HB2016 - List of Authors (Lombardi, A.M.)

Paper

Title

Page

The LINAC4 Project

1

A.M. Lombardi
CERN, Geneva, Switzerland

Linac4 is a normal conducting, 160 MeV H⁻ ion accelerator that is being constructed within the scope of the LHC injectors upgrade project. Linac4 will be connected to the Proton Synchrotron Booster (PSB) during the next long LHC shut-down and it will replace the current 50 MeV hadron linac, Linac2. Linac4 is presently being commissioned, with the aim of achieving the final energy at the end of the year. A test of the injection chicane and a reliability run will follow. The beam commissioning, in steps of increasing energy, has been prepared by an extended series of studies and interlaced with phases of installation. In this paper we will detail the beam dynamics challenges and we will report on the commissioning results.

Slides MOAM2P20 [27.527 MB]

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TUPM4X01

LHC Injectors Upgrade for the HL-LHC

C. Bracco, J. Coupard, H. Damerau, A. Funken, B. Goddard, K. Hanke, A.M. Lombardi, D. Manglunki, S. Mataguez, M. Meddahi, B. Mikulec, G. Rumolo, R. Scrivens, E.N. Shaposhnikova, M. Vretenar
CERN, Geneva, Switzerland

The goal of the HL-LHC is to increase the LHC peak nominal Luminosity by a factor of seven in order to provide more accurate measurements of new particles and enable observation of rare processes that occur below the current sensitivity level. Achieving this target requires to double the beam intensity and reduce the emittance by 40%. All the LHC injectors, from the LINAC to the Super Proton Synchrotron (SPS) including the heavy ion chain, have to be improved to reliably supply such high brightness beams to the HL-LHC. The upgrade campaign will be completed during the Second Long Shutdown (LS2) in 2019-2020. The performance objectives and the status of this challenging program is presented.

Slides TUPM4X01 [10.021 MB]

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WEPM1Y01

Emittance Reconstruction Techniques in Presence of Space Charge Applied During the Linac4 Beam Commissioning

433

V.A. Dimov, J.-B. Lallement, A.M. Lombardi
CERN, Geneva, Switzerland
R. Gaur
RRCAT, Indore, India

The classical emittance reconstruction technique, based on analytic calculations using transfer matrices and beam profile measurements, is reliable only if the emittance is conserved and the space charge forces are negligible in the beamline between the reconstruction and measurement points. The effects of space charge forces prevent this method from giving sound results up to a relativistic beta of about 0.5 and make it inapplicable to the Linac4 commissioning at 50 and 100 MeV. To compensate for this drawback we have developed a dedicated technique, the forward method, which extends the classical method by combining it with an iterative process of multiparticle tracking including space charge forces. The forward method, complemented with a tomographic reconstruction routine, has been applied to transverse and longitudinal emittance reconstruction during the Linac4 beam commissioning. In this paper we describe the reconstruction process and its application during Linac4 beam commissioning.

Slides WEPM1Y01 [1.923 MB]

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FRAM3P01

Summary WG-B

A.M. Lombardi
CERN, Geneva, Switzerland
M. Ikegami
FRIB, East Lansing, Michigan, USA

Friday Summary

Slides FRAM3P01 [9.209 MB]

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Paper	Title	Page
MOAM2P20	The LINAC4 Project	1
	A.M. Lombardi CERN, Geneva, Switzerland
	Linac4 is a normal conducting, 160 MeV H⁻ ion accelerator that is being constructed within the scope of the LHC injectors upgrade project. Linac4 will be connected to the Proton Synchrotron Booster (PSB) during the next long LHC shut-down and it will replace the current 50 MeV hadron linac, Linac2. Linac4 is presently being commissioned, with the aim of achieving the final energy at the end of the year. A test of the injection chicane and a reliability run will follow. The beam commissioning, in steps of increasing energy, has been prepared by an extended series of studies and interlaced with phases of installation. In this paper we will detail the beam dynamics challenges and we will report on the commissioning results.
	Slides MOAM2P20 [27.527 MB]
Export •	reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPM4X01	LHC Injectors Upgrade for the HL-LHC
	C. Bracco, J. Coupard, H. Damerau, A. Funken, B. Goddard, K. Hanke, A.M. Lombardi, D. Manglunki, S. Mataguez, M. Meddahi, B. Mikulec, G. Rumolo, R. Scrivens, E.N. Shaposhnikova, M. Vretenar CERN, Geneva, Switzerland
	The goal of the HL-LHC is to increase the LHC peak nominal Luminosity by a factor of seven in order to provide more accurate measurements of new particles and enable observation of rare processes that occur below the current sensitivity level. Achieving this target requires to double the beam intensity and reduce the emittance by 40%. All the LHC injectors, from the LINAC to the Super Proton Synchrotron (SPS) including the heavy ion chain, have to be improved to reliably supply such high brightness beams to the HL-LHC. The upgrade campaign will be completed during the Second Long Shutdown (LS2) in 2019-2020. The performance objectives and the status of this challenging program is presented.
	Slides TUPM4X01 [10.021 MB]
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WEPM1Y01	Emittance Reconstruction Techniques in Presence of Space Charge Applied During the Linac4 Beam Commissioning	433
	V.A. Dimov, J.-B. Lallement, A.M. Lombardi CERN, Geneva, Switzerland R. Gaur RRCAT, Indore, India
	The classical emittance reconstruction technique, based on analytic calculations using transfer matrices and beam profile measurements, is reliable only if the emittance is conserved and the space charge forces are negligible in the beamline between the reconstruction and measurement points. The effects of space charge forces prevent this method from giving sound results up to a relativistic beta of about 0.5 and make it inapplicable to the Linac4 commissioning at 50 and 100 MeV. To compensate for this drawback we have developed a dedicated technique, the forward method, which extends the classical method by combining it with an iterative process of multiparticle tracking including space charge forces. The forward method, complemented with a tomographic reconstruction routine, has been applied to transverse and longitudinal emittance reconstruction during the Linac4 beam commissioning. In this paper we describe the reconstruction process and its application during Linac4 beam commissioning.
	Slides WEPM1Y01 [1.923 MB]
Export •	reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRAM3P01	Summary WG-B
	A.M. Lombardi CERN, Geneva, Switzerland M. Ikegami FRIB, East Lansing, Michigan, USA
	Friday Summary
	Slides FRAM3P01 [9.209 MB]
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