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Superconducting Multi-Cell Deflecting Cavity for Short-Pulse X-Ray Generation at the Advanced Photon Source

Description: A superconducting multi-cell cavity for the production of short x-ray pulses at the Advanced Photon Source (APS) has been explored as an alternative to a single-cell cavity design in order to improve the packing factor and potentially reduce the number of high-power RF systems and low-level RF controls required. The cavity will operate at 2815 MHz in the APS storage ring and will require heavy damping of parasitic modes to maintain stable beam operation. Novel on-cell dampers, attached directly… more
Date: May 1, 2009
Creator: G.J. Waldschmidt, L.H. Morrison, R. Nassiri, R.A. Rimmer, K. Tian, H. Wang
Partner: UNT Libraries Government Documents Department
open access

A model-data intercomparison of CO2 exchange across North America: Results from the North American Carbon Program Site Synthesis

Description: Our current understanding of terrestrial carbon processes is represented in various models used to integrate and scale measurements of CO{sub 2} exchange from remote sensing and other spatiotemporal data. Yet assessments are rarely conducted to determine how well models simulate carbon processes across vegetation types and environmental conditions. Using standardized data from the North American Carbon Program we compare observed and simulated monthly CO{sub 2} exchange from 44 eddy covariance … more
Date: June 1, 2011
Creator: Schwalm, C. R.; Williams, C. A.; Schaefer, K.; Anderson, R.; Arain, M. A.; Baker, I. et al.
Partner: UNT Libraries Government Documents Department
open access

Detailed Performance Model for Photovoltaic Systems: Preprint

Description: This paper presents a modified current-voltage relationship for the single diode model. The single-diode model has been derived from the well-known equivalent circuit for a single photovoltaic cell. The modification presented in this paper accounts for both parallel and series connections in an array.
Date: July 1, 2012
Creator: Tian, H.; Mancilla-David, F.; Ellis, K.; Muljadi, E. & Jenkins, P.
Partner: UNT Libraries Government Documents Department
open access

Regenerable Sorbent Development for Sulfur, Chloride and Ammonia Removal from Coal-Derived Synthesis Gas

Description: A large number of components in coal form corrosive and toxic compounds during coal gasification processes. DOE’s NETL aims to reduce contaminants to parts per billion in order to utilize gasification gas streams in fuel cell applications. Even more stringent requirements are expected if the fuel is to be utilized in chemical production applications. Regenerable hydrogen sulfide removal sorbents have been developed at NETL. These sorbents can remove the hydrogen sulfide to ppb range at 316 °C a… more
Date: August 1, 2007
Creator: Siriwardane, R. V.; Tian, H.; Simonyi, T. & Webster, T.
Partner: UNT Libraries Government Documents Department
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