CERN Accelerating science

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1.
A Novel Method for Transverse Beam-Coupling Impedance Measurements in Particle Accelerator Devices Using the Bead-Pull Method / Antuono, Chiara (U. Rome La Sapienza (main) ; CERN) ; Sito, Leonardo (CERN ; Naples U.) ; Calzone, Eleonora (U. Rome La Sapienza (main) ; CERN) ; el Dali, D (CERN) ; Migliorati, Mauro (CERN ; U. Rome La Sapienza (main)) ; Mostacci, Andrea (CERN ; U. Rome La Sapienza (main)) ; Fienga, Francesco (CERN ; Naples U.) ; Marrazzo, Vincenzo Romano (CERN ; Naples U.) ; Breglio, Giovanni (CERN ; Naples U.) ; Rumolo, G (CERN) et al.
In high-energy particle accelerators, circulating particle beams with high intensity interact electromagnetically with their surroundings (i.e., metallic vacuum chambers of various geometries). These electromagnetic interactions, which are typically described through the concept of beam-coupling impedance, can represent a serious issue in terms of stability of the particle beam and heating on the accelerator structures. [...]
2024 - 9 p. - Published in : IEEE Trans. Instrum. Meas. 73 (2024) 8005209 Fulltext: PDF;
2.
Estimation of the thermal radiation induced desorption yield for hydrogen and helium at liquid helium temperatures / Jenninger, Berthold (CERN) ; Bez, Elena (CERN) ; Stöltzel, Anke (CERN) ; Rooijakkers, Fleur (CERN) ; Tiirinen, Eino (CERN)
Infrared radiation induced desorption of adsorbed molecules from cryogenic surfaces can lead to potentially detrimental pressure limitation in cryogenic UHV/XHV systems. For a sub-monolayer coverage, we determined the corresponding yields for hydrogen and helium exposed to room temperature radiation to be in the order of 1·10−4 and 0.02 m2(W·s)−1 respectively. [...]
2024 - 4 p. - Published in : Vacuum 233 (2025) 113931 Fulltext: PDF;
3.
Upgrade of the CERN SPS Extraction Protection Elements TPS / Borburgh, Jan (CERN) ; Balhan, Bruno (CERN) ; Barnes, Michael (CERN) ; Baud, Cedric (CERN) ; Fraser, Matthew (CERN) ; Kain, Verena (CERN) ; Maciariello, Fausto (CERN) ; Steele, Genevieve (CERN) ; Velotti, Francesco (CERN)
In 2006 the protection devices upstream of the septa in both extraction channels of the CERN SPS to the LHC were installed. Since then, new beam parameters have been proposed for the SPS beam towards the LHC in the framework of the LIU project. [...]
2015 - 4 p. - Published in : 10.18429/JACoW-IPAC2015-WEPMN068 Fulltext: PDF; External link: Full-text at JACoW Server
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.WEPMN068
4.
Specifications and Status of the New Electron Cooler for the CERN Antiproton Decelerator (AD) / Rossi, Adriana (CERN) ; Accettura, Carlotta (CERN) ; Andreazza, William (CERN) ; Bollazzi, Alessio (CERN) ; Cenede, Jean (CERN) ; Chritin, Nicolas (CERN) ; Coutron, Yannick (CERN) ; Ferreira Somoza, Jose (CERN) ; Frassier, Alexandre (CERN) ; Gamba, Davide (CERN) et al.
A new electron cooler for the Antiproton Decelerator (AD) is being designed at CERN, and will replace the current device (in operation for more than 40 years), during the next Long Shutdown (2026-2028). The functional specifications [ref. [...]
2024 - 6 p. - Published in : JACoW COOL 2023 (2024) 5-10 Fulltext: PDF;
In : 14th International Workshop on Beam Cooling and Related Topics (COOL '23), Montreux, Switzerland, 8 - 13 Oct 2023, pp.5-10
5.
Development of a Field Emission Electron Gun for Low Energy Electron Cooling / Tranquille, Gerard (CERN) ; Cenede, Jean (CERN) ; Galante, Bruno (CERN ; PSI, Villigen) ; Welker, Elisabeth-Sena (CERN ; Vienna, Tech. U.)
The use of carbon nanotubes (CNT) as a cold electron source for a low energy electron cooler has been studied in detail. To fully characterise different CNT arrays (conditioning process, emitted current, lifetime) and to investigate the optimum electrical configuration of the source to be used in an electron gun, a cold cathode test bench (CCTB) has been set up. [...]
2024 - 4 p. - Published in : JACoW COOL 2023 (2024) THPOSRP10 Fulltext: PDF;
In : 14th International Workshop on Beam Cooling and Related Topics (COOL '23), Montreux, Switzerland, 8 - 13 Oct 2023, pp.THPOSRP10
6.
A Test Bench for Characterizing Electron Cooler Components at up to -80 kVDC / Khatri, Ghanshyambhai (CERN) ; Cenede, Jean (CERN) ; Frassier, Alexandre (CERN) ; Tranquille, Gerard (CERN)
During the upcoming Long Shutdown 3 (LS3), the electron cooler of CERN’s Antiproton Decelerator (AD) will be replaced by a new electron cooler. The present electron cooler operates at the maximum energy of about 27keV. [...]
2024 - 4 p. - Published in : JACoW COOL 2023 (2024) THPOSRP06 Fulltext: PDF;
In : 14th International Workshop on Beam Cooling and Related Topics (COOL '23), Montreux, Switzerland, 8 - 13 Oct 2023, pp.THPOSRP06
7.
The mechanical behavior of the EIC beam screen during a magnet quench / Morrone, Marco (CERN) ; Garion, Cedric (CERN) ; Hetzel, Charles (Brookhaven Natl. Lab.) ; Chiggiato, Paolo (CERN)
As part of the Electron-Ion Collide (EIC) upgrade at Brookhaven National Laboratory (BNL), the development of new beam screens for the vacuum system is underway. The mechanical design of the beam screens received support from CERN, particularly in addressing the mechanical response during a magnet quench, i.e. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) TUPR59 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPR59
8.
Development of high-power electron gun and collector for the new antiproton decelerator electron cooler / Khatri, Ghanshyambhai (CERN) ; Frassier, Alexandre (CERN) ; Tranquille, Gerard (CERN) ; Cenede, Jean (CERN)
The electron cooler of the Antiproton Decelerator (AD) at CERN was initially developed for the Initial Cooling Experiment in 1979. It was subsequently adapted for use at LEAR and is currently employed in the AD. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) TUPS19 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPS19
9.
HL-LHC series collimators: key technical requirements, crucial production challenges and risk mitigation plan / Piccinni, Carla (CERN) ; Perillo Marcone, Antonio (CERN) ; Senajova, Dominika (CERN) ; Baillard, Dylan (CERN) ; Grenier-Boley, Edouard (CERN) ; Nuiry, Francois-Xavier (CERN) ; Calviani, Marco (CERN) ; Seidenbinder, Regis (CERN) ; Redaelli, Stefano (CERN)
In view of High Luminosity (HL) - Large Hadron Collider (LHC) project, an upgraded collimation system has been developed to accommodate a rise of ten times of the integrated luminosity compared to the LHC. A new series of collimators will be produced and installed in the machine during the Long Shutdown 3 (LS3) to take place during 2026-2028. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) TUPC75 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPC75
10.
Initial operational experience of an LHC injection kicker magnet upgraded for HL-LHC / Barnes, Michael (CERN) ; Diaz Zumel, Miguel (CERN) ; Bracco, Chiara (CERN) ; Standen, Dylan (CERN) ; Favia, Giorgia (CERN) ; Ducimetière, Laurent (CERN) ; Trubacova, Pavlina (CERN) ; Kramer, Thomas (CERN) ; Stadlbauer, Tobias (CERN) ; Gomes Namora, Vasco (CERN)
The intensity of the HL-LHC beam will be twice that of LHC. Hence, an upgrade of the LHC injection kickers (MKIs) is necessary for HL-LHC to avoid excessive beam induced heating of the MKIs. [...]
2024 - 4 p. - Published in : JACoW IPAC 2024 (2024) TUPC36 Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.TUPC36

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