Measuring the gravitational acceleration of antimatter with an antihydrogen interferometer |
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Authors: | Thomas J Phillips |
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Institution: | (1) Physics Department, Duke University, 27708-0305 Durham, NC, USA |
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Abstract: | The gravitational force on antimatter has never been directly measured. A method is suggested for making this measurement by directing a low-energy beam of neutral antihydrogen atoms through a transmission-grating interferometer and measuring the gravitationally-induced phase shift in the interference pattern. A 1% measurement of the acceleration due to the Earth's gravitational field (¯ g) should be possible from a beam of about 105 or 106 atoms. If more antihydrogen can be made, a much more precise measurement of¯ g would be possible. A method is suggested for producing an antihydrogen beam appropriate for this experiment. |
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