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A continuous-wave superconducting linear accelerator scheme for the drive beam acceleration of the Compact Linear Collider
/ Liu, Jiayang (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI ; CERN) ; Grudiev, Alexej (CERN) ; Zha, Hao (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI ; CERN) ; Shi, Jiaru (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Chen, Huaibi (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI)
The Compact Linear Collider (CLIC) utilizes two 2.5-km-long normal-conducting linear accelerators (LINACs) to produce a drive beam with 140μs pulse length at a repetition rate of 50 Hz. This setup is relatively expensive in the early stages due to both the length of the drive beam LINACs and the amount of the power sources for one drive beam complex are the same in all energy stages. [...]
2021 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1006 (2021) 165328
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2.
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Analytic RF design of a linear accelerator with a SLED-I type RF pulse compressor
/ Liu, Jia-Yang (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing) ; Shi, Jia-Ru (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing) ; Zha, Hao ; Grudiev, Alexej (CERN) ; Wang, Ping (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing) ; Du, Ying-Chao (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing) ; Chen, Huai-Bi (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing)
This study presents the RF design of a linear accelerator (linac) operated in single-bunch mode. The accelerator is powered by a compressed RF pulse produced from a SLED-I type RF pulse compressor. [...]
2020 - 11 p.
- Published in : Nucl. Sci. Tech. 31 (2020) 107
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3.
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Tolerance study of travelling-wave accelerating structure for the main linac of the klystron-based first stage of Compact Linear Collider
/ Liu, Jiayang (Tsinghua U., Beijing ; Tsinghua U., Beijing ; CERN) ; Shi, Jiaru (Tsinghua U., Beijing ; Tsinghua U., Beijing) ; Grudiev, Alexej (CERN) ; Zha, Hao (Tsinghua U., Beijing ; Tsinghua U., Beijing) ; Chen, Huaibi (Tsinghua U., Beijing ; Tsinghua U., Beijing)
This work aims to analyse the tolerances given by two effects on the performance of the travelling-wave accelerating structure: the reflection along the structure and the change in the nominal accelerating voltage, which is essential for the projects with a large number of accelerating structures. The detuning and dephasing caused by systematic temperature shifts, systematic geometric errors and random geometric errors has been investigated in this paper. [...]
2020 - 7 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 981 (2020) 164499
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4.
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Analysis and simulation of the "after-pulse" RF breakdown
/ Lin, Xiancai (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Chen, Huaibi (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Liu, Zening (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Shi, Jiaru (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Wu, Xiaowei (CERN) ; Zha, Hao (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI)
During the high power experiment of a single-cell standing-wave accelerating structure, it was observed that many RF breakdowns happen when the field inside cavity is decaying after the input rf pulse is off. The distribution of breakdown timing shows a peak at the moment of RF power switches off. [...]
CERN-ACC-2019-133.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-MOPGW047
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.MOPGW047
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5.
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Wakefield suppression in the main linac of the klystron-based first stage of CLIC at 380 GeV
/ Liu, Jiayang (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Chen, Huaibi (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Grudiev, Alexej (CERN) ; Shi, Jiaru (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Zha, Hao (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI)
An alternative klystron-based scenario for the first stage of Compact Linear Collider (CLIC) at 380 GeV centre-of-mass energy was proposed. To preserve the beam stability and luminosity of CLIC, the beam-induced transverse long-range wakefield in main linac must be suppressed to an acceptable value. [...]
CERN-ACC-2019-213; CLIC-Note-1188.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPRB043
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPRB043
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6.
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Demonstration of a cavity-based pulse compression system for pulse shape correction
/ Jiang, Yuliang (Tsinghua U., Beijing) ; Zha, Hao (Tsinghua U., Beijing) ; Wang, Ping (Tsinghua U., Beijing) ; Shi, Jiaru (Tsinghua U., Beijing) ; Chen, Huaibi (Tsinghua U., Beijing) ; Millar, William L (CERN ; Cockcroft Inst. Accel. Sci. Tech.) ; Syratchev, Igor (CERN)
A compact X-band correction cavity chain (CC) has been successfully designed, fabricated and high power tested for the Compact Linear Collider (CLIC) project. The CC consists of eight spherical cavities and four polarizers, and each spherical cavity has a $Q_0$ of 45 000 and a diameter of 7 cm. [...]
2019 - 6 p.
- Published in : Phys. Rev. Accel. Beams 22 (2019) 082001
External link: Fulltext
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7.
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Fabrication and Cold Test of the Correction Cavity Chain for Klystron-Based CLIC
/ Wang, Ping (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Cao, Dezhi (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Chen, Huaibi (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Shi, Jiaru (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Wang, Zhihui (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Zha, Hao (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI)
A proposed RF scheme based on correction cavity chain and storage cavity (CC-SC scheme) for klystron-based CLIC has the ability to generate flat output pulses. In the scheme, the correction cavity chain modulates the amplitude of the input pulse, while the storage cavity compresses the amplitude-modulated pulse. [...]
2018 - 3 p.
- Published in : 10.18429/JACoW-IPAC2018-THPAL155
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAL155
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8.
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Building a 12GHz Traveling Wave Accelerating Structure Brazed Through Irises
/ Dolgashev, Valery (SLAC) ; Bowden, Gordon (SLAC) ; Dal Forno, Massimo (SLAC) ; Grudiev, Alexej (CERN) ; Haase, Andrew (SLAC) ; Zha, Hao (Tsinghua U., Beijing)
Accelerating structures are usually manufactured by precision turning of individual cells combined with precision milling for complex parts such as rf power couplers. These multiple parts are staked and brazed into a complete structure. [...]
CERN-ACC-2018-195; CLIC-Note-1156.-
2018 - 4 p.
- Published in : 10.18429/JACoW-LINAC2018-THPO018
Fulltext: PDF;
In : 29th International Linear Accelerator Conference, Beijing, China, 16 - 21 Sep 2018, pp.THPO018
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9.
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Design, fabrication, and high-gradient testing of an $X$-band, traveling-wave accelerating structure milled from copper halves
/ Argyropoulos, Theodoros (CERN) ; Catalan-Lasheras, Nuria (CERN) ; Grudiev, Alexej (CERN) ; Mcmonagle, Gerard (CERN) ; Rodriguez-Castro, Enrique (CERN) ; Syrachev, Igor (CERN) ; Wegner, Rolf (CERN) ; Woolley, Ben (CERN) ; Wuensch, Walter (CERN) ; Zha, Hao (CERN) et al.
A prototype 11.994 GHz, traveling-wave accelerating structure for the Compact Linear Collider has been built, using the novel technique of assembling the structure from milled halves. The use of milled halves has many advantages when compared to a structure made from individual disks. [...]
2018 - 11 p.
- Published in : Phys. Rev. Accel. Beams 21 (2018) 061001
Fulltext: PDF;
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10.
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Fabrication and high-gradient testing of an accelerating structure made from milled halves
/ Wuensch, Walter (CERN) ; Argyropoulos, Theodoros (CERN ; Valencia U., IFIC) ; Bowden, Gordon (SLAC) ; Catalán Lasheras, Nuria (CERN) ; Dolgashev, Valery (SLAC) ; Esperante Pereira, Daniel (Valencia U., IFIC ; CERN) ; Giansiracusa, Paul (Melbourne U.) ; Giner Navarro, Jorge (CERN ; Valencia U., IFIC) ; Grudiev, Alexej (CERN) ; Haase, Andrew (SLAC) et al.
Accelerating structures made from parts which follow symmetry planes offer many potential advantages over traditional disk-based structures: more options for joining (from bonding to welding), following this more options for material state (heat treated or not) and potentially lower cost since structures can be made from fewer parts. An X-band structure made from milled halves, and with a standard benchmarked CLIC test structure design has been fabricated and high-gradient tested above 95 MV/m..
CERN-ACC-2017-346.-
2017 - 4 p.
- Published in : 10.18429/JACoW-LINAC2016-THPLR003
Fulltext: PDF;
In : 28th Linear Accelerator Conference, East Lansing, Michigan, 25 - 30 Sep 2016, pp.THPLR003
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