| Purpose: To evaluate the attenuation of copper with thickness in order to have knowledge of how much signal we would expect to see through the structure with the receiving sensor. Using 20MHz and 15MHz ValpeyFisher sensors we have run the attenuation test with varying thickness of copper. They are as follows: 0.0inch, 0.025inch, 0.061inch, 0.081inch, .382inch, and 2.01inch. In our tests we have used three different frequency ranges: 100KHz - 20MHz, 4MHz - 10MHz, and 10MHz - 30MHz. These ranges have allowed us to focus on areas of interest. |
| Figure 1 | ValpeyFisher 20MHz sensor specs |
| Figure 2 | ValpeyFisher 15MHz sensor specs |
| Figure 3 | Diagram of setup |
| Figure 4 | Data files |
| Chart 1 | Copper attenuation in copper thicknesses (0 inch, 0.025 inch, 0.061 inch,0.081 inch, 0.127 inch, 0.382 inch, 2.01inch) over a frequency range of 100KHz to 20MHz |
| Chart 2 | Copper attenuation in 0.0 inch copper thicknesses over a frequency range of 100KHz to 20MHz |
| Chart 3 | Copper attenuation in copper thicknesses of 0.025 inch over a frequency range of 100KHz to 20MHz |
| Chart 4 | Copper attenuation in copper thickness of 0.061 inch over a frequency range of 100KHz to 20MHz |
| Chart 5 | Copper attenuation in copper thickness of 0.081 inch over a frequency range of 100KHz to 20MHz |
| Chart 6 | Copper attenuation in copper thickness 0.127 inch over a frequency range of 100KHz to 20MHz |
| Chart 7 | Copper attenuation in copper thickness 0.382 inch over a frequency range of 100KHz to 20MHz |
| Chart 8 | Copper attenuation in copper thickness 2.01 inch over a frequency range of 100KHz to 20MHz |
| Chart 9 | Copper attenuation in copper thicknesses (0 inch, 0.025 inch, 0.061 inch,0.081 inch, 0.127 inch, 0.382 inch, 2.01inch) over a frequency range of 4MHz to 10MHz |
| Chart 10 | Copper attenuation in copper thicknesses (0 inch, 0.025 inch, 0.061 inch,0.081 inch, 0.127 inch, 0.382 inch, 2.01inch) over a frequency range of 10MHz to 30MHz |
| Notes from Fritz Caspers | |
| Note1 | IEEE Microwave magazine Vol 3 No 2 June 2002 |
| Note 2 | ULTRASONIC INSPECTION of COPPER CANISTERS USING PHASE ARRAYS |
| Note 3 | Introduction to Contact-Free Ultrasonic Characterization and Analysis of Consol |
| Note 4 | Design of a test system to characterize very high frequency Ultrasound Transducer arrays |
| Note 5 | Introduction to Contact-Free Ultrasonic Characterization and Analysis of Consolidated Materials |
| Note 6 | Application Online Workshop - Quiz List UT 1-2-3 |
| Note 7 | Ultrasonic velocity and attenuation of nano-scaled copper measured by laser ultrasonic technique |
| Note 8 | Acoustic Phonons in Pulsed very High Gradient Cavities to Lower Peak Surface Heating?, F. Caspers, Oct 15-20, 2000 |
| Note 9 | IEEE-Transactions on Instrumentation And Measurement Vol 51 No 2, April 2002 page 268-275 |
| Other Notes | |
| Note 10 | Fabrication of High Frequency (25-75 MHz) Single Element Ultrasonic Transducer |
| Meeting
Schedule | Web
Comments & Suggestions | SLAC
This page was created by K.
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June 21, 2002
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