Events in LAr and GAr Tom Junk Fermilab October 6, 2017 10/6/17 - PowerPoint PPT Presentation

Events in LAr and GAr Tom Junk Fermilab October 6, 2017 10/6/17 T. Junk GArTPC Meeting 1

Suggestions from Jen • GAr has longer tracks for the same momentum: lower threshold for detection • Differential measurements easier in GAr than LAr for low-energy recoils • Run some GENIE MC and look at a few events' MC Truth. Suggested CC 1 pi and multi-pi events. • Try with a magnetized GAr detector 10/6/17 T. Junk GArTPC Meeting 2

Example from the LBNO ND Description Technote E. Noah, A. Curioni, Y. Karadzhov, T. Stainer, A. Blondel 10/6/17 T. Junk GArTPC Meeting 3

Using LArSoft for this • Convenient geometry: 1x2x6 Far Detector Workspace. • Too big! Each APA is 6 m high and 2.5 m wide, 2x 3.6m drift • But we'll see the events for sure. • LAr with density 1.4 g/cm 3 , or GAr with 0.0178 g/cm 3 10/6/17 T. Junk GArTPC Meeting 4

GENIE and Event Displays • Ran GENIE with inclusive neutrinos with the DUNE ND spectrum (only 10 events) • Ran GEANT4 to simulate LAr, GAr, and GAr+magnetic field (1 tesla, along x ) • Used gallery to make displays of MCParticle trajectory points • Colors: Black: muons Blue: protons Red: charged pions Magenta: electrons Green: neutrons (when shown) 10/6/17 T. Junk GArTPC Meeting 5

LAr A CC Event 10/6/17 T. Junk GArTPC Meeting 6

GAr 10/6/17 T. Junk GArTPC Meeting 7

GAr+B 10/6/17 T. Junk GArTPC Meeting 8

LAr Showing Neutrons 10/6/17 T. Junk GArTPC Meeting 9

GAr+B Showing Neutrons 10/6/17 T. Junk GArTPC Meeting 10

LAr Another CC Event, with two pions 10/6/17 T. Junk GArTPC Meeting 11

GAr 10/6/17 T. Junk GArTPC Meeting 12

GAr+B 10/6/17 T. Junk GArTPC Meeting 13

Gallery Macros and Examples • Look in /dune/data/users/trj/gartpc/genielarvsgar • source setup.sh to setup dunetpc and gallery • cmc.C is a gallery macro to plot MC trajectory points. Just runs in root without compilation (fast enough) • Some fcl files and modified GDML files to do the quick study 10/6/17 T. Junk GArTPC Meeting 14