Development of a movable standing wave resonant test system for fundamental power couplers with an extraordinary power gain

Lin, Zhiqiang; Jiang, Tiancai; Huang, Shijie; Xue, Zongheng; Zheng, Guojun; Wang, Ruoxu; Zeng, Fanjian; Shi, Liting; Li, Chunlong; Huang, Yongtao; Yang, Ziqin; Wu, Aoli; Zhang, Rongfeng; Li, Yongming; Xu, Mengxin; Zhang, Zhouli; He, Yuan

doi:10.1103/physrevaccelbeams.25.012001

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…5 In particle accelerator systems, especially those employing superconducting technology, cavities often experience standing wave states, unloaded, or complete reflections due to aging and beam mismatch, resulting in significant reflections. [6][7][8][9][10] In these conditions, directional couplers with insufficient directivity can lead to inaccurate power measurements, posing challenges for cavity physical analysis, monitoring of microwave power sources, and assessing the transmission line system's operational status. Several approaches, such as using a wiggly line, 11 additive lumped capacitances, 12 and inductor-loading methods, 13 have been proposed to improve the directivity of directional couplers.…”

Section: Introductionmentioning

confidence: 99%

“…However, nonideal directional couplers characterized by poor directivity can introduce measurement errors due to cross‐talk from the reverse signal 5 . In particle accelerator systems, especially those employing superconducting technology, cavities often experience standing wave states, unloaded, or complete reflections due to aging and beam mismatch, resulting in significant reflections 6–10 . In these conditions, directional couplers with insufficient directivity can lead to inaccurate power measurements, posing challenges for cavity physical analysis, monitoring of microwave power sources, and assessing the transmission line system's operational status.…”

Section: Introductionmentioning

confidence: 99%

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A method to enhance the accuracy of radio frequency power measurements in particle accelerator high‐frequency systems

Fanjian,

Liepeng,

Longbo

et al. 2024

Micro & Optical Tech Letters

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This letter presents a method for accurately calculating radio frequency (RF) power in a standing wave transmission line system. The proposed approach utilizes two directional couplers in conjunction with a low‐level radio frequency control system. RF power is determined through the application of proposed equations derived from amplitude and phase measurements of coupling signals obtained from the two directional couplers. Experimental validation of the method is conducted using two directional couplers with directivities of 26 and 28 dB, respectively, operating at 162.5 MHz across the entire wavelength. Results indicate that employing a single directional coupler yields average power errors of approximately 6.6% and 5.8%, respectively. However, by implementing the proposed method, the measurement error can be reduced to approximately 1.0%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A method to enhance the accuracy of radio frequency power measurements in particle accelerator high‐frequency systems

Fanjian,

Liepeng,

Longbo

et al. 2024

Micro & Optical Tech Letters

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show abstract

“…These For most of the time during the construction and operation of superconducting accelerators, the radio frequency (RF) transmission line system is in a state of large or even complete reflection [1,2]. When a fault occurs in the transmission line system [3,4], the increased reflection power caused by the fault point will be "drowned out" by the overall reflected signal.…”

Section: Introductionmentioning

confidence: 99%

A high-power RF transmission line status monitoring method based on sound recognition

zeng,

ma,

2023

Second International Conference on Electronic Information Technology (EIT 2023)

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To ensure the safe operation of a superconducting accelerator system, real-time monitoring of the RF power source, transmission lines, and superconducting cavities is essential. Currently, the main method for monitoring the status of transmission lines in superconducting accelerator systems is through monitoring the standing wave ratio. However, it is difficult to effectively monitor faults during high reflection or full reflection operations, which can pose significant safety risks. To address this issue, this paper proposes an online monitoring and positioning technique for RF transmission line faults based on acoustic fingerprinting. By studying the spectral characteristics and transmission mechanism of high-power RF transmission line faults, the sound recognition and classification experiment achieved a recognition accuracy of 98.0%, demonstrating the feasibility of this method in identifying faults in RF transmission lines.

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High power conditioning of RF couplers for the BISOL Linac

Yao

Zhu²,

Quan³

et al. 2023

Nuclear Instruments and Methods in Physics Research Section A:

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Development of a movable standing wave resonant test system for fundamental power couplers with an extraordinary power gain

Cited by 4 publications

References 8 publications

A method to enhance the accuracy of radio frequency power measurements in particle accelerator high‐frequency systems

A method to enhance the accuracy of radio frequency power measurements in particle accelerator high‐frequency systems

A high-power RF transmission line status monitoring method based on sound recognition

High power conditioning of RF couplers for the BISOL Linac

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