eeFACT2016 - List of Authors (Zimmermann, F.)

Paper	Title	Page
MOT3AH2	Higgs Factory Concepts	25
	F. Zimmermann CERN, Geneva, Switzerland
	Funding: This work was supported in part by the European Commission under the FP7 Capacities project EuCARD-2, grant agreement 312453. Designs for future high-energy circular electron-positron colliders are based on both established and novel concepts. An appropriate design will allow these facilities to serve not only as ‘‘Higgs factories'', but also as Z, W and top factories, and, in addition, to become a possible first step to a higher-energy hadron collider.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-MOT3AH2
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TUT2H5	Towards a Preliminary FCC-ee Injector Design	90
	S. Ogur, Y. Papaphilippou, F. Zimmermann CERN, Geneva, Switzerland A.M. Barnyakov, A.E. Levichev, D.A. Nikiforov BINP SB RAS, Novosibirsk, Russia K. Furukawa, N. Iida, F. Miyahara, K. Oide KEK, Ibaraki, Japan
	The Future Circular Collider-ee aims to get high luminosity which mainly relies upon high charge and low geometric emittance in the collider. The FCC-ee is a future project of CERN to operate as Z, W, H and tt factories with varying energies between 45.6 to 175 GeV. Among those, the total charge requirement is peaked for Z-operation (i.e. 91500 bunches of electron and positron with 3.3·10¹⁰ particles per bunch) meanwhile this mode targets the smallest geometric emittance in the Collider. To reach the goal, the normal conducting S-band Linac has been designed to accelerate 4·10¹⁰ particles in a bunch to 6 GeV and send two bunches per RF pulse within a repetition of 100 Hz. The FCC-ee positrons will also be created inside the linac at 4.46 GeV and accelerated to 1.54 GeV. These positrons are damped at the designed Damping Ring at that energy, and then transferred back to the Linac to meet the same characteristics of electrons. Therefore, in this paper, we'd like to discuss the transmission and robustness of the Linac and the dynamic aperture of the Damping Ring which has to be large enough to accept the incoming beam and cover the probable shrink due to the misalignments.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT2H5
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WET3AH3	Extraction Line and Beam Dump for the Future Electron Positron Circular Collider	188
	A. Apyan ANSL, Yerevan, Armenia K. Oide KEK, Ibaraki, Japan F. Zimmermann CERN, Geneva, Switzerland
	The conceptual design of an extraction line and beam dump for the future electron positron circular collider is presented. The proposed extraction line, consisting of abort kicker system, spoilers and beam diagnostics apparatus transports the electron and positron beams to the main beam dumps. The beam must be spread over a large surface in order not to damage the beam dump and the window, which separates the ring from the dump. The extraction line redistributes bunches at different locations on the face of beam dump. Monte Carlo simulations using FLUKA have been performed to estimate the distribution of energy deposition on the window and beam dump to find the optimal absorber and its dimensions.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-WET3AH3
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THS1H1	Summary of Design Concepts	195
	F. Zimmermann, R.W. Aßmann CERN, Geneva, Switzerland A.P. Blondel DPNC, Genève, Switzerland
	This paper summarizes the session on design concepts at the ICFA workshop on future circular electron-positron factories "eeFACT2016".
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-THS1H1
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THS2H1	Summary of Impedance Issues and Beam Instabilities	210
	F. Zimmermann CERN, Geneva, Switzerland
	Funding: This work was supported in part by the European Commission under the FP7 Capacities project EuCARD-2, grant agreement 312453. This paper summarizes the session on impedance issues and beam instabilities at the ICFA workshop on future circular electron-positron factories "eeFACT2016" held at the Cockcroft Institute, Daresbury, from 24 to 27 October 2016. This session also covered active beam stabilization by feedback systems. Beam-beam effects and coherent beam-beam instabilities were addressed separately and, therefore, are not included here.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-THS2H1
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Paper

Title

Page

Higgs Factory Concepts

25

F. Zimmermann
CERN, Geneva, Switzerland

Funding: This work was supported in part by the European Commission under the FP7 Capacities project EuCARD-2, grant agreement 312453.
Designs for future high-energy circular electron-positron colliders are based on both established and novel concepts. An appropriate design will allow these facilities to serve not only as ‘‘Higgs factories'', but also as Z, W and top factories, and, in addition, to become a possible first step to a higher-energy hadron collider.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-MOT3AH2

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUT2H5

Towards a Preliminary FCC-ee Injector Design

90

S. Ogur, Y. Papaphilippou, F. Zimmermann
CERN, Geneva, Switzerland
A.M. Barnyakov, A.E. Levichev, D.A. Nikiforov
BINP SB RAS, Novosibirsk, Russia
K. Furukawa, N. Iida, F. Miyahara, K. Oide
KEK, Ibaraki, Japan

The Future Circular Collider-ee aims to get high luminosity which mainly relies upon high charge and low geometric emittance in the collider. The FCC-ee is a future project of CERN to operate as Z, W, H and tt factories with varying energies between 45.6 to 175 GeV. Among those, the total charge requirement is peaked for Z-operation (i.e. 91500 bunches of electron and positron with 3.3·10¹⁰ particles per bunch) meanwhile this mode targets the smallest geometric emittance in the Collider. To reach the goal, the normal conducting S-band Linac has been designed to accelerate 4·10¹⁰ particles in a bunch to 6 GeV and send two bunches per RF pulse within a repetition of 100 Hz. The FCC-ee positrons will also be created inside the linac at 4.46 GeV and accelerated to 1.54 GeV. These positrons are damped at the designed Damping Ring at that energy, and then transferred back to the Linac to meet the same characteristics of electrons. Therefore, in this paper, we'd like to discuss the transmission and robustness of the Linac and the dynamic aperture of the Damping Ring which has to be large enough to accept the incoming beam and cover the probable shrink due to the misalignments.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT2H5

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WET3AH3

Extraction Line and Beam Dump for the Future Electron Positron Circular Collider

188

A. Apyan
ANSL, Yerevan, Armenia
K. Oide
KEK, Ibaraki, Japan
F. Zimmermann
CERN, Geneva, Switzerland

The conceptual design of an extraction line and beam dump for the future electron positron circular collider is presented. The proposed extraction line, consisting of abort kicker system, spoilers and beam diagnostics apparatus transports the electron and positron beams to the main beam dumps. The beam must be spread over a large surface in order not to damage the beam dump and the window, which separates the ring from the dump. The extraction line redistributes bunches at different locations on the face of beam dump. Monte Carlo simulations using FLUKA have been performed to estimate the distribution of energy deposition on the window and beam dump to find the optimal absorber and its dimensions.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-WET3AH3

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THS1H1

Summary of Design Concepts

195

F. Zimmermann, R.W. Aßmann
CERN, Geneva, Switzerland
A.P. Blondel
DPNC, Genève, Switzerland

This paper summarizes the session on design concepts at the ICFA workshop on future circular electron-positron factories "eeFACT2016".

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-THS1H1

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THS2H1

Summary of Impedance Issues and Beam Instabilities

210

F. Zimmermann
CERN, Geneva, Switzerland

Funding: This work was supported in part by the European Commission under the FP7 Capacities project EuCARD-2, grant agreement 312453.
This paper summarizes the session on impedance issues and beam instabilities at the ICFA workshop on future circular electron-positron factories "eeFACT2016" held at the Cockcroft Institute, Daresbury, from 24 to 27 October 2016. This session also covered active beam stabilization by feedback systems. Beam-beam effects and coherent beam-beam instabilities were addressed separately and, therefore, are not included here.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-THS2H1

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)