last updated 13-Feb-1996
xhost + xterm & netscape &The first command allows other computers, e.g. the ESA computers, to put a display on this terminal. The second command opens up a new X-terminal, and the thrid command launches a Web browser for looking up these pages.
From the new X-terminal window,
telnet to node
esaw03 and log in using the account
beamtest. This is a group account, whose password changes
very often. You can find out the
password from any E155 person on shift.
Send display back to this X-terminal with the command
setenv DISPLAY ncd-e155:0.0,
Change directory to
Run PAW, and select the default workstation type
with a carriage return. A new window should appear. This is where all your
plots will go. When you see the
PAW > prompt, type
shm to connect to the shared memory section containing all
h/plot ID, where
IDis the histogram number. A complete list of IDs with their corresponding titles is obtained initeractively with the
h/listcommand. The list is rather long, and it may be difficult to locate what you want. If you know the approximate ID number, the command
hl ID1 ID2will give you a list in the range
[ID1,ID2]A subset containing beam related histograms has been extracted and explanation added.
nt/print 9001. In this example, there are 53 variables, each identified by a name, eg
status, and its minimum and maximum values in those 3000 spills. Beam variables are at the beginning, followed by data from the 2.75-degree, 5.5-degree and 10.5-degree spectrometers in that order. Depending on the configuration of the analysis program, there may be no variables corresponding to aone or more particular spectrometer. A detailed explanation of each variable can be found elsewhere.
Here are some basic plotting commands.
makes a histogram of the one variable
caltor2, where the
histogram range is automatically chosen to include all data points.
Scatterplots (or correlation plots in SLC-speak) are made by
nt/plot 9001.calgdspl%index where the first (seoond)
variable goes with the vertical (horizontal) axis.
Both plot commands take additional optional arguments. For example, the
first optional argument is a cut expression, and specifying L as the
5-th argument joins data points with a line. Specifying ! for
intervening optional arguments lets them retain their default values, e.g.
nt/plot 9001.angle_y%index status=0 ! ! ! L gives the
followinig picture, indicating some anomalous behaviour near index = 5100.
These unusual excursions do not show up so well without the
If there are specific plots or macro commands that would be useful to MCC operations, please contact Charlie Young to get them implmeneted.
There are manuals available for those interested in the details of Paw. Cern has also provided a very useful Paw Web site with answer to many common questions. E155 experimenters can probably provide some assistance as well.