Structural design of the injection and extraction electrostatic septum of PREF

WEP58
17 Sept 2025, 17:00
1h
Poster Session Room (The Loop)

Poster Session Room

The Loop

Poster Presentation Magnets Wednesday Poster Session

Speaker

Yongxiang Pan (Institute of Modern Physics)

Description

Proton Radiation Effects Facility (PREF) is a dedicated accelerator generating 10-60 MeV proton beams for studying space radiation impacts on satellites and optoelectronics. To achieve a compact and cost-effective synchrotron (circumference of 18 m), an electrostatic septum system was developed, delivering uniform fields of 72 kV/cm (injection) and 135 kV/cm (extraction) at 350 mm and 730 mm installation spacing, respectively, in a 1×10⁻⁸ Pa·m³/s vacuum .The system enables ±15 mm adjustment range for both the anode and high-voltage cathode with accuracy within 0.1 mm, while the use of adaptive high-voltage feed-in method ensures stable electrical contact and eliminates mechanical stress during conditioning. Considering the mechanical properties and the bending constraints of the cutting plate, an array of 0.1mm arched tungsten wire ribbons arranged with small spacing were adapted for the structural design. Lab tests confirm the design's superior compliance with physical requirements, and two years of operation demonstrate the devices' high stability and long-term reliability.

Author

Yongxiang Pan (Institute of Modern Physics)

Co-authors

Yajun Zheng (Institute of Modern Physics) Yongbin Lang (Institute of Modern Physics) Lu Zhang (Institute of Modern Physics) Xiaowei Xu (Institute of Modern Physics) Haijiao Lu (Institute of Modern Physics) fengfeng wang (Institute of Modern Physics) Haihua Niu (Institute of Modern Physics) Bin Zhang (Institute of Modern Physics) Wenjun Chen (Institute of Modern Physics)

Presentation materials

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