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Preserving Micrometre Tolerances Through the Assembly Process of an X-band Accelerating Structure
/ Sauza-Bedolla, Joel (CERN) ; Bursali, Hikmet (Izmir Inst. Tech.) ; Catalán Lasheras, Nuria (CERN) ; Grudiev, Alexej (CERN) ; Lebet, Serge (CERN) ; Rodriguez-Castro, Enrique (CERN) ; Sobrino-Mompean, Pablo (CERN) ; Solodko, Anastasiya (CERN) ; Szypula, Kamil (CERN)
The CLIC structures are designed for operating at X-Band, $2 \pi /3$ traveling wave mode with a loaded 100 MV/m gradient. Mechanical tolerances, at the submicron level, are required to satisfy the RF design constraints and beam dynamics and are reachable using ultra-precision diamond machining. [...]
CERN-ACC-2018-189; CLIC-Note-1155.-
2018 - 3 p.
- Published in : 10.18429/JACoW-LINAC2018-TUPO023
Fulltext: PDF;
In : 29th International Linear Accelerator Conference, Beijing, China, 16 - 21 Sep 2018, pp.TUPO023
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A Compact, Low-Field, Broadband Matching Section for Externally-Powered X-Band Dielectric-Loaded Accelerating Structures
/ Wei, Yelong (CERN ; Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.) ; Bursali, Hikmet (Rome U.) ; Catalán Lasheras, Nuria (CERN) ; Freemire, Ben (Euclid Techlabs, Solon) ; González Antón, Sergio (CERN) ; Grudiev, Alexej (CERN) ; Jing, Chunguang (Euclid Techlabs, Solon) ; Sauza-Bedolla, Joel (Lancaster U.) ; Wegner, Rolf (CERN) ; Welsch, Carsten P (Liverpool U. ; Cockcroft Inst. Accel. Sci. Tech.)
It has been technically challenging to efficiently couple external radiofrequency (RF) power to cylindrical dielectric-loaded accelerating (DLA) structures. This is especially true when the DLA structure has a high dielectric constant. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 495-498
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.495-498
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X-Band RF Spiral Load Optimization for Additive Manufacturing Mass Production
/ Bursali, Hikmet (CERN ; Rome U.) ; Catalán Lasheras, Nuria (CERN) ; Gerard, Romain Louis (CERN) ; Grudiev, Alexej (CERN) ; Gumenyuk, Oleg (CERN) ; Morales Sánchez, Pedro (CERN) ; Riffaud, Benoit (CERN) ; Sauza-Bedolla, Joel (Lancaster U.)
The CLIC main linac uses X-band traveling-wave normal conducting accelerating structures. The RF power not used for beam acceleration nor dissipated in the resistive wall is absorbed in two high power RF loads that should be as compact as possible to minimize the total footprint of the machine. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 1143-1146
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.1143-1146
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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 conditioning of X-band variable power splitter and phase shifter
/ del Pozo Romano, Veronica (CERN) ; Bursali, Hikmet (CERN) ; Catalán Lasheras, Nuria (CERN) ; Grudiev, Alexej (CERN) ; Pitman, Sam (CERN) ; Serpico, Claudio (Sincrotrone Trieste) ; Syratchev, Igor (CERN) ; Volpi, Matteo (Melbourne U. ; CERN)
The three X-band test facilities currently at CERN aim at qualifying CLIC structures prototypes but are also extensively used to qualify X-band components operation at high power. In order to upgrade one of the facilities from a single test line to a double test line facility, a high power variable splitter and variable phase shifter have been designed and manufactured at CERN. [...]
CERN-ACC-2019-222; CLIC-Note-1192.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPRB064
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPRB064
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High Power X-Band Generation Using Multiple Klystrons and Pulse Compression
/ Woolley, Benjamin (CERN) ; Argyropoulos, Theodoros (CERN) ; Catalán Lasheras, Nuria (CERN) ; Esperante Pereira, Daniel (Valencia U., IFIC) ; McMonagle, Gerard (CERN) ; Rey, Stephane (CERN) ; Syratchev, Igor (CERN) ; Tagg, Joseph (Natl. Instruments, Baden) ; Volpi, Matteo (Melbourne U.) ; Wuensch, Walter (CERN)
CERN has constructed and is operating a new X-band test stand containing two pairs of 12 GHz, 6 MW klystrons. By power combination through hybrid couplers and the use of pulse compressors, up to 45 MW of peak power can be sent to any of 4 test slots at pulse repetition rates up to 400 Hz. [...]
CERN-ACC-2017-260; CLIC-Note-1133.-
2017 - 3 p.
- Published in : 10.18429/JACoW-IPAC2017-THPIK095
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.THPIK095
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The Southern Hemisphere’s First X-Band Radio-Frequency Test Facility at the University of Melbourne
/ Volpi, Matteo (Melbourne U.) ; Boland, Mark J (Saskatchewan U., CLS) ; Catalán Lasheras, Nuria (CERN) ; Dowd, Rohan (ASP, Melbourne) ; González Antón, Sergio (CERN) ; McMonagle, Gerard (CERN) ; Rassool, Roger P (Melbourne U.) ; Sheehy, Suzanne L (Melbourne U.) ; Stapnes, Steinar (CERN) ; Taylor, Geoffrey N (Melbourne U.) et al.
The first Southern Hemisphere X-band Laboratory for Accelerators and Beams (X-LAB) is under construction at the University of Melbourne, and it will operate CERN X-band test stand containing two 12GHz 6MW klystron amplifiers. By power combination through hybrid couplers and the use of pulse compressors, up to 50 MW of peak power can be sent to any of 2 test slots at pulse repetition rates up to 400 Hz. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC '21 (2021) 3588-3591
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.3588-3591
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High-Gradient Breakdown Studies of an X-Band Accelerating Structure Operated in the Reversed Taper Direction
/ Wu, Xiaowei (CERN) ; Boronat Arévalo, Marçà Josep (CERN) ; Castilla, Alejandro (CERN) ; Catalán Lasheras, Núria (CERN) ; Edwards, Amelia V (CERN) ; Grudiev, Alexej (CERN) ; McMonagle, Gerard (CERN) ; Millar, William L (CERN) ; Syratchev, Igor (CERN) ; Wuensch, Walter (CERN)
The results of high-gradient tests of a tapered X-band traveling-wave accelerator structure powered in reversed direction are presented. Powering the tapered structure from the small aperture, normally output, at the end of the structure provides unique conditions for the study of gradient limits. [...]
JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 1543-1546
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.1543-1546
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