IPAC2018 - List of Authors (De Silva, S.U.)

Paper	Title	Page
THPAK070	Coupled Bunch Instability from JLEIC Crab Cavity Higher Order Modes	3392
SUSPF079	use link to see paper's listing under its alternate paper code
	S.I. Sosa Guitron, S.U. De Silva, J.R. Delayen, H. Park ODU, Norfolk, Virginia, USA R. Li, V.S. Morozov, H. Park JLab, Newport News, Virginia, USA
	Particle bunches traveling in a ring can excite wakefields inside any radio-frequency element present. These electromagnetic modes can resonate long enough and interact with subsequent passing bunches. A coherent oscillation between bunches can quickly become an instability and needs to be addressed. The Jefferson Lab electron ion collider has a large 50 mrad crossing angle and thus relies on bunch crabbing to achieve high luminosity. Bunch crabbing is done with compact superconducting rf dipole cavities. We study coupled bunch oscillations driven by the higher order modes of multicell RFD crab cavities under study for JLEIC, we calculate the instability growth time assuming a symmetric beam spectrum, identify the HOMs driving the instability and discuss mitigation measures.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAK070
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPAL067	Room Temperature Measurements of Higher Order Modes for the SPS Prototype RF-Dipole Crabbing Cavity	3805
	S.U. De Silva, J.R. Delayen, H. Park ODU, Norfolk, Virginia, USA P. Berrutti Fermilab, Batavia, Illinois, USA N.A. Huque, H. Park JLab, Newport News, Virginia, USA
	LHC High Luminosity Upgrade will be developing two local crabbing systems to increase the luminosity of the colliding bunches at the ATLAS and CMS experiments. One of the crabbing systems uses the rf-dipole cavity design that will be crabbing the beam in the horizontal plane. The fully integrated crabbing cavity has two higher order mode couplers in damping those excited modes. Currently two sets of HOM couplers have been fabricated at Jefferson Lab for prototyping and testing with the LARP crabbing cavities. This paper presents the measurements of the higher order modes with the prototype HOM couplers carried out at room temperature.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAL067
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

THPAK070

Coupled Bunch Instability from JLEIC Crab Cavity Higher Order Modes

3392

SUSPF079

use link to see paper's listing under its alternate paper code

S.I. Sosa Guitron, S.U. De Silva, J.R. Delayen, H. Park
ODU, Norfolk, Virginia, USA
R. Li, V.S. Morozov, H. Park
JLab, Newport News, Virginia, USA

Particle bunches traveling in a ring can excite wakefields inside any radio-frequency element present. These electromagnetic modes can resonate long enough and interact with subsequent passing bunches. A coherent oscillation between bunches can quickly become an instability and needs to be addressed. The Jefferson Lab electron ion collider has a large 50 mrad crossing angle and thus relies on bunch crabbing to achieve high luminosity. Bunch crabbing is done with compact superconducting rf dipole cavities. We study coupled bunch oscillations driven by the higher order modes of multicell RFD crab cavities under study for JLEIC, we calculate the instability growth time assuming a symmetric beam spectrum, identify the HOMs driving the instability and discuss mitigation measures.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAK070

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPAL067

Room Temperature Measurements of Higher Order Modes for the SPS Prototype RF-Dipole Crabbing Cavity

3805

S.U. De Silva, J.R. Delayen, H. Park
ODU, Norfolk, Virginia, USA
P. Berrutti
Fermilab, Batavia, Illinois, USA
N.A. Huque, H. Park
JLab, Newport News, Virginia, USA

LHC High Luminosity Upgrade will be developing two local crabbing systems to increase the luminosity of the colliding bunches at the ATLAS and CMS experiments. One of the crabbing systems uses the rf-dipole cavity design that will be crabbing the beam in the horizontal plane. The fully integrated crabbing cavity has two higher order mode couplers in damping those excited modes. Currently two sets of HOM couplers have been fabricated at Jefferson Lab for prototyping and testing with the LARP crabbing cavities. This paper presents the measurements of the higher order modes with the prototype HOM couplers carried out at room temperature.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAL067

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)