200 East Vadose Test Site Hanford, Washington: Electrical Resistance Tomography.  Final Report FY 2001 (open access)

200 East Vadose Test Site Hanford, Washington: Electrical Resistance Tomography. Final Report FY 2001

This report covers the electrical resistance tomography (ERT) work performed at the Hanford Reservation, 200 East Area Vadose test (Sisson and Lu) site during the period March 23 through May 5, 2001. The purposes of the ERT work were to: (1) compare and contrast the development of the highly concentrated sodium thio-sulfate plume (FY01 work) with the fresh river water plume observed during FY00; (2) use the resistance images to infer the dynamics of the plume during two or three of the sodium thiosulfate releases and during the water ''chaser'' release; (3) determine the influence of the site's steel casings on the capability to construct reliable ERT images; (4) determine if the steel casings at the site can be used as long electrodes to provide useful images of at least one release; and (5) develop quantitative estimates of the noise in the data and its effect on reconstructed images.
Date: June 1, 2000
Creator: Ramirez, Abelardo L.; Daily, William D. & Binley, Andrew M.
Object Type: Report
System: The UNT Digital Library
Texas State Library and Archives Commission Strategic Plan: Fiscal Years 2001-2005 (open access)

Texas State Library and Archives Commission Strategic Plan: Fiscal Years 2001-2005

Report detailing the strategic plan for of the Texas Library and Archives Commission for fiscal years 2001 to 2005 outlining their mission, past activities, and goals.
Date: June 1, 2000
Creator: Texas State Library and Archives Commission
Object Type: Book
System: The Portal to Texas History
RF cavity R&D at LBNL for the NLC Damping Rings,FY2000/2001 (open access)

RF cavity R&D at LBNL for the NLC Damping Rings,FY2000/2001

This report contains a summary of the R&D activities at LBNL on RF cavities for the NLC damping rings during fiscal years 2000/2001. This work is a continuation of the NLC RF system R&D of the previous year [1]. These activities include the further optimization and fine tuning of the RF cavity design for both efficiency and damping of higher-order modes (HOMs). The cavity wall surface heating and stresses were reduced at the same time as the HOM damping was improved over previous designs. Final frequency tuning was performed using the high frequency electromagnetic analysis capability in ANSYS. The mechanical design and fabrication methods have been developed with the goals of lower stresses, fewer parts and simpler assembly compared to previous designs. This should result in substantial cost savings. The cavity ancillary components including the RF window, coupling box, HOM loads, and tuners have been studied in more detail. Other cavity options are discussed which might be desirable to either further lower the HOM impedance or increase the stored energy for reduced transient response. Superconducting designs and the use of external ''energy storage'' cavities are discussed. A section is included in which the calculation method is summarized and its accuracy …
Date: June 1, 2001
Creator: Rimmer, R.A.; Atkinson, D.; Corlett, J.N.; Koehler, G.; Li, D.; Hartman, N. et al.
Object Type: Report
System: The UNT Digital Library