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Title: Exact cancellation of emittance growth due to coupled transverse dynamics in solenoids and rf couplers

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1417222
Grant/Contract Number:
AC02-76SF00515
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 21; Journal Issue: 1; Related Information: CHORUS Timestamp: 2018-01-17 10:04:21; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Dowell, David H., Zhou, Feng, and Schmerge, John. Exact cancellation of emittance growth due to coupled transverse dynamics in solenoids and rf couplers. United States: N. p., 2018. Web. doi:10.1103/PhysRevAccelBeams.21.010101.
Dowell, David H., Zhou, Feng, & Schmerge, John. Exact cancellation of emittance growth due to coupled transverse dynamics in solenoids and rf couplers. United States. doi:10.1103/PhysRevAccelBeams.21.010101.
Dowell, David H., Zhou, Feng, and Schmerge, John. 2018. "Exact cancellation of emittance growth due to coupled transverse dynamics in solenoids and rf couplers". United States. doi:10.1103/PhysRevAccelBeams.21.010101.
@article{osti_1417222,
title = {Exact cancellation of emittance growth due to coupled transverse dynamics in solenoids and rf couplers},
author = {Dowell, David H. and Zhou, Feng and Schmerge, John},
abstractNote = {},
doi = {10.1103/PhysRevAccelBeams.21.010101},
journal = {Physical Review Accelerators and Beams},
number = 1,
volume = 21,
place = {United States},
year = 2018,
month = 1
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevAccelBeams.21.010101

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  • Bent solenoids can transmit charged particle beams while providing momentum dispersion. While less familiar than quadrupole and dipole systems, bent solenoids can produce superficially simple transport lines and large acceptance spectrometers for use at low energies. Design issues such as drift compensation and coupling sections between straight and bent solenoids are identified, and aberrations such as shears produced by perpendicular error fields are discussed. Examples are considered which provide the basis for the design of emittance exchange elements for the cooling system of a muon collider.
  • Transverse emittance growth along the Alvarez DTL section is a major concern with respect to the preservation of beam quality of high current beams at the GSI UNILAC. In order to define measures to reduce this growth appropriated tools to simulate the beam dynamics are indispensable. This paper is about the benchmarking of three beam dynamics simulation codes, i.e. DYNAMION, PARMILA, and PARTRAN against systematic measurements of beam emittances for different machine settings. Experimental set-ups, data reduction, the preparation of the simulations, and the evaluation of the simulations will be described. It was found that the measured 100%-rmsemittances behind themore » DTL exceed the simulated values. Comparing measured 90%-rms-emittances to the simulated 95%-rms-emittances gives fair to good agreement instead. The sum of horizontal and vertical emittances is even described well by the codes as long as experimental 90%-rmsemittances are compared to simulated 95%-rms-emittances. Finally, the successful reduction of transverse emittance growth by systematic beam matching is reported.« less
  • No abstract prepared.
  • Transverse-to-longitudinal emittance exchange has promising applications in various advanced acceleration and light source concepts. A proof-of-principle experiment to demonstrate this phase space manipulation method is currently being planned at the Argonne Wakefield Accelerator. The experiment focuses on exchanging a low longitudinal emittance with a high transverse horizontal emittance and also incorporates room for possible parametric studies e.g. using an incoming flat beam with tunable horizontal emittance. In this paper, we present realistic start-to-end beam dynamics simulation of the scheme, explore the limitations of this phase space exchange.