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Title: A Design Report of the Baseline for PEP-X: an Ultra-Low Emittance Storage Ring

Abstract

Over the past year, we have worked out a baseline design for PEP-X, as an ultra-low emittance storage ring that could reside in the existing 2.2-km PEPII tunnel. The design features a hybrid lattice with double bend achromat (DBA) cells in two arcs and theoretical minimum emittance (TME) cells in the remaining four arcs. Damping wigglers are used to reduce the horizontal emittance to 86 pm-rad at zero current for a 4.5 GeV electron beam. At a design current of 1.5 A, the horizontal emittance increases, due to intrabeam scattering, to 164 pm-rad when the vertical emittance is maintained at a diffraction limited 8 pm-rad. The baseline design will produce photon beams achieving a brightness of 10{sup 22} (ph/s/mm{sup 2}/mrad{sup 2}/0.1% BW) at 10 keV in a 3.5-m conventional planar undulator. Our study shows that an optimized lattice has adequate dynamic aperture, while accommodating a conventional off-axis injection system. In this report, we present the results of study, including the lattice properties, nonlinear dynamics, intra-beam scattering and Touschek lifetime, RF system, and collective instabilities. Finally, we discuss the possibility of partial lasing at soft X-ray wavelengths using a long undulator in a straight section.

Authors:
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Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
981385
Report Number(s):
SLAC-PUB-13999
TRN: US1003839
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BRIGHTNESS; DAMPING; DESIGN; DIFFRACTION; ELECTRON BEAMS; LIFETIME; PHOTON BEAMS; RF SYSTEMS; SAFETY REPORTS; SCATTERING; STORAGE RINGS; WAVELENGTHS; WIGGLER MAGNETS; Accelerators,ACCPHY, SYNCHRAD

Citation Formats

Bane, Karl, Bertsche, Kirk, Cai, Yunhai, Chao, Alex, Corbett, Willian, Fox, John, Hettel, Robert, Huang, Xiaobiao, Huang, Zhirong, Ng, Cho-Kuen, Nosochkov, Yuri, Novokhatski, Sasha, Radedeau, Thomas, Raubenheimer, Tor, Rivetta, Claudio, Safranek, James, Seeman, John, Stohr, Joachim, Stupakov, Gennady, Wang, Lanfa, Wang, Min-Huey, and /SLAC. A Design Report of the Baseline for PEP-X: an Ultra-Low Emittance Storage Ring. United States: N. p., 2010. Web. doi:10.2172/981385.
Bane, Karl, Bertsche, Kirk, Cai, Yunhai, Chao, Alex, Corbett, Willian, Fox, John, Hettel, Robert, Huang, Xiaobiao, Huang, Zhirong, Ng, Cho-Kuen, Nosochkov, Yuri, Novokhatski, Sasha, Radedeau, Thomas, Raubenheimer, Tor, Rivetta, Claudio, Safranek, James, Seeman, John, Stohr, Joachim, Stupakov, Gennady, Wang, Lanfa, Wang, Min-Huey, & /SLAC. A Design Report of the Baseline for PEP-X: an Ultra-Low Emittance Storage Ring. United States. https://doi.org/10.2172/981385
Bane, Karl, Bertsche, Kirk, Cai, Yunhai, Chao, Alex, Corbett, Willian, Fox, John, Hettel, Robert, Huang, Xiaobiao, Huang, Zhirong, Ng, Cho-Kuen, Nosochkov, Yuri, Novokhatski, Sasha, Radedeau, Thomas, Raubenheimer, Tor, Rivetta, Claudio, Safranek, James, Seeman, John, Stohr, Joachim, Stupakov, Gennady, Wang, Lanfa, Wang, Min-Huey, and /SLAC. Wed . "A Design Report of the Baseline for PEP-X: an Ultra-Low Emittance Storage Ring". United States. https://doi.org/10.2172/981385. https://www.osti.gov/servlets/purl/981385.
@article{osti_981385,
title = {A Design Report of the Baseline for PEP-X: an Ultra-Low Emittance Storage Ring},
author = {Bane, Karl and Bertsche, Kirk and Cai, Yunhai and Chao, Alex and Corbett, Willian and Fox, John and Hettel, Robert and Huang, Xiaobiao and Huang, Zhirong and Ng, Cho-Kuen and Nosochkov, Yuri and Novokhatski, Sasha and Radedeau, Thomas and Raubenheimer, Tor and Rivetta, Claudio and Safranek, James and Seeman, John and Stohr, Joachim and Stupakov, Gennady and Wang, Lanfa and Wang, Min-Huey and /SLAC},
abstractNote = {Over the past year, we have worked out a baseline design for PEP-X, as an ultra-low emittance storage ring that could reside in the existing 2.2-km PEPII tunnel. The design features a hybrid lattice with double bend achromat (DBA) cells in two arcs and theoretical minimum emittance (TME) cells in the remaining four arcs. Damping wigglers are used to reduce the horizontal emittance to 86 pm-rad at zero current for a 4.5 GeV electron beam. At a design current of 1.5 A, the horizontal emittance increases, due to intrabeam scattering, to 164 pm-rad when the vertical emittance is maintained at a diffraction limited 8 pm-rad. The baseline design will produce photon beams achieving a brightness of 10{sup 22} (ph/s/mm{sup 2}/mrad{sup 2}/0.1% BW) at 10 keV in a 3.5-m conventional planar undulator. Our study shows that an optimized lattice has adequate dynamic aperture, while accommodating a conventional off-axis injection system. In this report, we present the results of study, including the lattice properties, nonlinear dynamics, intra-beam scattering and Touschek lifetime, RF system, and collective instabilities. Finally, we discuss the possibility of partial lasing at soft X-ray wavelengths using a long undulator in a straight section.},
doi = {10.2172/981385},
url = {https://www.osti.gov/biblio/981385}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {6}
}