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Measurements of Eljen Scintillator Thickness

Measurements of Eljen Scintillator Thickness. Edge measurements with a micrometer of the Eljen Scintillator Tiles. What are we trying to find out ?. Accuracy of Eljen’s claim of how thick scintillator tiles are. How much are they off?. Why is this a good idea?.

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Measurements of Eljen Scintillator Thickness

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  1. Measurements of Eljen Scintillator Thickness Edge measurements with a micrometer of the Eljen Scintillator Tiles

  2. What are we trying to find out ? • Accuracy of Eljen’s claim of how thick scintillator tiles are. • How much are they off?

  3. Why is this a good idea? • To check the uniformity of the scintillator tiles • Make sure we get what we paid/asked for

  4. The process Measurements were taken with and without the protective paper on the tiles A comparison was made between these results Measurements were recorded around all four edges of two scintillator tiles The data is recorded by side of scintillator

  5. Results of Measurements With/Without PaperA .15mm difference was found

  6. What does this show? • There is a .15mm layer of paper and adhesive adding to the thickness of the scintillator • This can be subtracted from the measurements with the paper still on the scintillator. • The scintillator’s surface can remain protected by the paper

  7. Preliminary Results • The following graphs show edge measurements of thickness • These graphs have .15mm subtracted from their meaured results to account for the thickness of the protective paper, on average

  8. Lot # 042203B12

  9. Lot #021103A05

  10. What we have found • Scintillator tile edge measurements show deviations of 10% or more. • Do these measurements fall within the proposed tolerances?

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