NDLI: An availability model for the SNS linac RF system

Content Provider	IEEE Xplore Digital Library
Author	Tallerico, P. Rees, D. Anderson, D.
Copyright Year	2001
Description	Author affiliation: Los Alamos Nat. Lab., NM, USA (Tallerico, P.)
Abstract	The linac RF system is broken down into eight major components for this model. These components are: the klystrons, the waveguide, the water loads, the circulators, the converter/modulator, the transmitter, the window, and the low level RF (LLRF) controls. The mean time between failures (MTBF) for several of the components vary with voltage or klystron power level, and this variation is discussed below. In general, these MTBF's are design requirements supplied to the vendors of the subsystems, and verified at design reviews and by the experience at other accelerators. We assume that the scheduled operational time for the SNS is 6000 hours per year, and use this number to calculate the availability. We have to calculate the total down time during the 6000 hours of operation, and the availability is defined as one minus the unexpected down time for the year, divided by the number of operating hours in the year. Ideally, we would use distributions of MTBF's and MTTR's, since each failure will be different, but the equipment is not yet built, so the distributions are not available, and we make the assumption of constant MTBF and MTTR.
Sponsorship	U.S. Dept. Energy
Starting Page	1035
Ending Page	1037
File Size	301651
Page Count	3
File Format	PDF
ISBN	0780371917
DOI	10.1109/PAC.2001.986567
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-06-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Linear particle accelerator Radio frequency Klystrons Transmitters Circulators Laboratories Frequency estimation Power system modeling Loaded waveguides Waveguide components
Content Type	Text
Resource Type	Article

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