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Jonathan Asaadi, 06/27/2018 10:22 AM


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.

In this document you will find:

  1. Taking VST Shifts
  2. Starting the DAQ
  3. Online Monitoring
  4. Filling the eLog

Taking VST Shifts

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
  1. Starting the DAQ
  2. Online Monitoring

Advanced Stuff

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".