U.S. Department of EnergyOffice of Scientific and Technical Information
Time-resolved imaging for the APS linac beams.
Abstract
The particle-beam imaging diagnostics for the Advanced Photon Source (APS) injector lime have been enhanced by the installation of optical transition radiation (OTR) screens and the use of Ce-doped YAG crystals as beam profile monitors. Both converters have improved spatial resolution and time responses compared to the standard Chromox (Al{sub 2}O{sub 3}:Cr) screens used elsewhere in the linac. These enhancements allow us to address the smaller beam sizes (< 100 {micro}m) and the critical micropulse bunch length of higher brightness gun sources For the Linac macropulse of 30-ns duration composed of 86 micropulses at S-band frequency intervals, only the OTR mechanism is prompt enough to separate individual micropulses and to allow streak camera measurements of the micropulse averaged bunch length. Tests have been performed at 400 to 625 MeV using the gated DC thermionic gun source. Beam sizes less than {sigma}{sub x} = 30 {micro}m have been observed with a micropulse bunch length of {sigma} = 2-3 ps using OTR. First results on the lower-emittance rf thermionic gun are briefly discussed.
- Authors:
- Publication Date:
- Research Org.:
- Argonne National Lab., IL (US)
- Sponsoring Org.:
- US Department of Energy (US)
- OSTI Identifier:
- 10769
- Report Number(s):
- ANL/ASD/CP-96385
TRN: US0103840
- DOE Contract Number:
- W-31109-ENG-38
- Resource Type:
- Conference
- Resource Relation:
- Conference: 19th International Linac Accelerator Conference (Linac '98), Chicago, IL (US), 08/23/1998--08/28/1998; Other Information: PBD: 29 Sep 1998
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; ADVANCED PHOTON SOURCE; BEAM PROFILES; BRIGHTNESS; LINEAR ACCELERATORS; BEAM MONITORS; SPATIAL RESOLUTION; STREAK CAMERAS; TRANSITION RADIATION; DATA ANALYSIS; IMAGE PROCESSING
Citation Formats
Lumpkin, A H. Time-resolved imaging for the APS linac beams.. United States: N. p., 1998.
Web.
Lumpkin, A H. Time-resolved imaging for the APS linac beams.. United States.
Lumpkin, A H. 1998.
"Time-resolved imaging for the APS linac beams.". United States. https://www.osti.gov/servlets/purl/10769.
@article{osti_10769,
title = {Time-resolved imaging for the APS linac beams.},
author = {Lumpkin, A H},
abstractNote = {The particle-beam imaging diagnostics for the Advanced Photon Source (APS) injector lime have been enhanced by the installation of optical transition radiation (OTR) screens and the use of Ce-doped YAG crystals as beam profile monitors. Both converters have improved spatial resolution and time responses compared to the standard Chromox (Al{sub 2}O{sub 3}:Cr) screens used elsewhere in the linac. These enhancements allow us to address the smaller beam sizes (< 100 {micro}m) and the critical micropulse bunch length of higher brightness gun sources For the Linac macropulse of 30-ns duration composed of 86 micropulses at S-band frequency intervals, only the OTR mechanism is prompt enough to separate individual micropulses and to allow streak camera measurements of the micropulse averaged bunch length. Tests have been performed at 400 to 625 MeV using the gated DC thermionic gun source. Beam sizes less than {sigma}{sub x} = 30 {micro}m have been observed with a micropulse bunch length of {sigma} = 2-3 ps using OTR. First results on the lower-emittance rf thermionic gun are briefly discussed.},
doi = {},
url = {https://www.osti.gov/biblio/10769},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 29 00:00:00 EDT 1998},
month = {Tue Sep 29 00:00:00 EDT 1998}
}