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PMT-RAS

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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PMT-RAS

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  1. PMT-RAS

  2. Laura's Summer Experience

  3. Turning the Clean Room Into a Dark Room

  4. 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.

  5. LED ~ Light Emitting Diode

  6. Photo Multiplier Tube – Roll Angle Sensor (PMT-RAS)

  7. Oscilloscope readings (PMT-RAS output) Input into LED Signal out of PMT-RAS

  8. Signal Generator The Instruments Oscilloscope Translation Stage Controller High Voltage Power Supply

  9. 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

  10. Extending the barrel

  11. First Test (Green)

  12. Second Test (Green)

  13. Blue Diode

  14. Blue Diode Graphs Overlaid

  15. Calculating the Field of View Distance diode was observed 180L 2L y p Distance from diode to PMT-RAS

  16. Calculating the focus of the lens for blue light focused at infinity

  17. Actual Values

  18. 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.

  19. Slide Show Created By: Laura Rydland

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