Data Acquisition Manual: How to run Neutron Time of Flight Measurements at nELBE (Up to July 2011)

- Inelastic Scattering Experiment -

To run neutron time of flight measurement you first have to do some preparations:

1.	switch on the electronics
2.	login to RIO7:	telnet rio7 user name: ntofdaq password: ***********
	remove interrupt request settings	vmeconfig -c
	go to working directory	cd mbsrun/nng/
	start prompter	prm
	intitialize MBS	@start
3.	login to urania (in another terminal window)	ssh -X ntofdaq@urania password: ***********
	go to working directory	cd mbsrun/nng
	open setup_vme_0.ini and setup_vme_1.ini for text editing (if you want to do some special settings⁽²⁾)	xemacs setup_vme_0.ini & xemacs setup_vme_1.ini &
	open mbslog.l, mbsprint_vme_0.l and mbsprint_vme_1.l for monitoring (each in its own terminal window)	tail -f mbslog.l tail -f mbsprint_vme_0.l tail -f mbsprint_vme_1.l
4.	run the automatic setup of the V874B TAPS Modules	(see here)⁽³⁾
5.	login to fwk24 (HV control PC) turn on the detectors you want to use (cf. cabeling scheme⁽⁴⁾)	rdesktop -g 1240x900 -a 16 -k de fwk24 start isegCANHVControl via desktop shortcut
6.	login to zirkonia go to directory for list mode data files start RFIO dispatcher	ssh -X ntofdaq@zirkonia cd /hdd2/ntofdaq/lmd/ rawDispRFIO
7.	login to rio6 go to working directory start OPC readout	telnet rio6 cd mbsrun/nng ./opc2shm

Now the measurement can be started. This has to be done in the MBS prompter (prm):

1.	open list mode file	open file size=900 -auto -rfiodisk if it is the first file enter: open file fwk28:filename_.lmd first=1 size=900 -auto -rfiodisk
2.	start acquisition	rio3::sta acq
3.	wait	...
4.	stop acquisition	rio3::stop acq
5.	close list mode file	close file
6.	note down the values of the live and dead time given at the end of mbsprint_vme_0.l

Step 1 and 2 can also be executed with the command @startrun

Step 4 and 5 can also be executed with the command @stoprun

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