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Title: Four-dimensional phase space tomography from one-dimensional measurements of a hadron beam

Journal Article · · Physical Review Accelerators and Beams
ORCiD logo [1]
  1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
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In this paper, we use one-dimensional measurements to infer the four-dimensional phase space density of an accumulated proton beam in the Spallation Neutron Source (SNS) accelerator. The reconstruction was performed by maximizing the distribution’s entropy subject to the measurement constraints and thus represents the most conservative inference from the data. The reconstructed distribution reproduces the measured profiles down to the noise level, and simulations indicate that the problem is reasonably well constrained. Similar measurements could serve as benchmarks for beam dynamics simulations in the SNS or hadron accelerators.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
2483853
Journal Information:
Physical Review Accelerators and Beams, Journal Name: Physical Review Accelerators and Beams Journal Issue: 12 Vol. 27; ISSN 2469-9888
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (19)

A method for probing machine optics by constructing transverse real space beam distributions using Beam Position Monitors
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journal November 2008
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journal November 2014
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The Particle Accelerator Simulation Code PyORBIT journal January 2015
An adaptive approach to machine learning for compact particle accelerators journal September 2021
A study of the maximum entropy technique for phase space tomography journal February 2013
Injection of a self-consistent beam with linear space charge force into a ring journal December 2018
Transverse phase space characterization in an accelerator test facility journal March 2020
Laser-assisted charge exchange as an atomic yardstick for proton beam energy measurement and phase probe calibration journal March 2021
4D transverse phase space tomography of an operational hydrogen ion beam via noninvasive 2D measurements using laser wires journal April 2022
Transverse phase space tomography in an accelerator test facility using image compression and machine learning journal December 2022
5D tomographic phase-space reconstruction of particle bunches journal July 2024
First Six Dimensional Phase Space Measurement of an Accelerator Beam journal August 2018
Phase Space Reconstruction from Accelerator Beam Measurements Using Neural Networks and Differentiable Simulations journal April 2023
High-dimensional maximum-entropy phase space tomography using normalizing flows journal August 2024
Four-dimensional transverse beam matrix measurement using the multiple-quadrupole scan technique journal May 2014
Four-Dimensional Beam Tomography journal January 1981
Open XAL Status Report 2022 conferencepaper January 2022

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