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Argonne Laboratory Opening Switch - Early in 2003, DTI delivered a solid-state, 95 kV, 21 A opening series switch for the Advanced Light Source at Argonne National Laboratory. The switch replaces a mercury ignitron crowbar and is placed in series with the klystron cathode, opening when an arc is detected. Its operating time, including arc detection and switch opening, is under 700 ns, much faster than any known crowbar. The high voltage can be turned back on as soon as the arc clears, allowing beam operation to continue through a klystron arc.

The system includes a high speed, linear solid-state voltage regulator for controlling the klystron cathode - mod-anode voltage from the existing unregulated cathode supply, as well as filament supplies, and controls for the full range of klystron operation. Plans call for replacement of all five of the environmentally-hazardous mercury ignitrons in the system with solid state switches, and upgrades to the DC cathode power supplies. This fully solid state design is applicable to any pulsed or CW accelerator klystron.

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List of all articles in this sub-category Electrical power quality solutions

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