NDLI: The capacitor charging power supply for the next-generation linear collider

Content Provider	IEEE Xplore Digital Library
Author	Pappas, C. Cassel, R. de Lamare, J. Nguyen, M. Tarter, R.
Copyright Year	1998
Description	Author affiliation: Linear Accel. Center, Stanford Univ., CA, USA (Pappas, C.)
Abstract	The klystrons for the next-generation linear collider (NLC) are designed to operate at 500 kV, and have a microperveance of 0.75/spl times/10/sup -6/ AV/sup 3/2/, or 265 A of beam current. Two klystrons are planned to be driven in parallel by one pulse modulator with a 1:14 step up transformer. The impedance of the pulse forming network (PFN) for the modulator is therefore 4.8 /spl Omega/, while the charge voltage is 71.5 kV. The pulse width is 1.5 /spl mu/s, so the total capacitance to be charged is 0.156 /spl mu/F. The maximum repetition frequency is 180 Hz. The power supply required to charge the PFN is thus an 80 kV, 100 kW capacitor charging power supply. Because of the large number of klystrons used in the NLC, up to approximately 10,000, there are several additional requirements which the capacitor charging supply must meet. The most important of these requirements is efficiency, which must be approximately 95% or better. Next is cost, followed by reliability (greater than 50,000 hour MTBF), maintainability, ease of connection, disconnection and transport. Several circuit topologies designed to meet the charger requirements have been studied. Detailed analysis has been performed on a flyback power converter, a series resonant power converter, and a command resonant power converter. Advantages and disadvantages of each are discussed.
Starting Page	241
Ending Page	244
File Size	361208
Page Count	4
File Format	PDF
ISBN	0780342445
ISSN	10768467
DOI	10.1109/MODSYM.1998.741237
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-06-25
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power capacitors Power supplies Pulse modulation Klystrons Pulse transformers Pulsed power supplies Resonance Colliding beam devices Impedance Space vector pulse width modulation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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