作者机构：
[REN, DM; LIU, W; HU, BY] HUAZHONG NORMAL UNIV,DEPT PHYS,WUHAN 430070,PEOPLES R CHINA.;[REN, DM] UNIV SCI & TECHNOL CHINA,CTR FUNDAMENTAL PHYS,HEFEI 230026,PEOPLES R CHINA.
通讯机构：
[REN, DM] U;UNIV SCI & TECHNOL CHINA,CTR FUNDAMENTAL PHYS,HEFEI 230026,PEOPLES R CHINA.
会议名称：
37TH INTERNATIONAL SYMP ON FIELD EMISSION
会议时间：
JUL 29-AUG 03, 1990
会议地点：
ALBUQUERQUE, NM
会议主办单位：
HUAZHONG NORMAL UNIV,DEPT PHYS,WUHAN 430070,PEOPLES R CHINA.
摘要：
A manual procedure to determine the body-centered cubic structure of tungsten directly by its FIM micrographs and by field evaporation is reported here. It was performed to obtain a general method for determining the three-dimensional microstructure of FIM specimens, and as a first step of characterizing the method as well. It mainly consists of the following steps: The selection of the region of exploration; the localization of imaged atoms; the determination of the diameter of the tungsten atom model; simulation of the field ion micrographs; acquisition of the three-dimensional microstructure of the examined area.
作者机构：
[REN, DM; LIU, W; HU, BY] UNIV SCI & TECHNOL CHINA,CTR FUNDAMENTAL PHYS,HEFEI 230026,PEOPLES R CHINA.;[LIU, W] HUAZHONG NORMAL UNIV,DEPT PHYS,WUHAN 430070,PEOPLES R CHINA.
通讯机构：
[LIU, W] H;HUAZHONG NORMAL UNIV,DEPT PHYS,WUHAN 430070,PEOPLES R CHINA.
会议名称：
37TH INTERNATIONAL SYMP ON FIELD EMISSION
会议时间：
JUL 29-AUG 03, 1990
会议地点：
ALBUQUERQUE, NM
会议主办单位：
UNIV SCI & TECHNOL CHINA,CTR FUNDAMENTAL PHYS,HEFEI 230026,PEOPLES R CHINA.
摘要：
We report on an attempt to determine the microstructure of a FIM specimen directly by its field ion micrograph combined with field evaporation. In this paper the general idea and presumptive procedures of the method are described. In a following paper the determination of the body-centered cubic structure of tungsten obtained by a manual method is reported. The same work performed by a digital video image acquiring/analyzing station is reported in the third part, which is the first stage in realizing our objective.
作者机构：
[QIN, JH; REN, DM; LIU, W; HU, BY; ZHOU, GE] HUAZHONG NORMAL UNIV,DEPT PHYS,WUHAN 430070,PEOPLES R CHINA.;[REN, DM] UNIV SCI & TECHNOL CHINA,CTR FUNDAMENTAL PHYS,HEFEI 230026,PEOPLES R CHINA.
通讯机构：
[REN, DM] U;UNIV SCI & TECHNOL CHINA,CTR FUNDAMENTAL PHYS,HEFEI 230026,PEOPLES R CHINA.
会议名称：
37TH INTERNATIONAL SYMP ON FIELD EMISSION
会议时间：
JUL 29-AUG 03, 1990
会议地点：
ALBUQUERQUE, NM
会议主办单位：
HUAZHONG NORMAL UNIV,DEPT PHYS,WUHAN 430070,PEOPLES R CHINA.
摘要：
By using FIM, high-transition-temperature superconducting Bi<inf>2</inf>(Sr, Ca)<inf>3</inf>Cu<inf>2</inf>O<inf>y</inf> has been examined with H<inf>2</inf> and Ar imaging gases. Two kinds of FIM images, lines and spots, have been observed and analyzed. Both patterns convincingly show the lamellate structure of the specimens. The periodicity of the FIM image patterns is consistent with the proposed models, and some new patterns are observed and discussed.
