Botany Canyon

Using CHAMBER CM as a phantom

Phase space template                                                             #!GUI1.0
AIR700ICRU
0, 0, 0, 1, 0, 2, 0,  IWATCH ETC.
1000000000, 33, 97, 71.99, 0, 0, 0, 0,  NCASE ETC.
9, 21, 1, 1, 0, 0, 0, 0, 0, 0,  IQIN, ISOURCE + OPTIONS
$USER_HOME/phsp/tbVar/TrueBeam_v2_6X_00.IAEAphsp
0, 0, 0.7, 0.01, 0, 0, 0,  0 , ECUT,PCUT,IREJCT,ESAVE
0, 0, 0, 0, 0,  PHOTON FORCING
0,  SCORING INPUT
0,  DOSE COMPONENTS
0, Z TO FRONT FACE
*********** start of CM SYNCJAWS with identifier JAWS  ***********
20, RMAX
Jaws
2, 0, # PAIRED BARS OR JAWS, field type
X
10, 12, 0.5, 0.6, -0.5, -0.6, 
Y
13, 14, 0.65, 0.7, -0.65, -0.7, 
0.7, 0.01, 0, 0, 
0.7, 0.01, 0, 0, 
W700ICRU
0.7, 0.01, 0, 0, 
W700ICRU
*********** start of CM SYNCVMLC with identifier MLC  ***********
20, RMAX
MLC
0, 3, 1, ORIENT, NGROUP, MODE
44.3, ZMIN
6.5, ZTHICK
0.535, 0.04, 0.04, 0.135, 0.369, 0.14, 44.3, 44.58, 47.57, 47.78, 48.96, 49.39, 2, 50.58, 50.8, 
0.249, 0.04, 0.04, 0.105, 0.138, 0.145, 44.4, 44.66, 45.56, 45.89, 2, 47.67, 47.68, 50.68, 50.68, 
0.25, 0.04, 0.04, 0.075, 0.14, 0.14, 44.3, 44.42, 47.7, 47.7, 49.2, 49.53, 2, 50.44, 50.7, 
10, 1
40, 2
10, 1
-10.5, START
0.025, LEAFGAP
0, ENDTYPE
8, ZFOCUS or RADIUS of leaf ends
0, ZFOCUS of leaf sides
$EGS_HOME/BEAM_phsp/pat09.mlc
0.7, 0.01, 0, 0, 
AIR700ICRU
0.7, 0.01, 0, 0, 0, 
W700ICRU
0.7, 0.01, 0, 0, 
AIR700ICRU
*********** start of CM SLABS with identifier AIR  ***********
30, RMAX
Air
1, NSLABS
50.8, ZMIN
30, 0.7, 0.01, 0, 0, 0
AIR700ICRU
*********** start of CM CHAMBER with identifier PHAN ***********
25, RMAX
Water phantom for CAX measurment
80.8, ZMIN
0, -3, 0, N_TOP, N_CHM, N_BOT
0.5, 5, 10, RADII FOR CENTRAL PART
0.15, 100, ZTHICK, FLAG FOR GROUP 1 IN CENTRAL PART
0.30, 20, ZTHICK, FLAG FOR GROUP 2 IN CENTRAL PART
0.45, 20, ZTHICK, FLAG FOR GROUP 3 IN CENTRAL PART
0.7, 0.01, 1, 0, 
H2O700ICRU
0.7, 0.01, 0, 0,   chamber wall
H2O700ICRU
0.7, 0.01, 0, 0,   gap
H2O700ICRU
0.7, 0.01, 0, 0,   container
H2O700ICRU
0, MRNGE
*********************end of all CMs*****************************
 #########################
 :Start MC Transport Parameter:
 
 Global ECUT= 0.7
 Global PCUT= 0.01
 Global SMAX= 5
 ESTEPE= 0.25
 XIMAX= 0.5
 Boundary crossing algorithm= EXACT
 Skin depth for BCA= 0
 Electron-step algorithm= PRESTA-II
 Spin effects= On
 Brems angular sampling= Simple
 Brems cross sections= BH
 Bound Compton scattering= Norej
 Compton cross sections= default
 Pair angular sampling= Simple
 Pair cross sections= BH
 Photoelectron angular sampling= Off
 Rayleigh scattering= Off
 Atomic relaxations= Off
 Electron impact ionization= Off
 Photon cross sections= xcom
 Photon cross-sections output= Off
 
 :Stop MC Transport Parameter:
 #########################

Occupational radiation exposure limits

NRC: 10 CFR Part 20.1201

http://www.nrc.gov/reading-rm/doc-collections/cfr/part020/part020-1201.html

The licensee shall control the occupational dose to individual adults, except for planned special exposures under § 20.1206, to the following dose limits.

Total effective dose equivalent:                                            5 rems (0.05 Sv)

Deep-dose equivalent, organ or tissue:                            50 rems (0.5 Sv).

Annual limits:

Lens dose equivalent:                                                             15 rems (0.15 Sv)

Shallow-dose equivalent, Skin of the Whole Body       50 rem (0.5 Sv)

Skin of any extremity                                                              50 rem (0.5 Sv)

 

Emergencies:

Doses received in excess of the annual limits, including doses received during accidents, emergencies, and planned special exposures, must be subtracted from the limits for planned special exposures that the individual may receive during the current year