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PMT-RAS. Laura's Summer Experience. Turning the Clean Room Into a Dark Room. Objective: Test to See if PMT-RAS is Focused for Blue Light. Test output of PMT-RAS receiving light from a pinhole or open diode at different turns of the barrel.

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Presentation Transcript
slide2

Laura's Summer

Experience

objective test to see if pmt ras is focused for blue light
Objective: Test toSee if PMT-RAS is Focused for Blue Light
  • Test output of PMT-RAS receiving light from a pinhole or open diode at different turns of the barrel.
  • Graph data in Excel and calculate FWHM (full width half max).
  • Calculate the field of view.
  • Calculate the focus of the lens, using the data collected, for blue light focused at infinity.
slide7

Oscilloscope readings (PMT-RAS output)

Input into LED

Signal out of PMT-RAS

slide8

Signal Generator

The Instruments

Oscilloscope

Translation Stage Controller

High Voltage Power Supply

slide9

Why was it important to focus the instrument for blue light?

Light refraction for different wave lengths

Blue 440nm

Green 546nm

Red 633 nm

*Shorter wave lengths have larger refractive indices

slide17

First Test

(Green)

slide21

Calculating the Field of View

Distance diode was observed

180L

2L

y

p

Distance from diode to PMT-RAS

slide24

Conclusion:

~After the focus length was calculated according to blue light focused at infinity, it was established that the PMT-RAS is in focus and no extension of the barrel will be needed.

slide25

Slide Show

Created

By:

Laura Rydland