Online Monitoring

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Online Monitoring

Scalers: xscaler

"xscaler" is a graphical display of the scalers from the Mott DAQ.

Login to opsmdaq0 as the "idaq" user (ssh idaq@opsmdaq0). To run xscaler you must be in the correct directory. Go to /opt/idaq/xscaler and type ./xscaler there and do not forget the dot (.) and slash (/)

Xscaler screen1.jpg


Xscaler screen2.jpg


Xscaler screen3.jpg


Dead Time: datamon

Datamon screen.jpg

There is a display to monitor the DAQ dead time. To run it use the idaq user on opsmdaq0. Type: datamon


Scaler Data written to EPICS

The scaler data which appears in xscaler (see above for xscaler) is also written to EPICS. The data are rates in Hz.

The EPICS channels are of the form "Inj_ScalerN_ChM" where N = 1,2,3 and M = 1,2,3,4,...32. See xscaler for channels assignments. Also listed here:

To retrieve data from EPICS you can, for example, do this:

caget Inj_Scaler1_Ch24

Inj_Scaler1_Ch24 484195

The number here means 484195 Hz.


Online Histogram Display

Log on opsmdaq0 using idaq user and from the idaq home directory and type: peppoOnline.

Two windows open, the smaller one have buttons to control the plot to see, the biggest one shows the plot to monitor.