Recent Beam Measurements And New Instrumentation At The Advanced Light Source
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Recent Beam Measurements And New Instrumentation At The Advanced Light Source
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Author :
language : en
Publisher:
Release Date : 2012
Recent Beam Measurements And New Instrumentation At The Advanced Light Source written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
The Advanced Light Source (ALS) in Berkeley was the first of the soft x-ray third generation light source ever built, and since 1993 has been in continuous and successful operation serving a large community of users in the VUV and soft x-ray community. During these years the storage ring underwent through several important upgrades that allowed maintaining the performance of this veteran facility at the forefront. The ALS beam diagnostics and instrumentation have followed a similar path of innovation and upgrade and nowadays include most of the modem and last generation devices and technologies that are commercially available and used in the recently constructed third generation light sources. In this paper we will not focus on such already widely known systems, but we will concentrate our effort in the description of some measurements techniques, instrumentation and diagnostic systems specifically developed at the ALS and used during the last few years.
Beam Measurements And Upgrade At Bl 7 2 The Second Diagnosticsbeamline Of The Advanced Light Source
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Author : Michael C. Martin
language : en
Publisher:
Release Date : 2005
Beam Measurements And Upgrade At Bl 7 2 The Second Diagnosticsbeamline Of The Advanced Light Source written by Michael C. Martin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Beamline 7.2 of the Advanced Light Source (ALS) at theLawrence Berkeley National Laboratory (LBNL) is a beam diagnostics systemthat uses the synchrotron radiation emitted by a dipole magnet. Itconsists of two branches; in the first one the x-ray portion of theradiation is used in a pinhole camera system for measuring the transverseprofile of the beam. The second branch is equipped with an x-ray beamposition monitor (BPM) and with a multipurpose port where the visible and the far-infrared part of the radiation can be used for variousapplications such as bunch length measurements and IR coherentsynchrotron radiation experiments. The pinhole system has been operatingsuccessfully since the end of 2003. The installation of the second branchhas been completed recently and the results of its commissioning arepresented in this paper together with examples of beam measurementsperformed at BL 7.2.
Advanced Light Source Instrumentation Overview
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Author :
language : en
Publisher:
Release Date : 1992
Advanced Light Source Instrumentation Overview written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
The accelerator instrumentation played a vital role in commissioning the ALS injector accelerator. It helped us to see whether electron dynamics agreed with our theoretical predictions and important beam parameters met the design specifications. It helped us to see where beam losses occurred and why. In this paper we will start with a brief description of the ALS accelerator complex and the expected performance of it. Then we will describe each diagnostics instrument by its construction, operational principle, requirements, and our experiences with it. We will describe the wall current monitor, the scintillator, the Faraday cup, the beam collimator, the beam position monitor, the direct-current current transformer (DCCT), the traveling wave electrodes the Sabersky finger, and other special instruments. Finally, we will go into some detail on how we measured the beam emittances, the closed orbit, and the betatron tunes.
Remote Synchrotron Light Instrumentation Using Optical Fibers
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Author :
language : en
Publisher:
Release Date : 2009
Remote Synchrotron Light Instrumentation Using Optical Fibers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
By coupling the emitted synchrotron light into an optical fiber, it is possible to transmit the signal at substantial distances from the light port, without the need to use expensive beamlines. This would be especially beneficial in all those cases when the synchrotron is situated in areas not easily access because of their location, or due to high radiation levels. Furthermore, the fiber output can be easily switched, or even shared, between different diagnostic instruments. We present the latest results on the coupling and dispersion measurements performed at the Advanced Light Source in Berkeley. In several cases, coupling synchrotron light into optical fibers can substantially facilitate the use of beam diagnostic instrumentation that measures longitudinal beam properties by detecting synchrotron radiation. It has been discussed in with some detail, how fiberoptics can bring the light at relatively large distances from the accelerator, where a variety of devices can be used to measure beam properties and parameters. Light carried on a fiber can be easily switched between instruments so that each one of them has 100% of the photons available, rather than just a fraction, when simultaneous measurements are not indispensable. From a more general point of view, once synchrotron light is coupled into the fiber, the vast array of techniques and optoelectronic devices, developed by the telecommunication industry becomes available. In this paper we present the results of our experiments at the Advanced Light Source, where we tried to assess the challenges and limitations of the coupling process and determine what level of efficiency one can typically expect to achieve.
Observations Of Collective Effects At The Advanced Light Source
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Author :
language : en
Publisher:
Release Date : 1995
Observations Of Collective Effects At The Advanced Light Source written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
We present a summary of measurements of single beam collective effects in the Advanced Light Source (ALS). We describe measurements of coupled-bunch instabilities, including some recent results using the newly commissioned feedback systems and the results of an initial search for the fast ion instability. Single bunch effects include bunch lengthening, energy spread increase, HOM loss measurements, head-tail damping rates, current dependent tune shifts, and transverse mode coupling instability threshold. The longitudinal measurements are consistent with a broadband impedance {vert_bar}?{sub {parallel}}/?{vert_bar}{sub eff} = 0.22±0.07? and transverse measurements indicate broadband impedances of?{sub y, eff} = 155 k?/m and Z{sub x, eff} = 58 k?/m.
Ewing S Analytical Instrumentation Handbook Fourth Edition
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Author : Nelu Grinberg
language : en
Publisher: CRC Press
Release Date : 2019-02-21
Ewing S Analytical Instrumentation Handbook Fourth Edition written by Nelu Grinberg and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-02-21 with Medical categories.
This handbook is a guide for workers in analytical chemistry who need a starting place for information about a specific instrumental technique. It gives a basic introduction to the techniques and provides leading references on the theory and methodology for an instrumental technique. This edition thoroughly expands and updates the chapters to include concepts, applications, and key references from recent literature. It also contains a new chapter on process analytical technology.
Dynamic Aperture Measurements At The Advanced Light Source
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Author :
language : en
Publisher:
Release Date : 1999
Dynamic Aperture Measurements At The Advanced Light Source written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
A large dynamic aperture for a storage ring is of importance for long lifetimes and a high injection efficiency. Measurements of the dynamic aperture of the third generation synchrotron light source Advanced Light Source (ALS) using beam excitation with kicker magnets are presented. The experiments were done for various accelerator conditions, allowing us to investigate the influence of different working points, chromaticities, insertion devices, etc. The results are compared both with tracking calculations and a simple model for the dynamic aperture yielding good agreements. This gives us confidence in the predictability of the nonlinear accelerator model. This is especially important for future ALS upgrades as well as new storage ring designs.
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1995
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Power resources categories.
A Second Beam Diagnostic Beamline For The Advanced Lightsource
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Author : Nicholas Kelez
language : en
Publisher:
Release Date : 2003
A Second Beam Diagnostic Beamline For The Advanced Lightsource written by Nicholas Kelez and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
A second beamline, BL 7.2, completely dedicated to beam diagnostics is being installed at the Advanced Light Source (ALS). The design has been optimized for the measurement of the momentum spread and emittance of the stored beam in combination with the existing diagnostic beamline, BL 3.1. A detailed analysis of the experimental error has allowed the definition of the system parameters. The obtained requirements found a good matching with a simple and reliable system based on the detection of X-ray synchrotron radiation (SR) through a pinhole system. The actual beamline, which also includes a port for visible and infrared SR as well as an X-ray beam position monitor (BPM), is mainly based on the design of two similar diagnostic beamlines at BESSY II. This approach allowed a significant saving in time, cost and engineering effort. The design criteria, including a summary of the experimental error analysis, as well as a brief description of the beamline are presented.
Analysis Of Insertion Device Magnet Measurements For The Advanced Light Source
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Author :
language : en
Publisher:
Release Date : 1993
Analysis Of Insertion Device Magnet Measurements For The Advanced Light Source written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
The Advanced Light Source (ALS), which is currently being commissioned at Lawrence Berkeley Laboratory, is a third generation light source designed to produce XUV radiation of unprecedented brightness. To meet the high brightness goal the storage ring has been designed for very small electron beam emittance and the undulators installed in the ALS are built to a high degree of precision. The allowable magnetic field errors are driven by electron beam and radiation requirements. Detailed magnetic measurements and adjustments are performed on each undulator to qualify it for installation in the ALS. The first two ALS undulators, IDA and IDB, have been installed. This paper describes the program of measurements, data analysis, and adjustments carried out for these two devices. Calculations of the radiation spectrum, based upon magnetic measurements, are included. Final field integral distributions are also shown. Good field integral uniformity has been achieved using a novel correction scheme, which is also described.