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High-carbon fly-ash as a binder for iron ore pellets

Description: The goal of this project was to convert currently unusable fly-ashes into a material that can be used as a binder for iron ore. Such a binder would also be useful for other high-volume markets, including foundry sand mold binders. Previously, the investigators used fly-ash in combination with calcium hydroxide as an additive while calcium chloride was added as a hardening accelerator. However, the addition of chloride salts have a detrimental effect because chlorine causes corrosion in processing equipment. Therefore, other potential hardening accelerators were investigated during this project. During production, dried iron-ore pellets are required to have crushing strength of at least 22.2 newtons (5 pounds force) per 12.7 mm (1/2 inch) diameter pellet. The pellets are then sintered at temperatures up to 1300 C and must not exhibit a significant degree of spalling or cracking. Pellets will therefore be tested to determine whether acceptable dry crushing strengths can be achieved.
Date: September 1, 1999
Creator: Kawatra, S.K.; Eisele, T.C.; Ripke, S.J. & Ramirez, G.
Partner: UNT Libraries Government Documents Department

NSLS RF system improvements

Description: It is required that the NSLS x-ray accelerator reach an energy of 2.5 GeV. An additional accelerating cavity and power amplifier system were installed to meet this goal. A new control system was designed to include phase and amplitude servos as well as computer interfacing. Commissioning and operating experience will be reported.
Date: January 1, 1985
Creator: Keane, J.; Thomas, M.; McKenzie-Wilson, R.; D'Alsace, R.; Ackerman, H.; Biscardi, R. et al.
Partner: UNT Libraries Government Documents Department

NSLS X-Ray system RF system upgrade

Description: Presently (Dec. 1992) three RF systems power the electron beam at the NSLS X-Ray storage ring to 250 mA at 2.58 GeV. A fourth RF cavity and system is being installed to increase the machine reliability over pre-shutdown operational conditions (3 cavities). It also permits new levels of beam intensity and energy to be achieved in the X-Ray ring. Intensities of 500 mA at 2.5 GeV as well as 250 mA at 2.8 GeV are anticipated. A description of the hardware, the installation and the modes of operation will be outlined in this paper. X-Ray ring operations are scheduled to resume January 1993. Injection performance and high energy reliability will also be discussed.
Date: July 1, 1993
Creator: Thomas, M. G.; Biscardi, R.; Broome, W.; Buda, S.; D`Alsace, R.; Hanna, S. et al.
Partner: UNT Libraries Government Documents Department

Application of Coherent Tune Shift Measurements to the Characterization of Electron Cloud Growth

Description: Measurements of coherent tune shifts at the Cornell Electron Storage Ring Test Accelerator (CesrTA) have been made for electron and positron beams under a wide variety of beam energies, bunch charge, and bunch train configurations. Comparing the observed tunes with the predictions of several electron cloud simulation programs allows the evaluation of important parameters in these models. These simulations will be used to predict the behavior of the electron cloud in damping rings for future linear colliders. We outline recent improvements to the analysis techniques that should improve the fidelity of the modeling.
Date: March 28, 2011
Creator: Kreinick, D.L.; Crittenden, J.A.; Dugan, G.; Holtzapple, R.L.; Randazzo, M.; Furman, M.A. et al.
Partner: UNT Libraries Government Documents Department