Improved calibration of rf cavities for relativistic electron beams: Effects of secondary corrections and experimental verification

Shih, K.; Petrushina, I.; Litvinenko, V.  N.; Pinayev, I.; Ma, J.; Wang, G.; Jing, Y.; Wu, Y.

doi:10.1103/physrevaccelbeams.26.064201

Title: Improved calibration of rf cavities for relativistic electron beams: Effects of secondary corrections and experimental verification

Journal Article · 12 June 2023 · Physical Review Accelerators and Beams

DOI: https://doi.org/10.1103/physrevaccelbeams.26.064201 · OSTI ID:1996208

Shih, K. ^[1]; Petrushina, I. ^[1]; Litvinenko, V. N. ^[2];

^[3]; Ma, J. ^[3]; Wang, G. ^[3]; Jing, Y. ^[3]; Wu, Y. ^[3]

Stony Brook Univ., NY (United States)
Stony Brook Univ., NY (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Brookhaven National Laboratory (BNL), Upton, NY (United States)

In the aspect of longitudinal beam bunching, the bunching strength can be controlled by the rf cavity phase and voltage. However, these machine parameters are different from those that interact with the beam itself. In order to gain control of the beam-cavity interaction, cavity calibration must be performed. Furthermore, it relies on fitting the beam energy gain versus cavity phase to a calibration function. Under the conventional assumption of relativistic beam conditions, the calibration function is a first harmonic sinusoidal function (a sinusoidal function with a period of 2π). However, this expression is insufficient for a high-voltage bunching cavity. Due to beam acceleration inside the cavity, an energy bias and a second harmonic function should be included to modify the conventional calibration function, even for a relativistic electron beam. In this paper, we will derive this modification and provide a comparison to both the Coherent Electron Cooling Experiment and the IMPACT T simulation, respectively.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: SC0012704

OSTI ID:: 1996208

Report Number(s):: BNL-224680-2023-JAAM

Journal Information:: Physical Review Accelerators and Beams, Journal Name: Physical Review Accelerators and Beams Journal Issue: 6 Vol. 26; ISSN 2469-9888

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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