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in subjects: "Synchrotron Radiation Sources"

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The U5. 0 undulator design for the advanced light source at LBL

The U5.0 undulator, currently under design, is the first in a series of insertion devices planned for the Advanced Light Source at LBL. U5.0 parameters include a 5 cm period, 5 m length with a 0.837 T maximum field at a 14 mm gap. A hybrid configuration utilizing Nd-Fe-B permanent magnet material and Vanadium Permendur poles is used for the magnetic structure. Construction is modular with many pole assemblies attached to a pole mount, which in turn is fastened onto one of the backing beams. Ver… more

Date: August 1, 1989

Creator: Hoyer, E.; Chin, J.; Halbach, K.; Hassenzahl, W.; Humphries, D.; Kincaid, B. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Optical design and performance of the X25 hybrid wiggler beam line at the NSLS

The X25 beam line at the National Synchrotron Light Source (NSLS) began full-power commissioning in 1990. It extracts radiation from a 27 pole hybrid wiggler, which produces up to 1.8 kW of total power with a peak horizontal density of 450 W/mrad and critical energy of 4.6 keV. The design and performance of the beam line optics are described, in particular the cooling of the first monochromator crystal. 28 refs., 5 figs.

Date: January 1, 1991

Creator: Berman, L. E.; Hastings, J. B.; Oversluizen, T. & Woodle, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Vibration considerations in the design of the Advanced Photon Source at Argonne National Laboratory

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 result… more

Date: January 1, 1991

Creator: Jendrzejczyk, J.A. & Wambsganss, M.W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Operating experience with the ALS linac

The linac injector for the Advanced Light Source (ALS) at LBL was recently put into operation. Energy is 50 MeV, frequency 3 GHz. The electron gun delivers up to 6nC in a 3.0-ns bunch at 120 kV. A train of bunches is injected into a 1-Hz booster and accelerated to 1.5 GHz for storage ring injection. A magnetic analysis system is used for optimizing the linac. Measured beam properties from the gun and after acceleration in the linac are described. 9 refs., 3 figs.

Date: May 1, 1991

Creator: Selph, F. & Massoletti, D.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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X-ray, soft x-ray, and vuv beam position monitor

An x-ray beam position monitor has been developed and is currently operational at the NIST beamline X-24A of the National Synchrotron Light Source, Upton, NY. It was developed to accurately measure the vertical position of the synchrotron beam and to allow precise positioning of beamline optics. It is an area type monitor positioned 5.6 meters from the Tangent Point and precedes all beamline instrumentation. Vertical beam position is given by the differential photoemission current from two grid… more

Date: January 1, 1991

Creator: Karlin, B.A. (Brookhaven National Lab., Upton, NY (United States)); Cowan, P.L. (Argonne National Lab., IL (United States)) & Woicik, J.C. (National Inst. of Standards and Technology (IMSE), Gaithersburg, MD (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The Advanced Light Source U8 beam line, 20--300 eV

The U8 is a beam line under construction at the Advanced Light Source (ALS). The beam line will be described along with calculations of its performance and its current status. An 8 cm period undulator is followed by two spherical collecting mirrors, an entrance slit, spherical gratings having a 15{degree} deviation angle, a moveable exit slit, and refocusing and branching mirrors. Internal water cooling is provided to the metal M1 and M2 mirrors as well as to the gratings. Calculations have bee… more

Date: October 1, 1991

Creator: Heimann, P.; Warwick, T.; Howells, M.; McKinney, W.; Digennaro, D.; Gee, B. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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An overview of the ALS

This report giving a overview of the parameters, specifications, and scientific programs of the Advance Light Source. (LSP)

Date: February 1, 1991

Creator: Schlachter, A.S. & Robinson, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Wiggler, undulator, and free-electron laser-radiation sources development at the National Synchrotron Light Source

An overview is presented of the special radiation sources development at the NSLS for incorporation in a 2.5 GeV X-ray storage ring and a 700 MeV vuv storage ring. This includes a superconducting high field multipole wiggler, lambda/sub c/ = 0.5A; a permanent magnet wiggler, lambda/sub c/ = 2.0A; a maximum photon energy undulator (5 to 7 keV); an undulator for a soft X-ray line or continuum spectrum and a free electron laser source tunable in the 2500 to 4500A region. Source characteristics and… more

Date: January 1, 1982

Creator: Hsieh, H.; Krinsky, S.; Luccio, A.; Pellegrini, C. & van Steenbergen, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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National Synchrotron Light Source and special radiation-sources development

Design features are presented of the two high current electron storage rings comprising the National Synchrotron Light Source and its basic parameters are enumerated. In addition, an overview is presented of the special radiation sources under construction and development, including a superconducting wiggler, permanent magnet wiggler, x-ray and vuv undulators, free electron laser source and Compton backscattered ..gamma.. source.

Date: January 1, 1982

Creator: van Steenbergen, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Insertion device and beam line plans for the Advanced Photon Source: A report and recommendations by the Insertion Device and Beam Line Planning Committee

In the 7-GeV Advanced Photon Source (APS) Conceptual Design Report (CDR), fifteen complete experimental beam lines were specified in order to establish a representative technical and cost base for the components involved. In order to optimize the composition of the insertion devices and the beam line, these funds are considered a ''Trust Fund.'' The present report evaluates the optimization for the distribution of these funds so that the short- and long-term research programs will be most produ… more

Date: February 1, 1988

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Proposed uv-FEL user facility at BNL

The NSLS at Brookhaven National Laboratory is proposing the construction of a UV-FEL operating in the wavelength range from visible to 750{Angstrom}. Nano-Coulomb electron pulses will be generated at a laser photo-cathode RF gun at a repetition rate of 10 KHz. The 6 ps pulses will be accelerated to 250 MeV in a superconducting linac. The FEL output will serve four stations with independent wavelength tuning, using two wigglers and two rotating mirror beam switches. Seed radiation for the FEL am… more

Date: January 1, 1991

Creator: Ben-Zvi, Ilan; Di Mauro, L. F.; Krinsky, S.; White, M. G.; Yu, L. H.; Batchelor, K. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Conventional magnet storage rings for x-ray lithography

A first pass at the design of a conventional magnet storage ring for x-ray lithogrphy is presented. Electron beam size and power specifications are given, followed by a first pass at a lattice - a 4-fold symmetric, gradient FODO cell lattice using B = 1.6 Tesla C-magnets. (LEW)

Date: October 1, 1986

Creator: Bassetti, M.; Batchelor, K.; Galayda, J.; Halama, H.; Heese, R.; Hsieh, H. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Prototype photon position monitors for undulator beams at the Advanced Light Source

Design criteria are described, and test results are presented, for prototype ALS undulator beam position monitors. The design is based on monitors presently in use at NSLS, with modifications to account for the widely varying and large K values of the undulators to be installed at the ALS. In particular, we have modified the design to simplify the thermal engineering and we have explored techniques to suppress the response of the monitors to soft photons, so that the beam position can be determ… more

Date: October 17, 1990

Creator: Warwick, T.; Shu, D. (Lawrence Berkeley Lab., CA (United States)); Rodricks, B. (Argonne National Lab., IL (United States)) & Johnson, E.D. (Brookhaven National Lab., Upton, NY (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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National Synchrotron Light Source annual report 1991

This report discusses the following research conducted at NSLS: atomic and molecular science; energy dispersive diffraction; lithography, microscopy and tomography; nuclear physics; UV photoemission and surface science; x-ray absorption spectroscopy; x-ray scattering and crystallography; x-ray topography; workshop on surface structure; workshop on electronic and chemical phenomena at surfaces; workshop on imaging; UV FEL machine reviews; VUV machine operations; VUV beamline operations; VUV stor… more

Date: April 1, 1992

Creator: Hulbert, S.L. & Lazarz, N.M. (eds.)

Item Type: Report

Partner: UNT Libraries Government Documents Department

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An assessment of the effects of radiation on permanent magnet material in the ALS (Advanced Light Source) insertion devices

Electrons that are lost from the beam during normal operation of a synchrotron radiation source and during a beam dump at the end of a run produce both ionizing radiation and neutrons. This radiation has the potential for damaging sensitive materials, in particular those that need to be very close to the beam. The wigglers and undulators for the Advanced Light Source (ALS) at LBL will use magnetic materials such as the very high performance neodymium-iron-boron, which will be as close as 1 cm a… more

Date: August 1, 1989

Creator: Hassenzahl, W. V.; Jenkins, T. M.; Namito, Y.; Nelson, W. R. & Swanson, W. P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Magnetic data analysis for the ALS lattice magents

The Advanced Light Source (ALS), now under construction at Lawrence Berkeley Laboratory, is a third-generation synchrotron radiation source designed to produce extremely bright photon beams in the UV and soft X-ray regions. The lattice magnets to be installed in the two rings, a 1--1.9 GeV storage ring, and a 1.5 GeV booster synchrotron, have been magnetically measured to ascertain their excitation curves and field uniformity. In this paper the analysis of these data is discussed, and results f… more

Date: May 1, 1991

Creator: Keller, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Technological challenges of third generation synchrotron radiation sources

New third generation'' synchrotron radiation research facilities are now in construction in France, Italy, Japan, Taiwan and the USA. Designs for such facilities are being developed in several other countries. Third generation facilities are based on storage rings with low electron beam emittance and space for many undulator magnets to produce radiation with extremely high brightness and coherent power. Photon beam from these rings will greatly extend present research capabilities and open up n… more

Date: January 1, 1990

Creator: Cornacchia, M. & Winick, H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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The NSLS VUV undulator: Spectral characteristics and operating experience

The design and operating characteristics of the VUV undulator installed on the NSLS VUV ring are presented. Specifically, the spectral output through three circular on-axis pinholes of different diameters has been measured. Near the minimum magnetic gap (40mm), the flux into a 0.25 mrad circular aperture at the peak of the fundamental (h..nu.. = 57 eV) is approx.1 /times/ 10/sup 14/ photonssec0.1A1%BW. We find good agreement in spectral shape between these measured spectra and spectra calculate… more

Date: January 1, 1987

Creator: Johnson, P.D.; Galayda, J.; Hulbert, S.L.; Klaffky, R.W.; Luccio, A.; Vignola, G. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Tests of a model pole assembly for the ALS U5. 0 undulator

The ALS insertion devices must meet very tight requirements in terms of field quality and field strength. Even though the ability to calculate the performance of a hybrid insertion device has improved considerably over the past few years, a model pole was assembled to test the ALS U5.0 undulator geometry and to verify the calculations. The model pole consists of a half period of the periodic structure of the insertion device with mirror plates at the midplane and at the zero-field, half-period … more

Date: June 1, 1991

Creator: Hassenzahl, W.V.; Hoyer, E. (Lawrence Berkeley Lab., CA (United States)) & Savoy, R. (Argonne National Lab., IL (United States))

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Surveillance of 18 Hz and 60 Hz components of ground motion at the APS site

The objectives of this study are to determine the location and source of the 18- and 60-Hz vibration and to eliminate or reduce its amplitude in the APS Facility. To accomplish this it is necessary to know the time of occurrence and then, to utilize triangulation methods to identify the location of the source. It its time sequence is known, it may be possible to correlate it with the operation of some equipment at or near the site. Therefore, a major effort was made to obtain the time sequence … more

Date: March 1, 1990

Creator: Jendrzejczyk, J.A.; Wambsganss, M.W. & Smith, R.K.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Proposals for synchrotron light sources

Ever since it was first applied in the 1960's synchrotron radiation from an accelerating electron beam has been gaining popularity as a powerful tool for research and development in a wide variety of fields of science and technology. By now there are some 20 facilities operating either parasitically or dedicatedly for synchrotron radiation research in different parts of the world. In addition there are another 20 facilities either in construction or in various stages of proposal and design. The… more

Date: June 1, 1985

Creator: Teng, L.C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Positron injection linac system for the Argonne Light Source

The Argonne 6 GeV Light Source will use positrons rather than electrons in order to avoid ion trapping of the residual gas. One of the primary requirements of the linac system is the capability to deliver relatively intense short bunches of positrons in the stationary buckets of the booster synchrotron without utilizing a positron accumulator ring. A linac system for accomplishing this task is described. It consists of a 200-MeV, high-current, electron linac and a 450-MeV positron linear accele… more

Date: January 1, 1986

Creator: Mavrogenes, G.; Cho, Y. & Khoe, T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Fabrication and test of prototype ring magnets for the ALS (Advanced Light Source)

Prototype Models for the Advanced Light Source (ALS) Booster Dipole, Quadrupole and Sextupole and the Storage Ring Gradient Magnet, Quadrupole and Sextupole have been constructed. The Booster Magnet Prototypes have been tested. The Storage Ring Magnets are presently undergoing tests and magnetic measurements. This paper reviews the designs and parameters for these magnets, briefly describes features of the magnet designs which respond to the special constraints imposed by the requirements for b… more

Date: March 1, 1989

Creator: Tanabe, J.; Avery, R.; Caylor, R.; Green, M.I.; Hoyer, E.; Halbach, K. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Estimate of the coupling impedance for the storage rings of the NSLS

The most important ingredient to evaluate the stability of a particle beam in a storage ring is the longitudinal coupling impedance Z/n and the transverse impedance Z/sub perpendicular/ which is usually associated to the former. These impedances are calculated for the two storage rings which are part of the NSLS, namely the Ultra Violet Ring (UVR) and the X-Ray Ring (XRR)-the parameters for these two rings which are used throughout the paper are shown.

Date: August 1, 1979

Creator: Ruggiero, A. G.

Item Type: Report

Partner: UNT Libraries Government Documents Department