U.S. Department of EnergyOffice of Scientific and Technical Information
Studies of beam induced dipole-mode signals in accelerating structures at the SLC
Abstract
Beam emittance dilution by self induced transverse fields (wakefields) in accelerating structures is a key problem in linear accelerators. To minimize the wakefield effects the beam trajectory must be precisely centered within the structures. An efficient way to achieve this is to detect beam induced microwave signals in the lowest dipole mode band and to steer the beam by minimizing these signals. This paper briefly covers some experiences from SLC S-band structures, but mainly concentrates on results of a wakefield instrumentation scheme applied to a NLC prototype X-band structure and tested with beam in the SLC linac. A beam based in-situ structure straightness measurement is shown as well as results of beam steering experiments based on phase and amplitude detection of two separated modes in the structure. After centering the beam the reduction of the wakefield was demonstrated independently by probing it with a test bunch that is deflected by the residual wakefield at a short distance behind the drive bunch.
- Authors:
- Publication Date:
- Research Org.:
- Stanford Univ., Stanford Linear Accelerator Center, CA (United States)
- Sponsoring Org.:
- USDOE Office of Energy Research, Washington, DC (United States)
- OSTI Identifier:
- 335185
- Report Number(s):
- SLAC-PUB-7557; CONF-970503-
ON: DE99002441; TRN: 99:005036
- DOE Contract Number:
- AC03-76SF00515
- Resource Type:
- Conference
- Resource Relation:
- Conference: 17. IEEE particle accelerator conference, Vancouver (Canada), 12-16 May 1997; Other Information: PBD: Jun 1997
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; BEAM EMITTANCE; STANFORD LINEAR COLLIDER; ELECTROMAGNETIC FIELDS; BEAM MONITORS; BEAM DYNAMICS; BEAM POSITION
Citation Formats
Seidel, M. Studies of beam induced dipole-mode signals in accelerating structures at the SLC. United States: N. p., 1997.
Web.
Seidel, M. Studies of beam induced dipole-mode signals in accelerating structures at the SLC. United States.
Seidel, M. 1997.
"Studies of beam induced dipole-mode signals in accelerating structures at the SLC". United States. https://www.osti.gov/servlets/purl/335185.
@article{osti_335185,
title = {Studies of beam induced dipole-mode signals in accelerating structures at the SLC},
author = {Seidel, M},
abstractNote = {Beam emittance dilution by self induced transverse fields (wakefields) in accelerating structures is a key problem in linear accelerators. To minimize the wakefield effects the beam trajectory must be precisely centered within the structures. An efficient way to achieve this is to detect beam induced microwave signals in the lowest dipole mode band and to steer the beam by minimizing these signals. This paper briefly covers some experiences from SLC S-band structures, but mainly concentrates on results of a wakefield instrumentation scheme applied to a NLC prototype X-band structure and tested with beam in the SLC linac. A beam based in-situ structure straightness measurement is shown as well as results of beam steering experiments based on phase and amplitude detection of two separated modes in the structure. After centering the beam the reduction of the wakefield was demonstrated independently by probing it with a test bunch that is deflected by the residual wakefield at a short distance behind the drive bunch.},
doi = {},
url = {https://www.osti.gov/biblio/335185},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jun 01 00:00:00 EDT 1997},
month = {Sun Jun 01 00:00:00 EDT 1997}
}