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| lecture:210407_oval [2021/04/07 06:55] – created Ce Zhang | lecture:210407_oval [2021/04/07 08:03] (current) – Ce Zhang | ||
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| with a high repetitive pulsed magnet and a high finesse optical cavity. In this talk, I | with a high repetitive pulsed magnet and a high finesse optical cavity. In this talk, I | ||
| would like to show the latest result of the OVAL experiment. | would like to show the latest result of the OVAL experiment. | ||
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| + | Probing the structure of the vacuum with light source: a good probe for the structure of the vacuum | ||
| + | 1.low e collider | ||
| + | 2.selectively excitation spin 0 | ||
| + | 3. high precesion | ||
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| + | VMB: anisotropy of the refractive index of the vac in the B field | ||
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| + | candidate: virtual e-positron pair in vac | ||
| + | contribution from axion, couples to 2 photons | ||
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| + | Motivation: | ||
| + | 1. VMB by QED | ||
| + | 2. new phy | ||
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| + | fabry-perot cavity | ||
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| + | setup | ||
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| + | history of VMB search | ||
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| + | PVLAS | ||
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| + | one order worse than the over of the QED effect | ||
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| + | - weak B | ||
| + | - unexpecte biref noise in low freq | ||
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| + | pulsed mag for VMB search | ||
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| + | key point 1 : pulse mag | ||
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| + | 1064 nm CW | ||
| + | --> reflectivity of the mirrors | ||
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