Speaker
Description
The muon g-2/EDM experiment at J-PARC aims to measure muon's anomalous magnetic moment, g-2 with an precision of 0.1 ppm; and to search for electric dipole moment, EDM with a sensitivity of 10−21 e·cm.
In the experiment, tracks of decay positrons in a storage ring with a 3 T of uniform magnetic field are to be measured by a positron tracking detector. It consists of 48 rectangular platy parts called a vane, with a size of approximately 250 mm × 750 mm. They are aligned radially in the storage ring and form a cylindrical array with a diameter of approximately 600 mm and a height of 750 mm. In order to measure the track enough accurately, alignment accuracy for each vane was estimated to be better than 0.01 mrad around a normal line for each vane.
We consider adopting a fiber-introduced absolute distance meter based on interferometry using optical frequency comb for monitoring the alignment. Basic concept for detecting the alignment change and studies for installing the alignment monitoring system into our tracking detector are to be presented.
Summary
The muon g-2/EDM experiment at J-PARC aims to measure muon's anomalous magnetic moment, g-2 with an precision of 0.1 ppm; and to search for electric dipole moment, EDM with a sensitivity of 10−21 e·cm.
In the experiment, tracks of decay positrons in a storage ring with a 3 T of uniform magnetic field are to be measured by a positron tracking detector. It consists of 48 rectangular platy parts called a vane, with a size of approximately 250 mm × 750 mm. They are aligned radially in the storage ring and form a cylindrical array with a diameter of approximately 600 mm and a height of 750 mm. In order to measure the track enough accurately, alignment accuracy for each vane was estimated to be better than 0.01 mrad around a normal line for each vane.
We consider adopting a fiber-introduced absolute distance meter based on interferometry using optical frequency comb for monitoring the alignment. Basic concept for detecting the alignment change and studies for installing the alignment monitoring system into our tracking detector are to be presented.
