Design Issues for the ILC Positron Source
Design Issues for the ILC Positron Source

Author: J. Sheppard

Publisher:

Published: 2006

Total Pages: 3

ISBN-13:

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A positron source for the International Linear Collider (ILC) can be designed using either a multi-GeV electron beam or a multi-MeV photon beam impinging on a metal target. The major design issues are: choice of drive beam and its generation, choice of target material, the target station, positron capture section, target vault and beam transport to the ILC positron damping ring complex. This paper lists the ILC positron source requirements and their implications for the design of the positron source. A conceptual design for the ILC is expected to be finished in the next two years. With emphasis on this timescale, source design issues and possible solutions are discussed.

Heat Deposition in Positron Sources for ILC.
Heat Deposition in Positron Sources for ILC.

Author: J. Sheppard

Publisher:

Published: 2006

Total Pages: 3

ISBN-13:

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In the International Linear Collider (ILC) positron source, multi-GeV electrons or multi-MeV photons impinge on a metal target to produce the needed positrons in the resulting electromagnetic showers. The incoming beam power is hundreds of kilowatts. Various computer programs -- such as FLUKA or MARS -- can calculate how the incoming beam showers in the target and can track the particle showers through the positron source system. Most of the incoming energy ends up as heat in the various positron source elements. This paper presents results from such calculations and their impact on the design of a positron source for the ILC.

Polarized Positron 2011
Polarized Positron 2011

Author: Wei Gai

Publisher: World Scientific

Published: 2012

Total Pages: 167

ISBN-13: 9814401048

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This volume is a collection of the contributions to the 6th Annual Workshop on Polarized Positron held in China. It provides updated information on polarized positron source R&D efforts for future high energy linear colliders and other research activities related to the polarized positron studies.The topics covered include: positron beams for linear colliders, but not limited to it, with the main items listed below: Polarized gamma ray generation High degree polarized positron generation from Compton scattering both ring and linac based High degree polarized positron generation from undulator radiation Stacking and accumulation of the polarized beam from Compton regime Polarized beam transport, control and acceleration Channelling radiation and applications Physics applications of polarized positrons Various high intensity positron sources (include conventional) For other future colliders (SuperB, for example) Positron generation target issues Physics applications of high quality X-rays and gamma-rays Polarimetry at the e+ source The positron capture section and the photon collimation Review the activities of the OC ILCOCoCLIC e+ generationOCO working group for all schemes Status of the CDR for CLIC and TDR for ILC Polarized electron sources"

Polarized Positron 2011 - Proceedings Of The 6th Annual Workshop
Polarized Positron 2011 - Proceedings Of The 6th Annual Workshop

Author: Wei Gai

Publisher: World Scientific

Published: 2012-10-05

Total Pages: 167

ISBN-13: 9814401056

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This volume is a collection of the contributions to the 6th Annual Workshop on Polarized Positron held in China. It provides updated information on polarized positron source R&D efforts for future high energy linear colliders and other research activities related to the polarized positron studies.The topics covered include: positron beams for linear colliders, but not limited to it, with the main items listed below:

Recent Developments in the Design of the NLC Positron Source
Recent Developments in the Design of the NLC Positron Source

Author:

Publisher:

Published: 1999

Total Pages:

ISBN-13:

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Recent developments in the design of the Next Linear Collider (NLC) positron source based on updated beam parameters are described. The unpolarized NLC positron source [1,2] consists of a dedicated 6.2 GeV S-band electron accelerator, a high-Z positron production target, a capture system and an L-band positron linac. The 1998 failure of the SLC target, which is currently under investigation, may lead to a variation of the target design. Progress towards a polarized positron source is also presented. A moderately polarized positron beam colliding with a highly polarized electron beam results in an effective polarization large enough to explore new physics at NLC. One of the schemes towards a polarized positron source incorporates a polarized electron source, a 50 MeV electron accelerator, a thin target for positron production and a new capture system optimized for high-energy, small angular-divergence positrons. The yield for such a process, checked using the EGS4 code, is of the order of 10−3. The EGS4 code has being enhanced to include the effect of polarization in bremsstrahlung and pair-production process.