The design and construction of CSNS drift tube linac

Liu, Huachang; Peng, Jun; Gong, Keyun; Li, Ahong; Li, Bo; Chen, Qiang; Wu, Xianxin; Fan, Meigong; Wang, Yun; Qu, Peihua; Fu, Shinian

doi:10.1016/j.nima.2018.10.034

Cited by 10 publications

(1 citation statement)

References 4 publications

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“…To improve the measurement accuracy, the noise floor of the VNA was reduced by combining the averaging and the intermediate-frequency bandwidth; these two noise reduction features of the VNA are commonly used to address the measurement issue mentioned above [19]. However, the use of both features prolongs the measurement time, during which environmental parameters such as temperature and humidity might change, introducing errors to the measurements [20]. Therefore, preliminary tests were performed to determine an appropriate setting of the VNA at which both the noise floor power and the measurement time are acceptable.…”

Section: Fig 5 Photograph Of the Bead-pull Measurement Apparatusmentioning

confidence: 99%

Fabrication and cold test of prototype of spatially periodic radio frequency quadrupole focusing linac

Zhang

Wang

et al. 2021

NUCL SCI TECH

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A 325 MHz aluminum prototype of a spatially periodic rf quadrupole focusing linac was developed at the Institute of Modern Physics, Chinese Academy of Sciences, as a promising candidate for the front end of a high-current linac. It consists of an alternating series of crossbar H-type drift tubes and rf quadrupole sections. Owing to its special geometry, cavity fabrication is a major hurdle for its engineering development and application. In this paper, we report the detailed mechanical design of this structure and describe its fabrication process, including machining, assembly, and inspection. The field distribution was measured by the bead-pull technique. The results show that the field errors of both the accelerating and focusing fields are within an acceptable range. A tuning scheme for this new structure is proposed and verified. The cold test process and results are presented in detail. The development of this prototype provides valuable guidance for the application of the spatially periodic rf quadrupole structure.

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Section: Fig 5 Photograph Of the Bead-pull Measurement Apparatusmentioning

confidence: 99%