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in creator/contributor: "Corlett, John N."  
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Numerical Study of Coulomb Scattering Effects on Electron Beamfrom a Nano-Tip

Description: Nano-tips with high acceleration gradient around the emission surface have been proposed to generate high brightness beams. However, due to the small size of the tip, the charge density near the tip is very high even for a small number of electrons. The stochastic Coulomb scattering near the tip can degrade the beam quality and cause extra emittance growth and energy spread. In the paper, we present a numerical study of these effects using a direct relativistic N-body model. We found that emitt… more
Date: June 25, 2007
Creator: Qiang, Ji; Corlett, John N.; Lidia, Steven M.; Padmore, HowardA.; Wan, Weishi; Zholent, Andrew A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

FEL Design Studies at LBNL: Activities and Plans

Description: LBNL staff are currently pursuing R&D for future x-ray FELs, and participate in two FEL construction projects. Our strategy is to address the most fundamental challenges, which are the cost-drivers and performance limitations of FEL facilities. An internally funded R&D program is aimed at investigating accelerator physics and technologies in three key areas: (1) Theoretical study, modeling, and experimental development of low emittance, high quantum efficiency cathodes; (2) Design studi… more
Date: March 1, 2007
Creator: Corlett, John N.; Fawley, W.; Lidia, S.; Padmore, H.; Penn, G.; Pogorelov, I. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Re-circulating linac vacuum system

Description: The vacuum system for a proposed 2.5 GeV, 10{Mu}A recirculating linac synchrotron light source [1] is readily achievable with conventional vacuum hardware and established fabrication processes. Some of the difficult technical challenges associated with synchrotron light source storage rings are sidestepped by the relatively low beam current and short beam lifetime requirements of a re-circulating linac. This minimal lifetime requirement leads directly to relatively high limits on the background… more
Date: May 9, 2003
Creator: Wells, Russell P.; Corlett, John N. & Zholents, Alexander A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The refrigeration and cryogenic distribution system for the shortpulse x-ray source

Description: This report describes the essential elements of the cryogenic system. The cryogenic distribution system starts at the level of the linac superconducting RF cavities [1] and moves out through the cryogenic piping to the liquid helium refrigeration plant that will be used to cool the RF cavities and the undulator magnets. For this report, the cryogenic distribution system and cryogenic refrigerator includes the following elements: (1) The piping within the linac cryogenic modules will influence t… more
Date: October 20, 2002
Creator: Green, Michael A. & Corlett, John N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Initial Feasibility Study of a Dedicated Synchrotron Radiation Light source for Ultrafast X-Ray Science

Description: We present an initial feasibility summary of a femtosecond synchrotron radiation x-ray source based on a flat-beam rf gun and a recirculating superconducting linac that provides beam to an array of undulators and bend magnets. Optical pulse durations of < 100 fs are obtained by a combination of electron pulse compression, transverse temporal correlation of the electrons, and x-ray pulse compression. After an introduction and initial scientific motivation, we cover the following aspects of th… more
Date: October 26, 2001
Creator: Corlett, John N.; DeSantis, S.; Hartman, N.; Heimann, P.; LaFever, R.; Li, D. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The next linear collider damping ring lattices

Description: We report on the lattice design of the Next Linear Collider (NLC) damping rings. The damping rings are required to provide low emittance electron and positron bunch trains to the NLC linacs, at a rate of 120 Hz. We present an optical design, based on a theoretical minimum emittance (TME) lattice, to produce the required normalized extracted beam emittances gex = 3 mm-mrad and gey = 0.02 mm mrad. An assessment of dynamic aperture and non-linear effects is given. The positron pre-damping ring, re… more
Date: June 20, 2001
Creator: Wolski, Andrzej & Corlett, John N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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