Large dynamic range small-angle diffractometer

D22 computing environment

This document describes the configuration of the computing environment of D22 and its use.

See also the D22 documentations

Computer configuration

SGI UNIX station <-- ethernet --> Dec Alpha UNIX <-- ethernet --> VME, Macintosh
d22sgi station d22
Any UNIX station <--- ----> RS232 1 ----> LA30 log printer
Any X terminal <--- ----> RS232 2 ---->
---> RS232 3 ----> GE Fanuc process controller
Power Macintosh <--- ----> RS232 4 ----> other devices
used as terminal
Dell PC <--- ---->
------------- ----------------
data treatment data acquisition

The Dec Alpha workstation d22 monitor (20 inch) near the cabin entrance door is the instrument control terminal. It runs the MAD program. On a separate 17 inch monitor, the spy program msp, the raw data supervision program visu2, and the printer switching program nsw are displayed. In case no xterm is active there, type xtermright on the main monitor.

The workstation may be "sleeping". In this case, the password "d22d22" may need to be typed to re-activate a session.

New windows can be created by clicking on the icon representing a terminal on the application menu bar at the bottom of the monitor screen.

The large workstation screen also allows you to have different other X sessions open and offers desk accessories like a clock, a calendar and a calculator. Applications can be opened using the application menu bar at the bottom of the monitor screen or by typing their commands in a terminal window.

If rebooting is needed, refer to the D22 emergency procedures.

A Silicon Graphics Indy workstation with an R4600 processor and 64 Mb of memory running with 100 MHz serves for data treatment.

Creating a session

If a session is not already active, type d22<CR> and the password d22d22<CR> on the d22sgi keyboard. The system will prompt with a question for your name. Answer with your name in small letters. This will create a subdirectory in the visitor zone /home/vis/d22/your_name in which you can work.

The treatment of SANS data is explained in detail on the ILL web pages, where you can also find information on raw data and treated data formats (one-dimensional and two-dimensional).

There are also PCs to visualize the industrial process controller (GE Fanuc 90-70) and for controlling the Dornier velocity selector. These PCs are not connected to the ethernet.

A Power Macintosh G4 serves for data treatment and presentation, text editing etc. It can also be used as a terminal via the eXodus and Telnet applications.

Recently, a Dell PC running either Windows NT or Linux (Suse) has been added.

Available printers can be seen by choosing Printer Monitor in the Toolchest under System.

These printers can be addressed by the standard UNIX print command lp -ddestination file_name, where destination is the name of one of the known printers. There is also a macrocommand pri file_name that calls a graphical user interface myprinter allowing one to select a default printer. myprinter can also be used at any time to change the default printer.

File transfer is most easily performed using (/usr/public/bin/)xftp on the UNIX station or Fetch on the Power Macintosh.

Web document produced by Roland May, ILL Grenoble (last update: 08-Mar-2001) Thanks to Edith Amalric whose D16 manual served as a basis for this document.