Q6. MOSFET calibration were performed in e 6MV gamma beam in a water phantom at calibration condition. An absorbed dose of 1 Gy was delivered. the MOSFET threshold voltage Vth value were vth1= 129 mV and Vth2 = 265 mV before and after irradiation, respectively. Determine the MOSFET calibration factor?
Given :
6MV Gamma beam
Absorbed dose 1 Gy
Before : vth1 = 129 mV
After : vth2= 265 mV
The Caliberation performed in 6 MV
The change in the vth is given as :
Vth = vth2 - vth1
= 265mV - 129 mV
= 136 mV
Now the Input is for 6MV
In the Mosfet the calibration factor is given for response from input callibration and given as
= 136 mV / 6 MV
Q6. MOSFET calibration were performed in e 6MV gamma beam in a water phantom at calibration condition. An absorbed dose...