eeFACT2016 - List of Keywords (radiation)

Paper	Title	Other Keywords	Page
MOOTH1	Overview of High Energy e⁺e⁻ Factories	ion, dynamic-aperture, sextupole, collider	1
	K. Oide KEK, Ibaraki, Japan
	Designs of e⁺e⁻ colliders from the Z-pole and above are introduced. Two projects, CEPC and FCC-ee, are discussed. If we compare their schemes, a partial double ring (CEPC) and a full double ring (FCC-ee), find several important differences that affect the performance. On the other hand, there are a number of similarities in both designs, such as the crab-waist scheme, crossing angle, optimization of the dynamic aperture, etc.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-MOOTH1
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TUT1AH2	Design of Interaction Region and MDI at CEPC	ion, detector, background, solenoid	53
	Q.L. Xiu, J. Gao, X.C. Lou, B. Sha, D. Wang, Y. Wang, H. Zhu IHEP, Bejing, People's Republic of China
	The CEPC is a proposed circular electron positron collider to study the Higgs boson more accurately. To make sure the machine works well, the compatibility of the machine and the detector is very important. In order to make sure the detector is compatible with the machine, two kinds of problems must be resolved. Firstly, the mutual influence between the machine and the detector must be well studied. It includes the beam induced background, the influence on the beam status from the detector solenoid field and so on. Secondly, the interface between the machine and the detector must be well designed, including the mechanical supporting, the procedure to assemble the interaction region and so on. In this talk, we present the recent progress of the IR design and MDI study of CEPC. The dominant sources of beam induced background have been studied and some preliminary results are obtained. The compensating solenoid and anti-solenoid will be used to suppress the influence on the beam status from the detector solenoid. A global design of the interaction region is undergoing to balance the conflict of performance between the machine and the detector.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT1AH2
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TUT3AH1	Collective Effects Issues for FCC-ee	ion, impedance, wakefield, synchrotron	100
	M. Migliorati University of Rome La Sapienza, Rome, Italy E. Belli CERN, Geneva, Switzerland G. Castorina, B. Spataro, M. Zobov INFN/LNF, Frascati (Roma), Italy S. Persichelli LBNL, Berkeley, California, USA
	The Future Circular Collider study, hosted by CERN to design post-LHC particle accelerator options in a worldwide context, represents a great challenge under several aspects, which require R&D on beam dynamics and new technologies. One very critical point is represented by collective effects, generated by the interaction of the beam with self-induced electromagnetic fields, called wake fields, which could produce beam instabilities, thus reducing the machines performance and limiting the maximum stored current. It is therefore very important to be able to predict these effects and to study in detail potential solutions to counteract them. In this paper the resistive wall and some other important geometrical sources of impedance for the FCC electron-positron accelerator are identified and evaluated, and their impact on the beam dynamics, which could lead to unwanted instabilities, is discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT3AH1
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WET3BH1	Improvement of Efficiency of Klystron to Apply the CPD Method	ion, klystron, electron, cavity	192
	K. Watanabe KEK, Ibaraki, Japan
	A high power RF system for the particle accelerators needs large electrical power in the operation. An improvement of efficiency is also always required as a technology component for the energy saving. To improve efficiency of a high-power source, the CPD (Collector Potential Depression) method already was applied a Gyrotron to recovery the electrical energy form the collector loss. The CPD is an energy-saving scheme that recovers the kinetic energy of the spent electrons after generating rf power. A CPD klystron (E37703 CPD) was fabricated at 2013, to recycle an existing klystron of Toshiba E3786. The purpose of our study is to demonstrate the proof-of-principle of the CPD method to apply a klystron. A plane of R&D of CPD klystron at KEK will be reported in this meeting.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-WET3BH1
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Paper

Title

Other Keywords

Page

MOOTH1

Overview of High Energy e⁺e⁻ Factories

ion, dynamic-aperture, sextupole, collider

1

K. Oide
KEK, Ibaraki, Japan

Designs of e⁺e⁻ colliders from the Z-pole and above are introduced. Two projects, CEPC and FCC-ee, are discussed. If we compare their schemes, a partial double ring (CEPC) and a full double ring (FCC-ee), find several important differences that affect the performance. On the other hand, there are a number of similarities in both designs, such as the crab-waist scheme, crossing angle, optimization of the dynamic aperture, etc.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-MOOTH1

Export •

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

TUT1AH2

Design of Interaction Region and MDI at CEPC

ion, detector, background, solenoid

53

Q.L. Xiu, J. Gao, X.C. Lou, B. Sha, D. Wang, Y. Wang, H. Zhu
IHEP, Bejing, People's Republic of China

The CEPC is a proposed circular electron positron collider to study the Higgs boson more accurately. To make sure the machine works well, the compatibility of the machine and the detector is very important. In order to make sure the detector is compatible with the machine, two kinds of problems must be resolved. Firstly, the mutual influence between the machine and the detector must be well studied. It includes the beam induced background, the influence on the beam status from the detector solenoid field and so on. Secondly, the interface between the machine and the detector must be well designed, including the mechanical supporting, the procedure to assemble the interaction region and so on. In this talk, we present the recent progress of the IR design and MDI study of CEPC. The dominant sources of beam induced background have been studied and some preliminary results are obtained. The compensating solenoid and anti-solenoid will be used to suppress the influence on the beam status from the detector solenoid. A global design of the interaction region is undergoing to balance the conflict of performance between the machine and the detector.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT1AH2

Export •

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

TUT3AH1

Collective Effects Issues for FCC-ee

ion, impedance, wakefield, synchrotron

100

M. Migliorati
University of Rome La Sapienza, Rome, Italy
E. Belli
CERN, Geneva, Switzerland
G. Castorina, B. Spataro, M. Zobov
INFN/LNF, Frascati (Roma), Italy
S. Persichelli
LBNL, Berkeley, California, USA

The Future Circular Collider study, hosted by CERN to design post-LHC particle accelerator options in a worldwide context, represents a great challenge under several aspects, which require R&D on beam dynamics and new technologies. One very critical point is represented by collective effects, generated by the interaction of the beam with self-induced electromagnetic fields, called wake fields, which could produce beam instabilities, thus reducing the machines performance and limiting the maximum stored current. It is therefore very important to be able to predict these effects and to study in detail potential solutions to counteract them. In this paper the resistive wall and some other important geometrical sources of impedance for the FCC electron-positron accelerator are identified and evaluated, and their impact on the beam dynamics, which could lead to unwanted instabilities, is discussed.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-TUT3AH1

Export •

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

WET3BH1

Improvement of Efficiency of Klystron to Apply the CPD Method

ion, klystron, electron, cavity

192

K. Watanabe
KEK, Ibaraki, Japan

A high power RF system for the particle accelerators needs large electrical power in the operation. An improvement of efficiency is also always required as a technology component for the energy saving. To improve efficiency of a high-power source, the CPD (Collector Potential Depression) method already was applied a Gyrotron to recovery the electrical energy form the collector loss. The CPD is an energy-saving scheme that recovers the kinetic energy of the spent electrons after generating rf power. A CPD klystron (E37703 CPD) was fabricated at 2013, to recycle an existing klystron of Toshiba E3786. The purpose of our study is to demonstrate the proof-of-principle of the CPD method to apply a klystron. A plane of R&D of CPD klystron at KEK will be reported in this meeting.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2016-WET3BH1

Export •

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