Wiki » History » Version 17

Version 16 (Gustavo Valdiviesso, 06/27/2018 09:01 PM) → Version 17/81 (Gustavo Valdiviesso, 06/27/2018 10:20 PM)

h1. SBND VST Wiki

This is the wiki for the SBND's Vertical Slice Test (VST). This is an integration of the cold and warm electronics with DAQ and online monitoring using LArIAT's cryostat and TPC.

h2. Taking VST Shifts

In summary, a VST shift is just like a LArIAT shift, with a few extras. So the LArIAT Wiki and *Before your first shift* page is where you want to start.

and, if you didn't do this yet, make sure you are in the SBND Shift ground at Google Hangouts:

h2(count). When you are about to h2. At the start of the shift

Contact the current shifter in the hangouts group to tell him/her that you are getting ready. This will give the current shifter time to fill in his the End Of Run End_of_Run report. Don't log into the hangouts yourself just yet. Wait until the current shifter tells you that he/she is ready to give you the controls.


Setup your shift station

station, either from a remote connection or from ROC-West, follow following these instructions:

h2(count). Connect as the SBND shifter in the hangouts

When the previous shifter had time to call the MCR and declare the end of his/her shift, you may log


into the shifter's Hangouts account with:

using with the current SBND DocDB password. The SBND Shift chat is used by the collaborators to communicate with the shifters and between themselves about the VST operations.

h2(count). Log into the SBND Electronic Logbook

with your Services user. Make an *VST Start of Run* entry and follow the checklist, which includes calling the Main Control Room (see next step).

h2(count). Call the Main Control Room (MCR)

For any collaborator, to call MCR (x3721) at the beginning and ending of each shift. If you are remote, you can use the hangouts add yourself to do so, but you may have to install a plugin first.

Main Control Room (internationally) +1.630.840.3721

the MCR that you are the next LARIAT SHIFTER and if you are local or remote. If you are remote, inform the MCR of your contact number, which is the hangouts voice service:

+1 331 442 4354
chat follow this link:

Before anything else: How to set up your shift station

Remember to call MCR (x3721) at the beginning and ending of each shift!!!
Main Control Room (internationally) +1.630.840.3721

If remote: please use google hangouts to make the phone call to MCR, to be sure that it works with your setup! (it might not work on Firefox, use Chrome/IE/Safari).
We have heard a few complaints from MCR that this phone number is unreliable, but by actually using it to make the call, you will greatly reduce the chance of it not working if they try to call you.

In the LArIAT e-log, fill out the Start of Shift Checklist
Instructions to check how much remaining Wire Chamber Gas
Find out from the shifter before you if there are any issues, and read the MCR elog for status of accelerators
Refresh and read the Run Plan:
what beam request LArIAT wants
any interruptions to expect
special conditions or known problems

Log into the "GMail account":
with the current SBND DocDB password. The SBND Shift chat is used by the collaborators to communicate with the shifters and between themselves about the VST operations. For any collaborator, to add yourself to the chat follow this link

*List of experts to call can be found* "on this Google Spreadsheet":
# Starting the DAQ
# Online Monitoring

h1. Advanced Stuff

h2. How to run the DAQ for the BNL-Nevis integration test

1. Make sure the Nevis crate and NIM bin are powered. Experts: (on-site) Davio Cianci, (off-site) José I. Crespo (Skype:
2. ssh into the DAQ machine
Log into the SBND gateway (or you can create an FNAL VPN connection and skip sbnd-daq00, not needed on FNAL site)
> ssh -Y
Log into the LArIAT gateway
> ssh -Y
Log into the DAQ server using the common sbnd account (reserved for DAQ)
> ssh -Y sbnd@lariat-daq04
3. Go to the jcrespo/ directory
> cd jcrespo
Run the DAQ-decoder-plotter script
> ./
and follow the instructions printed on screen. This script runs the DAQ in calibration mode (CALIB pulses are sent to the Magic Blue Box every 1 s) -- once you have collected the desired number of events, it requires you to stop the DAQ using CTRL + C twice --, then runs the binary decoder, and finally runs a ROOT analysis to plot the waveforms.

The data is saved in the directory /home/nfs/sbnd/jcrespo/runs
The script makes a new directory for each run named RunYearMonthDayHourMinutesSecond (e.g. Run20180620113511).
The raw binary data is the file named output_NevisTPCCALIB_generator.dat. For a hexdump, you can use
> hexdump -v -e '8/2 "%04X ""\n"' output_NevisTPCCALIB_generator.dat | less
(it will display the data in 8 columns with 2 bytes each). The ADC data is encoded in the lower 12 bits (3 last hex characters) of the words beginning with "0".