6 citations · 45 across the 21 of their papers we have counts for
8 papers · 1 filter
Beam Coupling Impedance of the LHC TCTP Collimators
Hugo Day, Fritz Caspers, Alessandro Dallocchio +5
As part of an upgrade to the LHC collimation system, 8 TCTP and 1 TCSG collimators are proposed to replace existing collimators in the collimation system. In an effort to review al…
Evaluation of the Beam Coupling Impedance of New Beam Screen Designs for the LHC Injection Kicker Magnets
Hugo Day, Michael Barnes, Fritz Caspers +3
During the 2011 run of the LHC there was a significant measured temperature increase in the LHC Injection Kicker Magnets (MKI) during operation with 50ns bunch spacing. This was du…
Higher order mode spectra and the dependence of localized dipole modes on the transverse beam position in third harmonic superconducting cavities at FLASH
Pei Zhang, Nicoleta Baboi, Roger M. Jones
An electron beam entering an accelerating cavity excites a wakefield. This wakefield can be decomposed into a series of multi-poles or modes. The dominant component of the transver…
Higher Order Modes for Beam Diagnostics in Third Harmonic 3.9 GHz Accelerating Module
N. Baboi, N. Eddy, T. Flisgen +4
An international team is currently investigating the best way to use Higher Order Modes (HOM) for beam diagnostics in 3.9 GHz cavities. HOMs are excited by charged particles when p…
Eigenmode Simulations of Third Harmonic Superconducting Accelerating Cavities for FLASH and the European XFEL
Pei Zhang, Nicoleta Baboi, Roger M. Jones
The third harmonic nine-cell cavity (3.9 GHz) for FLASH and the European XFEL has been investigated using simulations performed with the computer code CST Microwave Studio. The ban…
Measurement of the dynamic response of the CERN DC spark system and preliminary estimates of the breakdown turn-on time
Nicholas Shipman, Sergio Calatroni, Roger M. Jones +1
The new High Repetition Rate (HRR) CERN DC Spark System has been used to investigate the current and voltage time structure of a breakdown. Simulations indicate that vacuum breakdo…
Simulations of higher order modes in the ACC39 module of FLASH
I. R. R. Shinton, R. M. Jones, Z. Li +1
This study is focused on the development of a HOM-based BPM system for the ACC39 module currently installed and in operation at FLASH. A similar system is anticipated to be install…
Enhanced coupling design of a detuned damped structure for clic
A. D'Elia, R. M. Jones, A. Grudiev +3
The key feature of the improved coupling design in the Damped Detuned Structure (DDS) is focused on the four manifolds. Rectangular geometry slots and rectangular manifolds are use…