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Multiobjective genetic algorithm approach to optimize beam matching and beam transport in high-intensity hadron linacs
/ Yarmohammadi Satri, M (CERN ; IPM, Tehran) ; Lombardi, A M (CERN) ; Zimmermann, F (CERN)
In this article we demonstrate how a multiobjective genetic algorithm, like the nondominated sorting genetic algorithm II (NSGAII), and a selection tool, like the technique for order preference by similarity to ideal solution (TOPSIS), can be employed for beam matching and for optimizing the beam transport in the low and medium energy section of a modern hadron linac including space charge effect. Combining NSGAII with the particle tracking code TRAVEL v4.07, we determine the Pareto optimal front, and then apply TOPSIS for the final selection using the example of the 160 MeV H$^−$ LINAC4 at CERN. [...]
2019 - 10 p.
- Published in : Phys. Rev. Accel. Beams 22 (2019) 054201
Fulltext from Publisher: PDF;
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2.
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Beam Commissioning of Linac4 up to 12 MeV
/ Dimov, Veliko (CERN) ; Belli, Eleonora (CERN) ; Bellodi, Giulia (CERN) ; Lallement, Jean-Baptiste (CERN) ; Lombardi, Alessandra (CERN) ; Yarmohammadi Satri, Masoomeh (IPM, Tehran)
CERN Linac4 is made of a 3 MeV front end including a 45 keV source , a 3 MeV Radio Frequency Quadrupole (RFQ) and a fast chopper, followed by a 50 MeV Drift Tube Linac (DTL), a 100 MeV Cell-Coupled Drift Tube Linac (CCDTL) and a 160 MeV Pi-Mode Structure (PIMS). The Linac4 beam commissioning is performed in 6 stages of increasing energy. [...]
CERN-ACC-2015-016.-
2015 - 4 p.
- Published in : (2015) , pp. THPF085
Published version from JACoW: PDF; External link: JACOW
In : 6th International Particle Accelerator Conference, Richmond, VA, USA, 3 - 8 May 2015, pp.THPF085
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3.
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Linac4 Transverse and Longitudinal Emittance Reconstruction in the Presence of Space Charge
/ Lallement, Jean-Baptiste (CERN) ; Bellodi, Giulia (CERN) ; Dimov, Veliko (CERN) ; Lombardi, Alessandra (CERN) ; Yarmohammadi Satri, Masoomeh (CERN) ; Yarmohammadi Satri, Masoomeh
Linac4 is a pulsed, normal-conducting 160 Mev H^{−} linear accelerator presently under construction at CERN. It will replace the present 50 MeV Linac2 as injector of the proton accelerator complex as part of a project to increase the LHC luminosity. [...]
CERN-ACC-2014-371.-
2014 - 3 p.
- Published in : (2014) , pp. THPP033
Fulltext: thpp033 - PDF; thpp033_2 - PDF; External link: JACoW server
In : 27th Linear Accelerator Conference, Geneva, Switzerland, 31 Aug - 5 Sep 2014, pp.THPP033
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4.
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Transverse Beam Profile Measurements in the Linac4 Medium Energy Beam Transport
/ Yarmohammadi Satri, Masoomeh (CERN) ; Bellodi, Giulia (CERN) ; Dimov, Veliko (CERN) ; Lallement, Jean-Baptiste (CERN) ; Lombardi, Alessandra (CERN) ; Raich, Uli (CERN) ; Roncarolo, Federico (CERN) ; Zocca, Francesca (CERN)
Linac4 is a 160 MeV H^{−} linear accelerator presently under construction at CERN. It will replace the present 50 MeV proton Linac2 as injector of the proton accelerator complex as part of a project to increase the LHC luminosity. [...]
CERN-ACC-2014-381.-
2014 - 3 p.
- Published in : (2014) , pp. TUPP038
Fulltext: PDF; External link: JACoW server
In : 27th Linear Accelerator Conference, Geneva, Switzerland, 31 Aug - 5 Sep 2014, pp.TUPP038
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5.
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Longitudinal Beam Profile Measurements in Linac4 Commissioning
/ Bellodi, Giulia (CERN) ; Dimov, Veliko (CERN) ; Lallement, Jean-Baptiste (CERN) ; Lombardi, Alessandra (CERN) ; Raich, Uli (CERN) ; Roncarolo, Federico (CERN) ; Zocca, Francesca (CERN) ; Yarmohammadi Satri, Masoomeh
Linac4, the future 160 MeV H^{−} injector to the CERN Proton Synchrotron Booster, is presently under construction at CERN as a central step of the planned upgrade of the LHC injectors. The Linac front-end, composed of a 45 keV ion source, a Low Energy Beam Transport (LEBT), a 352.2 MHz Radio Frequency Quadrupole (RFQ) and a Medium Energy Beam Transport (MEBT) housing a beam chopper, has been installed and commissioned. [...]
CERN-ACC-2014-391.-
2014 - 3 p.
- Published in : (2014) , pp. MOPP025
Fulltext: PDF; External link: JACoW server
In : 27th Linear Accelerator Conference, Geneva, Switzerland, 31 Aug - 5 Sep 2014, pp.MOPP025
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6.
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Linac4 Low Energy Beam Measurements with Negative Hydrogen
/ Scrivens, R (CERN) ; Bellodi, G (CERN) ; Crettiez, O (CERN) ; Dimov, V (CERN) ; Gerard, D (CERN) ; Granemann Souza, E (CERN) ; Guida, R (CERN) ; Hansen, J (CERN) ; Lallement, J B (CERN) ; Lettry, J (CERN) et al.
Linac4, a 160 MeV normal-conducting H- linear accelerator, is the first step in the upgrade of the beam intensity available from the LHC proton injectors at CERN. The Linac4 Low Energy Beam Transport (LEBT) line from the pulsed 2 MHz RF driven ion source, to the 352 MHz RFQ has been built and installed at a test stand, and has been used to transport and match to the RFQ a pulsed 14 mA H- beam at 45 keV. [...]
CERN-ACC-2014-0327.-
Geneva : CERN, 2014 - 3 p.
- Published in : Rev. Sci. Instrum. 85 (2014) 02A729
Fulltext: PDF;
In : 15th International Conference on Ion Sources, Chiba, Japan, 9 - 13 Sep 2013, pp.02A729
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7.
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Status and plans for Linac4 installation and commissioning
/ Vretenar, M (CERN) ; Akroh, A (CERN) ; Arnaudon, L (CERN) ; Baudrenghien, P (CERN) ; Bellodi, G (CERN) ; Broere, J (CERN) ; Brunner, O (CERN) ; Comblin, J F (CERN) ; Coupard, J (CERN) ; Dimov, V A (CERN) et al.
Linac4 is a normal conducting 160 MeV Hˉ linear accelerator presently being installed and progressively commissioned at CERN. It will replace the ageing 50 MeV Linac2 as injector of the PS Booster (PSB), increasing at the same time its brightness by a factor of two thanks to the higher injection energy. [...]
CERN-ACC-2014-0143.-
Geneva : CERN, 2014 - 4 p.
Fulltext: PDF; External link: Published version from JaCoW
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.3332
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8.
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First commissioning experience with the LINAC4 3 MeV front-end at CERN
/ Lallement, J B (CERN) ; Akroh, A (CERN) ; Bellodi, G (CERN) ; Comblin, J F (CERN) ; Dimov, V A (CERN) ; Granemann Souza, E (CERN) ; Lettry, J (CERN) ; Lombardi, A M (CERN) ; Midttun, O (CERN) ; Ovalle, E (CERN) et al.
Linac4 is a normal-conducting 160 MeV H- linear accelerator presently under construction at CERN. It will replace the present 50 MeV Linac2 as injector of the proton accelerator complex as part of a project to increase the LHC luminosity. [...]
2013
Published version from JACoW: PDF;
In : North American Particle Accelerator Conference, Pasadena, CA, USA, 29 Sep - 04 Oct 2013, pp.52-56
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9.
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10.
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3 MeV Test Stand commissioning report
/ Bellodi, Guilia (CERN) ; Akroh, A ; Andreassen, O ; Comblin, J-F ; Dimov, V ; Lallement, J-B ; Martin, C ; Midttun, O ; Ovalle, E ; Raich, U et al.
Linac4 is a normal-conducting 160 MeV H- linear accelerator, presently under construction, that will replace the present 50 MeV Linac2 as injector of the CERN proton accelerator complex with the goal of increasing the LHC luminosity. [...]
CERN-ACC-2013-0259.
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2013. - 74 p.
Full text
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