TL;DR
This paper reviews various long pulse modulator topologies used for high-voltage RF power in particle accelerators, discussing their design, operation, and future prospects.
Contribution
It provides a comprehensive overview of existing modulator topologies, explaining their principles, challenges, and potential advancements in the field.
Findings
Multiple modulator topologies are compared and analyzed.
The importance of energy storage charging methods is highlighted.
Future development directions are proposed.
Abstract
Long pulse modulators are used to produce high-voltage, high-power pulses with durations of several hundred microseconds up to some milliseconds. The loads are one or more klystrons for producing RF power to accelerate the particle beam in superconducting cavities. After years of development and improvements in different institutes a variety of topologies exist, and are presented. The basics of modulators, pulse requirements and klystrons are explained. Additionally, the charging of internal energy storage will be addressed. The outlook for future developments is given.
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