1.
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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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2.
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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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3.
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High Power Test of X-band Single Cell HOM-free Choke-mode Damped Accelerating Structure made by Tsinghua University
/ Wu, Xiaowei (Tsinghua U., Beijing, KLPRI ; Tsinghua U., Beijing, Dept. Eng. Phys.) ; Abe, Tetsuo (KEK, Tsukuba) ; Chen, Huaibi (Tsinghua U., Beijing, KLPRI ; Tsinghua U., Beijing, Dept. Eng. Phys.) ; Higo, Toshiyasu (KEK, Tsukuba) ; Shi, Jiaru (Tsinghua U., Beijing, KLPRI ; Tsinghua U., Beijing, Dept. Eng. Phys.) ; Wuensch, Walter (CERN) ; Zha, Hao (Tsinghua U., Beijing, KLPRI ; Tsinghua U., Beijing, Dept. Eng. Phys.)
As an alternative design for CLIC main accelerating structures, X-band choke-mode damped structures had been studied for several years. However, the performance of choke-mode cavity under high power is still in lack of research. [...]
CERN-ACC-2016-129; CLIC-Note-1105.-
2016 - 3 p.
- Published in : 10.18429/JACoW-IPAC2016-THPOR043
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPOR043
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4.
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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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5.
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Calorimetric Power Measurements in X-band High Power RF
/ Wu, Xiaowei (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Catalán Lasheras, Nuria (CERN) ; Chen, Huaibi (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI) ; Woolley, Benjamin (CERN) ; Wuensch, Walter (CERN) ; Zhang, Liang (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI)
With the aim to test prototype accelerating structures for CLIC at high-gradient, new klystron-based, X-band high power test stands are being built at CERN. These tests stands are referred to as Xboxes with Xbox1 and Xbox2 being already operational. [...]
CERN-ACC-2015-223.-
2015 - 3 p.
- Published in : (2015) , pp. WEPMN019
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.WEPMN019
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6.
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The RF Design of a Compact, High Power Pulse Compressor with a Flat Output Pulse
/ Wang, Ping (Tsinghua U., Beijing, Dept. Eng. Phys. ; Tsinghua U., Beijing, KLPRI ; CERN) ; Chen, Huaibi (Tsinghua U., Beijing ; Tsinghua U., Beijing, KLPRI) ; Shi, Jiaru (Tsinghua U., Beijing ; Tsinghua U., Beijing, KLPRI) ; Syratchev, Igor (CERN) ; Wuensch, Walter (CERN) ; Zha, Hao (CERN)
An X-band, high-power pulse compressor, which can produce a flat pulse and a power gain of 4.3, has been designed. The device is compact, with the dimensions of within 1m, and is designed for CLIC first energy stage based on klystrons. [...]
CERN-ACC-2016-167; CLIC-Note-1084.-
2016 - 3 p.
- Published in : 10.18429/JACoW-IPAC2016-THPMW022
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPMW022
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7.
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New Quantity Describing the Pulse Shape Dependence of the High Gradient Limit in Single Cell Standing-Wave Accelerating Structures
/ Shi, Jiaru (Tsinghua U., Beijing ; Tsinghua U., Beijing, KLPRI) ; Chen, Huaibi (Tsinghua U., Beijing ; Tsinghua U., Beijing, KLPRI) ; Dolgashev, Valery (SLAC) ; Grudiev, Alexej (CERN) ; Higashi, Yasuo (KEK, Tsukuba) ; Spataro, Bruno (Frascati) ; Wu, Xiaowei (Tsinghua U., Beijing ; Tsinghua U., Beijing, KLPRI) ; Wuensch, Walter (CERN)
A new quantity has been developed to study the relationship among the breakdown rate, the pulse width and the gradient. Difference pulse shapes can be treated by introducing a Green's function. [...]
CERN-ACC-2016-130.-
2016 - 3 p.
- Published in : 10.18429/JACoW-IPAC2016-THPOR042
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPOR042
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8.
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Commissioning Status of the 3 MeV RFQ for the Compact Pulsed Hadron Source (CPHS) at Tsinghua University
/ Xing, QZ (Tsinghua U., Beijing, KLPRI) ; Young, LM (TechSource, Santa Fe) ; Stovall, J (CERN) ; He, Y (Tsinghua U., Beijing) ; Guan, WQ (Tsinghua U., Beijing) ; Du, L (Tsinghua U., Beijing, KLPRI) ; Cheng, C (Tsinghua U., Beijing, KLPRI) ; Cai, JC (Tsinghua U., Beijing, KLPRI) ; Bin, DT (Tsinghua U., Beijing) ; Bai, YJ (Tsinghua U., Beijing, Dept. Eng. Phys.) et al.
The 3 MeV Radio Frequency Quadrupole (RFQ) accelerator for the Compact Pulsed Hadron Source (CPHS) is in its initial stage for the commissioning at Tsinghua University. Braze of the flanges was completed in January, 2012. [...]
2012 - 3 p.
- Published in : Conf. Proc.: C1205201 (2012) , pp. THPPC014
External link: Published version from JaCoW
In : 3rd International Particle Accelerator Conference, New Orleans, LA, USA, 20 - 25 May 2012, pp.3305-3307
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9.
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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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10.
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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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