Collecting Data at LS-CAT
Preliminaries
Your ability to collect data relies on an accurate ESAF. In
addition to entering accurate information about the samples and
chemicals being brought to LS-CAT, you must be sure the email address
and badge number are correct for everyone listed. Directories and
account names are automatically generated based on the email address
and badge number for those listed on the ESAF. The home directories
and accounts are not generated if the email address and/or badge number
are incorrect. In particular, if the Principle Investigator's
email address is not legal then it will not be possible to collect
data at LS-CAT. Likewise, it will not be possible to use any
remote LS-CAT services without an accurate badge number and email
address.
Pins, Caps, and Vials
We support 18mm pins (22mm overall length) as described here.
Starting at the Beamline
Currently LS-CAT users need to use 2 computers to collect data. We
call one the MD2 computer and the other the Mar computer.
- The MD2 computer
- If needed, log in with the user name "lscat". The staff will tell you the password.
- Start up the MD2 program by double clicking the "StartMe" icon.
- There are no user accounts on this computer and your data is not accessible here.
- The Mar computer
- If someone is already logged in, log them out first
(alt-control-backspace can be used if needed)
- Log in: your account name is the letter "e" followed by your
APS ESAF experiment number. The staff will tell you your
password.
- Use the system preferences to turn off the screen saver. When
the Mar computer goes into screen saver mode it will add an
additional 5 seconds per frame to collect data.
- In the first workspace open a terminal session (right-click
somewhere on the desktop for a menu that includes opening a
terminal session)
- Type "marccd". The marccd program should start up.
The program will take two exposures to use as the background
within about 10 seconds of starting.
- Check that the detector cooler is on, contact the staff if
it's not.
- In the second workspace open a new terminal session and
type 21D on the 21-ID-D station, 21F on the
21-ID-D station, and 21G on the 21-ID-G station. Please
use the correct station letter as you'll likely ruin someone elses
experiment otherwise.
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Screen shots of the MD2 phases: Sample Transfer, Centering, Data
Collection, and Beam Location. Click on a screen shot to see a brief
explanation and a link to a full scale version of the screen
shot
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Sample Transfer Phase
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Centering Phase
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Data Colleciton Phase
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Beam Location Phase
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Here are some useful files:
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