Abstract
This chapter presents new solutions, which use multiple shorter and independent cavities, for the realization of future long RFQ accelerators. From the RF point of view, the use of shorter cavities has many advantages, e.g., the longitudinal field stability can be improved, the RF tuning can be simplified, and a large power amplifier that usually needs to be customized can be replaced by several small ones already available on the market. However, the beam matching between cavities can become an issue, especially at high current and low energies, because the RFQ has rather small electrode apertures and its focusing system always varies with time. Benefiting from the new design approaches introduced in Chap. 2 and some other special ideas, two efficient multi-cavity RFQ accelerators have been designed:
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One > 9-m-long MEGLET-style RFQ accelerator based on the IH structure for 20 emA uranium ions.
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One > 6-m-long SEGLER-style RFQ accelerator based on the 4-rod structure for 105 emA protons.
This kind of multi-cavity RFQ accelerators can also be used for the experimental demonstration of MEGLET- or SEGLER-style emittance transfers.
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Zhang, C. (2023). Towards Efficient Long RFQ Accelerators. In: Radio-Frequency Quadrupole Accelerators. Particle Acceleration and Detection. Springer, Cham. https://doi.org/10.1007/978-3-031-40967-7_5
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DOI: https://doi.org/10.1007/978-3-031-40967-7_5
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