Development of the pulsed magnetic kicker for the spiral injection test experiment

A new muon g – 2 / EDM experiment at J-PARC (E34) is under preparation in order to resolve a 3 sigma discrepancy of muon anomalous magnetic dipole moment between the measurement and the standard model prediction. The E34 experiment will employ a unique three-dimensional spiral injection scheme in order to store the muon beam into a small storage orbit. In order to demonstrate the feasibility of novel injection scheme, the Spiral Injection Test Experiment (SITE) with the electron beam is under construction at KEK Tsukuba campus. In SITE, 80 keV DC electron beam was injected at forty degrees into the storage magnet and detected as a fluorescent light due to the deexcitation of the nitrogen gas. The pulsed electron beam, and a pulsed magnetic kicker are developed in order to keep the pulsed beam to the very center of the storage magnet. The magnetic kicker mainly produced the radial field to reduce the pitch angle of the injected beam to keep the beam at storage region. In this paper, the development of magnetic kicker, tracking studies in kicker field and two designs for the SITE's kicker is presented. (author)