivity and estimated temporal resolution.
A projection moire topographic measurement using a laser scanner and a CCD camera was studied. The laser scanner made a high contrast stripe image and in the CCD camera, sensing elements lined as striPes, could act as a reference grid. It was shovn that this system could be applied to moire topographic Deasureuents. Furthermore, dependences of moire fringes on the setting position of the optical system are discussed In detall.
A solid state image sensor with an SOI stracture has been developed. Read - out transistors of this sensor are fabricated on laser recrystallized silicon. A reproduced image of the 50(H) x 60(V) pixel SOI image sensor was successfully obtained. Complete isolation of the read - out transistor from the substrate resulted in a remarkable. reduction of the photoleakage current to value l/8000 times that in the bulk transistor, implying a corresponding reduction of smear noise.
高集積、高速、多機能などの特徴を持つ三次元回路素子の二次元V L S Iに対する優位性は信号の並列処理機能を持つところにあり、この並列信号処理により多量のデータの高速処理が可能と考えられる。我々は処理すべきデータ量の多い画像処理に対して、三次元回路素子を適用して、並列信号処理による画像信号処理の高速化の可能性を検討した。大面積のSOI(絶縁体上のシリコン)形成技術などの積層構造形成技術の開発により、イメージセンサ、A/Dコンバータ、算術論理演算回路の能動層3層からなる三次元回路素子による画像信 号処理機能モデルを試作し、画像信号処理の基本動作を確認した。