Room-temperature test system for 162.5 MHz high-power couplers

Chen, Long; Zhang, Shen-Hu; Li, Yongming; Wang, Ruoxu; Jiang, Tiancai; Yang, L.; Li, Chunlong; Wu, Aoli; Huang, Shijie; Pan, Feng; Liu, Xin-Meng; He, Yuan

doi:10.1007/s41365-018-0531-9

Cited by 8 publications

(7 citation statements)

References 13 publications

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“…The high RF power test system of the 1.3 GHz FPCs mainly includes four major subsystems: (1) power source system, (2) power transmission system, (3) test bench, and (4) low-level control system [19,20]. Figure 2 shows the composition block diagram of the high RF power test system for the 1.3 GHz FPCs.…”

Section: Composition Of Room Temperature Test System For 13 Ghz Fpcsmentioning

confidence: 99%

High RF power tests of the first 1.3 GHz fundamental power coupler prototypes for the SHINE project

Shen

Liu

et al. 2022

NUCL SCI TECH

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The Shanghai High Repetition Rate XFEL and Extreme Light Facility (SHINE) project will use 600 1.3 GHz fundamental power couplers, which are modified based on TTF-III power couplers, for continuous-wave operation with input power up to approximately 7 kW. The first batch of 20 sets of 1.3 GHz coupler prototypes was fabricated from three domestic manufacturers for the SHINE project. To better characterize the radio frequency conditioning phenomena for validating the performance of power couplers, a room temperature test stand was designed, constructed, and commissioned for the SHINE 1.3 GHz power couplers. In addition, a horizontal test cryostat was built to test the 1.3 GHz superconducting cavities, fundamental power couplers, tuners, and other components as a set. The results of these tests indicate that the 1.3 GHz couplers are capable of handling up to 14 kW continuous waves. Herein, the main aspects of the radio frequency design and construction of the test stand, along with the test results of the high-power conditioning of the 1.3 GHz couplers, are described.

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Section: Composition Of Room Temperature Test System For 13 Ghz Fpcsmentioning

confidence: 99%

High RF power tests of the first 1.3 GHz fundamental power coupler prototypes for the SHINE project

Shen

Liu

et al. 2022

NUCL SCI TECH

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“…Even if the fixed end and the tension end of the stretched wire are installed on a stable foundation, and the measurement is performed indoors without wind, the stretched wire will still sag under the combined effect of the hang tension and the wire's dead weight. Therefore, the calculus presented in previous studies [17][18][19][20] was used to derive an equation to calculate the vertical sag based on the catenary equation (only one fulcrum was fixed, whereas the other end was attached with a counterweight).…”

Section: Principle Overviewmentioning

confidence: 99%

“…, when the quadratic term is disregarded, 2 L x  in the three coordinate systems above, and the sag of the lowest point of the catenary equations (Equations (15)(16)(17)) can be obtained as follows [10][11][12][13][14][15][16][17][18][19][20][21]26] :…”

Section: Vertical Sag Requirementsmentioning

confidence: 99%

“…, where r is the wire radius (m);  is the wire unit volume mass(kg/m 3 ), i.e., the bulk density (kg/m 3 ). It is noteworthy some studies [25][26][27][28][29][30][31][32][33][34][35][36] stated that the molecular term in Equation (19) should not be multiplied by the acceleration of gravity g, whereas other studies [37][38][39] considered it necessary. In fact, the multiplication of the acceleration by gravity depends on the units of M in the denominator of Equation (19).…”

Section: Vertical Sag Requirementsmentioning

confidence: 99%

“…It is noteworthy some studies [25][26][27][28][29][30][31][32][33][34][35][36] stated that the molecular term in Equation (19) should not be multiplied by the acceleration of gravity g, whereas other studies [37][38][39] considered it necessary. In fact, the multiplication of the acceleration by gravity depends on the units of M in the denominator of Equation (19). If the units of M is Newton instead of kilogram, then the numerator should be multiplied by the acceleration of gravity.…”

Section: Vertical Sag Requirementsmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of factors affecting vertical sag of stretched wire

Yuan

Zhang

et al. 2021

NUCL SCI TECH

Self Cite

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To study vertical sag requirements and factors affecting the stretched wire alignment method, the vertical sag equation is first derived theoretically. Subsequently, the influencing factors (such as the hanging weight or tension, span length, temperature change, elastic deformation, and the Earth's rotation) of the vertical sag are summarized, and their validity is verified through actual measurements. Finally, the essential factors affecting vertical sag, i.e., the specific strength and length, are discussed. It is believed that the vertical sag of a stretched wire is proportional to the square of the length and inversely proportional to the specific strength of the material.

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Multi-port cavity model and low-level RF systems design for VHF gun

Liu

Wang

et al. 2020

NUCL SCI TECH

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Room-temperature test system for 162.5 MHz high-power couplers

Cited by 8 publications

References 13 publications

High RF power tests of the first 1.3 GHz fundamental power coupler prototypes for the SHINE project

High RF power tests of the first 1.3 GHz fundamental power coupler prototypes for the SHINE project

Investigation of factors affecting vertical sag of stretched wire

Multi-port cavity model and low-level RF systems design for VHF gun

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