Numerical analysis and design of collinear load for S-band linac based on FeSiAl material

Sun, Yongjun; Shen, Lianguan; Wang, Xiucui; Zhao, Shihua; Pei, Yanxi

doi:10.1016/j.nima.2010.08.086

Cited by 7 publications

(2 citation statements)

References 7 publications

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“…More detailed report of the lossy material can be found in Ref. [25]. Table I lists some key characteristic parameters of the normal cells and the load cells as a comparison.…”

Section: Traveling Waving Linac With Collinear Load Cellsmentioning

confidence: 99%

rf conditioning and breakdown analysis of a traveling wave linac with collinear load cells

Chen

Qin

et al. 2018

Phys. Rev. Accel. Beams

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and Technology (HUST) has built a compact linac-based terahertz free electron laser (THz-FEL) prototype. In order to achieve compact structure, the linac uses collinear load cells instead of conventional output coupler to absorb remanent power at the end of linac. The new designed structure is confronted with rf breakdown problem after a long time conditioning process, so we tried to figure out the breakdown site in the linac. Without transmitted signal, we propose two methods to analyze the breakdown site mainly based on the forward and the reflected power signals. One method focuses on the time relationship of the two signals while the other focuses on the amplitude. Both the two methods indicate the breakdown events happened at the end of the linac and more likely in the first or the second load cell.

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“…More detailed report of the lossy material can be found in Ref. [25]. Table I lists some key characteristic parameters of the normal cells and the load cells as a comparison.…”

Section: Traveling Waving Linac With Collinear Load Cellsmentioning

confidence: 99%

rf conditioning and breakdown analysis of a traveling wave linac with collinear load cells

Chen

Qin

et al. 2018

Phys. Rev. Accel. Beams

Self Cite

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“…FeSiAl alloy (85%Fe-9.6%Si-5.4%Al), also named sendust alloy, is widely used as microwave-absorbing material because of its high saturation flux density, low coercive force and high electrical resistivity [9]. An optimized power-loss allocation based on Dittus-Boelter correlation and Newton's law of cooling is proposed by Z.Shu [2].…”

Section: Frequency Calculation Of Collinear Loadmentioning

confidence: 99%

Optimization of Cooling System of Linac Collinear Load

Shen

Zhao

et al. 2011

AMR

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Collinear load, coating with microwave-absorbing material, determined to linear accelerator (LINAC) to absorb the remnant power. It forms a part of actual accelerating structure and substitutes for traditional waveguide-type load to make the accelerating structure compacter and size smaller. In order to guarantee operational reliability, it is necessary to keep the operation frequency of cavities of the collinear load at 2856MHz and at a small shift. An approach utilized to accurately evaluate the frequency change caused by non-uniform thermal deformation is presented and a strategy for optimizing its cooling system is also described simultaneously. A six-cavity collinear load, coated with FeSiAl alloy, is researched. The results show that the frequency shift of cavities of the collinear load can be controlled within -56~35kHz, when it runs on 2856MHz and 2π/3 mode and the structure of its cooling system becomes much more compact and economic.

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Design of RF chopper system for improving beam quality in FEL injector with thermionic gun

Chen

Qin

Tan

et al. 2014

Nuclear Instruments and Methods in Physics Research Section A:

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Numerical analysis and design of collinear load for S-band linac based on FeSiAl material

Cited by 7 publications

References 7 publications

rf conditioning and breakdown analysis of a traveling wave linac with collinear load cells

rf conditioning and breakdown analysis of a traveling wave linac with collinear load cells

Optimization of Cooling System of Linac Collinear Load

Design of RF chopper system for improving beam quality in FEL injector with thermionic gun

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