IPAC2017 - List of Keywords (hadron)

Paper	Title	Other Keywords	Page
MOPIK029	Energy Deposition and Activation Studies of the ESSnuSB Horn Station	target, proton, neutron, linac	561
	E. Bouquerel, E. Baussan, M. Dracos IPHC, Strasbourg Cedex 2, France N. Vassilopoulos IHEP, Beijing, People's Republic of China
	Funding: This project is now supported by the COST Action CA15139 Combining forces for a novel European facility for neutrino-antineutrino symmetry-violation discovery (EuroNuNet). The ESS'SB project foresees the production of a very intense neutrino beam to enable the discovery of leptonic CP violation. In addition to the neutrinos, a copious number of muons that could be used by a future Neutrino Factory and a muon collider will also be produced at the same time. This facility will use the world's most intense pulsed spallation neutron source, the European Spallation Source (ESS) in Lund. Its LINAC is expected to be operational by 2023, producing 2 GeV protons with a power of 5 MW. The primary proton beam line completing the linear accelerator will consist of one or several accumulator rings and a proton beam switchyard. The secondary beam line producing neutrinos and muons will consist of a four-horn target station, a decay tunnel and a beam dump. To detect the produced neutrinos a far megaton scale Water Cherenkov detector will be placed at a baseline of about 500 km in one of the existing active mines in Sweden. The estimation of the energy deposited and the activation within this secondary beam line are discussed in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK029
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TUPVA002	Updates on the Optics of the Future Hadron-Hadron Collider FCC-hh	quadrupole, dipole, optics, sextupole	2023
	A. Chancé, D. Boutin, B. Dalena CEA/IRFU, Gif-sur-Yvette, France B.J. Holzer, A. Langner, D. Schulte CERN, Geneva, Switzerland
	Funding: The European Circular Energy-Frontier Collider Study (EuroCirCol) project has received funding from the European Union's Horizon 2020 research and innovation programme under grant No 654305. The FCC-hh (Future Hadron-Hadron Circular Collider) is one of the three options considered for the next generation accelerator in high-energy physics as recommended by the European Strategy Group. The layout of FCC-hh has been optimized to a more compact design following recommendations from civil engineering aspects. The updates on the first order and second order optics of the ring will be shown for collisions at the required centre-of-mass energy of 100 TeV. Special emphasis is put on the dispersion suppressors and general beam cleaning sections as well as first considerations of injection and extraction sections.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPVA002
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TUPVA037	FCC-hh Final-Focus for Flat-Beams: Parameters and Energy Deposition Studies	optics, luminosity, collider, quadrupole	2139
	J.L. Abelleira, E. Cruz Alaniz, A. Seryi, L. van Riesen-Haupt JAI, Oxford, United Kingdom M.I. Besana CERN, Geneva, Switzerland
	Funding: The European Circular Energy-Frontier Collider Study (EuroCirCol), EU's Horizon 2020 grant No 654305. The international Future Circular Collider (FCC) study comprises the study of a new scientific structure in a tunnel of 100 km. This will allow the installation of two accelerators, a 45.6'175 GeV lepton collider and a 100-TeV hadron collider. An optimized design of a final-focus system for the hadron collider is presented here. The new design is more compact and enables unequal β^* in both planes, whose choice is justified here. This is followed by energy deposition studies, where the total dose in the magnets as a consequence of the collision debris is evaluated.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPVA037
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TUPVA146	6D Phase Space Measurement of Low Energy, High Intensity Hadron Beam	simulation, experiment, dipole, quadrupole	2441
	B.L. Cathey ORNL RAD, Oak Ridge, Tennessee, USA A.V. Aleksandrov, S.M. Cousineau, A.P. Zhukov ORNL, Oak Ridge, Tennessee, USA
	Funding: SNS is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy. The work has been partially supported by NSF grant 1535312 The goal of this experiment is to measure the full 6D phase space of a low energy, high intensity hadron beam. We use 4D emittance measurement techniques for the transverse plane combined with dispersion measurement and a beam shape monitor to provide the longitudinal phase space. The Beam Testing Facility (BTF) at the Spallation Neutron Source (SNS), a 2.5 MeV functional duplicate front end of the SNS accelerator is being used to facilitate the measurement. Early 6D measurements will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPVA146
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WEPAB124	Study of Hadron-Photon Colliders for Secondary Beam Generation	photon, proton, collider, secondary-beams	2865
	L. Serafini, C. Curatolo Istituto Nazionale di Fisica Nucleare, Milano, Italy F. Broggi INFN/LASA, Segrate (MI), Italy
	We summarize the potentialities of combining two well developed technologies, which are advancing the frontiers of hadron colliders and of light sources, namely the hadron colliders for high energy physics, and the FELs for applied and fundamental science with light, towards the generation of secondary beams with unprecedented characteristics. The collision between their typical pulses of high energy protons and X-ray photons opens a collider scenario with potentials for luminosities in excess of 10³⁸ s^-1cm^-2, adequate to generate TeV-class pion, muon, neutrino and photon beams with very high phase space densities. We report results based on Monte Carlo simulations of such a hadron-photon collider, aiming at qualifying the features of these secondary beams in view of experiments to be performed directly, or towards the design of a new kind of muon collider. C. Curatolo, et al., Nuclear Instruments & Methods in Physics Research A (2016), http://dx.doi.org/10.1016/j. nima.2016.09.002i
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPAB124
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WEPVA116	HL-LHC Inner Triplet Powering and Control Strategy	controls, quadrupole, simulation, luminosity	3544
	S. Yammine, H. Thiesen CERN, Geneva, Switzerland
	In order to achieve the target 3000 fb-1 integrated field for the HL-LHC (High Luminosity ' Large Hadron Collider) at ATLAS and CMS, new large aperture quadrupoles are required for the final focusing triplet magnets before the interaction points. These low-' magnets, based on the Nb3Sn technology, deliver a peak field of 11.4 T. They consist of two outer quadrupoles, Q1 and Q3 and a central one divided into two identical magnets, Q2a and Q2b. To optimize the powering and the beam dynamics of these triplets, the quadrupoles will be powered in series by a single high-current two quadrants (2-Q) converter [18 kA, ±10 V]. Three 4-Q trim power converters are added over Q1 [±2 kA, ±10 V], Q2a [±0.12 kA, ±10 V] and Q3 [±2 kA, ±10 V] to account for possible transfer function difference between the quadrupoles. This paper presents the powering scheme of the four mentioned coupled circuits. A digital control strategy, using four standard LHC digital controllers, to decouple the four systems and to achieve a high precision control is proposed and discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA116
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WEPVA151	The eRHIC Interaction Region Magnets	electron, quadrupole, dipole, shielding	3624
	B. Parker, R.B. Palmer, H. Witte BNL, Upton, Long Island, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy. Designing eRHIC Interaction Region (IR) magnets faces special Machine Detector Interface challenges. Based upon HERA-II experience, a fundamental consideration is to avoid excessive background due to synchrotron radiation striking masks and septa in the vicinity of the experiment. Circumventing such radiation is problematic because the colliding beams have quite different rigidities; we must shield the e-beam from hadron IR magnet multi-tesla coil fields. On the outgoing-hadron, i.e. forward IR side, this difficulty is compounded by needing large hadron beam apertures to enable downstream separation and experimental detection of a mix of scattered and produced forward going charged particles and (in the electron-ion case) a wide-spread cone of neutrons. Here we present superconducting magnet designs with combinations of active and passive shielding and Sweet Spot coils to meet these requirements along with the design of a superferric spectrometer dipole, with an integrated cancel coil, that extends the forward experimental acceptance.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA151
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THPAB005	Improvement of the Analytic Vlasov Solver DELPHI	simulation, impedance, synchrotron, proton	3688
	D. Amorim Université Grenoble Alpes, Grenoble, France N. Biancacci, K.S.B. Li, E. Métral CERN, Geneva, Switzerland
	The simulation code DELPHI is an analytic Vlasov solver which allows to evaluate the beam transverse stability with respect to impedance effects. It allows to perform fast scans over parameters such as chromaticity, damper gain or beam intensity for a given impedance model and particle distribution. In order to improve the simulation code, new longitudinal particle distributions have been implemented. The simulations results obtained with these distributions are compared to theoretical predictions. An additional post-processing of DELPHI's output has also been implemented, allowing to reconstruct the signal seen by head-tail stripline monitors, in particular in presence of bunch-by-bunch damper. The results are compared to theoretical models, to pyHEADTAIL simulations and to measurements performed in the LHC.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB005
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THPAB043	Evolution of Python Tools for the Simulation of Electron Cloud Effects	simulation, electron, interface, toolkit	3803
	G. Iadarola, E. Belli, K.S.B. Li, L. Mether, A. Romano, G. Rumolo CERN, Geneva, Switzerland
	PyECLOUD was originally developed as a tool for the simulation of electron cloud build-up in particle accelerators. Over the last five years the code has become part of a wider set of modular and scriptable python tools that can be combined to study different effects of the e-cloud in increasingly complex scenarios. The Particle In Cell solver originally included in PyECLOUD later developed into a stand-alone general purpose library (PyPIC) that now includes advanced features like a refined modeling of curved boundaries and optimized resolution based on the usage of nested grids. The effects of the e-cloud on the beam dynamics can be simulated interfacing PyECLOUD with the PyHEADTAIL code. These simulations can be computationally very demanding due to the multi-scale nature of this kind of problems. Hence, a dedicated parallelization layer (PyPARIS) has been recently developed to profit of parallel computing resources in order to significantly speed-up the computation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB043
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FRYCA1	The Future of High-energy Accelerators	collider, electron, proton, positron	4856
	J. Mnich DESY, Hamburg, Germany
	The physics results from high energy colliders, neutrino experiments and from experiments in space are changing the particle physics landscape. In the last decade several accelerator designs and studies have taken shape and reached a high level of maturity both at the high energy and high intensity frontiers. The talk should review the physics questions facing the HEP community and the strategy to address them in view of the next update of the European Strategy for Particle Physics.
	Slides FRYCA1 [9.087 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-FRYCA1
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Paper

Title

Other Keywords

Page

MOPIK029

Energy Deposition and Activation Studies of the ESSnuSB Horn Station

target, proton, neutron, linac

561

E. Bouquerel, E. Baussan, M. Dracos
IPHC, Strasbourg Cedex 2, France
N. Vassilopoulos
IHEP, Beijing, People's Republic of China

Funding: This project is now supported by the COST Action CA15139 Combining forces for a novel European facility for neutrino-antineutrino symmetry-violation discovery (EuroNuNet).
The ESS'SB project foresees the production of a very intense neutrino beam to enable the discovery of leptonic CP violation. In addition to the neutrinos, a copious number of muons that could be used by a future Neutrino Factory and a muon collider will also be produced at the same time. This facility will use the world's most intense pulsed spallation neutron source, the European Spallation Source (ESS) in Lund. Its LINAC is expected to be operational by 2023, producing 2 GeV protons with a power of 5 MW. The primary proton beam line completing the linear accelerator will consist of one or several accumulator rings and a proton beam switchyard. The secondary beam line producing neutrinos and muons will consist of a four-horn target station, a decay tunnel and a beam dump. To detect the produced neutrinos a far megaton scale Water Cherenkov detector will be placed at a baseline of about 500 km in one of the existing active mines in Sweden. The estimation of the energy deposited and the activation within this secondary beam line are discussed in this paper.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK029

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TUPVA002

Updates on the Optics of the Future Hadron-Hadron Collider FCC-hh

quadrupole, dipole, optics, sextupole

2023

A. Chancé, D. Boutin, B. Dalena
CEA/IRFU, Gif-sur-Yvette, France
B.J. Holzer, A. Langner, D. Schulte
CERN, Geneva, Switzerland

Funding: The European Circular Energy-Frontier Collider Study (EuroCirCol) project has received funding from the European Union's Horizon 2020 research and innovation programme under grant No 654305.
The FCC-hh (Future Hadron-Hadron Circular Collider) is one of the three options considered for the next generation accelerator in high-energy physics as recommended by the European Strategy Group. The layout of FCC-hh has been optimized to a more compact design following recommendations from civil engineering aspects. The updates on the first order and second order optics of the ring will be shown for collisions at the required centre-of-mass energy of 100 TeV. Special emphasis is put on the dispersion suppressors and general beam cleaning sections as well as first considerations of injection and extraction sections.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPVA002

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TUPVA037

FCC-hh Final-Focus for Flat-Beams: Parameters and Energy Deposition Studies

optics, luminosity, collider, quadrupole

2139

J.L. Abelleira, E. Cruz Alaniz, A. Seryi, L. van Riesen-Haupt
JAI, Oxford, United Kingdom
M.I. Besana
CERN, Geneva, Switzerland

Funding: The European Circular Energy-Frontier Collider Study (EuroCirCol), EU's Horizon 2020 grant No 654305.
The international Future Circular Collider (FCC) study comprises the study of a new scientific structure in a tunnel of 100 km. This will allow the installation of two accelerators, a 45.6'175 GeV lepton collider and a 100-TeV hadron collider. An optimized design of a final-focus system for the hadron collider is presented here. The new design is more compact and enables unequal β^* in both planes, whose choice is justified here. This is followed by energy deposition studies, where the total dose in the magnets as a consequence of the collision debris is evaluated.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPVA037

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TUPVA146

6D Phase Space Measurement of Low Energy, High Intensity Hadron Beam

simulation, experiment, dipole, quadrupole

2441

B.L. Cathey
ORNL RAD, Oak Ridge, Tennessee, USA
A.V. Aleksandrov, S.M. Cousineau, A.P. Zhukov
ORNL, Oak Ridge, Tennessee, USA

Funding: SNS is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy. The work has been partially supported by NSF grant 1535312
The goal of this experiment is to measure the full 6D phase space of a low energy, high intensity hadron beam. We use 4D emittance measurement techniques for the transverse plane combined with dispersion measurement and a beam shape monitor to provide the longitudinal phase space. The Beam Testing Facility (BTF) at the Spallation Neutron Source (SNS), a 2.5 MeV functional duplicate front end of the SNS accelerator is being used to facilitate the measurement. Early 6D measurements will be presented.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPVA146

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WEPAB124

Study of Hadron-Photon Colliders for Secondary Beam Generation

photon, proton, collider, secondary-beams

2865

L. Serafini, C. Curatolo
Istituto Nazionale di Fisica Nucleare, Milano, Italy
F. Broggi
INFN/LASA, Segrate (MI), Italy

We summarize the potentialities of combining two well developed technologies, which are advancing the frontiers of hadron colliders and of light sources, namely the hadron colliders for high energy physics, and the FELs for applied and fundamental science with light, towards the generation of secondary beams with unprecedented characteristics. The collision between their typical pulses of high energy protons and X-ray photons opens a collider scenario with potentials for luminosities in excess of 10³⁸ s^-1*cm^-2, adequate to generate TeV-class pion, muon, neutrino and photon beams with very high phase space densities. We report results based on Monte Carlo simulations of such a hadron-photon collider*, aiming at qualifying the features of these secondary beams in view of experiments to be performed directly, or towards the design of a new kind of muon collider.
C. Curatolo, et al., Nuclear Instruments & Methods in Physics Research A (2016), http://dx.doi.org/10.1016/j. nima.2016.09.002i

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WEPVA116

HL-LHC Inner Triplet Powering and Control Strategy

controls, quadrupole, simulation, luminosity

3544

S. Yammine, H. Thiesen
CERN, Geneva, Switzerland

In order to achieve the target 3000 fb-1 integrated field for the HL-LHC (High Luminosity ' Large Hadron Collider) at ATLAS and CMS, new large aperture quadrupoles are required for the final focusing triplet magnets before the interaction points. These low-' magnets, based on the Nb3Sn technology, deliver a peak field of 11.4 T. They consist of two outer quadrupoles, Q1 and Q3 and a central one divided into two identical magnets, Q2a and Q2b. To optimize the powering and the beam dynamics of these triplets, the quadrupoles will be powered in series by a single high-current two quadrants (2-Q) converter [18 kA, ±10 V]. Three 4-Q trim power converters are added over Q1 [±2 kA, ±10 V], Q2a [±0.12 kA, ±10 V] and Q3 [±2 kA, ±10 V] to account for possible transfer function difference between the quadrupoles. This paper presents the powering scheme of the four mentioned coupled circuits. A digital control strategy, using four standard LHC digital controllers, to decouple the four systems and to achieve a high precision control is proposed and discussed.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA116

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WEPVA151

The eRHIC Interaction Region Magnets

electron, quadrupole, dipole, shielding

3624

B. Parker, R.B. Palmer, H. Witte
BNL, Upton, Long Island, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy.
Designing eRHIC Interaction Region (IR) magnets faces special Machine Detector Interface challenges. Based upon HERA-II experience, a fundamental consideration is to avoid excessive background due to synchrotron radiation striking masks and septa in the vicinity of the experiment. Circumventing such radiation is problematic because the colliding beams have quite different rigidities; we must shield the e-beam from hadron IR magnet multi-tesla coil fields. On the outgoing-hadron, i.e. forward IR side, this difficulty is compounded by needing large hadron beam apertures to enable downstream separation and experimental detection of a mix of scattered and produced forward going charged particles and (in the electron-ion case) a wide-spread cone of neutrons. Here we present superconducting magnet designs with combinations of active and passive shielding and Sweet Spot coils to meet these requirements along with the design of a superferric spectrometer dipole, with an integrated cancel coil, that extends the forward experimental acceptance.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA151

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THPAB005

Improvement of the Analytic Vlasov Solver DELPHI

simulation, impedance, synchrotron, proton

3688

D. Amorim
Université Grenoble Alpes, Grenoble, France
N. Biancacci, K.S.B. Li, E. Métral
CERN, Geneva, Switzerland

The simulation code DELPHI is an analytic Vlasov solver which allows to evaluate the beam transverse stability with respect to impedance effects. It allows to perform fast scans over parameters such as chromaticity, damper gain or beam intensity for a given impedance model and particle distribution. In order to improve the simulation code, new longitudinal particle distributions have been implemented. The simulations results obtained with these distributions are compared to theoretical predictions. An additional post-processing of DELPHI's output has also been implemented, allowing to reconstruct the signal seen by head-tail stripline monitors, in particular in presence of bunch-by-bunch damper. The results are compared to theoretical models, to pyHEADTAIL simulations and to measurements performed in the LHC.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB005

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THPAB043

Evolution of Python Tools for the Simulation of Electron Cloud Effects

simulation, electron, interface, toolkit

3803

G. Iadarola, E. Belli, K.S.B. Li, L. Mether, A. Romano, G. Rumolo
CERN, Geneva, Switzerland

PyECLOUD was originally developed as a tool for the simulation of electron cloud build-up in particle accelerators. Over the last five years the code has become part of a wider set of modular and scriptable python tools that can be combined to study different effects of the e-cloud in increasingly complex scenarios. The Particle In Cell solver originally included in PyECLOUD later developed into a stand-alone general purpose library (PyPIC) that now includes advanced features like a refined modeling of curved boundaries and optimized resolution based on the usage of nested grids. The effects of the e-cloud on the beam dynamics can be simulated interfacing PyECLOUD with the PyHEADTAIL code. These simulations can be computationally very demanding due to the multi-scale nature of this kind of problems. Hence, a dedicated parallelization layer (PyPARIS) has been recently developed to profit of parallel computing resources in order to significantly speed-up the computation.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB043

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FRYCA1

The Future of High-energy Accelerators

collider, electron, proton, positron

4856

J. Mnich
DESY, Hamburg, Germany

The physics results from high energy colliders, neutrino experiments and from experiments in space are changing the particle physics landscape. In the last decade several accelerator designs and studies have taken shape and reached a high level of maturity both at the high energy and high intensity frontiers. The talk should review the physics questions facing the HEP community and the strategy to address them in view of the next update of the European Strategy for Particle Physics.

Slides FRYCA1 [9.087 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-FRYCA1

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