Proceedings of International Conference on Particle Accelerators最新文献_第2页

Programmable electronic safety systems 可编程电子安全系统

Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.309276

R. Parry

{"title":"Programmable electronic safety systems","authors":"R. Parry","doi":"10.1109/PAC.1993.309276","DOIUrl":"https://doi.org/10.1109/PAC.1993.309276","url":null,"abstract":"Traditionally safety systems intended for protecting personnel from electrical and radiation hazards at particle accelerator laboratories have made extensive use of electromechanical relays. These systems have the advantage of high reliability and allow the designer to easily implement fail-safe circuits. Relay based systems are also typically simple to design, implement, and test. As systems, such as those presently under development at the Superconducting Super Collider Laboratory (SSCL), increase in size, and the number of monitored points escalates, relay based systems become cumbersome and inadequate. The move toward Programmable Electronic Safety Systems is becoming more widespread and accepted. In developing these systems there are numerous precautions the designer must be concerned with. Designing fail-safe electronic systems with predictable failure states is difficult at best. Redundancy and self-testing are prime examples of features that should be implemented to circumvent and/or detect failures. Programmable systems also require software which is yet another point of failure and a matter of great concern. Therefore the designer must be concerned with both hardware and software failures and build in the means to assure safe operation or shutdown during failures. This paper describes features that should be considered in developing safety systems and describes a system recently installed at the Accelerator Systems String Test (ASST) facility of the SSCL.<<ETX>>","PeriodicalId":128308,"journal":{"name":"Proceedings of International Conference on Particle Accelerators","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116970501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experience with the TRIUMF Main Tank Vacuum Control System 有使用TRIUMF主油箱真空控制系统的经验

Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.309176

S. Sarkar, J.C. Yandon, W. Sievers, P. Bennett, D. Gurd, P. Harmer, J. Nelson

{"title":"Experience with the TRIUMF Main Tank Vacuum Control System","authors":"S. Sarkar, J.C. Yandon, W. Sievers, P. Bennett, D. Gurd, P. Harmer, J. Nelson","doi":"10.1109/PAC.1993.309176","DOIUrl":"https://doi.org/10.1109/PAC.1993.309176","url":null,"abstract":"The TRIUMF Main Tank Vacuum Control System was upgraded in 1984. The earlier system, which consisted of a collection of hardwired relay logic boxes housed in three standard instrumentation racks, was replaced with a compact and flexible microprocessor-based control system. The user interface, previously distributed over the three racks, was consolidated into a single hardwired control and mimic panel. Since 1984, the Main Tank Vacuum System has undergone a series of changes in configuration and vacuum pumping hardware with necessary changes being implemented in the control system logic. Corresponding changes to the user interface were sometimes difficult to implement and in time exhausted the spare input/output capacity which had been built in to the panel. The availability of inexpensive personal computers with adequate graphics capability and the ease of modifying, or adding to a programmable user interface precipitated the retirement of the hardwired panel and its replacement by a PC-based graphics user interface. System configuration, safety considerations, the hardware and the software implementation using the 'C' programming language are described. The evolution of the control system and its performance, both over the years and in adapting to the vacuum system changes, are discussed.<<ETX>>","PeriodicalId":128308,"journal":{"name":"Proceedings of International Conference on Particle Accelerators","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117113426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Broadband higher-order mode (HOM) damper for SSC LEB ferrite-tuned cavity SSC LEB铁氧体调谐腔的宽带高阶模式阻尼器

Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.308676

L. Walling, G. Hulsey, T. Grimm

引用次数: 1

A new study of the Main Ring physical aperture 主环物理孔径的新研究

Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.309285

G. Wu, S. Pruss, D. Capista

引用次数: 0

The million turn date acquisition system BOSC 百万转日采集系统BOSC

Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.309302

A. Burns, W. Fischer, H. Jakob, I. Milsted, F. Schmidt, L. Vos

引用次数: 4

Infrared (IR) vs. X-ray power generation in the SLAC Linac Coherent Light Source (LCLS) SLAC直线加速器相干光源(LCLS)中的红外(IR)与x射线发电

Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.308553

R. Tatchyn

引用次数: 3

Automated testing of a high-power RF microwave tube 大功率射频微波管的自动测试

Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.308643

A. Young, D. Rees, A. Vergamini

引用次数: 0

Computer simulation and cold model testing of CCL cavities CCL型腔的计算机模拟及冷模试验

Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.308764

C.R. Chang, C. Yao, D. Swenson, L. Funk

引用次数: 7

Accelerator physics analysis with interactive tools 加速器物理分析与交互工具

Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.309009

J. Holt, L. Michelotti

引用次数: 1

Particle acceleration in extremely strong electromagnetic wave fields 粒子在极强电磁波场中的加速

Proceedings of International Conference on Particle Accelerators Pub Date : 1993-05-17 DOI: 10.1109/PAC.1993.308941

K. Thielheim

{"title":"Particle acceleration in extremely strong electromagnetic wave fields","authors":"K. Thielheim","doi":"10.1109/PAC.1993.308941","DOIUrl":"https://doi.org/10.1109/PAC.1993.308941","url":null,"abstract":"The present paper can be seen in the context of work on the origin of high energy cosmic ray particles. The plane-wave formalism without radiation reaction based on the Lorentz equation is adequate for the description of particle dynamics if the wave amplitude is of moderate strength. Particle motion then is periodic in velocity space so that there is an upper limit to particle energy. We have shown that the plane-wave formalism without radiation reaction also is a powerful tool to define and to calculate important features of particle dynamics in spherical wave fields. Among these features are the acceleration boundary, the plasma border and the law of asymptotic energy. In extremely strong wave fields the influence of radiation forces has to be taken into account. Motion under the influence of the radiation reaction is no longer periodic in velocity space. Particles, at least in principle, can achieve unlimited values of energy. This may be relevant for the cosmic particle acceleration to extremely high energies as, for example, in cosmic jets associated with rotating magnetized configurations. One may also think of man made jets constituted of laser beams connecting natural or artificial satellites. It is the intention of this paper to present and to discuss some results, which may be of interest in the above mentioned context.<<ETX>>","PeriodicalId":128308,"journal":{"name":"Proceedings of International Conference on Particle Accelerators","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125943540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1