PMT-RAS

1 / 25

# PMT-RAS - PowerPoint PPT Presentation

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.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PMT-RAS

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Laura's Summer

Experience

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.

Input into LED

Signal out of PMT-RAS

Signal Generator

The Instruments

Oscilloscope

Translation Stage Controller

High Voltage Power Supply

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

First Test

(Green)

Calculating the Field of View

Distance diode was observed

180L

2L

y

p

Distance from diode to PMT-RAS

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.

Slide Show

Created

By:

Laura Rydland