摘要:

A survey of colliding beam facilities throughout the world is presented. Information on instrumentation, beam luminosity, and energy ranges is included. (AIP)

ISSN:0094-243X    

DOI:10.1063/1.32109

出版商:AIP    

年代:1980

数据来源: AIP

摘要:

The angular deflection of intersecting beams due to their classical electromagnetic interaction is calculated. (pp) and (ete´) machines are considered. (AIP)

ISSN:0094-243X    

DOI:10.1063/1.32112

出版商:AIP    

年代:1980

数据来源: AIP

摘要:

Two categories of theoretical models for the beam‐beam interaction are reviewed: the linear‐lens models and the single‐resonance models. In a linear‐lens model, the beam‐beam force is linearized and represented by a localized linear lens. Analyses of incoherent single particle effects can be performed exactly in these models by using matrix techniques. Although the results do not agree with the experimental observations in many respects, the linear‐lens models constitute a starting point of our understanding of the beam‐beam interaction. In the single‐resonance models, one is concerned with the possible incoherent instabilities as the betatron tune of some of the particles is close to a certain rational number. It is assumed in these models that one and only one such rational number dominates the single‐particle beam‐beam effects. It is found that static single resonances cannot explain many of the experimental results. Some attempts have been made to modify the static single‐resonance theory by including some mechanisms for diffusive tune fluctuations or periodic tune modulations. These modified single‐resonance models have met only with some limited qualitative success.

ISSN:0094-243X    

DOI:10.1063/1.32116

出版商:AIP    

年代:1980

数据来源: AIP

摘要:

At the ISR, an extensive theoretical and experimental program on the beam‐beam interactions has been carried out. For coasting beams, analytical developed and checked experimentally. Other theories, such as for Arnold diffusion, stochasticity and migration due to adiabatic change of the parameters have also been studied experimentally. The resonance theory has been generalized to the case of bunched beams, and the resonances due to the so‐called beam‐beam overlap knock‐out have been observed in some detail. The present paper tries to summarize this work and to give the most interesting experimental results.

ISSN:0094-243X    

DOI:10.1063/1.32117

出版商:AIP    

年代:1980

数据来源: AIP

摘要:

The perturbing action of the electromagnetic field of one beam on the trajectory of the other is studied at spear. (AIP)

ISSN:0094-243X    

DOI:10.1063/1.32118

出版商:AIP    

年代:1980

数据来源: AIP

摘要:

We have analyzed the results which give the functional dependences of some important machine parameters. The data have been taken from machine physics experiments carried out during the period December 1977 to October 1978, and from records of the operation runs.

ISSN:0094-243X    

DOI:10.1063/1.32119

出版商:AIP    

年代:1980

数据来源: AIP

摘要:

Measurements of the limits on the beam luminosity at DORIS and PETRA due to the beam‐beam interaction are presented. (AIP)

ISSN:0094-243X    

DOI:10.1063/1.32103

出版商:AIP    

年代:1980

数据来源: AIP

摘要:

The results of hundreds of runs with two strong beams and with one strong and one weak beam are described in terms of beam luminosity. (AIP)

ISSN:0094-243X    

DOI:10.1063/1.32104

出版商:AIP    

年代:1980

数据来源: AIP

摘要:

Beam‐beam interactions at Orsay are studied on both ACO and DnI. (AIP)

ISSN:0094-243X    

DOI:10.1063/1.32105

出版商:AIP    

年代:1980

数据来源: AIP

摘要:

A study is made of a model for the beam‐beam interaction in ISABELLE using numerical methods and the recently developed method of Transfer Maps. It is found that analytical transfer map calculations account qualitatively for all the features of the model obtions account qualitatively for all the features of the model observed numerically, and show promise of giving quantitive agreement as well. They may also provide a kind of ’’magnifying glass’’ for examining numerical results in fine detail to ascertain the presence of small scale stochastic motion that might lead to eventual particle loss. Preliminary evidence is presented to the effect that within the model employed, the beam‐beam interaction at its contemplated strengths should not lead to particle loss in ISABELLE.

ISSN:0094-243X    

DOI:10.1063/1.32106

出版商:AIP    

年代:1980

数据来源: AIP