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High Precision SC Cavity alignment Measurements with Higher Order Modes

Description: Experiments at the FLASH linac at DESY have demonstrated that the higher order modes (HOMs) induced in superconducting cavities can be used to provide a variety of beam and cavity diagnostics. The centers of the cavities can be determined from the beam orbit which produces minimum power in the dipole HOM modes. The phase and amplitude of the dipole modes can be used as a high resolution beam position monitor. For most superconducting accelerators, the existing HOM couplers provide the necessary… more
Date: June 14, 2007
Creator: Molloy, Stephen; Frisch, Josef; Hendrickson, Linda; McCormick, Douglas; May, Justin; Ross, Marc et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Electronics and Algorithms for HOM Based Beam Diagnostics

Description: The signals from the Higher Order Mode (HOM) ports on superconducting cavities can be used as beam position monitors and to do survey structure alignment. A HOM-based diagnostic system has been installed to instrument both couplers on each of the 40 cryogenic accelerating structures in the DESY TTF2 Linac. The electronics uses a single stage down conversion form the 1.7 GHz HOM spectral line to a 20MHz IF which has been digitized. The electronics is based on low cost surface mount components su… more
Date: October 16, 2006
Creator: Frisch, Josef; Baboi, Nicoleta; Eddy, Nathan; Nagaitsev, Sergei; Hensler, Olaf; McCormick, Douglas et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ATF2 Proposal

Description: This document is the first of two volumes describing the ATF2 project. The present volume discusses the technical justification for ATF2 and presents a design description. Since the International Committee for Future Accelerator (ICFA) decision on the choice of technology, a world-wide collaboration on the design of the International Linear Collider (ILC) has rapidly progressed [1]. The formation of the Global Design Effort (GDE) will accelerate the work towards a final design. An important tec… more
Date: August 23, 2005
Creator: Grishanov, Boris Ivanovich; Logachev, Pavel; Podgorny, Fedor; Telnov, Valery; Angal-Kalinin, Deepa; Appleby, Robert et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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