Diodes, MOSFETs, TLDs

Would you use a diode for absolute dosimetry?

No

Diodes have an intrinsic bias (electrical). Why?

Because p and n sides automatically have more holes and electrons.

QA: Daily, Weekly, Monthly, etc. for diodes and MOSFETS?

Is there a dose rate dependence for diodes?

Yes and its different for each of p vs. n.

What do you measure for diodes?

Current (or maybe voltage).

What do you measure for MOSFETs?

Volts (cGy/mV).

Know the picture of the MOSFET design.

MOSFETs work great in parallel with eachother so you can compare data.

How large are MOSFETs?

Extremely small but macroscopic. ~1 mm x 5-10 mm.

Can MOSFETS be used for brachy?

Yes, but need to calibrate for brachy energies.

MOSFETs have permanent dose storage.

This means you can't take away dose that has already been delivered. Eventually you need to throw them out.

Energy curves for OSLDs

Can make different calibration curves for each energy, but not necessary.