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Title: Preliminary tests of the optical diagnostics for the APS low-energy undulator test line particle beam

Abstract

An alternate configuration of the injector linacs (low-energy undulator test line) at the Advanced Photon Source (APS) combined with a thermionic rf gun is projected to provide low, normalized emittance electron beams ({var_epsilon}{sub n} {approximately} 5% mm mrad). By using the electron linac and the inline, rephased positron linac, beam energies from 250 to 650 MeV with bunch lengths sigma {sigma}{sub t} {approximately} 1 ps are possible. In order to characterize such beams, the present intercepting Chromox screens with limited spatial resolution and temporal response are being complemented by optical transition radiation (OTR) screens at selected positions in the beamline to provide sub-100 {micro}m spatial resolution and sub-ps response times. Initial OTR images have been obtained from a beam at 650 MeV using the conventional thermionic gun to generate a 30-ns-long macropulse. Micropulse bunch lengths as short as 3 to 4 ps ({sigma}) were also measured using a C5680 streak camera. Additionally, coherent transition radiation (CTR) and diffraction radiation (DR) based techniques will be evaluated. These beam characterizations will support self-amplified spontaneous emission (SASE) scaling experiments.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab., Advanced Photon Source, IL (United States)
Sponsoring Org.:
USDOE Office of Energy Research, Washington, DC (United States)
OSTI Identifier:
634092
Report Number(s):
ANL/ASD/CP-93265; CONF-970885-
ON: DE97054213; TRN: 98:009825
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Technical Report
Resource Relation:
Conference: FEL `97: international free electron laser conference and 4. free electron laser users` workshop, Beijing (China), 18-22 Aug 1997; Other Information: PBD: Aug 1997
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM INJECTION; ADVANCED PHOTON SOURCE; DIAGNOSTIC TECHNIQUES; BEAM MONITORING; ELECTRON GUNS; LINEAR ACCELERATORS; ELECTRON BEAMS; EXPERIMENTAL DATA; PERFORMANCE TESTING

Citation Formats

Lumpkin, A H, Berg, W J, Yang, B X, and White, M. Preliminary tests of the optical diagnostics for the APS low-energy undulator test line particle beam. United States: N. p., 1997. Web. doi:10.2172/634092.
Lumpkin, A H, Berg, W J, Yang, B X, & White, M. Preliminary tests of the optical diagnostics for the APS low-energy undulator test line particle beam. United States. https://doi.org/10.2172/634092
Lumpkin, A H, Berg, W J, Yang, B X, and White, M. 1997. "Preliminary tests of the optical diagnostics for the APS low-energy undulator test line particle beam". United States. https://doi.org/10.2172/634092. https://www.osti.gov/servlets/purl/634092.
@article{osti_634092,
title = {Preliminary tests of the optical diagnostics for the APS low-energy undulator test line particle beam},
author = {Lumpkin, A H and Berg, W J and Yang, B X and White, M},
abstractNote = {An alternate configuration of the injector linacs (low-energy undulator test line) at the Advanced Photon Source (APS) combined with a thermionic rf gun is projected to provide low, normalized emittance electron beams ({var_epsilon}{sub n} {approximately} 5% mm mrad). By using the electron linac and the inline, rephased positron linac, beam energies from 250 to 650 MeV with bunch lengths sigma {sigma}{sub t} {approximately} 1 ps are possible. In order to characterize such beams, the present intercepting Chromox screens with limited spatial resolution and temporal response are being complemented by optical transition radiation (OTR) screens at selected positions in the beamline to provide sub-100 {micro}m spatial resolution and sub-ps response times. Initial OTR images have been obtained from a beam at 650 MeV using the conventional thermionic gun to generate a 30-ns-long macropulse. Micropulse bunch lengths as short as 3 to 4 ps ({sigma}) were also measured using a C5680 streak camera. Additionally, coherent transition radiation (CTR) and diffraction radiation (DR) based techniques will be evaluated. These beam characterizations will support self-amplified spontaneous emission (SASE) scaling experiments.},
doi = {10.2172/634092},
url = {https://www.osti.gov/biblio/634092}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Aug 01 00:00:00 EDT 1997},
month = {Fri Aug 01 00:00:00 EDT 1997}
}