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Updated: Jan 12, 2026

A Modeling and Simulation Method for Preliminary Design of an Electro-Variable Displacement Pump
Published on: June 1, 2022
Design of the front-end vacuum system and performance assessment of dry pumps
Shunming Liu1,2, Yigang Wang1,2, Pengcheng Wang1,2,3
1Spallation Neutron Source Science Center, Dongguan 523803, China.
Abstract:
This study presents a comprehensive vacuum system design framework for the ion source and low energy beam transport and Radio Frequency Quadrupole (RFQ) subsystems, aiming to establish fundamental design parameters for vacuum system layout based on the operational pressure requirements of the linear accelerator front-end system (ranging from the ion source to RFQ). Considering the critical aspect of hydrogen as the primary working gas in the ion source, a systematic evaluation of hydrogen pumping performance was conducted through standardized comparative testing of dry roughing pumps from multiple manufacturers. The experimental results provide quantitative selection criteria for roughing pump implementation in hydrogen-based ion source applications, offering practical design guidelines for similar accelerator configurations. Furthermore, the analysis results of ultimate pressure and residual gas composition at the pump inlet provide valuable reference data for achieving and maintaining clean vacuum conditions in the system.
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