Quantitative Measurement of Electron Diffraction Intensity with the Imaging Plate (original) (raw)

Reflection High-Energy Electron Diffraction (RHEED)

Zairyō to kankyō, 1994

Principle and characteristic of reflection high-energy electron diffraction (RHEED) are described paying to the relations between RHEED patterns and surface morphologies. Some examples indicating the relations are shown. Micro-probe RHEED is also described, in which focused electron beams are used for obtaining crystalline information from surface micro-areas. An in situ observation result of Si thin film growth is shown as an example.

An optical metrology of smectite dissolution using a phase-shift interference microscope

2005

Mineral dissolutions in aqueous solutions were optically measured using a phase-shift interference microscope which was newly designed for ultra-slow dissolution phenomena (rate = ~ 1 μm/year). Dissolution experiments performed on single particulate smectite consistently showed various rates dependent on pH conditions (pH = 8-14), but unusually faster rates than previous results that determined chemically. It can successfully be recognized that smectite dissolution involves inhibition process occurred by dissolved silica molecules. Probably our observed dissolution could be the maximum and can be distinguished from dissolution at suspended smectite such occurred in both the flow-through experiments and the natural barrier materials for radioactive waste repository.

Material Dependence of Energy Spectra of Fast Electrons Generated by Use of High Contrast Laser

The Review of Laser Engineering, 2013

We studied the material dependence of electron acceleration with ultra-intense laser light at an intensity of 5 10 19 W/cm 2. Recent particle simulations have shown that the average energy of fast electrons stays lower than the prediction of ponderomotive scaling if intense laser light interacts directly with the target material. To control the fast electron energy spectra, we performed an experiment at the J-KAREN laser facility. The observed electron spectra show that the slope temperature for aluminum is 1.4 times higher than gold. The enhancement is strongly related to the average ioniation degree in the thin preplasma region in the PIC simulation result. The maximum proton energy reaches 10 MeV, and it shows the same values for Al, Cu and Au. The PIC simulations exhibit the values of the sheath Þ eld at the target rear for Al, Cu, and Au, all of which are the same as the experiment.

Deformation Measurement by Phase-shifting Digital Holographic Interferometry

Proceedings of the 1992 Annual Meeting of JSME/MMD, 2004

Measurement of the ou 重 一 〇f− plane displacemcnt of a can 丗 ever is perfomled by phase −shifting digital holographic 血 terferomety． Phase − shi 食ing method is used for the phase analysis Qf the hologram recorded on a CCD sensoL ［ ［ he complex amplitude of the reconstructed objecl is obtained from the complex amplitude of the CCD planc using the Fresnel di丗 action algorithm ， The difEerence of the phase distribut 三 〇 ns before and after deformation， i ・ e ・ out ・ of 」 plane displacement is calculated ． 1n order to decrease the e 価ect of speckle pattern ， the hologram is divided 血 to 16 parts ． The phase is ob 吐 aincd from the phase with the maximum amphtude among the complex amplitudes obtained fビom an the separated hoiograms ． As the result ， by eliminating the effect of speckle ， a smooth phase difference distribution is obtained ，