TUTORIAL ON TEXTURE ANALYSIS CODE “popLA” (1/2 day)
Dr. Carl Necker, ctn@lanl.gov
MST Division
Los Alamos National Laboratory
Los Alamos NM 87545 USA
and
Prof. Tony Rollett, rollett@andrew.cmu.edu
Materials Science & Engineering
Carnegie Mellon University
Pittsburgh PA 15213-3890 USA
and
Prof. Raúl Bolmaro, bolmaro@ifir.edu.ar
University of Rosario
Rosario, Argentina
PopLA, preferred orientation package-Los Alamos, has been a mainstay for many experimentalist analyzing texture. Historically, the series of DOS based programs was designed to provide flexibility in texture data analysis on 1980s vintage computers. Applications of texture data and computer systems have evolved significantly with little change in popLA software.
This short course will provide a tutorial on how popLA has been adapted to be more user friendly by running in windows environments. The focus of the program's capabilities has been adjusted to fulfill current user requirements (discretization, plotting, correlation functions). Supplemental information will be provided so newer users can better understand what happens 'under the hood' in popLA. Course includes hands-on instruction and free software.
Outline
1. Introduction (10 minutes)
1.1. What is popLA?
1.2. What is happening with popLA?
1.3. Workshop outline
2. The classic version (30 minutes)
2.1. Short review of history
2.2. Example of typical data processing, with emphasis on the importance of the defocussing correction
2.3. Strengths and weaknesses
3. The new version (60 minutes)
3.1. Drivers for development
3.2. What has changed?
3.3. Where we hope to take popLA in the future
Short break (10 minutes)
4. A look under the hood (60 minutes)
4.1. RAW data file eccentricities
4.2. DIGEST (RAW to EPF)
4.3. ROTATE (EPF to RPF)
4.4. HARMONICS (RPF to FUL)
4.5. WIMV (HFP to WPF/SOD)
4.6. Data manipulations (tilt, symmetrize, expand, subtract, cod)
5. Supplementary tools not found in popLA (40 minutes)
5.1. Discretization
5.2. Volume fraction analysis
5.3. Traditional OD plots (Cartesian axes)
6. Solicitation for input (20 minutes)
6.1. Programs written to reformat raw data to popLA format (e.g. from FEI)
6.2. User needs to guide development of popLA
6.3. References - publications, website
The audience is assumed to be a mix of fairly new users and some experienced users.
For attendees not already having popLA installed on their laptop, they will need to request a copy ahead of time and perform the download operations before the workshop
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