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Published byHubert Sanders Modified over 9 years ago
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What is CERN? International laboratory with strongest “microscope” in the world answering questions about: School laboratory microscope CERN’s “microscope”
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How we can build such a microscope? We need precision engineering! And a cooperation of thousands of scientists and engineers and most importantly:
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What is Precision? Relative term dependent on dimensions.
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Precision optics: Camera vs European extremely large telescope Rrelative precisions: 1µm/0.07m=1.4x10^-5 (camera) VS 15nm/39.8m = 3.76x10^-10 (camera vs telescope like 1km VS 1mm accuracy)
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Precision electronics: 1 st transistor (1947) vs nowadays transistors 1 transistor 1 transistor in 1947 more then 1 000 000 000 transistors (in one chip) The Philosophy of precision engineering: “The ultimate limit of precision in future will be of the size molecules/atom’s size’s (relativistic uncertainties/Brownian motions)
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Watchmakers connection to precision engineering examples from history: - Fuse - Balance wheel (dynamic balancing) F=k.x, F varies as x varies with spring unwinds.
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Element that gives precision example/mockups: Interchangeable manufacturing, tolerance for precision assembly Create 1 big (30,40cm Radius) clock plastic mechanism to be assembled by kids (right size part at right location to sucseed)
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Precision engineering in CLIC 8 5.56mm diameter 48.3 km straight line assembly of 2 linac’s “particle guns” shooting at each other Beams are ~10nm diameter equivalent Gun schematic courtesy of google CLIC artist impression courtesy of CERN CLIC artist impression beams colliding courtesy of CERN
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→Sources of troubles: - Operator ( bad usage) Design: - geometry - kinematic Environment →Temperature →Vibrations →pressure
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Examples of precision engineering World's Roundest Object (possibly new kg definition) If the earth has the same flatness -> highest mountain would be 14m high
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Examples of uses of precision engineering
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Beam alignment - mock-up with laser pointers
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Tolerances - mock-up with holes and pins
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