Tomographic phase space reconstruction during rebucketing in the Relativistic Heavy Ion Collider

C Montag,N D'Imperio,J Kewisch,R Lee

doi:10.1103/physrevstab.5.082801

C Montag, N D'Imperio + Show 2 more

Open Access

https://doi.org/10.1103/physrevstab.5.082801

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Abstract

Longitudinal phase space tomography has evolved into a powerful diagnostic tool in the particle accelerator domain. A computer code has been developed in order to visualize dynamic effects and measure machine parameters in longitudinal phase space. This code is capable of dealing with turn-by-turn parameter changes, for example, during rf rebucketing when the bunch is rotated in longitudinal phase space to minimize the bunch length. We describe the reconstruction code and show its application as a diagnostic tool for rebucketing in the Relativistic Heavy Ion Collider.

Highlights

The basic idea of tomography is to use a sufficiently large number ofn 2 1͒-dimensional projections of an n-dimensional object to reconstruct the object
In the framework of this paper, we deal only with longitudinal phase space reconstruction, where projections of the bunch are acquired by a wall current monitor (WCM)
This is realized by tracking test particles using known machine and rf parameters

Summary

INTRODUCTION

The basic idea of tomography is to use a sufficiently large number ofn 2 1͒-dimensional projections of an n-dimensional object to reconstruct the object. In the framework of this paper, we deal only with longitudinal phase space reconstruction, where projections of the bunch are acquired by a wall current monitor (WCM). In this case, the phase space dynamics involved is not just a simple rotation of a rigid object due to the intrinsic nonlinearity of longitudinal motion in synchrotrons. The phase space dynamics involved is not just a simple rotation of a rigid object due to the intrinsic nonlinearity of longitudinal motion in synchrotrons To overcome this difficulty, the exact particle dynamics has to be taken into account [1]. This is of special interest during processes that involve multiple rf systems and frequent parameter changes, as they occur, for example, during rebucketing

TOMOGRAPHIC RECONSTRUCTION

Findings

CONCLUSION