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2025-10-07
16:20
RF Measurement and Tuning of the Linac4 Spare RFQ / Millar, Lee (CERN) ; Grudiev, Alexej (CERN)
The first radio-frequency (RF) accelerating structure in Linac4 is a 352.2 MHz, three-metre-long radio-frequency quadrupole (RFQ) that bunches and accelerates the 45 keV H- beam from the ion source to an energy of 3 MeV. [...]
CERN-ACC-NOTE-2025-0020. - 2025 - 86.
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2025-10-01
16:33
RF Design and Optimization of Linacs for the CLIC Main Beam Injector Complex / Kurtulus, Adnan ; Doebert, Steffen (CERN) ; Grudiev, Alexej (CERN) ; Latina, Andrea (CERN) ; Zhao, Yongke
The design of the CLIC main beam injector complex linacs necessitates high-gradient, traveling-wave accelerating structures engineered to withstand substantial beam-loading effects due to the elevated beam current and demanding acceleration requirements of CLIC operations. [...]
CERN-ACC-2025-0004 ; CLIC-Note-1201. - 2025 - 14.
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2025-09-26
15:15
Chamonix Workshop 2025 Summary / Carra, Federico (CERN) ; Charitonidis, Nikolaos (CERN) ; Papotti, Giulia (CERN) ; Sterbini, Guido (CERN)
The Chamonix Workshop 2025 took place from 27 to 30 January 2025 in the "Majestic" conference centre in Chamonix. [...]
CERN-ACC-NOTE-2025-0019. - 2025 - 68.
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2025-09-26
12:45
Shutter-type multi-point optical alignment using a Structured Laser Beam in vacuum / Niewiem, Witold Grzegorz (ETH, Zurich (main) ; CERN) ; Figura, Sebastian Antoni (CERN) ; Dusek, Martin (Liberec Tech. U. ; CERN) ; Mergelkuhl, Dirk (CERN) ; Gayde, Jean-Christophe (CERN) ; Wieser, Andreas (ETH, Zurich (main))
This paper presents an alignment concept employing a Structured Laser Beam (SLB) for offset measurements over a 140 m distance. The prototype consists of an SLB generator and three measurement stations within a vacuum system. [...]
CERN-ACC-2025-0003.- Geneva : CERN, 2025 - 19 p. - Published in : JINST 20 (2025) P07001 Fulltext: PDF;

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2025-09-18
10:42
Experimental results at the C.E.R.N. Photoemission Laboratory with co-deposition photocathodes in the frame of the CLIC studies / Chevallay, E.
CTF3-Note-104. - 2012 - 23.
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2025-09-16
10:14
Cable Transfer Function Measurements and Bunch Length Analysis in the SPS / Flowerdew, Jake ; Intelisano, Leandro ; Lasheen, Alexandre (CERN) ; Papotti, Giulia (CERN)
This note details the cable transfer function measurements taken in 2024 and 2025 for the longitudinal beam observation system in the SPS. [...]
CERN-ACC-NOTE-2025-0018. - 2025 - 15.
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2025-09-05
13:42
Optical diagnostic studies to analyse electron cyclotron resonance plasma produced in the GTS-LHC Ion Source / Bhaskar, Bichu ; Kuchler, Detlef (CERN) ; Koevener, Toke Kay Thomas
The GTS-LHC electron cyclotron resonance (ECR) ion source is an integral part of the chain of accelerators at CERN. It produces the heavy ion beams which are accel- erated using a series of accelerators from LINAC up to the LHC. [...]
CERN-ACC-2024-0007.- Geneva : CERN, 2024 - 4 p.
In : 26rd International Workshop on ECR Ion Sources (ECRIS2024), Darmstadt, Germany, 15 - 19 Sep 2024, pp.15-19

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2025-09-05
10:32
Chromaticity measurement in physics conditions with BTF and ADT-AC dipole (MD13463) / Buffat, Xavier (CERN) ; Giacomel, Lorenzo ; Mounet, Nicolas (CERN) ; Paraschou, Konstantinos ; Trad, Georges (CERN) ; Valuch, Daniel (CERN)
The result of an experiment demonstrating the readiness of the tools put in place to measure chromaticity through beam transfer function measurement on a single bunch while the full physics beam is circulating is presented. [...]
CERN-ACC-2025-0002. - 2025 - 8.
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2025-09-04
11:10
An Interferometric Multi-Sensor Absolute Distance Measurement System for Use in Harsh Environments / Sosin, Mateusz (CERN) ; Gonzalez Cobas, Juan David (CERN) ; Mohammed, Isa (Nottingham U.) ; Leach, Richard (Nottingham U.) ; Lipinski, Maciej Marek (CERN) ; Rude, Vivien (CERN) ; Rutkowski, Jaroslaw Marek ; Watrelot, Leonard
Fourier transform-based frequency sweeping interferometry (FT-FSI) is an interferometric technique that enables absolute distance measurement by detecting the beat frequencies from the interference of reflected signals. [...]
CERN-ACC-NOTE-2025-0017. - 2025 - 33.

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2025-08-13
16:28
Margin on the FMCM Threshold for the MBS in TT66 / Lannoy, Christophe ; Wollmann, Daniel (CERN)
On 1st April 2025, voltage ripples at the output of the MBS dipoles’ power converter in TT66 inhibited beam extraction to HiRadMat. [...]
CERN-ACC-NOTE-2025-0016. - 2025 - 14.
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