Difference between revisions of "HRRL radiation footprint simulations"

From New IAC Wiki
Jump to navigation Jump to search
Line 103: Line 103:
 
===HRRL Room Side view===
 
===HRRL Room Side view===
  
[[File:hrrl_room_side.jpg]]
+
[[File:hrrl_room_side.jpg | 200 px]]
 
 
  
 
===HRRL Electron Source and Tungsten Target 45 Degree View===
 
===HRRL Electron Source and Tungsten Target 45 Degree View===

Revision as of 04:15, 10 January 2010

Design a simulation to determine radiation footprint in HRRL cell.


1.) The ceiling is 4 feet thick

2.) there is PB shiedling between the HRRL accelerator room and the accelerator operator station

3.) the dirt is about 10 feet thick on the wall side where the accelerator is going to be mounted

4.) determine shielding wall thickness for HRRL cavity to reduce dose out the door

5.) Determine shielding for Tungsten converter

Drawing

Get a drawing from facilities documenting the shielding in that cell with dimensions


Denton Dance: x4710, may be able to provide drawings. B119 Beam Lab

Material Definitions

Concrete

Concrete has 6 elements and a density of 2.7 g/cm^3

Element Atomic Weight (A) Atomic Number (Z) Proportion by Weight
1 1.0079 1. 0.004
2 15.9994 8. 0.509
3 26.981539 13 0.034
4 28.0855 14. 0.345
5 40.078 20 0.070
6 55.8474 26. 0.038

GEANT4 code


a = 1.0079*g/mole;
  G4Element* elH  = new G4Element(name="Hydrogen",symbol="H" , z= 1., a);
  a = 15.9994*g/mole;
  G4Element* elO  = new G4Element(name="Oxygen"  ,symbol="O" , z= 8., a);
a = 26.981539*g/mole;
  G4Element* elAl  = new G4Element(name="Aluminum",symbol="Al" , z= 13., a);
a = 28.0855*g/mole;
  G4Element* elSi  = new G4Element(name="Silicon",symbol="Si" , z= 14., a);
a = 40.078*g/mole;
  G4Element* elCa  = new G4Element(name="Calcium",symbol="Ca" , z= 20., a);
a = 55.8474*g/mole;
  G4Element* elNi  = new G4Element(name="Iron",symbol="Fe" , z= 26., a);



  density =2.7*g/cm3;
  G4Material* Concrete = new G4Material(name="Concrete ",density,ncomponents=6);
  Concrete->AddElement(elH, fractionmass=0.4*perCent);
  Concrete->AddElement(elO, fractionmass=50.9*perCent);
 Concrete->AddElement(elAl, fractionmass=3.4*perCent);
 Concrete->AddElement(elSi, fractionmass=34.5*perCent);
 Concrete->AddElement(elCa, fractionmass=7.0*perCent);
 Concrete->AddElement(elNi, fractionmass=3.8*perCent);

Relative Rates

The first step in the simulation will be to compare relative radiation rates at the exit of the accelerator room. The radiation exiting the accelerator room before and after moving the accelerator will be simulated. Although all particles can be tracked we will mostly be interested in gamma and neutron fluxes through the door. The ratio of before/after moving fluxes for gamma and neutron should be plotted as a function of energy.

Geometry

[HRRL room dimension measured by Jason Swanson]

HRRL Geom by Sadiq

what is the thicknes of the walls below.

HRRL Geom by sadiq.jpg

GEANT4 Simulation Setup

HRRL Room Top view

Hrrl room walls numbered.jpg

Hrrl room top.jpg

HRRL Room 45 Degree View

Hrrl room 45deg.jpg

HRRL Room Side view

Hrrl room side.jpg

HRRL Electron Source and Tungsten Target 45 Degree View

Hrrl beam and target 45deg.jpg


HRRL Electron Source and Tungsten Target Top View

Hrrl beam and target top.jpg


HRRL New Electron Source

New e- Source Position.jpg

Geant4 Codes

GPS e- Source

/gps/particle e-

/gps/energy 10. MeV

/gps/pos/type Plane

/gps/pos/shape Circle

/gps/pos/radius 0.6 cm


/gps/pos/sigma_r 3 mm


/gps/pos/sigma_x 3 mm

/gps/pos/sigma_y 3 mm


Old Position, -Z direction:

/gps/pos/centre 380 101.6 -93.68 cm


New Postion, X direction:

/gps/pos/centre 66.5 101.6 93.93 cm

/gps/direction 1 0 0

Physics List

File:Physics List.txt


10 MeV Gamma hit 2 meter D2O target to show neutron from disintegrated deuterium.

Yellow: neutron

Red: electron

Gray: gamma


Neutron.jpg

Dectector Construction

File:Detector Construction.txt


Electron and photon interactions with the target and the walls

[1]Positrons