The FRS acquisition: single-event mode

Information about the computational environment and the main software packages used for data taking at the FRS in single-evnt mode are here described.

Some basic instructions how to set up a running FRS data acquisition with the FRS and User branch are also given.

Starting up MBS

First, be sure that all the VME crates in the FRS Messühutte are turned on.

Log in as profi user (password is required) in one of the Lynx PC of the FRS Messhütte and create a working directory under /lynx/Lynx/frs/usr/profi/mbsrun/runxxx,

where xxx is the run number assigned to the FRS experiment.

Copy there all files including subdirectory from /lynx/Lynx/frs/usr/profi/frs_single_event/user/.

Check that the subdirectory /vme_user_branch contains all the correct files.

If not you have to set them according to your VME configuration. It means that you could need to edit the f_user.c function, add new ADCs, TDCs, etc., or change threshold values.

To do that it is not difficult but you need to be very careful ! All the files in the subdirectory /vme_frs_branch are correct and normally you do not need to make any change there.

Then log in as profi ( different password is required) into the RIO3 or 4 processor and make the executable; it is called m_read_meb.

Enter into X86-11 machine and perform a reset of all the processor X86-11> reset
The following massage should appear:

The system try to close the connections, if any was. You can check the status CLOSE_WAIT or TIME_WAIT with the command X86-11> net600
You can repeat this command after some time. When you do not see them anymore, invoke the MBS environment.
X86-11> prm

The nodes of the environments to be controlled by the prompter are in this case 3, R4-13, R3-27 and X86-11, as appairs from the file node_list.txt.
All the MBS tasks can be started executing the command file startup.scom.
mbs> @startup
the following messages should appear saying that crate initializations take place:

and you can start your acquisition with the command
mbs> start acq
if trigger #14 is found everything was correct.

You will get X86-11> as a prompt. From there you can see the contents of an event on the screen with the command
X86-11> type ev -v

Check what is going on and if the physics trigger is there by log into X86-11 from another terminal and giving the command
X86-11> rate
In this case the acquisition rate will be continously monitored every second. The monitoring can be exited with Ctrl-C.

If you want to transfer or analyse your data with a client you have to start the remote event server from a new terminal
profi> mrevserv X86-11
and you will get the connection to a port (defaultnumber 6003). This will be indicated also where the mbs prompt is.
To stop the acquisition give the command
mbs> stop acq