Low Level Radio Frequency Systems
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Low Level Radio Frequency Systems
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Author : Stefan Simrock
language : en
Publisher: Springer Nature
Release Date : 2022-03-02
Low Level Radio Frequency Systems written by Stefan Simrock and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-03-02 with Science categories.
This book begins with an overview of the RF control concepts and strategies. It then introduces RF system models for optimizing the system parameters to satisfy beam requirements and for controller design. In addition to systematically discussing the RF field control algorithms, it presents typical architecture and algorithms for RF signal detection and actuation. Further, the book addresses the analysis of the noise and nonlinearity in LLRF systems to provide a better understanding of the performance of the RF control system and to specify the performance requirements for different parts of the RF system. Today, accelerators require increased RF stability and more complex operation scenarios, such as providing beam for different beam lines with various parameters, and as a result LLRF systems are becoming more critical and complex. This means that LLRF system developers need have extensive knowledge of the entire accelerator complex and a wide range of other areas, including RF and digital signal processing, noise analysis, accelerator physics and systems engineering. Providing a comprehensive introduction to the basic theories, algorithms and technologies, this book enables LLRF system developers to systematically gain the knowledge required to specify, design and implement LLRF systems and integrate them with beam acceleration. It is intended for graduate students, professional engineers and researchers in accelerator physics.
Radio Frequency Station Beam Dynamics Interaction In Circular Accelerators
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Author : Themistoklis Mastoridis
language : en
Publisher: Stanford University
Release Date : 2005
Radio Frequency Station Beam Dynamics Interaction In Circular Accelerators written by Themistoklis Mastoridis and has been published by Stanford University this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
The longitudinal beam dynamics in circular accelerators is mainly defined by the interaction of the beam current with the accelerating Radio Frequency (RF) stations. For stable operation, Low Level RF (LLRF) feedback systems are employed to reduce coherent instabilities and regulate the accelerating voltage. The LLRF system design has implications for the dynamics and stability of the closed-loop RF systems as well as for the particle beam, and is very sensitive to the operating range of accelerator currents and energies. Stability of the RF loop and the beam are necessary conditions for reliable machine operation. This dissertation describes theoretical formalisms and models that determine the longitudinal beam dynamics based on the LLRF implementation, time domain simulations that capture the dynamic behavior of the RF station-beam interaction, and measurements from the Positron-Electron Project (PEP-II) and the Large Hadron Collider (LHC) that validate the models and simulations. These models and simulations are structured to capture the technical characteristics of the system (noise contributions, non-linear elements, and more). As such, they provide useful results and insight for the development and design of future LLRF feedback systems. They also provide the opportunity to study diverse longitudinal beam dynamics effects such as coupled-bunch impedance driven instabilities and single bunch longitudinal emittance growth. Coupled-bunch instabilities and RF station power were the performance limiting effects for PEP-II. The sensitivity of the instabilities to individual LLRF parameters, the effectiveness of alternative operational algorithms, and the possible tradeoffs between RF loop and beam stability were studied. New algorithms were implemented, with significant performance improvement leading to a world record current during the last PEP-II run of 3212 mA for the Low Energy Ring. Longitudinal beam emittance growth due to RF noise is a major concern for LHC. Simulations studies and measurements were conducted that clearly show the correlation between RF noise and longitudinal bunch emittance, identify the major LLRF noise contributions, and determine the RF component dominating this effect. With these results, LHC upgrades and alternative algorithms are evaluated to reduce longitudinal emittance growth during operations. The applications of this work are described with regard to future machines and analysis of new technical implementations, as well as to possible future work which would continue the directions of this dissertation.
Broadband Direct Rf Digitization Receivers
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Author : Olivier Jamin
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-09-06
Broadband Direct Rf Digitization Receivers written by Olivier Jamin and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-09-06 with Technology & Engineering categories.
This book discusses the trade-offs involved in designing direct RF digitization receivers for the radio frequency and digital signal processing domains. A system-level framework is developed, quantifying the relevant impairments of the signal processing chain, through a comprehensive system-level analysis. Special focus is given to noise analysis (thermal noise, quantization noise, saturation noise, signal-dependent noise), broadband non-linear distortion analysis, including the impact of the sampling strategy (low-pass, band-pass), analysis of time-interleaved ADC channel mismatches, sampling clock purity and digital channel selection. The system-level framework described is applied to the design of a cable multi-channel RF direct digitization receiver. An optimum RF signal conditioning, and some algorithms (automatic gain control loop, RF front-end amplitude equalization control loop) are used to relax the requirements of a 2.7GHz 11-bit ADC. A two-chip implementation is presented, using BiCMOS and 65nm CMOS processes, together with the block and system-level measurement results. Readers will benefit from the techniques presented, which are highly competitive, both in terms of cost and RF performance, while drastically reducing power consumption.
Radio Frequency System Architecture And Design
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Author : John W. M. Rogers
language : en
Publisher: Artech House
Release Date : 2013-10-01
Radio Frequency System Architecture And Design written by John W. M. Rogers and has been published by Artech House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-01 with Technology & Engineering categories.
Communication devices such as smart phones, GPS systems, and Bluetooth, are now part of our daily lives more than ever before. As our communication equipment becomes more sophisticated, so do the radios and other hardware required to enable that technology. Common radio architectures are required to make this technology work seamlessly. This resource describes practical aspects of radio frequency communications systems design, bridging the gap between system-level design considerations and circuit-level design specifications. Industry experts not only provide detailed calculations and theory to determine block level specifications, but also discuss basic theory and operational concepts. This resource also includes extensive, up-to-date application examples.
Introduction To Radio Frequency Design
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Author : Wesley H. Hayward
language : en
Publisher: American Radio Relay League (ARRL)
Release Date : 1994
Introduction To Radio Frequency Design written by Wesley H. Hayward and has been published by American Radio Relay League (ARRL) this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Technology & Engineering categories.
The fundamental methods of radio frequency design using mathematics to develop intuition for RF circuits and systems are explained here with an emphasis on applications of simple circuit models. The book prepares readers to actually design HF, VHF and UHF equipment.
Digital Low Level Radio Frequency Control And Microphonics Mitigation Of Superconducting Cavities
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Author : Nathanael Robert Usher
language : en
Publisher:
Release Date : 2007
Digital Low Level Radio Frequency Control And Microphonics Mitigation Of Superconducting Cavities written by Nathanael Robert Usher and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Cavity resonators categories.
An Assessment Of Potential Health Effects From Exposure To Pave Paws Low Level Phased Array Radiofrequency Energy
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 2005-07-09
An Assessment Of Potential Health Effects From Exposure To Pave Paws Low Level Phased Array Radiofrequency Energy written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-07-09 with Science categories.
PAVE PAWS is a phased-array warning system designed to detect and track sea-launched and intercontinental ballistic missiles operated on Cape Cod since 1979 by the U.S. Air Force Space Command. In 1979, the National Research Council issued two reports to address concerns from Cape Cod residents about the safety and possible health effects of the radiofrequency energy from the radar. Following up on the1979 report, the new report finds no evidence of adverse health effects to Cape Cod residents from long-term exposure to the PAVE PAWS radar. The report specifically investigated whether the PAVE PAWS radar might be responsible in part for the reported higher rates of certain cancers in the area, but concludes there is no increase in the total number of cancers or in specific cancers of the prostate, breast, lung, or colon due to radiation exposure from PAVE PAWS. The report did find in the scientific literature a few biological responses to radiofrequency exposures that were statistically significant. Such responses do not necessarily result in adverse health effects, but the report recommends additional studies to better discern the significance, if any, of those findings.
Rf Systems Circuits And Components
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Author : Mamun Bin Ibne Reaz
language : en
Publisher: BoD – Books on Demand
Release Date : 2019-03-27
Rf Systems Circuits And Components written by Mamun Bin Ibne Reaz and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-03-27 with Technology & Engineering categories.
Radio frequency (RF) refers to frequencies between the upper limit of audio frequencies (> 20 KHz) and the lower limit of infrared frequencies (
Telecommunications
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Author : DIANE Publishing Company
language : en
Publisher: DIANE Publishing
Release Date : 1995-04
Telecommunications written by DIANE Publishing Company and has been published by DIANE Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995-04 with Technology & Engineering categories.
Physics Of Particle Accelerators
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Author : Margaret Dienes
language : en
Publisher:
Release Date : 1989
Physics Of Particle Accelerators written by Margaret Dienes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Batavia, IL categories.