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X-Band Amplifier for the PAL-XFEL

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Abstract

Recent X-ray free electron lasers based on a high-energy high-current linear accelerator, such as the Pohang Accelerator Laboratory (PAL-XFEL) uses a third harmonic radio-frequency (RF) linearizer system to improve the laser's longitudinal beam quality. Because the X-ray free electron laser at the PAL-Xfel uses 2856 MHz RF accelerators, we realized a RF linearizer of 11.424 GHz which afforded a 50 MW RF power by using a SLAC X-band klystron. Operation of the X-band klystron required an X-band amplifier with a 1 kW level at the specified frequency of 11.424 GHz. We tested two types of X-band amplifier, a traveling wave tube amplifier and a solid state amplifier. In this work, we present the test results and discuss the features, especially focusing on the X-band solid state amplifier.

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Acknowledgments

The authors acknowledge the support of the Ministry of Science and ICT of Korea.

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Authors and Affiliations

  1. Pohang Accelerator Laboratory, Pohang, 37673, Korea

    Hoon Heo, Jin-Yul Hu, Heung-Soo Lee & Heung-Sik Kang

  2. Rfpt Co. Ltd., Anyang, 14057, Korea

    Su Hyun Lee, Jin Ho Chang & Dong Heon Lee

Authors
  1. Hoon Heo
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  2. Jin-Yul Hu
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  3. Heung-Soo Lee
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  4. Heung-Sik Kang
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  5. Su Hyun Lee
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  6. Jin Ho Chang
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  7. Dong Heon Lee
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Corresponding author

Correspondence to Hoon Heo.

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Heo, H., Hu, JY., Lee, HS. et al. X-Band Amplifier for the PAL-XFEL. J. Korean Phys. Soc. 76, 573–576 (2020). https://doi.org/10.3938/jkps.76.573

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  • DOI: https://doi.org/10.3938/jkps.76.573

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