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in creator/contributor: "Winick, H."

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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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Study of collective effects in a low-emittance PEP lattice

This paper summarizes the work on the collective effects studied during the previously described low-emittance operation of PEP. These studies looked at the single bunch and multi-bunch current limits consistent with stable beam operation. The lower than expected current limits and observed coherent beam oscillations, together with methods of countering them, were considered at a recent SSRL workshop. A result of these studies has been that the lower momentum compaction factor and large beta fu… more

Date: January 1, 1989

Creator: Kramer, S. L.; Borland, M.; Galayda, J.; Jackson, A.; Winick, H.; Zisman, M. S. (Argonne National Lab., IL (USA) et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Initial operation of SSRL wiggler in spear

A 3 lambda planar, magnetic wiggler has been designed, built, installed and operated in the SPEAR storage ring. Its primary purpose is to provide tunable synchrotron radiation (SR) with a higher energy and intensity than previously available for a new SR beam line just commissioned at the Stanford Synchrotron Radiation Laboratory. Because the magnet operates from 0-18 kG, it should also produce undulator radiation (UR). Since the wiggler influences storage ring operation in both single beam and… more

Date: March 1, 1979

Creator: Berndt, M.; Brunk, W.; Cronin, R.; Jensen, D.; Johnson, R.; King, A. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Undulator induced resonances

Undulators appear to be nearly ideal radiation sources for use in storage rings because of their high brightness and small perturbation on stored beam characteristics. We consider the effects of higher-order magnetic field errors and show how they increase beam size and may lead to unstable growth of betatron oscillations. We have observed such effects in SPEAR at betatron tunes satisfying the equations: 3nu/sub x/ + nu/sub y/ = 21 and nu/sub x/ + 3nu/sub y/ = 21. The widths of these resonances… more

Date: August 1, 1983

Creator: Harris, J.; Morton, P.; Spencer, J. & Winick, H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Beam Line VI REC-steel hybrid wiggler for SSRL

A wiggler magnet with 27 periods, each 7 cm long which reaches 1.21 T at a 1.2 cm gap and 1.64 T at 0.8 cm gap has been designed and is in fabrication. Installation in SPEAR is scheduled for mid 1983. This new wiggler will be the radiation source for a new high intensity synchrotron radiation beam line at SSRL. The magnet utilizes rare-earth cobalt (REC) material and steel in a hybrid configuration to achieve simultaneously a high magnetic field with a short period. The magnet is external to a … more

Date: March 1, 1983

Creator: Hoyer, E.; Chan, T.; Chin, J. W. G.; Halbach, K.; Kim, K. J.; Winick, H. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Workshop on scientific applications of short wavelength coherent light sources

This report contains paper on the following topics: A 2 to 4nm High Power FEL On the SLAC Linac; Atomic Physics with an X-ray Laser; High Resolution, Three Dimensional Soft X-ray Imaging; The Role of X-ray Induced Damage in Biological Micro-imaging; Prospects for X-ray Microscopy in Biology; Femtosecond Optical Pulses ; Research in Chemical Physics Surface Science, and Materials Science, with a Linear Accelerator Coherent Light Source; Application of 10 GeV Electron Driven X-ray Laser in Gamma-… more

Date: February 1, 1993

Creator: Spicer, W.; Arthur, J. & Winick, H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Permanent magnet undulator for SPEAR

A 30 period permanent magnet (SmCo/sub 5/) undulator has been designed, built and tested. The period is 6.1 cm, overall length is 1.95 m, and the gap is variable from 2.7 cm to 6.0 cm. Magnetic measurements at the midplane with a 2.7 cm gap show that the field is sinusoidal with a peak value of .28 T. Construction details and magnetic measurements are presented along with the spectral distribution of radiation produced by 3.0 GeV electrons traversing the undulator.

Date: March 1, 1981

Creator: Halbach, K.; Chin, J.; Hoyer, E.; Winick, H.; Cronin, R.; Yang, J. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

40-{angstrom} FEL designs for the PEP storage ring

We explore the use of the 2.2-km PEP storage ring at SLAC to drive a 40-{Angstrom} free-electron laser in the self-amplified spontaneous emission configuration. Various combinations for electron-beam and undulator parameters, as well as special undulator designs, are discussed. Saturation and high peak, in-band, coherent power (460 MW) are possible with a 67-m, hybrid permanent-magnet undulator in a ring bypass. A 100-m, cusp-field undulator can achieve high average, in-band, coherent power (0.… more

Date: December 31, 1991

Creator: Fisher, A. S.; Gallardo, J. C.; Nuhn, H. D.; Tatchyn, R.; Winick, H. & Pellegrini, C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Short wavelength FELs using the SLAC linac

Recent technological developments have opened the possibility to construct a device which we call a Linac Coherent Light Source (LCLS); a fourth generation light source, with brightness, coherence, and peak power far exceeding other sources. Operating on the principle of the free electron laser (FEL), the LCLS would extend the range of FEL operation to much aborter wavelength than the 240 mn that has so far been reached. We report the results of studies of the use of the SLAC linac to drive an … more

Date: August 1, 1993

Creator: Winick, H.; Bane, K. & Boyce, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Linac Coherent Light Source (LCLS) at 2--4 nm using the SLAC linac

The authors describe the possible use of the SLAC linac to drive a unique, powerful, short wavelength Linac Coherent Light Source (LCLS). Using the FEL principle, lasing is achieved in a single pass of a high peak current electron beam through a long undulator by self-amplified-spontaneous-emission (SASE). The main components are a high-brightness electron RF gun with a photocathode, two electron bunch length compressors, the existing SLAC linac, beam diagnostics, and a long undulator combined … more

Date: August 1, 1993

Creator: Seeman, J. T.; Bane, K.; Boyce, R.; Loew, G.; Morton, P.; Nuhn, H. D. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Workshop on scientific applications of short wavelength coherent light sources

This report contains paper on the following topics: A 2 to 4nm High Power FEL On the SLAC Linac; Atomic Physics with an X-ray Laser; High Resolution, Three Dimensional Soft X-ray Imaging; The Role of X-ray Induced Damage in Biological Micro-imaging; Prospects for X-ray Microscopy in Biology; Femtosecond Optical Pulses?; Research in Chemical Physics Surface Science, and Materials Science, with a Linear Accelerator Coherent Light Source; Application of 10 GeV Electron Driven X-ray Laser in Gamma-… more

Date: February 1, 1993

Creator: Spicer, W.; Arthur, J. & Winick, H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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High energy synchrotron radiation sources

In the world there are now about 43 laboratories in 16 counties engaged in the operation, construction or planning of electron storage rings, from a few hundred MeV to above 10 GeV, as sources of synchrotron radiation for basic and applied research. In this report we describe the new 3rd generation high energy (i.e.; hard X-ray) sources. The first of these, the 6 GeV European Synchrotron Radiation Facility (ESRF) in Grenoble, France started operation in mid 1992. The 7 GeV Advanced Photon Sourc… more

Date: July 1, 1993

Creator: Winick, H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Emittance Studies of the BNL/SLAC/UCLA 1.6 Cell Photocathode RF Gun

The symmetrized 1.6 cell S-band photocathode gun developed by the BNL/SLAC/UCLA collaboration is in operation at the Brookhaven Accelerator Test Facility (ATF). A novel emittance compensation solenoid magnet has also been designed, built and is in operation at the ATF. These two subsystems form an emittance compensated photoinjector used for beam dynamics, advanced acceleration and free electron laser experiments at the ATF. The highest acceleration field achieved on the copper cathode is 150 M… more

Date: September 9, 2011

Creator: Palmer, D. T.; Wang, X. J.; Miller, R. H.; Babzien, M.; Ben-Zvi, Ilan; Pellegrini, C. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Study of Collective Effects for the PEP Low-Emittance Optics

Experimental studies have been performed on the PEP storage ring run at 7.1 GeV in the low-emittance mode. The motivation for this work is to explore the capability of PEP as a dedicated synchrotron radiation source. The long straight sections and low emittance available at PEP make its use for this purpose very attractive, and would produce a source of very high brightness x-ray beams for the scientific community. During the studies, single-bunch current limitations were measured as a function… more

Date: July 1, 1988

Creator: Zisman, M. S.; Borland, M.; Galayda, J.; Jackson, A.; Kramer, S. & Winick, H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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A 2 to 4 nm high power FEL on the SLAC linac

We report the results of preliminary studies of a 2 to 4 nm SASE FEL, using a photoinjector to produce the electron beam, and the SLAC linac to accelerate it to an energy up to 10 GeV. Longitudinal bunch compression is used to increases ten fold the peak current to 2.5 kA, while reducing the bunch length to the subpicosecond range. The saturated output power is in the multi-gigawatt range, producing about 10{sup 14} coherent photons within a bandwidth of about 0.2% rms, in a pulse of several mi… more

Date: September 1, 1992

Creator: Pellegrini, C.; Rosenzweig, J.; Nuhn, H. D.; Pianetta, P.; Tatchyn, R.; Winick, H. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Towards short wavelengths FELs workshop

This workshop was caged because of the growing perception in the FEL source community that recent advances have made it possible to extend FEL operation to wavelengths about two orders of magnitude shorter than the 240 nm that has been achieved to date. In addition short wavelength FELs offer the possibilities of extremely high peak power (several gigawatts) and very short pulses (of the order of 100 fs). Several groups in the USA are developing plans for such short wavelength FEL facilities. H… more

Date: December 1, 1993

Creator: Ben-Zvi, Ilan & Winick, H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Design considerations for a 60 meter permanent magnet undulator for the SLAC Linac Coherent Light Source (LCLS)

In this paper we describe design, fabrication, and measurement aspects of a pure permanent magnet (PM) insertion device designed to operate as an FEL at a 1st harmonic energy of 300 eV and an electron energy of 7 GeV in the Self-Amplified Spontaneous Emission (SASE) regime.

Date: April 1, 1993

Creator: Tatchyn, R.; Boyce, R.; Halbach, K.; Nuhn, H. D.; Seeman, J.; Winick, H. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

A 2--4 nm Linac Coherent Light Source (LCLS) using the SLAC linac

We describe the use of the SLAC linac to drive a unique, powerful. short wavelength Linac Coherent Light Source (LCLS). Operating as an FEL, lasing would be achieved in a single pass of a high peak current electron beam through a long undulator by self-amplified spontaneous emission (SASE). The main components are a high-brightness rf photocathode electron gun; pulse compressors; about 1/5 of the SLAC linac; and a long undulator with a FODO quadrupole focussing system. Using electrons below 8 G… more

Date: May 1, 1993

Creator: Winick, H.; Bane, K. & Boyce, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Microwave measurements of the BNL/SLAC/UCLA 1.6 cell photocathode rf gun

The longitudinal accelerating field E. has been measured as a function of azimuthal angle in the full cell of the cold test model for the 1.6 cell BNL/SLAC/UCLA {number_sign}3 S-band RF Gun using a needle rotation/frequency perturbation technique. These measurements were conducted before and after symmetrizing the full cell with a vacuum pump out port and an adjustable short. Two different waveguide to full cell coupling schemes were studied. The dipole mode of the full cell is an order of magn… more

Date: June 1995

Creator: Palmer, D. T.; Miller, R. H.; Winick, H.; Wang, X. J.; Batchelor, K.; Woodle, M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Commissioning results of the next generation photoinjector

The Next Generation Photoinjector (NGP) developed by the BNL SLAC / UCLA collaboration was installed at the Brookhaven National Laboratories Accelerator Test Facility (ATF). The commissioning results and performance of the photocathode injector are present. The Next Generation Photoinjector consists of the symmetrized BNL/SLAC/UCLA 1.6 cell S-band Photocathode RF gun and a single solenoidal magnet for transverse emittance compensation. The highest acceleration field achieved on the cathode is 1… more

Date: December 1, 1996

Creator: Palmer, D. T.; Miller, R. H.; Pellegrini, C.; Winick, H.; Wang, X. J.; Babzien, M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Simulations of the BNL/SLAC/UCLA 1.6 cell emittance compensated photocathode RF gun low energy beam line

A dedicated low energy (2 to 10 MeV) experimental beam line is now under construction at Brookhaven National Laboratories Accelerator Test Facility (BNL/ATF) for photocathode RF gun testing and photoemission experiments. The design of the experimental line, using the 1.6 cell photocathode RF gun developed by the BNL/SLAC/UCLA RF gun collaboration is presented. Detailed beam dynamics simulations were performed for the 1.6 cell RF gun injector using a solenoidal emittance compensation technique. … more

Date: June 1995

Creator: Palmer, D. T.; Miller, R. H.; Winick, H.; Wang, X. J.; Batchelor, K.; Woodle, M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fourth generation light sources

Concepts and designs are now being developed at laboratories around the world for light sources with performance levels that exceed present sources, including the very powerful and successful third generation synchrotron radiation sources that have come on line in the past few years. Workshops, have been held to review directions for future sources. A main thrust is to increase the brightness and coherence of the radiation using storage rings with lower electron-beam emittance or free-electron … more

Date: May 1, 1997

Creator: Winick, H.

Item Type: Article

Partner: UNT Libraries Government Documents Department