MiniVac Controller

Importance of the topic

Ion pump controllers are essential for ultra high vacuum systems in research and industrial applications. They supply stable high voltage and monitor current to ion pumps, ensuring reliable vacuum performance.

Goals and Overview

This manual provides guidelines for installing, operating and maintaining the MiniVac series high voltage controllers compatible with various ion pumps. It covers safety protocols, environmental requirements, panel controls, interlock usage and troubleshooting procedures.

Methodology and Instrumentation

The MiniVac is a solid-state quarter rack power supply with 24 V DC input and ±5 kV output, current-limited to 15 mA. It uses high-frequency switching technology, features a bar-graph LED display for voltage/current, remote on/off via interlock, dual recorder outputs and EMC filtering. Two HV connector options (FISCHER or KINGS) support different pump types.

Used Instrumentation

• MiniVac Controller model 929-0196 with FISCHER HV connector
• MiniVac Controller model 929-0197 with KINGS HV connector
• High-voltage bakeable and standard cables for 8 l/s to 400 l/s pumps
• Accessory 9-pin D connector for recorder outputs and interlock

Main Results and Discussion

The controller efficiently powers pumps from 8 l/s to 400 l/s across pressure ranges from 1 × 10⁻³ to 2 × 10⁻⁶ mbar. It withstands continuous short-circuit conditions and auto-restarts after power failures. LED indicators and recorder outputs allow precise real-time monitoring of pump current and applied voltage.

Benefits and Practical Use

• Compact quarter-rack design with free-air cooling
• Clear front-panel LED status and analog recorder outputs
• Safety interlock to prevent accidental exposure to high voltage
• No routine maintenance required; faults handled by exchange service
• Flexible remote control for integration into automated systems

Future Trends and Possibilities

Next-generation controllers will likely integrate digital interfaces, network connectivity and advanced diagnostics for predictive maintenance. Further miniaturization and efficiency improvements in solid-state HV generation may reduce system footprint and improve reliability.

Conclusion

The MiniVac series offers a reliable, user-friendly high-voltage solution for ion pumps, combining compact form factor, robust safety features and self-protective design, suited to a wide range of vacuum applications.

References

• EEC Directive 85/399 on recyclable packaging