A normalized detector of beam transverse oscillations

Pellegrin, J.-L.

doi:10.1016/0029-554x(79)90073-9

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…These detectors are similar to the circuits developed for the Transverse Feedback System of PEP and have been analyzed elsewhere in more detail. 2 The basic approach for this detection consists of using a single pulse train as obtained from the sum of two adjacent electrodes, here 2 inward buttons, and to process the pulses' crests only. * Work supported by the Department of Energy, contract DE-AC03-76SF00515.…”

Section: Description Of Dynamic Trackingmentioning

confidence: 99%

A Diagnostic for Dynamic Aperture

Morton

Pellegrin

Raubenheimer

et al. 1985

IEEE Trans. Nucl. Sci.

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Section: Description Of Dynamic Trackingmentioning

confidence: 99%

A Diagnostic for Dynamic Aperture

Morton

Pellegrin

Raubenheimer

et al. 1985

IEEE Trans. Nucl. Sci.

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“…Figure 7 shows the block diagram of a closed-loop feedback system 12 ) that has been developed for PEP to damp transv.-.rse oscillations of the beam. Twelvc wide-band detectors 13 ' are used to sample-and-hold vertical and horizontal "error" signals for the 3 bunches in each beam. A modulated suppressed-carrier 9.8 MHz excitation amplifier is used to drive the beam and close the loop.…”

Section: Rf System Control 3nd Monitoringmentioning

confidence: 99%

The PEP Instrumentation and Control System

Melen

1980

Experientia Supplementum

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Addition and Substitution Reactions of Nitrile‐Stabilized Carbanions

1984

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The utilization of carbanions stabilized by various electron‐withdrawing groups to effect carboncarbon bond formation occupies a central position in organic synthesis. This chapter focuses on the reactions of nitrile‐stabilized carbanions with an array of carbon electrophiles and updates another chapter along these lines in this series. Subsequent review articles have dealt with various aspects of the chemistry of nitrile‐stabilized carbanions. In this review, the reactions of nitrile‐stabilized anions are grouped according to the nature of the substituents attached to the carbanion center bearing the nitrile group. These substituents include alkyl, alkenyl, alkynyl, and aryl groups as well as various α‐oriented halogen‐, oxygen‐, nitrogen‐, sulfur‐, and selenium‐containing groups. Notably absent from this survey are the carbanions derived from active methylene compounds bearing two electron‐withdrawing groups such as cyanoacetate esters, malononitriles, α‐sulfonylnitriles, and α‐phosphorylnitriles. Also absent are those carbanions such as Reissert compounds, which are the subject of comprehensive reviews. The chapter is arbitrarily subdivided into six sections: (1) reactions of alkyl‐, aryl‐, and heteroaryl‐substituted nitriles; (2) reactions of α,β‐ and β,γ‐unsaturated nitriles as well as tolunitriles; (3) reactions of cyanohydrins and their hydroxyl‐protected derivatives; (4) reactions of nitriles bearing α‐sulfur and α‐selenium substituents; (5) reactions of α‐(dialkylamino)nitriles; and (6) reactions of α‐halonitriles. Within each of these sections, the reactions are further subdivided according to the nature of the electrophile: (1) alkylation reactions employing alkyl halides, alkyl sulfonates, dialkyl sulfates, and epoxides; (2) arylation reactions involving the substitution of hydrogen, halogen, nitro, or alkoxy groups on aryl or heteroaryl substrates; (3) acylation reactions employing carboxylic esters, anhydrides, acid chlorides, dialkyl carbonates, and nitriles; (4) addition reactions involving aldehydes, ketones, imines, alkenes, and alkynes; and (5) Michael‐type addition reactions to unsaturated aldehydes, ketones, imines, sulfoxides, sulfones, and nitro compounds. Finally, a section involving cyclization reactions is included for each of the six groups of nitrile‐stabilized anions.

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A normalized detector of beam transverse oscillations

Abstract: This beam detector accepts the narrow pulses typically encountered in electron storage rings. It is composed of a peak detector with a threshold held constant by means of an automatic gain control (AGC) * Work supported by the Department of Energy under contract number EY-76-C-03-0515.

Cited by 5 publications

References 5 publications

A Diagnostic for Dynamic Aperture

A Diagnostic for Dynamic Aperture

The PEP Instrumentation and Control System

Addition and Substitution Reactions of Nitrile‐Stabilized Carbanions

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