Download or read book Quadrupole Magnet for the APS Advanced Photon Source Storage Ring written by and published by . This book was released on 1989 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: An asymmetric core geometry has been selected for the quadrupole magnets in the storage ring of the Advanced Photon Source (APS) in order to accommodate the vacuum chamber and photon beam pipes. The requirements of the position beam make it necessary that the magnet be able to produce a field gradient of 20-T/m with high accuracy. The design for this magnet has been fully developed in preparation for the construction of a prototype. Some unique features included in the design are described. Design choices are being validated by extensive magnetic-field calculations in both two and three dimensions. The results of these calculations are presented. 6 refs., 4 figs., 5 tabs.
Download or read book Computation of a Quadrupole Magnet for the APS Storage Ring written by and published by . This book was released on 1990 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The storage ring of the Advanced Photon Source will include 400 quadrupole magnets for focusing the beam. A prototype quadrupole has been designed, constructed, and measured. This paper describes the two- and three-dimensional (2-D and 3-D) field computations performed for this design. 2 refs., 6 figs., 1 tab.
Download or read book Magnetic Measurements of the Storage Ring Quadrupole Magnets for the 7 GeV Advanced Photon Source written by and published by . This book was released on 1993 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: The pre-production quadrupole magnet for the Advanced Photon Source (APS) storage ring has been used. The multipole coefficients meet the tolerance requirements. The field-gradient integrals are measured relative to a reference quadrupole. By using two laser beam units, the magnetic and geometrical axes of the magnet are aligned within 0.2 mrad. The dependencies of the sextupole coefficient and the magnetic center on the excitation current are corrected by shunting the magnetic potentials of the top and bottom yokes.
Download or read book Fabrication and Tests of Prototype Quadrupole Magnets for the Storage Ring of the Advanced Photon Source written by and published by . This book was released on 1991 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prototype quadrupole magnets for the APS storage ring have been fabricated and tested. Mechanical stability of the magnet poles and acceptable field quality have been achieved. Geometries of the pole-end bevels have been studied in order to simplify the design of the magnet end-plate. The field saturation at different segments of the magnet has been measured to evaluate the magnet efficiency. 3 refs., 4 figs., 2 tabs.
Download or read book Computation of a Quadrupole Magnet for the APS Storage Ring written by and published by . This book was released on 1990 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fabrication and Tests of Prototype Quadrupole Magnets for the Storage Ring of the Advanced Photon Source written by and published by . This book was released on 1991 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vibration Study of the APS Storage Ring 0 8 Meter Quadrupole Magnet written by J.A. Jendrzeijczyk and published by . This book was released on 1991 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of Magnet Power Supply Development for the APS Advanced Photon Source Storage Ring written by and published by . This book was released on 1989 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: To simplify installation and speed testing of the Advanced Photon Source (APS) storage ring magnets, vacuum chambers and magnet power supplies, a modular approach was developed. All but the dipole magnets are independently controlled. Pulse width modulated dc-to-dc converters are used to power the individual magnets, with 12-pulse power supplies providing the raw dc to the converters. A magnet support base is the heart of a module and may hold as many as 7 magnets with 8 individually powered coils. The dc-to-dc converters are part of each magnet base module. This paper will show the modular approach which is used for the storage ring magnet systems and will give the test results of the prototype topology for the dc-to-dc converters that are being built and tested to power 680 quadrupole and sextupole magnets. 4 refs., 11 figs., 1 tab.
Download or read book Performance of Quadrupole and Sextupole Magnets for the Advanced Photon Source Storage Ring written by S. H. Kim and published by . This book was released on 1993 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Statistical Analyses of the Magnet Data for the Advanced Photon Source Storage Ring Magnets written by and published by . This book was released on 1995 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The statistics of the measured magnetic data of 80 dipole, 400 quadrupole, and 280 sextupole magnets of conventional resistive designs for the APS storage ring is summarized. In order to accommodate the vacuum chamber, the curved dipole has a C-type cross section and the quadrupole and sextupole cross sections have 180° and 120° symmetries, respectively. The data statistics include the integrated main fields, multipole coefficients, magnetic and mechanical axes, and roll angles of the main fields. The average and rms values of the measured magnet data meet the storage ring requirements.
Download or read book Vibration Study of the APS Magnet Support Assemblies written by and published by . This book was released on 1990 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stability of the positron closed orbit is a requirement for successful operation of the Advanced Photon Source. The fact that vibration of the storage ring quadrupole magnets can lead to distortion of the positron closed orbit and to potentially unacceptable beam emittance growth provides the motivation for the subject studies. Low frequency vibrations can be controlled with steering magnets using feedback systems, provided the vibration amplitudes are within the dynamic range of the controllers. High frequency vibration amplitudes, on the other hand, are out of the range of the controller and, therefore must be limited to ensure the emittance growth will not exceed a prescribed value. Vibration criteria were developed based on the requirement that emittance growth be limited to 10 percent. Recognizing that the quadrupole magnets have the most significant effect, three different scenarios were considered: vibration of a single quadrupole within the storage ring, random vibration of all the quadrupoles in the ring, and the hypothetical case of a plane wave sweeping across the site and the quadrupoles following the motion of the plane wave. The maximum allowable peak vibration amplitudes corresponding to these three vibration scenarios are given. The criteria associated with the passage of a plane wave is dependent on wavelength, or, alternatively, on frequency given the wave speed. The wave speed used is that measured as a part of the geotechnical investigation at the APS site.
Download or read book Performance of Quadrupole and Sextupole Magnets for the Advanced Photon Source Storage Ring written by and published by . This book was released on 1993 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the magnetic measurement data of several production quadrupole and sextupole magnets for the storage ring of the Advanced Photon Source, the excitation efficiencies and systematic and random multipole coefficients of the magnets are summarized. The designs of the magnets, which are constrained due to the geometry of the vacuum chamber have rotation symmetries of 180° and 120°. The production data meet the allowed tolerances of a few parts in 10−4 for the storage ring.
Download or read book Memorial of the Printers and Booksellers of Glasgow Most Humbly Addressed to the Honourable the House of Commons Assembled in Parliament written by and published by . This book was released on 1774 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magnetic Measurement Data of the 0 8 m Prototype Quadrupole Magnets for the APS Storage Ring written by and published by . This book was released on 1995 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: From magnetic measurement data of the two 0.8-m prototype quadrupole magnets (P-SRQ-1 and P-SRQ-2) and the study of the geometries for the pole-end bevels and pole chamfers, the following conclusions have been made. Mechanical stability of the magnet poles has been achieved by modification of the weld procedures between two quadrants of the magnets. Stability of the magnet-pole positions was measured optically and was also concluded from the fact that the allowed coefficients, mainly sextupole and octupole terms, were independent of the magnet excitation currents. Unallowed multipole field coefficients for the second magnet, without correction of the magnet-pole positions, are smaller than for the first magnet. The field gradient integrals of the two magnets at 400A differ by less than 5 x 10−4 for r = 2.5 cm. This indicates that an acceptable magnet assembly procedure has been established. The 2-D calculations and ''body'' measurements for allowed coefficients after the main field, b5 and b9, agree within 1.2 x 10−4 at r = 2.5 cm. This implies that the 2-D design geometry is basically correct and acceptable. As expected for a magnet with long and narrow poles, saturation effects of pole shims have been observed. In order to reduce fabrication cost for the end-plates, the geometries for the pole-end bevels and pole chamfers have been studied. By choosing a bevel angle of 61°, instead of 45°, it is possible to have acceptable allowed coefficients with dimensions of pole-chamfers up to 16.5 mm. This allows the design of the end-plate as one piece without removable pole-tip.
Download or read book Design and Measurement of the Sextupole Magnet for the APS Storage Rings written by and published by . This book was released on 1993 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: A prototype sextuple magnet has been designed, constructed, and measured for the storage ring of the Advanced Photon Source. The design approaches very closely to 120° rotation symmetry, in order to minimize all forbidden multipole components. The core is made of three identical stacks of laminations, each lamination consisting of two poles and the return yoke joining them. The antechamber of the thick aluminum vacuum chamber fits between two neighboring stacks. Computations and measurements of the sextupole strength B′′ and multipole field components, both in the central region and integrated in the beam direction, show that the magnets meets the requirements for positron beam dynamics.
Download or read book Vibration Considerations in the Design of the Advanced Photon Source at Argonne National Laboratory written by and published by . This book was released on 1991 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Advanced Photon Source (APS), a new synchrotron radiation facility being built at Argonne National Laboratory, will provide the world's most brilliant X-ray beams for research in a wide range of technical fields. Successful operation of the APS requires an extremely stable positron closed orbit. Vibration of the storage ring quadrupole magnets, even in the submicron range, can lead to distortion of the positron closed orbit and to potentially unacceptable beam emittance growth, which results in degraded performance. This paper presents an overview of the technical approach used to minimize vibration response, beginning at the conceptual stage, through design and construction, and on to successful operation. Acceptance criteria relating to maximum allowable quadrupole magnet vibration are discussed. Soil properties are used to determine resonant frequencies of foundations and to predict attenuation characteristics. Two sources are considered to have the potential to excite the foundation: far-field sources, which are produced external to the facility, and near-field sources, which are produced within the facility. Measurements of ambient ground motion, monitored to determine far- field excitation, are presented. Ambient vibration was measured at several operating facilities within Argonne to gain insight on typical near-field excitation sources. Discussion covers the dynamic response characteristics of a prototypic magnet support structure to various excitations, including ambient floor motion, coolant flow, and magnet power. 19 refs., 10 figs., 5 tabs.
