[Versa HD Volume-modulated Accelerator High Voltage Circuit Fault Maintenance]

Area of Science:

• Medical Physics
• Accelerator Technology
• Electrical Engineering

Background:

• Versa HD linear accelerators are crucial in radiation therapy.
• High voltage circuit faults can disrupt treatment delivery.
• Efficient fault diagnosis is essential for minimizing downtime.

Purpose of the Study:

• To introduce a fast repair method for Versa HD high voltage circuit faults.
• To present a key points test method for efficient troubleshooting.
• To reduce the time required for fault identification and repair.

Main Methods:

• Utilized a key points test method for fault diagnosis.
• Monitored AFC deviation in maintenance mode.
• Detected magnetron (MI) and PFN (PFN V) waveforms.
• Measured thyratron waveform and supply voltage.
• Verified HT PSU 600 V DC output.

Main Results:

• The key points test method effectively narrows down fault locations.
• Waveform and voltage measurements aid in rapid diagnosis.
• The method allows for quick identification and resolution of high voltage circuit faults.
• Successfully reduced diagnostic and repair times for Versa HD accelerators.

Conclusions:

• The introduced key points test method is effective for rapid Versa HD high voltage circuit fault repair.
• This diagnostic approach enhances the operational efficiency of linear accelerators.
• Implementing this method can significantly improve patient treatment continuity.