Refined betatron tune measurements by mixing beam position data
نویسندگان
چکیده
منابع مشابه
Calculation of Nonlinear Tune Shift Using Beam Position Measurement Results
The calculation of the nonlinear tune shift with amplitude based on the results of measurements and the linear lattice information is discussed. The tune shift is calculated based on a set of specific measurements and some extra information which is usually available, namely that about the size and particle distribution in the beam and the linear optics effect on the particles. The method to so...
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A method for measurement of betatron tune without the need for feedback-driven excitation has been developed at COSY. A bandlimited broadband noise source was used for beam excitation. The transverse beam position oscillation was then bunch-synchronously sampled and digitized with a high resolution ADC. The Fourier transform of the acquired data represents immediately the betatron tune. A funct...
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We find the conditions for optimal collimator location by the method of “Lagrange undetermined multipliers”. We give a ‘global’ explanation for the advantage of tune splitting on betatron collimation in terms of the envelope of all possible optimal collimator positions. We make analytic calculations of the maximum amplitude of surviving particles for elliptic and jaw-type collimators at a varie...
متن کاملAlgorithms for a Precise Determination of the Betatron Tune
In circular accelerators the precise knowledge of the betatron tune is of paramount importance both for routine operation and for theoretical investigations. The tune is measured by sampling the transverse position of the beam for N turns and by performing the FFT of the stored data. One can also evaluate it by computing the Average Phase Advance (APA) over N turns. These approaches have an int...
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The Relativistic Heavy Ion Collider (RHIC) provides collisions of the fully stripped gold ions for four experiments. This report shows results from measurements of the betatron functions within the Interaction Regions (IR) as well as in the arcs in both ”blue” and ”yellow” rings. A single quadrupole excitation or the beam position monitors’ RMS. values at injection are used to obtain the betatr...
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ژورنال
عنوان ژورنال: Physical Review Accelerators and Beams
سال: 2019
ISSN: 2469-9888
DOI: 10.1103/physrevaccelbeams.22.071002