11th International Conference on High-Energy Accelerators: by J. B. Adams, M. Peter (auth.), W. S. Newman (eds.)

By J. B. Adams, M. Peter (auth.), W. S. Newman (eds.)

The convention timetable needed to be so prepared as to unfold the most themes over a number of separate periods. It used to be for that reason determined to submit the fabric in those lawsuits less than 9 topic headings, regardless of consultation. inside of every one bankruptcy, that's preceded by way of a listing of the classes that includes the topic, all papers, invited and contributed, no matter if awarded on the convention or authorised for booklet in simple terms, were prepared in a few lo­ gical order. The experiences of the 4 Panel Discussions have been edited or summarized by means of the respective Moderator in session with Panel individuals. in a single example, shortened models of the Introductory Papers precede the dialogue. the place attainable, verbatim debts of the usually energetic exchanges were retained. The common catalogue of high-energy acceler­ ators has been released individually. the ongoing world-wide actions in accelerator learn, witl1 its ever greater seasoned­ jects, are mirrored via the various contributions authorized for inclusion in those complaints, that have reached the restrict of what a unmarried quantity can manageably include, whereas making fast e-book even more durable to accomplish. the entire extra cause to increase the gratitude of all con­ cerned to these focused on the chain of creation: - To the authors, for his or her instructed handing-in or well timed posting in their papers. thank you additionally to their secretaries who the information for the presentation of camera-ready copy.

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Extra info for 11th International Conference on High-Energy Accelerators: Geneva, Switzerland, July 7–11, 1980

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4). 3 GeV and was restored after moving back to the first energy. Also s fast beam depolarizing resonance setup was tested successfully. Fig. 4: Asymmetry of backscattered photons caused by polarization of the electron THE VERTICAL BEAM SIZE beam. At the highest energies the current is limited by the rf power. Therefore the specific luminosity should be as high as possible and the vertical emittance as small as possible. The vertical emittance in PETRA is dominated by quantum excitation due to spurious vertical dispersion.

After purging with dry nitrogen and pumpdown, there has been no requirement for in situ bakeout. Radiofrequency system 7 ) The PEP 353-MHz radiofrequency accelerating system is comprised of 12 stations. Each station consists of a 500-KW klystron which feeds a pair of 5-cell accelerating cavities. The SLAG-designed 500-KW klystrons have performed well, although the peak efficiency is a few percent less than the hoped for 70%. Some of the early tubes went soft while awaiting completion of installation after high power testing.

It gro~s monotonically from zero for m = 1 to about 4 rnA for m = 4. The resonances are independent of chromaticity and thus are not caused by the variation of tune ~ith energy. We found t~o ~ays to increase the residual current: By moving the orbit in the cavities and by changing the dispersion around the machine. This points to t~o other mechanisms for I residual [mAl I bI satellite resonance excitation: By transversal fields in the cavities 12 ) and by dispersion in the cavities 13 ). Both effects may be present in PETRA 2 ).

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