Download or read book A High precision Polarimeter written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors have built a polarimeter in order to measure the electron beam polarization in hall C at Jefferson Lab. Using a superconducting solenoid to drive the pure-iron target foil into saturation, and a symmetrical setup to detect the Moller electrons in coincidence, they achieve an accuracy of
Download or read book A New High Precision Photoelectronic Universal Polarimeter written by Jerome M. Weingart and published by . This book was released on 1961 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Precision Electron Beam Polarization Measurement with Compton Polarimetry at Jefferson Laboratory written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Since 1999, a Compton polarimeter based on a Fabry-Perot cavity to amplify the laser light is operational in the hall A of the Jefferson Laboratory. In 2000, the beam polarization has been continuously measured during N â Delta and Gep experiment providing a relative total uncertainty of 1.4% in 40 mn at 4.5 GeV. These unprecedented results have been obtained thanks to a scattered electron detector which has allowed to determine the response function of the photon calorimeter.
Download or read book An Overview of Electron Polarimeters and an Intercomparison written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron beam polarimetry may be described as the technique of separating scattered particles for detection using some physical interaction between the polarization of the electron beam and the total analyzing power of a target. The target is itself polarized in many polarimeter designs. A careful intercomparison of the relative analyzing power of five electron beam polarimeters was performed at the laboratory during a dedicated two day machine development period. A Wien-style spin manipulator at the injector was used to vary the spin orientation of the electron beam at each polarimeter. A series of measurements as a function of spin orientation provides determination of the relative analyzing power of each polarimeter, and more importantly, quantifies the instrumental systematics that help realize high precision absolute electron polarimetry. In addition, a comparison of the value of the injector spin angle that provides precise longitudinal beam polarization at each experimental hall leads to an independent and potentially high precision absolute measurement (dE/E (almost equal to) 10−4) of the final electron beam energy. Discussion of the experiment will be presented.
Download or read book Unique Electron Polarimeter Comparison and Spin based Energy Measurement written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A careful intercomparison of the relative analyzing power of five electron beam polarimeters was performed at Jefferson Lab during a dedicated two day machine development period. This is the first time such a comparison between Mott, Compton, and Moller polarimeters has been made. A Wien-style spin manipulator at the injector was used to vary the spin orientation of the electron beam at each polarimeter. A series of measurements as a function of spin orientation provides determination of the relative analyzing power of each polarimeter, and more importantly, quantifies the instrumental systematics which help realize high precision absolute electron polarimetry. In addition, a comparison of the value of the injector spin angle that. provides precise longitudinal beam polarization at each experimental hall leads to an independent and potentially high precision measurement (dE/E = 10-5) of the final electron beam energy. Results and discussion of the tests of the polarimeters and energy measurement will be presented.
Download or read book Instrument Systems for Imaging Spectro polarimetry written by Alex J. Feller and published by Cuvillier Verlag. This book was released on 2008 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interstellar Boundary Explorer IBEX written by David McComas and published by Springer. This book was released on 2014-06-18 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: over to nominal operations and began making our groundbreaking science observations. Remarkably, the IBEX project was able to do all this work including developing an entirely new launch capability, building and ying a unique and highly specialized spacecraft and instrument suite, and maintaining full funding for our Education and Public Outreach and Phase E science activities, while still under-running our original cost cap (as modi ed by NASA-directed changes), by roughly three-quarters of a million dollars. This book comprises a set of papers that describe the IBEX science, instruments, and mission and put these in the context of the existing knowledge of the interstellar interaction at the time of the launch. The book sets the stage for research that will be based on data from the IBEX mission. We sincerely hope that future researchers, authors and students will use this information to help in their studies. Chapter 1 [McComas et al. ] provides an overview of the entire IBEX program including the IBEX science, hardware, and mission. Chapter 2 describes the IBEX spacecraft and ight system [Scherrer et al. ]. Chapters 3–4 provide the details of the IBEX-Hi instrument [Funsten et al. ] and background monitor that is built into it [Allegrini et al. ], while Chapters 5–7 describe the IBEX-Lo instrument [Fuselier et al. ], how IBEX-Lo can measure the interstellar neutrals directly entering the heliosphere [Möbius et al.
Download or read book Polarimetry of Stars and Planetary Systems written by Ludmilla Kolokolova and published by Cambridge University Press. This book was released on 2015-05-14 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarising the striking advances of the last two decades, this reliable introduction to modern astronomical polarimetry provides a comprehensive review of state-of-the-art techniques, models and research methods. Focusing on optical and near-infrared wavelengths, each detailed, up-to-date chapter addresses a different facet of recent innovations, including new instrumentation, techniques and theories; new methods based on laboratory studies, enabling the modelling of polarimetric characteristics for a wide variety of astronomical objects; emerging fields of polarimetric exploration, including proto-planetary and debris discs, icy satellites, transneptunian objects, exoplanets, and the search for extraterrestrial life; and unique results produced by space telescopes, and polarimeters aboard exploratory spacecraft. With contributions from an international team of accomplished researchers, this is an ideal resource for astronomers and researchers working in astrophysics, earth sciences, and remote sensing keen to learn more about this valuable diagnostic tool. The book is dedicated to the memory of renowned polarimetrist Tom Gehrels.
Download or read book Observational Astrophysics with High Precision Data written by and published by . This book was released on 1988 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Beam Polarization at the ILC written by and published by . This book was released on 2011 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this contribution accelerator solutions for polarized beams and their impact on physics measurements are discussed. Focus are physics requirements for precision polarimetry near the interaction point and their realization with polarized sources. Based on the ILC baseline programme as described in the Reference Design Report (RDR), recent developments are discussed and evaluated taking into account physics runs at beam energies between 100 GeV and 250 GeV, as well as calibration runs on the Z-pole and options as the 1TeV upgrade and GigaZ. The studies, talks and discussions presented at this conference demonstrated that beam polarization and its measurement are crucial for the physics success of any future linear collider. To achieve the required precision it is absolutely decisive to employ multiple devices for testing and controlling the systematic uncertainties of each polarimeter. The polarimetry methods for the ILC are complementary: with the upstream polarimeter the measurements are performed in a clean environment, they are fast and allow to monitor time-dependent variations of polarization. The polarimeter downstream the IP will measure the disrupted beam resulting in high background and much lower statistics, but it allows access to the depolarization at the IP. Cross checks between the polarimeter results give redundancy and inter-calibration which is essential for high precision measurements. Current plans and issues for polarimeters and also energy spectrometers in the Beam Delivery System of the ILC are summarized in reference [28]. The ILC baseline design allows already from the beginning the operation with polarized electrons and polarized positrons provided the spin rotation and the fast helicity reversal for positrons will be implemented. A reversal of the positron helicity significantly slower than that of electrons is not recommended to not compromise the precision and hence the success of the ILC. Recently to use calibration data at the Z resonance for physics has been discussed. It looks promising but further studies are needed to evaluate and to optimize these measurements. Finally it should be remarked: many studies on different physics processes and scenarios at a future linear collider are done for high luminosities and high energy assuming small and well-known uncertainties. Polarization, especially positron polarization, is often considered as not that important. But in order to interpret data and to reduce ambiguities in the measurements, the polarization of electrons and positrons and their very precise knowledge are essential. The ILC design must offer this from the beginning to be prepared for the physics questions after years of LHC operation.
Download or read book High Precision Polarimetry of the Sun written by Achim Gandorfer and published by Cuvillier Verlag. This book was released on 2001 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stellar Polarimetry written by David Clarke and published by John Wiley & Sons. This book was released on 2009-10-30 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by an experienced teacher and author, this must-have source for work with polarimetric equipment and polarimetry in astronomy conveys the knowledge of the technology and techniques needed to measure and interpret polarizations. As such, this monograph offers a brief introduction and refresher, while also covering in detail statistics and data treatment as well as telescope optics. For astronomers, physicists and those working in the optical industry.
Download or read book Development of a High cadence High precision Solar Imaging Polarimeter with Application to the FSP Prototype written by Francisco Iglesias and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book THE DEVELOPMENT OF A NEW POSITRON POLARIMETER AND THE PRECISION MEASUREMENT OF THE POLARIZATION OF POSITRONS FROM THE DECAY OF SODIUM 22 written by MARK A. SKALSEY and published by . This book was released on 1982 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: uncertainties affecting the polarimeter system is presented including estimates, calculations, and measurements of all known effects. As a feasibility test of the polarimeter operation, the longitudinal polarization of positrons in ('22)Na decay was measured relative to ('68)Ga, which served as a "normalizing" source, with the result:
Download or read book A High Accuracy Universal Polarimeter for Crystal Optics Research written by J. R. L. Moxon and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electronic Engineering written by Dongxing Wang and published by CRC Press. This book was released on 2018-07-27 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 4th International Conference of Electronic Engineering and Information Science 2017 (ICEEIS2017) was held January 7-8, 2017 in Haikou, P.R. China. This conference was sponsored by the Harbin University of Science and Technology, China. The conference continued the tradition of gathering world-class researchers, engineers and educators engaged in the fields of electronic engineering and information science to meet and present their latest activities. The proceedings contains contributions in the fields of Electronic Engineering, Information Science and Information Technologies, Computational Mathematics and Data Mining, Mechatronics, Control and Automation and Material Science and Technologies of Processing.
Download or read book Polarimetric Detection Characterization and Remote Sensing written by Michael I. Mishchenko and published by Springer. This book was released on 2011-05-27 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the need for accurate and non-invasive optical characterization and diagnostic techniques is rapidly increasing, it is imperative to find improved ways of extracting the additional information contained within the measured parameters of the scattered light. This is the first specialized monograph on photopolarimetry, a rapidly developing, multidisciplinary topic with numerous military, ecological remote-sensing, astrophysical, biomedical, and technological applications. The main objective is to describe and discuss techniques developed in various disciplines to acquire useful information from the polarization signal of scattered electromagnetic waves. It focuses on the state-of-the-art in polarimetric detection, characterization, and remote sensing, including military and environmental monitoring as well as terrestrial, atmospheric, and biomedical characterization. The book identifies polarimetric techniques that have been especially successful for various applications as well as the future needs of the various research communities. The monograph is intended to facilitate cross-pollination of ideas and thereby improve research efficiency and help advance the field of polarimetry into the future. The book is thoroughly interdisciplinary and contains only invited review chapters written by leading experts in the respective fields. It will be useful to science professionals, engineers, and graduate students working in a broad range of disciplines: optics, electromagnetics, atmospheric radiation and remote sensing, radar meteorology, oceanography, climate research, astrophysics, optical engineering and technology, particle characterization, and biomedical optics.
