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What is a Photomultiplier Tube?

Total questions: 12

Worksheet time: 6mins

Name
Class
Date
1.

What is the function of a photo multiplier tube (PMT)?

a)

Convert electrical signal into light

b)

Convert radiation into electrical signal

c)

Convert electrical signal into radiation

d)

Convert light into radiation

2.

What is the job of the photocathode in a PMT?

a)

To convert electrical signal into light

b)

To convert radiation into light

c)

To convert light into electrical signal

d)

To amplify electrical signal

3.

What is the phenomenon called when a metal plate in a PMT is bombarded by electrons and emits more electrons?

a)

Scintillation

b)

Photoelectric effect

c)

Magnetic permeability

d)

Secondary emission

4.

What is the purpose of the dynodes in a PMT?

a)

To convert light into radiation

b)

To amplify electrons into more electrons

c)

To convert radiation into electrical signal

d)

To amplify radiation into more radiation

5.

What is the typical applied voltage per dynode in a PMT?

a)

50 to 100 volts

b)

10 to 50 volts

c)

150 to 200 volts

d)

100 to 150 volts

6.

What material are the dynodes in a PMT coated with?

a)

Magnesium oxide

b)

Aluminum nitride

c)

Silicon carbide

d)

Copper sulfate

7.

What is the purpose of the anode in a PMT?

a)

To emit scintillation light

b)

To convert light into radiation

c)

To collect amplified electrons

d)

To amplify electrical signal

8.

What is the total amplification if there is a magnification of four at every PMT dynode and there are five dynodes?

a)

256

b)

2048

c)

625

d)

1024

9.

What is the purpose of a high voltage supply in a PMT?

a)

To amplify radiation

b)

To emit scintillation light

c)

To amplify electrical signal

d)

To convert light into radiation

10.

What is the purpose of the entrance window in a PMT?

a)

To collect amplified electrons

b)

To allow photons to enter

c)

To convert light into radiation

d)

To amplify electrical signal

11.

What is the effect of magnetic fields on PMTs?

a)

Distort electron pathways

b)

Emit scintillation light

c)

Convert light into radiation

d)

Amplify electrical signal

12.

What is the purpose of the mu-metal encasing in a PMT?

a)

To protect against low magnetic fields

b)

To amplify electrical signal

c)

To amplify radiation

d)

To emit scintillation light