Spin transport and polarimetry in the beam delivery system of the international linear collider

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Erscheinungsjahr:

2014

Medientyp:

Text

Schlagworte:

Accelerator modelling and simulations (multi-particle dynamics; singleparticle dynamics)
Instrumentation for particle accelerators and storage rings - high energy (linear accelerators, synchrotrons)

Beschreibung:

Polarised electron and positron beams are key ingredients to the physics programme of future linear colliders. Due to the chiral nature of weak interactions in the Standard Model - and possibly beyond - the knowledge of the luminosity-weighted average beam polarisation at the e+e- interaction point is of similar importance as the knowledge of the luminosity and has to be controlled to permille-level precision in order to fully exploit the physics potential. The current concept to reach this challenging goal combines measurements from Laser-Compton polarimeters before and after the interaction point with measurements at the interaction point. A key element for this enterprise is the understanding of spin-transport effects between the polarimeters and the interaction point as well as collision effects. We show that without collisions, the polarimeters can be cross-calibrated to 0.1 %, and we discuss in detail the impact of collision effects and beam parameters on the polarisation value relevant for the interpretation of the e+e - collision data. © 2014 IOP Publishing Ltd and Sissa Medialab srl.

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Quellsystem:

Forschungsinformationssystem der UHH

Interne Metadaten

Quelldatensatz: oai:www.edit.fis.uni-hamburg.de:publications/e0b65b55-a73d-4546-b0b5-acf04838d1a0