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CLIC Notes

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2020-01-27
13:16
Localization of vacuum breakdown locations in RF structures using S-parameter data / WU, Chien Hung (the University of Oxford (GB)) ; Paszkiewicz, Jan (University of Oxford (GB))
This project is an investigation to find the breakdown locations using a new method involving group delays of the Scattering parameters (or S-parameters). [...]
CERN-ACC-2020-0006 ; CLIC-Note-1157. - 2019. - 13 p.
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2019-12-09
11:43
Behaviour of copper during initial conditioning in the pulse DC system / Profatilova, Iaroslava (CERN) ; Wuensch, Walter (CERN) ; Calatroni, Sergio (CERN)
Conditioning is a process that is used to improve the quality of RF accelerating structures before starting operation at full field and power. [...]
CERN-ACC-2019-0058 ; CLIC-Note-1145. - 2019. - 10 p.
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2019-08-21
08:59
CLIC study update August 2019 / Latina, Andrea (CERN) ; Schulte, Daniel (CERN) ; Stapnes, Steinar (CERN)
In 2018 the CLIC study submitted a number of reports as input to the update of European Strategy for Particle Physics, among them a detailed description of the CLIC accelerator complex and its performance. [...]
CERN-ACC-2019-0051 ; CLIC-Note-1143. - 2019. - 4 p.
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2019-05-13
11:28
Tolerance study for accelerating structure in the CLIC main linac / Liu, Jiayang (Tsinghua University / CERN) ; Grudiev, Alexej (CERN)
The tolerances are essential for defining the fabrication shape accuracy specification as well as the structure temperature control. [...]
CERN-ACC-2019-0049 ; CLIC-Note-1142. - 2019. - 17 p.
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2019-04-02
10:28
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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2019-04-02
10:28
Manufacturing of X-band Accelerating Structures: Metrology Analysis and Process Capability / Sauza-Bedolla, Joel (CERN) ; Atieh, Said (CERN) ; Catalán Lasheras, Nuria (CERN)
The fabrication tolerances of RF components are essential for CLIC X-band accelerating structures to perform efficiently. On one hand, the capability of high power accelerating structures depends on the shape accuracy and the asperity of the inner surfaces, when microwaves pass through the cavity. [...]
CERN-ACC-2018-190; CLIC-Note-1154.- 2018 - 3 p. - Published in : 10.18429/JACoW-LINAC2018-TUPO022 Fulltext: tupo022 - PDF; tupo022_2 - PDF;
In : 29th International Linear Accelerator Conference, Beijing, China, 16 - 21 Sep 2018, pp.TUPO022

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2019-03-28
08:36
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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2019-03-21
06:37
A New Spherical Pulse Compressor Working with Degenerated "Whispering Gallery" Mode / Li, Zongbin (SINAP, Shanghai ; Beijing, GUCAS) ; Fang, Wencheng (SINAP, Shanghai) ; Grudiev, Alexej (CERN) ; Gu, Qiang (SINAP, Shanghai) ; Zhao, Zhentang (SINAP, Shanghai)
This paper introduces a new design concept of spherical pulse compressor. The main characteristics of this new design can be described as: spherical storage cavity, degenerated “Whispering Gallery” mode and a compact mode launcher..
CERN-ACC-2018-201; CLIC-Note-1153.- 2018 - 3 p. - Published in : 10.18429/JACoW-LINAC2018-THPO109 Fulltext: thpo109 - PDF; thpo109_2 - PDF;
In : 29th International Linear Accelerator Conference, Beijing, China, 16 - 21 Sep 2018, pp.THPO109

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2019-01-15
06:22
Challenges and Status of Tuning Simulations for CLIC Traditional Beam Delivery System / Bodenstein, Ryan (JAI, UK) ; Burrows, Philip (JAI, UK) ; Marín, Eduardo (CERN)
The beam delivery system (BDS) for the 3 TeV version of the Compact Linear Collider (CLIC) has two main design types. One type is referred to as the local scheme, as it is approximately one kilometer shorter and corrects the chromaticity in both planes. [...]
CERN-ACC-2018-068; CLIC-Note-1147.- 2018 - 3 p. - Published in : 10.18429/JACoW-IPAC2018-MOPML010 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPML010

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2019-01-15
06:22
Update of the CLIC Positron Source / Han, Yanliang (Shandong U.) ; Bayar, Cafer (Ankara U.) ; Döbert, Steffen (CERN) ; Latina, Andrea (CERN) ; Ma, Lianliang (Shandong U.) ; Schulte, Daniel (CERN)
The baseline positron source of CLIC has been optimised for the 3 TeV c.o.m. energy. [...]
CERN-ACC-2018-077; CLIC-Note-1146.- 2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-MOPMF055 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF055

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