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Title: BEAM ENERGY LOSS VERSUS VELOCITY IN SC CAVITIES FOR SNS LINAC

Abstract

No abstract prepared.

Authors:
Publication Date:
Research Org.:
Los Alamos National Lab., NM (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
786214
Report Number(s):
LA-UR-99-6187
TRN: US0111283
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Nov 1999
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; LINEAR ACCELERATORS; SUPERCONDUCTING CAVITY RESONATORS; ENERGY LOSSES; BEAM DYNAMICS; NEUTRON SOURCES; SPALLATION

Citation Formats

S. S. KURENNOY. BEAM ENERGY LOSS VERSUS VELOCITY IN SC CAVITIES FOR SNS LINAC. United States: N. p., 1999. Web.
S. S. KURENNOY. BEAM ENERGY LOSS VERSUS VELOCITY IN SC CAVITIES FOR SNS LINAC. United States.
S. S. KURENNOY. 1999. "BEAM ENERGY LOSS VERSUS VELOCITY IN SC CAVITIES FOR SNS LINAC". United States. doi:. https://www.osti.gov/servlets/purl/786214.
@article{osti_786214,
title = {BEAM ENERGY LOSS VERSUS VELOCITY IN SC CAVITIES FOR SNS LINAC},
author = {S. S. KURENNOY},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1999,
month =
}

Conference:
Other availability
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  • No abstract prepared.
  • In the low-energy part of the Project X H-linac three families of 325 MHz SC single spoke cavities will be used, having {beta} = 0.11, 0.21 and 0.4. Single spoke cavity was selected for the linac because of higher r/Q. Results of optimization of all cavities are presented. Results of the beam dynamics optimization for initial stage of the linac with beta=0.11 single spoke cavity are presented at poster MOPEC082 (this conference).
  • Velocity-of-light, multi-spoke cavities are being proposed to accelerate electrons in a compact light-source. There are strict requirements on the beam quality which require that the linac have only small non-uniformities in the accelerating field. Beam dynamics simulations have uncovered varying levels of focusing and defocusing in the proposed cavities, which is dependent on the geometry of the spoke in the vicinity of the beam path. Here we present results for the influence different spoke geometries have on the multipole components of the accelerating field and how these components, in turn, impact the simulated beam properties.
  • Good agreement was obtained between computed values and results from a bench measurement technique for the total loss to parasitic modes in several cylindrical cavities with beam ports. The measurement of loss as a function of time within the current pulse also gives results which are in good agreement with computed functions, especially considering the fact that there are questionable points concerning both the theory and the measurement technique. Within measurement errors, there is also agreement in a few cases where a comparison is possible between a bench measurement result and the heating produced directly in a component by themore » SPEAR beam.« less
  • The importance of parasitic mode losses for the design and operation of electron-positron storage rings is now well recognized. These losses at present set the limit on allowable beam current in the SPEAR II ring under some operating conditions. Parasitic mode losses and their potential deleterious effects are a prime consideration in the design of the PEP vacuum chamber. Too high a loss impedance can lead not only to overheating of individual components but to a reduced threshold for bunch instabilities. It is important therefore to have available adequate measurement and computational methods, both as an aid in the designmore » of specific vacuum chamber components and to provide a better understanding of the nature of the loss impedance.« less