• Corpus ID: 221802731

Estimating chromatic properties of electron beams from frequency analysis of turn-by-turn beam position data

  title={Estimating chromatic properties of electron beams from frequency analysis of turn-by-turn beam position data},
  author={Panagiotis Zisopoulos and Y. Papaphilippou},
  journal={arXiv: Accelerator Physics},
A method to estimate linear chromaticity, RMS energy spread, and chromatic beta-beating, directly from turn-by-turn beam position data in a circular electron accelerator, is presented. This technique is based on frequency analysis of a transversely excited beam, in the presence of finite chromaticity. Due to the turn-by-turn chromatic modulation of the beam's envelope, betatron sidebands appear around the main frequency of the Fourier spectra. By determining the amplitude of both sidebands… 



The measurement of chromaticity via a head-tail phase shift

The most common method of measuring the chromaticities of a circular machine is to measure the betatron tune as a function of the beam energy and then to calculate the chromaticity from the resulting

Refined betatron tune measurements by mixing beam position data

The measurement of the betatron tunes in a circular accelerator is of paramount importance due to their impact on beam dynamics. The resolution of the these measurements, when using turn by turn


Measurements of chromatic beta-beating were carried out for the first time in the RHIC accelerator during Run 2009. The analysis package developed for the LHC was used to extract the off-momentum

Precise measurement of the betatron tune

In circular accelerators, sophisticated algorithms for frequency analysis can provide very precise estimates of the betatron tune from a relatively short sequence of turn-by-turn measurements of the

Determination of chromaticity by the measurement of head-tail phase shifts: Simulations, results from the SPS and a robustness study for the LHC

The feasibility of chromaticity determination by measuring head-tail phase shifts has been shown both in the CERN-SPS and at HERA (DESY). These measurements, although verifying the technique, also

Frequency Maps Analysis of Tracking and Experimental Data for the SLS Storage Ring

Frequency Maps Analysis (FMA) has been widely used in beam dynamics in order to study dynamical aspects of the particles linear and non-linear motion, such as optics functions distortion, coupling,

Energy spread extraction and processing from the kicked beam centroid motion in electron storage rings

The energy spread of the electron beam in the storage ring is one of the most important parameters that define the linear and nonlinear beam dynamics in the storage ring. It is especially important

Tune and chromaticity diagnostics

Abstract Tune and chromaticity, the oscillation frequency of the transverse motion and its dependence on the particle’s momentum, are important observables that are used to estimate, measure, and

Model Independent Analysis of Beam Centroid Dynamics in Accelerators

Fundamental issues in Beam-Position-Monitor (BPM)-based beam dynamics observations are studied in this dissertation. The major topic is the Model-Independent Analysis (MIA) of beam centroid dynamics.