Electron Positron Storage Rings: Status and Present Limitations

Amman, F.

doi:10.1109/tns.1969.4325443

Cited by 14 publications

(6 citation statements)

References 3 publications

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“…It was soon clear that collective instabilities were playing a major role, in fact limiting initially the stored current to about 100 µA, against the 100 mA of the design. The situation was well summarized by Amman in a paper presented at the 1969 Particle Accelerator conference [43]: It may seem strange that eight years after the initial operation of a storage ring, only one e − e − (the Princeton-Stanford 550 MeV) and two e + e − rings, VEPP-II and ACO, have produced high energy physics results, and these are limited to experiments with very high cross section I would like to remark that the first beam instabilities observed on the Princeton-Stanford e − e − ring, and interpreted as being due to the resistance of the walls, opened a new era in the accelerator field: it has been realized for the first time that the interaction of the beam with its environment makes a circular accelerator an essentially unstable system, that can become stable, in virtue of the Landau damping, when the beam density is not too high and the non linearities in the focusing forces give a frequency distribution of the particles large enough to compete with the instabilities.…”

Section: Vi2 Contributions To Adone Accelerator Physicsmentioning

confidence: 94%

Bruno Touschek: From Betatrons to Electron–Positron Colliders

Bernardini

Pancheri

Pellegrini

2015

Rev. Accl. Sci. Tech.

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Bruno Touschek's life as a physicist spanned the period from World War II to the 1970s. He was a key figure in the developments of electron-positron colliders, storage rings, and gave important contributions to theoretical high energy physics. Storage rings, initially developed for high energy physics, are being widely used in many countries as synchrotron radiation sources and are a tool for research in physics, chemistry, biology environmental sciences and cultural heritage studies. We describe Touschek's life in Austria, where he was born, Germany, where he participated to the construction of a betatron during WWII, and Italy, where he proposed and led to completion the first electron-positron storage ring in 1960, in Frascati. We highlight how his central European culture influenced his life style and work, and his main contributions to physics, such as the discovery of the Touschek effect and beam instabilities in the larger storage ring ADONE.

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Section: Vi2 Contributions To Adone Accelerator Physicsmentioning

confidence: 94%

Bruno Touschek: From Betatrons to Electron–Positron Colliders

Bernardini

Pancheri

Pellegrini

2015

Rev. Accl. Sci. Tech.

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“…16.6, and the high energy physics experiment could start. The paper reporting these results, [11], ended recognizing in the acknowledgements Touschek's contributions to ADONE Fig. 16.6 ADONE Luminosity measurements with the scattering apparatus and three bunches per beam (full curve) at 1 GeV.…”

Section: Reaching Adone Design Luminositymentioning

confidence: 99%

“…But when we tried to increase the current to achieve the design current of 100 mA/beam, we encountered many unexpected effects generating sudden beam losses, limiting the current and the luminosity to values well below the design values and what was needed to do meaningful high energy physics experiments. Amman discussed the situation in a paper he presented at 1969 Particle Accelerator Conference [11]. In this paper he summarized our experience with ADONE initial commissioning: "ADONE, after the first year of troubleshooting (talking of a storage ring it would be better to say instability-shooting), should start high energy physics experiments during 1969.…”

Section: Commissioning Adonementioning

confidence: 99%

“…Errors are statistical, luminosity, left scale; i + -i − , right scale. The straight lines through the data are only indicative [11] success: "We are grateful for helpful discussions with many physicists of the Frascati Laboratories and of other laboratories; we are especially grateful to Prof. C. BERNARDINI, whose contribution has been very important in the design stage, and to Prof. B. TOUSCHEK for his brilliant ideas and for suffering with us through the instability problems. "…”

Section: Reaching Adone Design Luminositymentioning

confidence: 99%

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The Making of ADONE

Pellegrini

2023

Springer Proceedings in Physics

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We review the history, physics challenges and final success of the electron–positron 1.5 GeV collider ADONE, from its inception as Bruno Touschek’s brainchild to the beginning of elementary particle physics experiments. Many new problems were met along the road to the successful operation of ADONE, like the collective instability effects. These novel phenomena had to be understood and means to control them had to be found to reach ADONE design goals. Bruno contributed in many critical ways to a successful solution of these issues, leading the effort to make colliding beams the important particle physics instruments of discovery that they are today.

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“…The case of two cavities is considered in this analysis, one the main accelerating cavity and the other the frequencysplitting cavity. The energy gain per turn from these cavities for the synchronous particle in the mth bunch is given by tim=eVI sinkI (+LI+em+ @I) + eV2 sink2 (+L2+&+ 03, (1) where the subscripts one and two refer to the main accelerating and the frequency-splitting cavity respectively, and Ll=nr/kI with n integral. For convenience the phase 81 is chosen so that when V2=0 the position of the synchronous particle in the mth bunch is given by -L Pm=?, m=O, 1,2 .…”

Section: Introductionmentioning

confidence: 99%