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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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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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Beam-Based Measurements of Long Range Transverse Wakefields in CLIC Main Linac Accelerating Structure
/ Zha, Hao (CERN) ; Adli, Erik (Oslo U.) ; De Michele, Giovanni (EPFL-ISIC, Lausanne ; PSI, Villigen) ; Grudiev, Alexej (CERN) ; Latina, Andrea (CERN) ; Lipkowitz, Nate (SLAC) ; Schulte, Daniel (CERN) ; Solodko, Anastasiya (CERN) ; Wuensch, Walter (CERN) ; Yocky, Gerald (SLAC)
The baseline design of CLIC (Compact Linear Collider) uses X-band accelerating structures in the main linac. Every accelerating structure cell has four waveguides, terminated with individual RF loads, to damp the unwanted long-range transverse wakefields, in order to maintain beam stability in multi-bunch operation. [...]
CERN-ACC-2015-264.-
2015 - 3 p.
- Published in : (2015) , pp. TUPTY056
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.TUPTY056
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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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Design of a Variable X-band RF Power Splitter
/ Zha, Hao (CERN) ; Grudiev, Alexej (CERN) ; Gudkov, Dmitry (CERN) ; Syratchev, Igor (CERN)
The design of a two output ports, high power X-Band RF splitter with arbitrary split ratio is presented. This ratio is adjusted by mechanical changing the position a special RF short circuit piston. [...]
CERN-ACC-2015-225.-
2015 - 3 p.
- Published in : (2015) , pp. WEPHA025
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.WEPHA025
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Novel Manufacturing Concepts for 12 GHz High Gradient Accelerating Structures
/ Solodko, Anastasiya (CERN) ; Atieh, Said (CERN) ; Catalán Lasheras, Nuria (CERN) ; Grudiev, Alexej (CERN) ; Lebet, Serge (CERN) ; Wuensch, Walter (CERN) ; Zha, Hao (Beijing U. of Tech.)
CLIC high gradient accelerating structures (AS) work-ing in X-band are made of copper ultra-high precision discs, requiring both milling and turning operations. Discs are then joint together by diffusion bonding. [...]
CERN-ACC-2017-265; CLIC-Note-1131.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-THPAB039
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.THPAB039
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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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