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Title: Single-shot wakefield measurement system

Abstract

A new experimental technique for the accurate measurements of wakefields is presented. Knowledge of wakefields is required for many applications ranging from the suppression of wakefields that arise from geometrical discontinuities to the enhancement of wakefields in structure and plasma based wakefield accelerators. In the past, direct measurements of wakefields were done with the drive-witness technique wherein the delay of a short witness beam trailing collinearly behind a high-charge drive beam is scanned over multiple shots and the wakefield is inferred from the energy spectrum of the witness beam. That technique is limited by shot-to-shot jitter, overlap of the drive and witness energy spectrum and the loss of all time-domain information. In this paper, we describe a new technique that overcomes these limitations by measuring the longitudinal phase space of a long witness beam and the drive beam in a single shot. We conclude by presenting experimental results to demonstrate its feasibility using a dielectric structure wakefield accelerator.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1457205
Alternate Identifier(s):
OSTI ID: 1488568
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Name: Physical Review Accelerators and Beams Journal Volume: 21 Journal Issue: 6; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Gao, Qiang, Shi, Jiaru, Chen, Huaibi, Ha, Gwanghui, Power, John G., Conde, Manoel, and Gai, Wei. Single-shot wakefield measurement system. United States: N. p., 2018. Web. doi:10.1103/PhysRevAccelBeams.21.062801.
Gao, Qiang, Shi, Jiaru, Chen, Huaibi, Ha, Gwanghui, Power, John G., Conde, Manoel, & Gai, Wei. Single-shot wakefield measurement system. United States. doi:10.1103/PhysRevAccelBeams.21.062801.
Gao, Qiang, Shi, Jiaru, Chen, Huaibi, Ha, Gwanghui, Power, John G., Conde, Manoel, and Gai, Wei. Tue . "Single-shot wakefield measurement system". United States. doi:10.1103/PhysRevAccelBeams.21.062801.
@article{osti_1457205,
title = {Single-shot wakefield measurement system},
author = {Gao, Qiang and Shi, Jiaru and Chen, Huaibi and Ha, Gwanghui and Power, John G. and Conde, Manoel and Gai, Wei},
abstractNote = {A new experimental technique for the accurate measurements of wakefields is presented. Knowledge of wakefields is required for many applications ranging from the suppression of wakefields that arise from geometrical discontinuities to the enhancement of wakefields in structure and plasma based wakefield accelerators. In the past, direct measurements of wakefields were done with the drive-witness technique wherein the delay of a short witness beam trailing collinearly behind a high-charge drive beam is scanned over multiple shots and the wakefield is inferred from the energy spectrum of the witness beam. That technique is limited by shot-to-shot jitter, overlap of the drive and witness energy spectrum and the loss of all time-domain information. In this paper, we describe a new technique that overcomes these limitations by measuring the longitudinal phase space of a long witness beam and the drive beam in a single shot. We conclude by presenting experimental results to demonstrate its feasibility using a dielectric structure wakefield accelerator.},
doi = {10.1103/PhysRevAccelBeams.21.062801},
journal = {Physical Review Accelerators and Beams},
number = 6,
volume = 21,
place = {United States},
year = {2018},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevAccelBeams.21.062801

Citation Metrics:
Cited by: 1 work
Citation information provided by
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Figures / Tables:

FIG. 1. FIG. 1.: Illustration of the interaction between drive and long witness. The solid blue line indicates the bunch current profile, the dashed red line is its wakefield. The navy blue/sky blue dots represent the electrons inside the drive bunch with/without wakefield, the cardinal/light red dots are the electron inside amore » long witness bunch with/without wakefield.« less

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    Single Shot Characterization of High Transformer Ratio Wakefields in Nonlinear Plasma Acceleration
    journal, January 2020