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Title: High frequency impedance of small angle tapers and collimaters

Abstract

Collimators and transitions in accelerator vacuum chambers often include small-angle tapering to lower the wakefields generated by the beam. While the low-frequency impedance is well described by Yokoya's formula (for axisymmetric geometry), much less is known about the behavior of the impedance in the high-frequency limit. In this paper we develop an analytical approach to the high-frequency regime for round collimators and tapers. Our analytical results are compared with computer simulations using the code ECHO.

Authors:
;
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL) National Synchrotron Light Source
Sponsoring Org.:
DOE - Office Of Science
OSTI Identifier:
1001319
Report Number(s):
BNL-94345-2010-JA
Journal ID: ISSN 1098-4402; XX080B; R&D Project: LS001; KC0401030; TRN: US1100330
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Physical Review Special Topics - Accelerators and Beams
Additional Journal Information:
Journal Volume: 13; Journal Issue: 10; Journal ID: ISSN 1098-4402
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; COLLIMATORS; COMPUTERIZED SIMULATION; GEOMETRY; IMPEDANCE; national synchrotron light source

Citation Formats

Stupakov, G, and Pdobedov, B. High frequency impedance of small angle tapers and collimaters. United States: N. p., 2010. Web. doi:10.1103/PhysRevSTAB.13.104401.
Stupakov, G, & Pdobedov, B. High frequency impedance of small angle tapers and collimaters. United States. https://doi.org/10.1103/PhysRevSTAB.13.104401
Stupakov, G, and Pdobedov, B. Mon . "High frequency impedance of small angle tapers and collimaters". United States. https://doi.org/10.1103/PhysRevSTAB.13.104401.
@article{osti_1001319,
title = {High frequency impedance of small angle tapers and collimaters},
author = {Stupakov, G and Pdobedov, B},
abstractNote = {Collimators and transitions in accelerator vacuum chambers often include small-angle tapering to lower the wakefields generated by the beam. While the low-frequency impedance is well described by Yokoya's formula (for axisymmetric geometry), much less is known about the behavior of the impedance in the high-frequency limit. In this paper we develop an analytical approach to the high-frequency regime for round collimators and tapers. Our analytical results are compared with computer simulations using the code ECHO.},
doi = {10.1103/PhysRevSTAB.13.104401},
url = {https://www.osti.gov/biblio/1001319}, journal = {Physical Review Special Topics - Accelerators and Beams},
issn = {1098-4402},
number = 10,
volume = 13,
place = {United States},
year = {2010},
month = {10}
}