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

events in lar and gar
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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


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SLIDE 1

Events in LAr and GAr

Tom Junk Fermilab October 6, 2017

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  • T. Junk GArTPC Meeting

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SLIDE 2

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

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SLIDE 3

Example from the LBNO ND Description Technote

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  • E. Noah, A. Curioni, Y. Karadzhov, T. Stainer, A. Blondel
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SLIDE 4

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/cm3, or GAr with 0.0178 g/cm3

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SLIDE 5

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)

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SLIDE 6

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LAr

A CC Event

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SLIDE 7

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GAr

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SLIDE 8

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GAr+B

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SLIDE 9

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LAr

Showing Neutrons

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SLIDE 10

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GAr+B

Showing Neutrons

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SLIDE 11

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LAr

Another CC Event, with two pions

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SLIDE 12

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GAr

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SLIDE 13

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GAr+B

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SLIDE 14

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

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