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“There is, in fact, hardly an argument that can be advanced for the stern suppression of crime by penal methods that does not apply equally to the suppression of disease. . . . “ Medical service in the penal and correctional institutions throughout the United States has been reported at various times to be below the level of medical care for the general population. In 1939 McCartney2 noted that...

P. Bellomo, A. de Lira (SLAC) Menlo Park, CA 94025-7015, USA Abstract The Stanford Synchrotron Radiation Laboratory (SSRL) has successfully commissioned SPEAR3, its newly upgraded 3-GeV synchrotron light source. First stored beam occurred December 15, 2003 and 100mA operation was reached on January 20, 2004. This paper describes the specification, design, and performance of the SPEAR3 DC magnet...

Increasing power density, faster switching and higher currents forces designers to spend more time both considering the effects of electromagnetic interference (EMI) and debugging a design that has EMI problems but is otherwise complete. This paper explains the different types of EMI and their coupling mechanisms and the existing EMI regulations. The most frequent noise sources, transmission pa...

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The Stanford Synchrotron Radiation Laboratory (SSRL) has successfully commissioned SPEAR3, its newly upgraded 3-GeV synchrotron light source. First stored beam occurred December 15, 2003 and 100mA operation was reached on January 20, 2004. This paper describes the specification, design, and performance of the SPEAR3 DC magnet large power supplies (LGPS) that consist of tightly-regulated (better...

Figure 1-1 Transformer Equivalent Circuit Introduction Experienced SwitchMode Power Supply designers know that SMPS success or failure depends heavily on the proper design and implementation of the magnetic components. Parasitic elements inherent in high frequency transformers or inductors cause a variety of circuit problems including: high losses, high voltage spikes necessitating snubbers or ...

The trend in next-generation switched-mode power supplies will lead to modular, scalable solutions which can deliver power efficiently over a wide range of operation. Multiple parallel power stages, often called “phases”, are necessary to meet these requirements. This paper details a new approach to introduce more control features like phase-alignment, current sharing and phase shedding, which ...