Method and apparatus for recirculation with control of synchrotron radiation
Abstract
A method for controlling beam quality degradation from ISR and CSR and stabilizing the microbunching instability (.mu.BI) in a high brightness electron beam. The method includes providing a super-periodic second order achromat line with each super period being individually linearly achromatic and isochronous, setting individual superperiod tunes to rational fractions of an integer (such as 4.sup.th or 6.sup.th integers), setting individual bend angles to be as small as practical to reduce driving terms due to dispersion and dispersive angle, and setting bend radii as large enough to suppress ISR but not negatively affect the radial dependence of CSR. The method includes setting the structure of the individual superperiods to minimize bend plane beam envelope values in the dipoles to reduce betatron response to a CSR event at a dispersed location, increasing beam angular divergence, and creating dispersion nodes in the dipoles to similarly reduce response to CSR events, and limit R.sub.56 modulation in order to mitigate .mu.BI.
- Inventors:
- Issue Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1279738
- Patent Number(s):
- 9408290
- Application Number:
- 14/526,597
- Assignee:
- JEFFERSON SCIENCE ASSOCIATES, LLC (Newport News, VA)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05H - PLASMA TECHNIQUE
- DOE Contract Number:
- AC05-06OR23177
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2014 Oct 29
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; 42 ENGINEERING
Citation Formats
Douglas, David R., and Tennant, Christopher. Method and apparatus for recirculation with control of synchrotron radiation. United States: N. p., 2016.
Web.
Douglas, David R., & Tennant, Christopher. Method and apparatus for recirculation with control of synchrotron radiation. United States.
Douglas, David R., and Tennant, Christopher. Tue .
"Method and apparatus for recirculation with control of synchrotron radiation". United States. https://www.osti.gov/servlets/purl/1279738.
@article{osti_1279738,
title = {Method and apparatus for recirculation with control of synchrotron radiation},
author = {Douglas, David R. and Tennant, Christopher},
abstractNote = {A method for controlling beam quality degradation from ISR and CSR and stabilizing the microbunching instability (.mu.BI) in a high brightness electron beam. The method includes providing a super-periodic second order achromat line with each super period being individually linearly achromatic and isochronous, setting individual superperiod tunes to rational fractions of an integer (such as 4.sup.th or 6.sup.th integers), setting individual bend angles to be as small as practical to reduce driving terms due to dispersion and dispersive angle, and setting bend radii as large enough to suppress ISR but not negatively affect the radial dependence of CSR. The method includes setting the structure of the individual superperiods to minimize bend plane beam envelope values in the dipoles to reduce betatron response to a CSR event at a dispersed location, increasing beam angular divergence, and creating dispersion nodes in the dipoles to similarly reduce response to CSR events, and limit R.sub.56 modulation in order to mitigate .mu.BI.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 02 00:00:00 EDT 2016},
month = {Tue Aug 02 00:00:00 EDT 2016}
}
Works referenced in this record:
Method of extracting charged particles from accelerator, and accelerator capable of carrying out the method, by shifting particle orbit
patent, February 1994
- Hiramoto, Kazuo; Nishi, Masatsugu; Itano, Akifumi
- US Patent Document 5,285,166
Method of controlling coherent synchroton radiation-driven degradation of beam quality during bunch length compression
patent, July 2012
- Douglas, David R.; Tennant, Christopher
- US Patent Document 8,217,596
Method and apparatus for control of coherent synchrotron radiation effects during recirculation with bunch compression
patent-application, August 2015
- Douglas, David R.; Tennant, Christopher
- US Patent Application 14/526616; 20150228444
Cancellation of Coherent Synchrotron Radiation Kicks with Optics Balance
journal, January 2013
- Di Mitri, S.; Cornacchia, M.; Spampinati, S.
- Physical Review Letters, Vol. 110, Issue 1