I checked for a possible exposure of the VDC frame to an adjacent octant
by rotating the VDC to the next octant.

=> The VDC frame will be hit by electrons of an adjacent octant 
   for a total length of 280cm (250cm inner length + 2*15cm frame)

So far for a total length of 230cm (200cm inner + 2*15cm frame) there is enough space left.

------------------------

VDC dimensions for Qweak:

  G10Frame_Thickness        =   0.5*2.54*cm;
  G10Frame_BorderWidthInX   =  15.0*cm;
  G10Frame_BorderWidthInY   =  15.0*cm;
  G10Frame_InnerLength      = 200.0*cm; // 78 inch 
  G10Frame_InnerWidth       =  50.0*cm; // 18 inch

  G10Frame_OuterLength      = G10Frame_InnerLength + G10Frame_BorderWidthInX; 
  G10Frame_OuterWidth       = G10Frame_InnerWidth  + G10Frame_BorderWidthInY; 

 // Position for 12 o'clock orientation
  VDC_CenterFront_XPos        =   0.0*cm;
  VDC_CenterFront_YPos        = 274.53*cm;  // SW for 20.75 deg
  VDC_CenterFront_ZPos        = 437.0*cm;   // SW: 330.0 +107.0

  VDC_FrontBackDistance       = 50.0*cm; // center to center

  MeanTrackAngle             =  20.8*degree;  // also tilting angle of VDcs  // 
  VDC_RotationAngleInPhi     =  45.0*degree;   

.

#
# Macro file for the initialization phase of "exampleN02.cc"
# when runing in interactive mode
#
# Sets some default verbose
#

#/control/verbose 1
#/control/saveHistory
#
#/run/verbose 1
#/event/verbose 1
#/tracking/verbose 1
#/hits/verbose 1

#  HOPELESS: /particle/process/inactivate does NOT WORK !!!
#
# deactivate physical processes that we do not need 
# check http://www-heaf.hepl.hiroshima-u.ac.jp/glast/glast-hp/Geant4/G4command.txt
#
#Candidates for processes : all NotDefined Transportation Electromagnetic Optical Hadronic Photolepton_hadron 
#                           Decay General Parameterisation UserDefined
#
#/particle/process/inactivate opticalphoton # ignored !!
#/particle/process/inactivate Cerenkov
#/particle/process/dump

#
# Store particle trajactories for visualisation
#
/tracking/storeTrajectory 1
#/tracking/storeTrajectory 0

# Create a scene handler for a specific graphics system
# (Edit the next line(s) to choose another graphic system)
#
# Invoke the OpenGL Basic 3D-Viewer: interactive display
#/vis/open OGLIX

# Invoke the Coin3D (public OpenInventor) driver: interactive
# Note: close Coin3D with  File->Escape and again File->Escape,
# otherwise the root file is corrupted 
/vis/open OIX


# Invoke the WIRED driver: offline display
#/vis/open HepRepFile

# Invoke the VRML driver: offline display (freewrl)
#/vis/open VRML2FILE

# Invoke the DAWN  driver: offline display
#/vis/open DAWNFILE

#
# Create a new empty scene
#
/vis/scene/create


#
# Declare that the world volume should be added to the scene
#
/vis/scene/add/volume

#
# Add axis (has to be after /vis/scene/create )
#
#/vis/scene/add/axes


#
# Attach scene to scenehandler
#
/vis/sceneHandler/attach

#
# Draw a picture that has just the detector (no trajectories or hits).
#
#/vis/viewer/flush

#
# Declare that trajectories and hits should be added to the scene
#
/vis/scene/add/trajectories

# Adding hits: Drift Cell response 
#/vis/scene/add/hits

# Set camera
/vis/viewer/reset
#/vis/viewer/set/viewpointThetaPhi 90 180 deg
#/vis/viewer/set/viewpointThetaPhi 90 90 deg
#/vis/viewer/set/viewpointThetaPhi 90 0 deg
/vis/viewer/set/viewpointThetaPhi 60 20 deg
/vis/viewer/zoom 2.0
/vis/viewer/set/style surface
#/vis/viewer/set/style surface2
#/vis/viewer/flush

# meaning unclear
/vis/scene/notifyHandlers

#
# for drawing the tracks
# (if too many tracks cause core dump => storeTrajectory 0)
#
# If multiple events in one run, accumulate all events into a single
# graphical image.  If this line is commented out, each event will instead
# appear in a separate image.
/vis/scene/endOfEventAction accumulate

# refresh image
/vis/scene/endOfRunAction refresh


#==========================
# Physical Process related
#==========================
#/Physics/CerenkovMaxPhotonsPerStep 300

#==========================
# Target related
#==========================
/Target/SetCenterPositionInZ  -650.0 cm
/Target/SetTargetMaterial    Vacuum

#==========================
# Cerenkov Detector related
#==========================
#  Air    : without Cerenkov light production 
#  Quartz  :with    Cerenkov light production
# 
# angle is definedagaing vertical (y) axis
# - a tilt angle of 0.0*deg means vertical 
# - positive angle will tilt detector against target
#
/Cerenkov/SetCerenkovMaterial HeGas
#/Cerenkov/SetCerenkovMaterial SiO2
#/Cerenkov/SetCerenkovMaterial Quartz

# positions to be extracted from SolidWorks
# or by Juliette Mammei's hit distribution
# on the vertical detector plane
 
/Cerenkov/SetCenterPositionInX     0.0 cm
/Cerenkov/SetCenterPositionInY   329.0 cm 
/Cerenkov/SetCenterPositionInZ   590.0 cm
/Cerenkov/SetTiltingAngle          0.0 degree

#==========================
# VDC related
#==========================

# here you can set the position of the Front VDC (upstream)
# The Back VDC will automatically repositioned relative to the Front VDC
#/VDC/SetMeanTrackAngle           20.8 degree
#/VDC/SetFrontBackDistance        50.0 cm 
/VDC/SetFrontCenterPositionInX     0.0 cm
/VDC/SetFrontCenterPositionInY   270.0 cm
/VDC/SetFrontCenterPositionInZ   437.0 cm

# Angle Orientation in Phi
# 90.0 degree = octant 1 in 12 o'clock position
# 45.0 degree = octant2
#/VDC/SetRotationAngleInPhi  90.0 degree
/VDC/SetRotationAngleInPhi  45.0 degree


# angle in respect to SHORT Frame side
/VDC/DriftCell/SetWireAngleFront     60.0 degree
/VDC/DriftCell/SetWireAngleBack     -60.0 degree
#/VDC/DriftCell/SetWireAngleFront     45.0 degree
#/VDC/DriftCell/SetWireAngleBack     -45.0 degree

/VDC/DriftCell/SetFullHeight         60.0 cm
/VDC/DriftCell/SetDCNumberPerPlane    301

#==============================================
# Thickness = 64/64 inch
/VDC/DriftCell/SetFullThickness      25.4 mm 

# Thickness = 68/64 inch
#/VDC/DriftCell/SetFullThickness      26.9875 mm
#==============================================

# FullWidthOnFrame = 25/64 inch
#/VDC/DriftCell/SetFullWidthOnFrame   9.9219 mm
#/run/beamOn 10000
#/Qweak/PrimaryGenerator/ResetNtupleEventCounter

# FullWidthOnFrame = 26/64 inch
#/VDC/DriftCell/SetFullWidthOnFrame   10.3188 mm
#/run/beamOn 1
#/Qweak/PrimaryGenerator/ResetNtupleEventCounter

# FullWidthOnFrame = 27/64 inch
#/VDC/DriftCell/SetFullWidthOnFrame   10.7156 mm
#/run/beamOn 10000
#/Qweak/PrimaryGenerator/ResetNtupleEventCounter

# FullWidthOnFrame =  28/64 inch
/VDC/DriftCell/SetFullWidthOnFrame   11.1125 mm
/run/beamOn 1000
#/Qweak/PrimaryGenerator/ResetNtupleEventCounter

# FullWidthOnFrame = 29/64 inch
#/VDC/DriftCell/SetFullWidthOnFrame   11.5094 mm
#/run/beamOn 10000
#/Qweak/PrimaryGenerator/ResetNtupleEventCounter

# FullWidthOnFrame = 30/64 inch
#/VDC/DriftCell/SetFullWidthOnFrame   11.9063 mm
#/run/beamOn 10000
#/Qweak/PrimaryGenerator/ResetNtupleEventCounter

# FullWidthOnFrame = 31/64 inch
#/VDC/DriftCell/SetFullWidthOnFrame   12.3031 mm
#/run/beamOn 10000
#/Qweak/PrimaryGenerator/ResetNtupleEventCounter

# FullWidthOnFrame = 32/64 = 1/2 inch
#/VDC/DriftCell/SetFullWidthOnFrame   12.7 mm
#/run/beamOn 10000
#/Qweak/PrimaryGenerator/ResetNtupleEventCounter