GISAXS @ D-line: Data

Q: Where are my data ?

Each D-line user gets a user directory assigned on /home/specuser/USER, where USER corresponds to the name of the PI of the experiment. USER has the following default subdirectories:
The data directory contains the SPEC output files. These are all line-up and reflectivity scans, all appended to one file FILENAME, the name of which is declared in the newfile command. This file contains other important information, such as all motor positions at the beginning of each scan or CCD exposure (which corresponds to a tseries scan in SPEC) and the count rates of all monitor detectors along the beamline. The contents, i.e. the important header lines, of such a log file can be listed using the D1 scan command. At the LINUX prompt, type:

scan FILENAME

which generates a list of information on the screen, or

scan FILENAME > FILENAME.LOG

which writes the file information to a file FILENAME.LOG which can complement your logbook notes. scan is a awk script that will run on UNIX and LINUX computers.

The corr and dark directories contain all your images, the automatically corrected ones in corr, the dark images in dark.

The /home/specuser/images directory contains all raw data files that the CCD collects. At the end of a user experiment ~/images should be copied to USER/raw, if users would like to keep the raw images:
Otherwise, raw images will be removed to make space for the next user group.

Q: How do I take my data home ?

After several years of struggling with this problem, the following procedure has proven to be solid:

Q: How do I set up a lap top at D-line ?

The easiest and most reliable way is to connect the lap top to an ethernet connector (there are 2 user ports at the desk top and 1 at the prep table) and choose "find address automatically". No special password is required. Please do not hook up lap tops to the switch connecting the beaamline computer and the CCD computer.

The Wilson Lab wireless network requires a password. Please contact the CHESS Computing Group for assistance. There may be interference with the metal hutch walls, so the beamline control area is not ideal for wireless networks.


for internal use: beamline computer hard disk back-up

The present 120GB hard disk at D-line is relatively limited in its capacity for high-throuput GISAXS.
Hence when the user partition of the disk reaches 95%, I have to move files to the back-up server.
In the following a set of the relevant commands.