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Title: Ferrite HOM Absorber for the RHIC ERL

Abstract

A superconducting Energy Recovery Linac is under construction at Brookhaven National Laboratory to serve as test bed for RHIC upgrades. The damping of higher-order modes in the superconducting five-cell cavity for the Energy-Recovery linac at RHIC is performed exclusively by two ferrite absorbers. The ferrite properties have been measured in ferrite-loaded pill box cavities resulting in the permeability values given by a first-order Debye model for the tiled absorber structure and an equivalent permeability value for computer simulations with solid ring dampers. Measured and simulated results for the higher-order modes in the prototype copper cavity are discussed. First room-temperature measurements of the finished niobium cavity are presented which confirm the effective damping of higher-order modes in the ERL. by the ferrite absorbers.

Authors:
; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
939995
Report Number(s):
BNL-81608-2008-IR
R&D Project: 18054; KB0202011; TRN: US0807101
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BNL; CAVITIES; COMPUTERIZED SIMULATION; CONSTRUCTION; COPPER; DAMPING; ENERGY RECOVERY; FERRITE; LINEAR ACCELERATORS; NIOBIUM; PERMEABILITY

Citation Formats

Hahn,H., Choi, E.M., and Hammons, L.. Ferrite HOM Absorber for the RHIC ERL. United States: N. p., 2008. Web. doi:10.2172/939995.
Hahn,H., Choi, E.M., & Hammons, L.. Ferrite HOM Absorber for the RHIC ERL. United States. doi:10.2172/939995.
Hahn,H., Choi, E.M., and Hammons, L.. Wed . "Ferrite HOM Absorber for the RHIC ERL". United States. doi:10.2172/939995. https://www.osti.gov/servlets/purl/939995.
@article{osti_939995,
title = {Ferrite HOM Absorber for the RHIC ERL},
author = {Hahn,H. and Choi, E.M. and Hammons, L.},
abstractNote = {A superconducting Energy Recovery Linac is under construction at Brookhaven National Laboratory to serve as test bed for RHIC upgrades. The damping of higher-order modes in the superconducting five-cell cavity for the Energy-Recovery linac at RHIC is performed exclusively by two ferrite absorbers. The ferrite properties have been measured in ferrite-loaded pill box cavities resulting in the permeability values given by a first-order Debye model for the tiled absorber structure and an equivalent permeability value for computer simulations with solid ring dampers. Measured and simulated results for the higher-order modes in the prototype copper cavity are discussed. First room-temperature measurements of the finished niobium cavity are presented which confirm the effective damping of higher-order modes in the ERL. by the ferrite absorbers.},
doi = {10.2172/939995},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Oct 01 00:00:00 EDT 2008},
month = {Wed Oct 01 00:00:00 EDT 2008}
}

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