IPAC'23 - 14th International Particle Accelerator Conference

Pulsed wire magnetic field measurements for an in-vacuum undulator

MOPM111

8 May 2023, 16:30

2h

Sala Mosaici 2

Poster Presentation MC2.T15: Undulators and Wigglers Monday Poster Session

Speakers

Chih-Wei Chen (National Synchrotron Radiation Research Center) Jui-Che Huang (National Synchrotron Radiation Research Center)

Description

An in-vacuum undulator is important for synchrotron radiation. An in-vacuum undulator with a permanent-magnet is used by the Taiwan Photon Source (TPS) in the National Synchrotron Radiation Research Center (NSRRC). Before installation in the storage ring, the magnetic field of the undulator is measured at the oper-ational gaps. The magnetic-field for an in-vacuum un-dulator is measured using a Hall-probe and a stretched-wire measurement system. This study uses a pulsed wire magnetic field measurement system for an in-vacuum undulator. A reference magnet with a known magnetic field is used to determine the magnetic field profile for an in-vacuum undulator and it is demonstrat-ed that the oil dampers crucial to eliminating dispersion waves for the pulsed wire measurement. The results are used to compare the magnetic field measurements that use a pulsed wire with those that use a Hall probe.