Nuclear Science User Facility: Overview of Neutron Irradiation Activities

Recent studies have shown the presence of voids in several face-centered cubic metals after neutron irradiation at elevated temperatures. These voids were found when the irradiation temperature was above 0.3 Tm where Tm is the absolute melting point, and were ascribed to the agglomeration of lattice vacancies resulting from fast neutron generated displacement cascades. The present paper reports the existence of similar voids in the body-centered cubic metals tungsten and molybdenum.

Download Full-text

Plug-in scripts for EFTEM automation

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100165197 ◽

1996 ◽

Vol 54 ◽

pp. 546-547

Author(s):

N. D. Evans ◽

M. K. Kundmann

Keyword(s):

Electron Microscopy ◽

National Laboratory ◽

Oak Ridge ◽

Multiple User ◽

Transmission Electron ◽

Short Period ◽

User Facility ◽

Instrument Control ◽

And Control ◽

Research Equipment

Post-column energy-filtered transmission electron microscopy (EFTEM) is inherently challenging as it requires the researcher to setup, align, and control both the microscope and the energy-filter. The software behind an EFTEM system is therefore critical to efficient, day-to-day application of this technique. This is particularly the case in a multiple-user environment such as at the Shared Research Equipment (SHaRE) User Facility at Oak Ridge National Laboratory. Here, visiting researchers, who may oe unfamiliar with the details of EFTEM, need to accomplish as much as possible in a relatively short period of time.We describe here our work in extending the base software of a commercially available EFTEM system in order to automate and streamline particular EFTEM tasks. The EFTEM system used is a Philips CM30 fitted with a Gatan Imaging Filter (GIF). The base software supplied with this system consists primarily of two Macintosh programs and a collection of add-ons (plug-ins) which provide instrument control, imaging, and data analysis facilities needed to perform EFTEM.

Download Full-text

A Macintosh Interface for the Cameca Camebax-Micro Electron Microprobe

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010018094x ◽

1990 ◽

Vol 48 (1) ◽

pp. 438-439

Author(s):

Carl E. Henderson

Keyword(s):

Electron Microprobe ◽

Processing Speed ◽

Word Processing ◽

State Of The Art ◽

Computer Control ◽

Third Party ◽

Disk Storage ◽

The Past ◽

User Facility ◽

Instrument Control

Over the past few years it has become apparent in our multi-user facility that the computer system and software supplied in 1985 with our CAMECA CAMEBAX-MICRO electron microprobe analyzer has the greatest potential for improvement and updating of any component of the instrument. While the standard CAMECA software running on a DEC PDP-11/23+ computer under the RSX-11M operating system can perform almost any task required of the instrument, the commands are not always intuitive and can be difficult to remember for the casual user (of which our laboratory has many). Given the widespread and growing use of other microcomputers (such as PC’s and Macintoshes) by users of the microprobe, the PDP has become the “oddball” and has also fallen behind the state-of-the-art in terms of processing speed and disk storage capabilities. Upgrade paths within products available from DEC are considered to be too expensive for the benefits received. After using a Macintosh for other tasks in the laboratory, such as instrument use and billing records, word processing, and graphics display, its unique and “friendly” user interface suggested an easier-to-use system for computer control of the electron microprobe automation. Specifically a Macintosh IIx was chosen for its capacity for third-party add-on cards used in instrument control.

Download Full-text