1. 17 July 2019
Aric Tate
RPD MC Improvements

2. Outline Geometry Fibers & Visualization Tiles + Fibers w/out Aluminum
Foil
Case
Simulation
Physics List
Parallelization

3. Fibers & Visualization
Each tile now has four holes in which the fibers sit
Tile
Fiber
45 45 view
Top down view of single tile w/o fibers with
wireframe on
Tile
Fiber
Top down view
Configurable Parameters:
hole size
gab between fiber and quartz
distance of hole from tile back
gap has been set to 0.0mm
Visualization can be broken. Wireframe fails for g4subtractsolid in this case. Use “surface” to visualize geometry.

4. Tiles + Fibers without Aluminum
Note: this fiber is embedded and cannot be seen from this view
45 45 view
Top down view
Side view

5. Foil between Fibers Configurable Parameters: foil thickness
foil thickness has been set to 0.016mm

6. small gap between vert/horiz foils
Tile
Fiber
small gap between vert/horiz foils
Foil size increased for visualization purposes here.
Side view

7. Aluminum Case (Vertical Dividers)
Case thickness currently based on gap size
Aluminum Divider
Tile
Foil
Fiber

8. Aluminum Case (Front/Back Plate)

9. Light Production/Transport 1
A new physics list which allows one to turn on/off optical physics has been implemented
A materials class has been created giving the necessary optical properties to materials (quartz, aluminum, polyethylene, PMMA)
Air puck created at top of each fiber and set as sensitive detector. Will be used to record all photons coming up from fiber.

10. Light Production/Transport 2
*all shown tracks are optical photons
Case/Foil Removed
Case Removed
Full Assembly (no top/bot)
Light is currently not being transported up the fibers. This issue is being investigated.

11. Parallelization
In order to make use of these changes to the MC, running multiple instances on a cluster will be required.
A cluster is available to UIUC users which uses the HTCondor software framework. Work is being done to implement this functionality.