Resonant depolarization at Z and W at FCc-ee

Результат исследования: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

Both future 100 km in circumference electron-positron colliders CEPC and FCC-ee need know beams energies with the extreme precision of 1–2 ppm. This can be done only with the help of Resonant Depolarization (RD) technique. Still, some beam parameters of these machines, like energy spread and damping decrements, are so high near 80 GeV per beam, that it is required special consideration and tricks to overcome the difficulties. The author has written simple spin tracking code, which simulates main features of the RD process in presence of continuous energy diffusion due to synchrotron radiation fluctuations. It was shown by this study, that the applicability of the RD method is limited by the effect of widening of the central and side band peaks of the spin precession spectrum when the synchrotron tune Qs is chosen too low, say below Qs=0.05. In this case spin precession lost its resonant nature due to overlap of the wide central spectrum peak with the nearby synchrotron side bands. Dependencies of the spectrum peaks width from various beam parameters and a new RD-procedure recipe are presented.

Язык оригиналаанглийский
Название основной публикацииeeFACT 2018 - Proceedings of the 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e- Colliders
ИздательJoint Accelerator Conferences Website (JACoW)
Страницы165-168
Число страниц4
ISBN (электронное издание)9783954502165
DOI
СостояниеОпубликовано - 1 фев 2019
Событие62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e� Colliders, eeFACT 2018 - Hong Kong, Китай
Продолжительность: 24 сен 201827 сен 2018

Серия публикаций

НазваниеeeFACT 2018 - Proceedings of the 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e- Colliders

Конференция

Конференция62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e� Colliders, eeFACT 2018
СтранаКитай
ГородHong Kong
Период24.09.201827.09.2018

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