Research School of Physics and Engineering, Australian National University, Canberra, Australian Capitol Territory, Australia
| Paper | Title | Page |
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| THM2C01 | Ultra High Impedance Diagnostics of Electrostatic Accelerators with Improved Resolution | 1 |
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| This contribution describes new technique to diagnose faults with high-voltage components in electrostatic accelerators. The main application of this technique is non-invasive testing of high-voltage grading systems; measuring insulation resistance or; determining the volume and surface resistivity of insulation materials used in column posts and acceleration tubes. In addition, it allows verification of the continuity of the resistive divider assembly as a complete circuit. A simple and practical fault finding data interpretation procedure has been established based on simple concepts. As a result of efficient in-situ troubleshooting and fault elimination techniques, the maximum values of |ΔR/R| are kept below 2.5% at the conclusion of maintenance procedures. The 2015 and beyond acceptance margin was reduced further to below 1% by increasing the test voltage from 40 V to 100 V. The experimental verification of improved resolution has been conducted during recent scheduled accelerator maintenance in May-June 2015 when few unique fault categories have been identified by the ultra-high impedance technique. | ||
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Slides THM2C01 [11.696 MB] | |