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Showing papers on "Electronics cooling published in 1983"


Journal ArticleDOI
TL;DR: In this article, the authors describe another type of notch filter, called the short stub filter (SSF), which is quite insensitive to imperfections in cables and components, and can therefore be constructed from commercially available components.
Abstract: The shorted stub filter (SSF) has been used extensively to provide the electronics gain shaping for stochastic cooling of longitudinal beam emittance. The repetitive notch of this filter results from the cancellation of the incident signal by the reflected signal at frequencies where the cable electrical length equals an integer number of half wavelengths. Variations in notch depth of the SSF have been approximately compensated by a rather complicated system. Dispersion of the notch frequency resulting from variation of the phase velocity can also be approximately corrected using tuned imperfections in the shorted cable. Dispersion due to imperfections in the coaxial cable can be quite significant and can only be compensated for by costly construction techniques. This paper describes another type of notch filter. Although this filter has been mentioned previously, this analysis demonstrates the advantages of this filter in providing small notch dispersion and other properties necessary for stochastic cooling systems. Because this filter uses only forward signals, it is quite insensitive to imperfections in cables and components, and can therefore be constructed from commercially available components.

5 citations


Proceedings Article
T. Wolpert1
01 Oct 1983
TL;DR: In this paper, a continuation of previously presented (1) availability analysis of power and cooling subsystems in an electronic switching center is presented, in which failure mechanisms of the power supply and cooling equipment are interconnected, both subsystems including common elements such as AC power supply.
Abstract: This paper provides a continuation of previously presented (1) availability analysis of power and cooling subsystems in an electronic switching centre. The following items are treated in particular. Failure mechanisms of power and cooling equipment are interconnected, both subsystems including common elements such as AC power supply. Availability calculations are carried out considering this interconnection. Methods of improving the availability of air conditioning system are investigated and corresponding availability figures are derived. Conclusions are arrived at on the availability of power and cooling, treated in an integrated way.

3 citations


Proceedings Article
01 Oct 1983
TL;DR: In this article, the design approach taken for heating and cooling an unmanned container hut, which contains electronic local switching equipment, to maintain the container hut air temperature and relative humidity within a given range.
Abstract: This paper explains the design approach taken for heating and cooling an unmanned container hut, which contains electronic local switching equipment, to maintain the container hut air temperature and relative humidity within a given range. Electronic switch reliability is assured. A new small air-cooled package airconditioner, which has both a refrigerant cycle with a compressor and a thermosiphon in one body, was developed for this container hut. A field test clarified that the new airconditioner saves 20%~30% of the power needed for cooling, compared with a conventional airconditioner. Air temperature and relative humidity in the container hut are adequately controlled.

1 citations


Journal ArticleDOI
A. G. Ruggiero1
TL;DR: In this article, an analysis is made of the closed loop system for momentum stochastic cooling in the Tevatron I project at Fermilab, where the electronic feedback depends not only on the electronic component characteristics but also on the beam intensity and energy distribution.
Abstract: The Tevatron I project at Fermilab depends critically on the momentum stochastic cooling to collect and store antiprotons produced by injecting protons on a target. This project differs from the similar original project at CERN by the fact that it requires greater antiproton flux. Moreover, the stochastic cooling design is made of several systems each with its own pickup, kickers, and chain of amplification. These systems could overlap in the frequency bandwidth as well as in the beam response dynamics. It has been argued, consequently, that the performance of the momentum cooling might have been limited by the signal suppression which one derives when examining the cooling system in closed loop. In this paper an analysis is made of the closed loop system for momentum stochastic cooling. In the closed loop configuration the electronic feedback depends not only on the electronic component characteristics but also on the beam intensity and energy distribution. The results give the interrelation between the signals from the different parts of the system and their mutual enhancement or suppression. The paper goes on to derive the Vlasov equation, to calculate the perturbation force, and to solve a larger number of dispersion relations.

1 citations