Linac Run Plan April 2018, Dr. McNulty

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Absorbed Dose Information

Calculations (1)

Assuming 100mApulse and a pulse width of 100ns

Then 100mApulse=100mCspulse=0.1Cspulse

0.1Cspulse(100ns)=10109Cpulse

10109Cpulse1 e1.6021019=6.24221010epulse

Using a distance of 25cm for all simulations following.

OSL

11000 of a pulse. ~62mil e- simulated, ~62bil e- per pulse. With beam parameters given above.

Deposited Energy: 4.46596106MeV

OSL geometry: 0.501cm diameter cylinder of 0.03cm thickness with beam incident on flat face.

OSL Crystal density=3.9698gcm3

Mass of a single OSL crystal: (π(0.2505)2(0.03))(3.9698)=0.0234777g

Scaling deposited energy by 1000 to account for only shooting a 1000th of a pulse, the deposited energy becomes 4.46596109MeV

Converting to Joules for dose calculation: 4.46596109MeV=7.15525104J

Average dose per pulse 7.15525104J0.0234777103 Kg=30.4768 Gy=3047.68 rad

Quartz

11000 of a pulse. ~62mil e- simulated, ~62bil e- per pulse. With beam parameters given above.

Deposited Energy: 4.71875108MeV

Quartz Geometry: 1 inch cylinder with electrons incident upon the base of the cylinder.

Quartz density=2.32gcm3

Mass of Quartz used in simulation: (π(1.27)2(2.54))(2.32)=29.8593g

Scaling deposited energy by 1000 to account for only shooting a 1000th of a pulse, the deposited energy becomes 4.718751011MeV

Converting to Joules for dose calculation: 4.718751011MeV=0.0756027J

Average dose per pulse 0.0756027 J29.8593103 Kg=2.53196 Gy=253.196 rad

Calculations (2)

Cut current by a factor of 4. 100mA->25mA

Assuming 25mApulse and a pulse width of 100ns

Then 25mApulse=25mCspulse=0.025Cspulse

0.025Cspulse(100ns)=2.5109Cpulse

2.5109Cpulse1 e1.6021019=1.560551010epulse

Using a distance of 25cm for all simulations following.

OSL

11000 of a pulse. ~15mil e- simulated, ~15bil e- per pulse. With beam parameters given above.

Deposited Energy: 1.11636106MeV

OSL geometry: 0.501cm diameter cylinder of 0.03cm thickness with beam incident on flat face.

OSL Crystal density=3.9698gcm3

Mass of a single OSL crystal: (π(0.2505)2(0.03))(3.9698)=0.0234777g

Scaling deposited energy by 1000 to account for only shooting a 1000th of a pulse, the deposited energy becomes 1.11636109MeV

Converting to Joules for dose calculation: 1.11636109MeV=1.78841104J

Average dose per pulse 1.78841104J0.0234777103 Kg=7.61748 Gy=761.748 rad

Quartz

11000 of a pulse. ~15mil e- simulated, ~15bil e- per pulse. With beam parameters given above.

Deposited Energy: 9.82027107MeV

Quartz Geometry: 1 inch diameter, 0.5 inch tall cylinder with electrons incident upon the base of the cylinder.

Quartz density=2.32gcm3

Mass of Quartz used in simulation: (π(1.27)2(2.54))(2.32)=29.8593g

Scaling deposited energy by 1000 to account for only shooting a 1000th of a pulse, the deposited energy becomes 9.820271010MeV

Converting to Joules for dose calculation: 9.820271010MeV=0.0157321J

Average dose per pulse 0.0157321 J29.8593103 Kg=0.526873 Gy=52.6873 rad

Calculations (3)

Changed distance from end of beam pipe from 25cm to 50cm.

Cut current by a factor of 4. 100mA->25mA

Assuming 25mApulse and a pulse width of 100ns

Then 25mApulse=25mCspulse=0.025Cspulse

0.025Cspulse(100ns)=2.5109Cpulse

2.5109Cpulse1 e1.6021019=1.560551010epulse

OSL

11000 of a pulse. ~15mil e- simulated, ~15bil e- per pulse. With beam parameters given above.

Deposited Energy: 9.29701105MeV

OSL geometry: 0.501cm diameter cylinder of 0.03cm thickness with beam incident on flat face.

OSL Crystal density=3.9698gcm3

Mass of a single OSL crystal: (π(0.2505)2(0.03))(3.9698)=0.0234777g

Scaling deposited energy by 1000 to account for only shooting a 1000th of a pulse, the deposited energy becomes 9.29701108MeV

Converting to Joules for dose calculation: 9.29701108MeV=1.48938104J

Average dose per pulse: 1.48938104J0.0234777103 Kg=6.34381 Gy=634.381 rad

Quartz

11000 of a pulse. ~15mil e- simulated, ~15bil e- per pulse. With beam parameters given above.

Deposited Energy: 9.82027107MeV

Quartz Geometry: 1 inch diameter, 0.5 inch tall cylinder with electrons incident upon the base of the cylinder.

Quartz density=2.32gcm3

Mass of Quartz used in simulation: (π(1.27)2(2.54))(2.32)=29.8593g

Scaling deposited energy by 1000 to account for only shooting a 1000th of a pulse, the deposited energy becomes 9.820271010MeV

Converting to Joules for dose calculation: 9.820271010MeV=0.0157321J

Average dose per pulse 0.0157321 J29.8593103 Kg=0.526873 Gy=52.6873 rad




Thesis