• DOI:10.1088/1748-0221/8/02/P02015
• Corpus ID: 119301490

A new application of emulsions to measure the gravitational force on antihydrogen

@article{Amsler2012ANA,
  title={A new application of emulsions to measure the gravitational force on antihydrogen},
  author={Claude Amsler and Akitaka Ariga and Tomoko Ariga and Saverio Braccini and Carlo Maria Canali and Antonio Ereditato and Jiro Kawada and Mitsuhiro Kimura and Igor E. Kreslo and Ciro Pistillo and Paola Scampoli and James William Storey},
  journal={Journal of Instrumentation},
  year={2012},
  volume={8},
  pages={02015}
}

• C. Amsler, A. Ariga, +9 authors J. Storey
• Published 6 November 2012
• Physics
• Journal of Instrumentation

We propose to build and operate a detector based on the emulsion film technology for the measurement of the gravitational acceleration on antimatter, to be performed by the AEgIS experiment (AD6) at CERN. The goal of AEgIS is to test the weak equivalence principle with a precision of 1% on the gravitational acceleration g by measuring the vertical position of the annihilation vertex of antihydrogen atoms after their free fall while moving horizontally in a vacuum pipe. With the emulsion technology developed at the University of Bern we propose to improve the performance of AEgIS by exploiting the superior position resolution of emulsion films over other particle detectors. The idea is to use a new type of emulsion films, especially developed for applications in vacuum, to yield a spatial resolution of the order of one micron in the measurement of the sag of the antihydrogen atoms in the gravitational field. This is an order of magnitude better than what was planned in the original AEgIS proposal.