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1.
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Hardware Limitations at Injection
/ Vlachodimitropoulos, V (CERN) ; Barnes, M J (CERN) ; Bartosik, H (CERN) ; Bracco, C (CERN) ; Chmielinska, A (CERN) ; Ducimetière, L (CERN) ; Fraser, M (CERN) ; Cid, L Vega (CERN) ; Velotti, F M (CERN) ; Weterings, W (CERN)
Hardware limitations due to the intercepting devices in the SPS, the SPS-to-LHC
transfer lines and the LHC will be briefly reviewed with potential operation
beam in mind for 2018. Heating issues in the LHC injection kicker magnet (MKI)
are also a possible future limiting factor for LHC's availability [...]
2019 - 4 p.
- Published in : (2019) , pp. 133-136
Fulltext: PDF;
In : 8th Evian Workshop on LHC beam operation, Evian Les Bains, France, 12 - 14 Dec 2017, pp.133-136
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2.
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Beam Commissioning of the New 160 MeV H⁻ Injection System of the CERN PS Booster
/ Renner, Elisabeth (CERN ; TU Vienna) ; Albright, Simon (CERN) ; Antoniou, Fanouria (CERN) ; Asvesta, Foteini (CERN) ; Bartosik, Hannes (CERN) ; Bracco, Chiara (CERN) ; Di Giovanni, Gian Piero (CERN) ; Jorat, Louise Olivia (CERN) ; Maclean, Ewen H (CERN) ; Meddahi, Malika (CERN) et al.
A key component to meeting the brightness targets of the LHC Injectors Upgrade (LIU) project at CERN is the new 160 MeV H⁻ charge exchange injection system into the Proton Synchrotron Booster. This system has been in beam commissioning since December 2020, optimizing the beam production schemes for tailoring different beams to the respective user-defined brightness targets. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 3116-3119
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.3116-3119
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3.
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ebook
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4.
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5.
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Measurements with the stripping foil test stand in the Linac4 Transfer Line
/ Bracco, Chiara (CERN) ; Jorat, Louise (CERN) ; Noulibos, Remy (CERN) ; van Trappen, Pieter (CERN) ; Weterings, Wim (CERN)
In 2020, after the CERN accelerators complex Long Shutdown 2 (LS2), a novel Linac4 (L4)-to-PS Booster (PSB) charge-exchange injection system will allow to transform the L4 160 MeV H$^-$ beam into H$^+$, which will be injected into the four PSB superposed rings. For this, a 200 µg/cm$^2$ carbon stripping foil will convert negative hydrogen ions (H$^-$) into protons by stripping off the electrons. [...]
2020 - 6 p.
- Published in : EPJ Web Conf. 229 (2020) 01003
Fulltext: PDF;
In : 29th World Conference of the International Nuclear Target Development Society, East Lansing, United States, 8 - 12 Oct 2018, pp.01003
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6.
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The new injection region of the CERN PS Booster
/ Weterings, Wim (CERN) ; Bracco, Chiara (CERN) ; Jorat, Louise Olivia (CERN) ; Meddahi, Malika (CERN) ; Noulibos, Remy (CERN) ; Van Trappen, Pieter (CERN)
During the Long Shutdown 2 (LS2) at CERN, the new Linac4 (L4) accelerator will be connected to the PS Booster (PSB) to inject 160 MeV H$^−$ beam into the 4 superposed PSB rings. In order to achieve this, we have designed, built and pre-assembled a completely new H$^−$ charge-exchange injection chicane system, with a carbon stripping foil unit to convert the negative hydrogen ions into protons by stripping off the electrons. [...]
CERN-ACC-2019-195.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPMP039
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPMP039
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7.
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Studies towards the new beam screen system of the LHC injection kicker magnet for HL-LHC operation
/ Vlachodimitropoulos, Vasileios (CERN) ; Barnes, Michael (CERN) ; Chmielinska, Agnieszka (Ecole Polytechnique, Lausanne ; CERN) ; Ducimetière, Laurent (CERN) ; Vega Cid, Lorena (CERN ; Madrid, Polytechnic U.) ; Weterings, Wim (CERN)
Although no heating issues were observed in the Large Hadron Collider’s (LHC) injection kicker magnets (MKIs) during Run 2, simulations suggest that for operation with the high intensity beams of the High Luminosity LHC (HL-LHC) project, the magnet’s ferrite yokes will reach their Curie temperature, thus leading to long turnaround times before a new beam can be safely injected into the machine. To safely enter the HL-LHC era, a campaign to redesign the kicker’s beam screen was launched. [...]
CERN-ACC-2019-247.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-THPRB074
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPRB074
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8.
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Operational experience of a prototype LHC injection kicker magnet with a low SEY coating and redistributed power deposition
/ Barnes, Michael (CERN) ; Bracco, Chiara (CERN) ; Bregliozzi, Giuseppe (CERN) ; Chmielinska, Agnieszka (Ecole Polytechnique, Lausanne ; CERN) ; Ducimetière, Laurent (CERN) ; Goddard, Brennan (CERN) ; Iadarola, Giovanni (CERN) ; Kramer, Thomas (CERN) ; Vega Cid, Lorena (Madrid, Polytechnic U. ; CERN) ; Vlachodimitropoulos, Vasileios (CERN) et al.
In the event that it is necessary to exchange an LHC injection kicker magnet (MKI), the newly installed kicker magnet would limit operation for a few hundred hours due to dynamic vacuum. A surface coating with a low secondary electron yield, applied to the inner surface of an alumina tube to reduce dynamic vacuum activity without increasing the probability of Unidentified Falling Objects, and which is compatible with the high voltage environment, was included in an upgraded MKI installed in the LHC during the 2017-18 Year End Technical Stop. [...]
CERN-ACC-2019-249.-
2019 - 7 p.
- Published in : (2019) , pp. THPRB072
- Published in : J. Phys.: Conf. Ser. 1350 (2019) 012145
Preprint: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPRB072
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9.
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THE NEW INJECTION REGION OF THE CERN PS BOOSTER
Reference: Poster-2019-690
Keywords: PSB PS Booster Charge exchange Injection Stripping H-
Created: 2019. -1 p
Creator(s): Weterings, Wim; Bracco, Chiara; Jorat, Louise Olivia; Meddahi, Malika; Noulibos, Remy [...]
During the Long Shutdown 2 (LS2) at CERN, the new Linac4 (L4) accelerator will be connected to the PS Booster (PSB) to inject 160 MeV H− beam into the 4 superposed PSB rings. In order to achieve this, we have designed, built and pre-assembled a completely new H− charge-exchange injection chicane system, with a carbon stripping foil unit to convert the negative hydrogen ions into protons by stripping off the electrons. In parallel, we have built and installed a test stand in the L4 transfer line enabling us to gain valuable experience with operation of the stripping foil system and to evaluate different foil types during the L4 reliability runs. This paper describes the final design of the new PSB injection region and reports on the important test results obtained with the stripping foil test stand.
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© CERN Geneva
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10.
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An Upgraded LHC Injection Kicker Magnet
/ Barnes, Michael (CERN) ; Bracco, Chiara (CERN) ; Bregliozzi, Giuseppe (CERN) ; Chmielinska, Agnieszka (CERN) ; Ducimetière, Laurent (CERN) ; Goddard, Brennan (CERN) ; Kramer, Thomas (CERN) ; Neupert, Holger (CERN) ; Vega Cid, Lorena (CERN) ; Vlachodimitropoulos, Vasileios (CERN) et al.
An upgrade of the LHC injection kickers is necessary for HL-LHC to avoid excessive beam induced heating of these magnets: the intensity of the HL-LHC beam will be twice that of LHC. In addition, in the event that it is necessary to exchange an injection kicker magnet, the newly installed kicker magnet would limit HL-LHC operation for a few hundred hours due to dynamic vacuum activity. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-WEPMK003
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPMK003
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