Estimation of Excitation Coefficient by Floating Wire Technique for Reflection Magnet of EAST NBI

摘要

The principle of floating wire technique is introduced. Wire trace and current are measured through a dipole magnet through 180° in the horizontal plane. Measurements are made for testing the reflection magnet performance of neutral beam injector of experimental advanced superconducting tokamak. The magnetic field intensity is estimated by wire current, wire tension and radius of wire orbit. The excitation coefficient of the reflection magnet is about 1.07, which is in agreement with requirement of engineering design. Using the excitation coefficient, the operation guide data of reflection magnet is given with ion energy, I = 40.99E~(1/2).