| Title |
Measurement of Beam Polarization and Beam Energy in One Device |
| Authors |
- N.Yu. Muchnoi
BINP SB RAS, Novosibirsk, Russia
|
| Abstract |
Electron beam interaction with the monochromatic laser radiation produces scattered photons and electrons due to the Compton effect. Both types of scattered particles carry the information about the polarisation (if any) and the energy of initial electrons in the beam. This report is focused on the properties of the scattered electrons. After a bending magnet these electrons leave the beam and their X-Y space distribution is supposed to be measured by the 2D pixel detector. We show that if the electron beam vertical emittance is sufficiently small, the shape of this distribution is an ellipse. Measurement of the length of the X-axis of this ellipse allow to calibrate accurately the bending field integral seen by the beam. The distribution of the electrons within the ellipse depends on the initial beam polarisation, allowing to measure its degree and direction. So we propose a universal Compton polarimeter with a unique feature of precise calibration of the LEP-style beam energy spectrometer. The approach is thought to be useful for the future high-energy e⁺/e⁻ colliders, while the feasibility tests need to be performed on existing accelerators.
|
| Funding |
Russian Science Foundation N 14-50-00080 |
| Paper |
download WET1H4.PDF [0.909 MB / 5 pages] |
| Export |
download ※ BibTeX
※ LaTeX
※ Text/Word
※ RIS
※ EndNote |
| Conference |
eeFACT2016, Daresbury, UK |
| Series |
ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e^+e^- Colliders (58th) |
| Proceedings |
Link to full eeFACT2016 Proccedings |
| Session |
Beam Instrumentation and Beam Diagnostics |
| Date |
26-Oct-16 09:00–10:20 |
| Main Classification |
Beam instrumentation and beam diagnostics |
| Keywords |
ion, electron, polarization, photon, laser |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Ning Zhao (IHEP, Beijing, China); John Poole (CERN, Geneva, Switzerland); Volker RW Schaa (GSI, Darmstadt, Germany) |
| ISBN |
978-3-95450-187-8 |
| Published |
July 2017 |
| Copyright |
|
