Performance optimization of the CLIC positron source
The baseline configuration of the Compact Linear Collider positron source is optimized at three different collision energy stages for both drive beam-based and klystron-based acceleration modes. The hybrid target is replaced with a single amorphous tungsten target with the target thickness and elect...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2025-01-01
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| Series: | Physical Review Accelerators and Beams |
| Online Access: | http://doi.org/10.1103/PhysRevAccelBeams.28.011002 |
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| Summary: | The baseline configuration of the Compact Linear Collider positron source is optimized at three different collision energy stages for both drive beam-based and klystron-based acceleration modes. The hybrid target is replaced with a single amorphous tungsten target with the target thickness and electron beam spot size optimized. As a result of the optimization, compared with the old baseline configuration, the positron yield has been improved by a factor of 1.65, enabling the same reduction in the bunch charge and beam power of the primary electron beam. The total deposited power in the target is reduced by a factor of 2.1. The most realistic start-to-end simulation to date of the system from the target to the injector linac is performed taking into account new design of essential hardware. The impact of misalignments is studied for the first time and is found to be small and acceptable. Possibility for reducing the primary electron beam energy is investigated. With a bunch charge below 1 nC, it is possible to reduce the energy from 5 GeV to a minimum of 2.3 GeV with the linac length and costs reduced accordingly. The deposited power in the target is also reduced with the energy. |
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| ISSN: | 2469-9888 |