• A. Chan, P. Bellomo, G. R. Crane, P. Emma, E. Grunhaus, K. Luchini, I. A. MacGregor, D. S. Marsh, R. Pope, P. L. Prickett, E. Rago, K. Ratcliffe, T. Shab
  SLAC, Menlo Park, California

Changes to beamline optics may effect many engineering processes downstream. In the past, we incorporated these changes manually into disparate engineering spreadsheets. At LCLS, database applications have been developed in order to compare and clearly display differences amongst various versions of beamline optics files. These applications also incorporate the changes into engineering databases, after they have been validated by the engineers. This allows the engineers to be notified, and modifications to be made if beamline optics changes require corresponding adjustments of engineering elements. This paper will describe how this streamlines the workflow, and also provides greater reliability in how beamline optics changes are integrated into engineering databases (such as cabling, power supplies, inventory). The paper includes a description of the related LCLS inventory system, which also serves as a repository for quality assurance documents. The underlying database schemas and applications will be outlined.

• B. Lam, P. Bellomo, D. Macnair, A. C. de Lira
  SLAC, Menlo Park, California

In 2008 KEK is commissioning ATF2 - an extension to the existing ATF. ATF2 is a mockup of the final focus test beam accelerator envisioned in the ILC. SLAC is designing the power supply systems for the dc magnets in the ATF2, which will require 38 power supplies ranging from 1.5 to 6 kW, currents from 50 to 200 A, all rated at output voltages not higher than 30 V. Because of the extensive quantities of magnets required for the ILC, high availability is paramount to its successful operation, so the power supply topology chosen for the ATF2 uses N+1 redundancy, with 50-A power modules to construct each power supply. These power modules are current-mode buck regulators, which operate in parallel with each other and one redundant module. One bulk power supply provides off-the-line regulated dc input to a number of the power supplies. Current stability requirements for the magnets range from 10 to 10⁰⁰ ppm. A precision current transductor and a recently developed SLAC-built 20-bit Ethernet Power Supply Controller will provide the current regulation required. In this paper we present the conceptual design, prototype results, and the status of the power supply systems for the ATF2.

• A. C. de Lira, P. Bellomo, K. Luchini, D. Macnair
  SLAC, Menlo Park, California

The LCLS injector at SLAC requires 100+ dc-magnet power supply systems for its operation. Power supplies are divided into two main groups: intermediate rack-mounted type for output powers up to 20 kW at 375 A, and bipolar units rated 6 A, 12 A, and 30 A for corrector magnets and small quadrupoles. The intermediate power supplies are controlled by a 20-bit Ethernet power supply controller, specially developed at SLAC to be used in this project. The bipolar units are controlled via 12-bit DACs and ADCs housed in a VME crate. EPICS is the controls interface to all systems. For all systems, stability requirements are better than 10⁰⁰ ppm. The Power Conversion Department at SLAC, in close cooperation with the LCLS Controls group, was responsible for defining the major characteristics of the power supply systems, their specification, procurement, installation, and commissioning. In this paper we describe the main characteristics of the power supply systems for the LCLS injector, including results from their successful commissioning early this year.

• A. Seryi, J. A. Amann, R. Arnold, F. Asiri, K. L.F. Bane, P. Bellomo, E. Doyle, A. F. Fasso, L. Keller, J. Kim, K. Ko, Z. Li, T. W. Markiewicz, T. V.M. Maruyama, K. C. Moffeit, S. Molloy, Y. Nosochkov, N. Phinney, T. O. Raubenheimer, S. Seletskiy, S. Smith, C. M. Spencer, P. Tenenbaum, D. R. Walz, G. R. White, M. Woodley, M. Woods, L. Xiao
  SLAC, Menlo Park, California
• I. V. Agapov, G. A. Blair, S. T. Boogert, J. Carter
  Royal Holloway, University of London, Surrey
• M. Alabau, P. Bambade, J. Brossard, O. Dadoun
  LAL, Orsay
• M. Anerella, A. K. Jain, A. Marone, B. Parker
  BNL, Upton, Long Island, New York
• D. A.-K. Angal-Kalinin, C. D. Beard, J.-L. Fernandez-Hernando, P. Goudket, F. Jackson, J. K. Jones, A. Kalinin, P. A. McIntosh
  STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
• R. Appleby
  UMAN, Manchester
• J. L. Baldy, D. Schulte
  CERN, Geneva
• L. Bellantoni, A. I. Drozhdin, V. S. Kashikhin, V. Kuchler, T. Lackowski, N. V. Mokhov, N. Nakao, T. Peterson, M. C. Ross, S. I. Striganov, J. C. Tompkins, M. Wendt, X. Yang
  Fermilab, Batavia, Illinois
• K. Buesser
  DESY, Hamburg
• P. Burrows, G. B. Christian, C. I. Clarke, A. F. Hartin
  OXFORDphysics, Oxford, Oxon
• G. Burt, A. C. Dexter
  Cockcroft Institute, Warrington, Cheshire
• J. Carwardine, C. W. Saunders
  ANL, Argonne, Illinois
• B. Constance, H. Dabiri Khah, C. Perry, C. Swinson
  JAI, Oxford
• O. Delferriere, O. Napoly, J. Payet, D. Uriot
  CEA, Gif-sur-Yvette
• C. J. Densham, R. J.S. Greenhalgh
  STFC/RAL, Chilton, Didcot, Oxon
• A. Enomoto, S. Kuroda, T. Okugi, T. Sanami, Y. Suetsugu, T. Tauchi
  KEK, Ibaraki
• A. Ferrari
  UU/ISV, Uppsala
• J. Gronberg
  LLNL, Livermore, California
• Y. Iwashita
  Kyoto ICR, Uji, Kyoto
• W. Lohmann
  DESY Zeuthen, Zeuthen
• L. Ma
  STFC/DL, Daresbury, Warrington, Cheshire
• T. M. Mattison
  UBC, Vancouver, B. C.
• T. S. Sanuki
  University of Tokyo, Tokyo
• V. I. Telnov
  BINP SB RAS, Novosibirsk
• E. T. Torrence
  University of Oregon, Eugene, Oregon
• D. Warner
  Colorado University at Boulder, Boulder, Colorado
• N. K. Watson
  Birmingham University, Birmingham
• H. Y. Yamamoto
  Tohoku University, Sendai