Precise Photographic Monitoring of MEG II Thin-film Muon Stopping Target Position and Shape

Abstract

We describe and show results of a photographic technique for continuously monitoring the position, orientation, and shape of a thin-film muon stopping target for the MEG II experiment. The measurement is complicated by the target being located in a region with 1.3 T magnetic field, significant radiation and having limited access. The technique achieves a measurement precision of 0.010 mm normal to and 0.030 mm parallel to the film surface, significantly better than required for the MEG II experiment.

References in corpus (2)

• The design of the MEG II experiment
• Search for the lepton-family-number nonconserving decay μ-> e + γ

Cited by in corpus (2)

• The Search for ${\mu }^{+}\to e^{+}\gamma$ with 10${}^{-14}$ Sensitivity: the Upgrade of the MEG Experiment
• A photogrammetric method for target monitoring inside the MEG II detector