Data Acquisition Manual: How to run Neutron Time of Flight Measurements at nELBE (up to June 2010)
(latest version)- Transmission Experiment -
To run neutron time of flight measurement you first have to do some preparations:
1. | switch on the electronics | |
The following has to be done because the electonics setup is the same as for the n,n'g experiments, where some additional VME modules are used. These modules have to be initialised first. | ||
login to RIO7: | telnet rio7 user name: ntofdaq password: *********** |
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remove interrupt request settings | vmeconfig -c | |
go to working directory | cd mbsrun/nng/ | |
start prompter | prm | |
intitialize MBS | @start | |
start a short run | rio3::start acq | |
stop the run | rio3::stop acq | |
leave MBS | @stop | |
exit | ||
reset RIOs | resa (2x) | |
wait until reset is done -> no more network processes with rio3 and rio6 should show up | netstat | |
2. | go to working directory | cd ~/mbsrun/ntot/ |
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/ntot | |
open setup_vme_0.ini and setup_vme_1.ini for text editing (if you want to do some special settings) | xemacs setup_vme_0.ini & xemacs setup_vme_1.ini & |
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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 |
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4. | run the automatic setup of the V874B TAPS Modules | (see here) |
5. | login to fwk24 (HV control PC) turn on the detectors you want to use (cf. cabeling scheme) |
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 /datalokal/ntofdaq/lmd/ rawDispRFIO |
7. | login to rio3 or rio6 go to working directory start OPC readout |
telnet rio6 cd mbsrun/ntot ./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 zirkonia: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 |