Meeting-04072022

FADC mode10 decoding update

• Julie, Pramita, Oliver and DJH had a meeting last week to discuss online software development.

• DJH implemented the changes needed for mode10 decoding to the THcShowerArray and THcShowerPlane classes in hcana (firmware_update branch). This means we can now use the SHMS pre-shower and shower calorimeters as prototypes for histogram / display / gui development.

• In order to do so, we can use data from a series of special mode10 runs taken during the recent PionLT experiment (listed at https://hallcweb.jlab.org/wiki/index.php/PionLT_2021_Physics_Status). The ten most recent runs (14024 - 14464) have been replayed and root files are available at: /work/halla/SBS/dhamilto/nps_mode10 (will move to /work/hallc/NPS/dhamilto/mode10 when I get the necessary permission).

• You can find the corresponding variables in the T tree: eg the waveform branch for the SHMS shower is called P.cal.fly.SampWaveform, while the variables derived from the waveforms are called P.cal.fly.adcSampPulseAmp, adcSampPulseInt, adcSampPulseTime or adcSampPed.

• Example scripts for waveform display:

• SHMS Pre-shower: Media:Plot_SHMS_PSCal_FADC.C, output Media:SHMS_PS_Mode10Display.png
• SHMS Shower: Media:Plot_SHMS_SHCal_FADC.C, output Media:SHMS_SH_Mode10Display.png

Instructions for replay set up

• If you prefer to set up the full replay chain, brief instructions are given below:

git clone https://github.com/JeffersonLab/hcana

cd hcana

git submodule init

git submodule update

git checkout firmware_update

mkdir build

cmake -DCMAKE_INSTALL_PREFIX=../ ../

• You'll then need to add an $HCANA environment variable and add $HCANA/bin to $PATH and $HCANA/lib64 to $LD_LIBRARY_PATH

git clone https://github.com/JeffersonLab/hallc_replay_lt

cd hallc_replay_lt

git submodule init

git submodule update

• Editing and calling SymLinkSetup.sh should help you set up the necessary symbolic links.

• Quite a few of the mode10 runs are already on the cache disks at:

/cache/mss/hallc/c-pionlt/raw

• Run a replay:

hcana SCRIPTS/SHMS/PRODUCTION/replay_production_shms_coin.C