SVT Results at UNH

First SVT results

This page shows our versions of the analysis results Maurizio posted at http://clasweb.jlab.org/wiki/index.php/First_SVT_results complete with ROOT source. I am shamelessly stealing his wiki code, too.

Details:

• Except for the proton and pion graph, we are using protons generated with momentum range 0.2 to 3.8 GeV, covering all angles uniformly
• The evio output is converted to ROOT output with evio2root
• The gemc commands to generate the two used data sets are:

$GEMC/gemc -GT=BST -PRINT_EVENT=10000 -BEAM_P="proton, 2.0*GeV, 0*deg, 0*deg" \
-SPREAD_P="1.9999*GeV, 180*deg, 360*deg" -SPREAD_V="(0.1, 0.1, 2.5)cm" \
-OUTPUT="evio, proton_500000.ev" -N=500000 -LUMI_P="e-, 11*GeV, 0, 0" \
-LUMI_V="(0, 0, -5)cm" -LUMI_EVENT="100, 124*ns, 2*ns" -USE_PHYSICSL=QGSP \
-HALL_MATERIAL=Vacuum -USE_QT=0

and

$GEMC/gemc -GT=BST -PRINT_EVENT=10000 -BEAM_P="pi+, 2.0*GeV, 0*deg, 0*deg" \
-SPREAD_P="1.9999*GeV, 180*deg, 360*deg" -SPREAD_V="(0.1, 0.1, 2.5)cm" \
-OUTPUT="evio, pion_500000.ev" -N=500000 -LUMI_P="e-, 11*GeV, 0, 0" \
-LUMI_V="(0, 0, -5)cm" -LUMI_EVENT="100, 124*ns, 2*ns" -USE_PHYSICSL=QGSP \
-HALL_MATERIAL=Vacuum -USE_QT=0

• 

  y vs x global coordinate position of hits in the SVT detector.

• 

  Part of the detector sticking out?

• Y vs x3.jpg

  y vs x global coordinate position of hits in the SVT detector. 3 out of 4 SL required.

• 

  Theta distributions. black: all generated events. All other colors: require hits in increasing number of layers

• 

  Edep vs P for protons and pions. Left: both, Center: protons, Right: pions

• 

  Energy deposited versus strip number

• 

  Number of hits. Our binning is very small. (100)

• Theta vs z 1hitperlayer.jpg

  Theta vs generated vertex for hits in all the SVT layers

• 

  Edep

• 

  phi versus z for hits in all the SVT layers

• 

  p versus phi for hits in all the SVT layers

• P vs theta 1hitperlayer.jpg

  p versus theta for hits in all the SVT layers