CHESS Compact Wiggler construction report

TL;DR

This paper reports the development and testing of a compact, permanent magnet wiggler with a hydraulic gap control, demonstrating high magnetic field strength and innovative mechanical design for accelerator applications.

Contribution

The paper introduces a novel compact wiggler prototype with hydraulic gap control, combining mechanical and magnetic design innovations and providing detailed test results.

Findings

Achieved ~2.3 Tesla magnetic field at 6.5mm gap

Demonstrated hydraulic system effectively balances magnetic attraction forces

Provided detailed mechanical and magnetic design and construction insights

Abstract

We developed, built, characterized on bench and beam-tested a permanent magnet (PM) Compact Wiggler (CW) prototype with a hydraulic assist gap-controlling mechanism. The prototype is of ~50cm long, 20cm wide and 40cm high and weights ~50kg. Magnetic structure has a 76.2mm period. At 6.5mm minimal gap the structure demonstrated ~2.3 Tesla peak field. At this gap, the magnet arrays attract each other with 7,990 N (1,796 lbf) force. Hydraulic system is employed to balance the attractive forces. Here we describe the mechanical and magnetic design, present some construction details and provide test results.