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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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Publication
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Exploratory Study of X-band Klystron Designs for Maximum Efficiency
/ Weatherford, Brandon (SLAC) ; Kowalczyk, Richard (SLAC) ; Dolgashev, Valery (SLAC) ; Neilson, Jeffrey (SLAC) ; Jensen, Aaron (Unlisted, US, MA) ; Syratchev, Igor (CERN) ; Cai, Jinchi (CERN)
Results are reported from an exploratory study of high efficiency X-band klystron designs. A variety of simulation tools are used to determine the peak achievable efficiency as a function of beam and circuit parameters. [...]
2018 - 2 p.
- Published in : 10.1109/IVEC.2018.8391533
In : 19th IEEE International Vacuum Electronics Conference, Monterey, CA, USA, 24 - 26 Apr 2018, pp.23-24
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4.
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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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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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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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An X-band Dielectric-based Wakefield Power Extractor
/ Jing, Chunguang (Euclid Techlabs, Solon) ; Antipov, Sergey (Euclid Techlabs, Solon) ; Kanareykin, Alexei (Euclid Techlabs, Solon) ; Schoessow, Paul (Euclid Techlabs, Solon) ; Conde, Manoel (Argonne) ; Gai, Wei (Argonne) ; Power, John (Argonne) ; Dolgashev, Valery (SLAC) ; Lewandowski, James (SLAC) ; Tantawi, Sami (SLAC) et al.
An X-band dielectric-based wakefield power extractor is under development to function as a high power rf source primarily for Two Beam Accelerator applications. A low surface electric field to gradient ratio and low fabrication cost are two main advantages of the dielectric-loaded accelerating/decelerating structure. [...]
2013 - 3 p.
- Published in : (2013) , pp. WEPFI090
Fulltext: PDF; External link: JACoW server
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.WEPFI090
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Prototype Development of the CLIC Crab Cavities
/ Burt, Graeme (Lancaster U.) ; Ambattu, Praveen Kumar (Lancaster U.) ; Dexter, Amos (Lancaster U.) ; Jenkins, Michael (Lancaster U.) ; Lingwood, Christopher (Lancaster U.) ; Woolley, Benjamin (Lancaster U.) ; Dolgashev, Valery (SLAC) ; Goudket, Philippe (Daresbury) ; McIntosh, Peter (Daresbury) ; Grudiev, Alexej (CERN) et al.
CLIC will require two crab cavities to align the beams to provide an effective head-on collision with a 20 mdeg crossing angle at the interaction point. An X-band system has been chosen for the crab cavities. [...]
CERN-ACC-2014-400.-
2014 - 4 p.
- Published in : (2014) , pp. THPP013
Fulltext: PDF; External link: JACoW server
In : 27th Linear Accelerator Conference, Geneva, Switzerland, 31 Aug - 5 Sep 2014, pp.THPP013
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Results from the CLIC X-BAND structure test program at the NLCTA
/ Adolphsen, Chris (SLAC) ; Bowden, Gordon (SLAC) ; Dolgashev, Valery (SLAC) ; Laurent, Lisa (SLAC) ; Tantawi, Sami (SLAC) ; Wang, Faya (SLAC) ; Wang, W Juwen (SLAC) ; Doebert, Steffen (CERN) ; Grudiev, Alexej (CERN) ; Riddone, Germana (CERN) et al.
As part of a SLAC-CERN-KEK collaboration on high gradient X-band structure research, several prototype structures for the CLIC linear collider study have been tested using two of the high power (300 MW) X-band rf stations in the NLCTA facility at SLAC. These structures differ in terms of their manufacturing (brazed disks and clamped quadrants), gradient profile (amount by which the gradient increases along the structure which optimizes efficiency and maximizes sustainable gradient) and HOM damping (use of slots or waveguides to rapidly dissipate dipole mode energy). [...]
CERN-OPEN-2013-033; SLAC-PUB-13697; CLIC-Note-799.-
Geneva : CERN, 2010 - 4 p.
Preprint: PDF; External link: Published version from PAC09
In : Particle Accelerator Conference 2009, Vancouver, Canada, 04 - 08 May 2009, pp.WE5PFP018
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