Difference between revisions of "MainPage:Nuclear:Summer2016:PWO"
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The light transmission of each crystal was measured using the Lambda 950 | The light transmission of each crystal was measured using the Lambda 950 | ||
Spectrophotometer. The crystals were placed in the second compartment and a Labjack was installed and secured to place the crystal at the same height as the light beam. On the Labjack, fixed placement guides were put in place to ensure the constant crystal placement across all trials An iris with a diameter of 11.5 mm was also installed and secured in the same compartment to ensure the beam diameter was located within the crystal's dimensions. At machine startup and every five trails, the machine was aut-ozeroed to ensure accuracy of measurements. The spectrophotometer settings were as follows: _____ | Spectrophotometer. The crystals were placed in the second compartment and a Labjack was installed and secured to place the crystal at the same height as the light beam. On the Labjack, fixed placement guides were put in place to ensure the constant crystal placement across all trials An iris with a diameter of 11.5 mm was also installed and secured in the same compartment to ensure the beam diameter was located within the crystal's dimensions. At machine startup and every five trails, the machine was aut-ozeroed to ensure accuracy of measurements. The spectrophotometer settings were as follows: _____ | ||
| − | [[File:950spectrometer.jpg|thumb|left|350px| The Lambda 950 Spectrometer | + | [[File:950spectrometer.jpg|thumb|left|350px| The Lambda 950 Spectrometer for measurement of light transmission]] |
| − | [[File:Placement_guides.png|thumb|left|350px| Placement guides used to fix crystals during measurements.]] | + | [[File:Placement_guides.png |thumb|left|350px| Placement guides used to fix crystals during measurements.]] |
| + | [[File:Compartmentsetup.png |thumb|left|350px| Compartment within Lambda 950.]] | ||
| + | |||
<p> </p> | <p> </p> | ||
Revision as of 12:41, 24 July 2016
PbWO4 Characterization and Recovery
Introduction
Methods
Light Transmittance
The light transmission of each crystal was measured using the Lambda 950 Spectrophotometer. The crystals were placed in the second compartment and a Labjack was installed and secured to place the crystal at the same height as the light beam. On the Labjack, fixed placement guides were put in place to ensure the constant crystal placement across all trials An iris with a diameter of 11.5 mm was also installed and secured in the same compartment to ensure the beam diameter was located within the crystal's dimensions. At machine startup and every five trails, the machine was aut-ozeroed to ensure accuracy of measurements. The spectrophotometer settings were as follows: _____
Transverse Transmission
Transverse transmission was measured with the beam firing through the middle of each 20 cm crystal. Paper was placed down to prevent scratches and the crystal was put in the placement guides. All crystals were unwrapped, cleaned with isopropanol, and marked with sharpie to indicate orientation of the crystals.
Longitudinal Transmission
To prepare the crystals for longitudinal transmission, each crystal was first wrapped in 3 layers of teflon tape and second 1 layer of electrical tape. To measure longitudinal transmittance, each crystal was placed in the corresponding placement guides.
Light Yield
The crystals were prepared for light yield measurements by placing one layer of electrical tape over three layers of teflon tape on one open face of the crystal.