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in creator/contributor: "Luccio, A."

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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

open access

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

open access

Optical characteristics of super-radiant harmonic radiation from a FEL and optical klystron. 3D model

In free-electron sources of coherent light, bunching of the electrons allows the super-radiant production of coherent harmonic radiation, up to substantially high harmonic numbers. This paper presents a fully three dimensional model formulation for evaluating coherent harmonic radiation from a free-electron laser or optical klystron. The radiated electromagnetic field is expanded in terms of a set of orthonogonal free-space modes. Expansion coefficients can be evaluated once a generalized form … more

Date: January 1, 1986

Creator: Gover, A.; Luccio, A.; Friedman, A. & Fauchet, A.M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

User control of the proton beam injection trajectories into the AGS Booster

The 1.5 GeV (proton) Booster Synchrotron nearing completion at the AGS will get its 200 MeV beam from the linac, via a 34.9 m long linac-to-Booster transport line, LTB. LTB branches off from the existing linac-to-AGS transport line, HEBT, approximately 18.4 m downstream from the linac. A schematic layout of LTB is shown in the bottom part of Fig. 1. The four dipoles, DH2 through DH5, which are identical and are operated in series, provide a 126{degrees} bend in the line. We have employed three … more

Date: January 1, 1991

Creator: D'Ottavio, T.; Kponou, A.; Luccio, A.; Alessi, J.G.; Reece, R.K. & Skelly, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Coherent backscattering in the soft x-ray region

It is shown that coherent polarized soft x-rays can be produced by a combination of two techniques - stimulated amplification of laser light in a magnetic undulator, and Compton scattering of laser photons on an electron beam. In the combined technique, laser radiation is Compton scattered from a relativistic electron beam, whose current or charge density is periodically modulated. An electron beam and a laser beam propagate through an undulator along the same line. Inside the undulator, the la… more

Date: June 1, 1986

Creator: Matone, G. & Luccio, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Study for a 6 GeV undulator based synchrotron radiation source

A partial study for a 6 GeV undulator based synchrotron radiation source for production of high brightness undulator radiation, in the A region, is presented. The basic lattice adopted for the storage ring is a hybrid FODO Chasman-Green lattice, making use of gradient in the dipoles. We discuss also the e beam current limits and the injection parameters.

Date: January 1, 1985

Creator: Vignola, G.; Barton, M.; Blumberg, R.; Galayda, J.; Krinsky, S.; Luccio, A. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Possible Depolarization Mechanism due to Low Beta Squeeze

Simulations reveal a potential depolarization mechanism during low beta squeeze. This depolarization appears to be driven by a spin tune modulation caused by spin precession through the strong low beta quads due to the vertical fields. The modulation of the spin tune introduces an additional snake resonance condition at {nu}{sub s0} {+-} n{nu}{sub x} - {nu}{sub z}l = integer which while the same numerology as the well known sextupole resonance, can operate in the absence of sextupole elements.

Date: April 1, 2008

Creator: Ranjbar,V.; Luccio, A. & Bai, M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Spin Rotation of Formalism for Spin Tracking

The problem of which coefficients are adequate to correctly represent the spin rotation in vector spin tracking for polarized proton and deuteron beams in synchrotrons is here re-examined in the light of recent discussions. The main aim of this note is to show where some previous erroneous results originated and how to code spin rotation in a tracking code. Some analysis of a recent experiment is presented that confirm the correctness of the assumptions.

Date: February 1, 2008

Creator: Luccio, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Spin Resonances for Stored Deuteron Beams in COSY. Vector Polarization. Tracking with Spink

Results of measurements of vector and tensor polarization of a deuteron beam in the storage ring COSY have been published by the SPIN{at}COSY collaboration. In this experiment a RF Dipole was used that produced spin flip. The strength of the RFD-induced depolarizing resonance was calculated from the amount of spin flipping and the results shown in the figures of the cited paper. In this note we present the simulation of the experimental data (vector polarization) with the spin tracking code Spi… more

Date: April 1, 2008

Creator: Luccio, A. & Lehrach, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

First results of proton injection commissioning of the AGS Booster synchrotron

Beam performance for the injection phase of proton beam commissioning of the AGS Booster synchrotron will be presented. The beam from the 200 MeV Linac is transported through a new beam line into the Booster. This Linac-to Booster (LTB) beam line includes a 126{degree} bend and brings the injected beam onto the Booster injection orbit through the backleg of a main ring dipole magnet. Transfer of beam from the Linac to the Booster, spiralling beam and closing the orbit in the Booster ring are di… more

Date: January 1, 1991

Creator: Reece, R. K.; Ahrens, L.; Alessi, J.; Bleser, E.; Brennan, J. M.; Luccio, A. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Generalized emittance measurements in a beam transport line

Motivated by the need to commission 3 beam transport lines for the new AGS Booster project, we have developed a generalized emittance-measurement program; beam line specifics are entirely resident in data tables, not in program code. For instrumentation, the program requires one or more multi-wire profile monitors; one or multiple profiles are acquired from each monitor, corresponding to one or multiple tunes of the transport line. Emittances and Twiss parameters are calculated using generalize… more

Date: January 1, 1991

Creator: Skelly, J.; Gardner, C.; Luccio, A.; Kponou, A. & Reece, K.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Studies on the undulator for the free electron laser experiment at the National Synchrotron Light Source

Undulator magnets are used in connection with particle (typically electron) storage rings to enhance the spectrum of synchrotron radiation and are a basic component of free electron lasers. Two configurations are common: helical undulators, for which the magnetic field on the axis is constant in modulus and rotates around the axis as we proceed along it; and transverse undulators, that have a median plane of symmetry. The orientation of the field for a transverse geometry is always the same on … more

Date: January 1, 1981

Creator: Luccio, A. & Krinsky, S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Lectures on accelerator physics

This report contains lecture notes on beam dynamics and acceleration concepts in particle accelerators. (LSP)

Date: March 11, 1991

Creator: Luccio, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Radiation from moving charged particles with spin

The theory of radiation emitted by a charged particle with spin in relativistic motion in an external magnetic field is reviewed. Approximate expressions suitable numerical computation, in far and near field, are derived. In particular, the case of the passage of a particle accelerator beam through an undulator is considered. It is shown that observation of the spectrum of the emitted radiation, in its two states of polarization, can be used not only for beam diagnostics, but also to measure th… more

Date: October 5, 1992

Creator: Luccio, A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Three dimensional calculation of electron energy loss in a variable parameter free-electron laser

The motion of an electron beam through a longitudinally varying period undulator for a single-pass free-electron laser is studied. It is shown that, under certain conditions, the electrons are trapped in an optical bucket, and deliver on the average more energy to the laser field than in constant period undulators of comparable parameters. The limits set by a finite beam emittance and energy spread are studied in detail by three-dimensional computer simulation.

Date: January 1, 1980

Creator: Luccio, A. & Pellegrini, C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Wiggler as spin rotators for RHIC

The spin of a polarized particle in a circular accelerator can be rotated with an arrangement of dipoles with field mutually perpendicular and perpendicular to the orbit. To achieve spin rotation, a given field integral value is required. The device must be designed in a way that the particle orbit is distorted as little as possible. It is shown that wigglers with many periods are suitable to achieve spin rotation with minimum orbit distortions. Wigglers are also more compact than more establis… more

Date: January 1, 1993

Creator: Luccio, A. & Conte, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Measurement of the spin of a particle using undulator radiation

Use of many period wigglers to rotate the spin of particles in accelerators has been proposed. An added advantage of this scheme is that a spectrum of synchrotron radiation will be produced that contains a contribution due to the spin, so that the device can be effectively used as spin polarimeter, with advantages compared to Compton backscattering methods. Results are presented for two high energy proton storage rings: RHIC and the SSC.

Date: January 1, 1993

Creator: Luccio, A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Free electron laser experiment at Brookhaven

The status of the free electron laser experiment at Brookhaven is reported. We describe the permanent magnet undulator already built and ready to be installed on the VUV storage ring. We also describe the gain measurement experiment now being prepared.

Date: January 1, 1982

Creator: Luccio, A.; Pellegrini, C.; van Steenbergen, A. & Yue, L.H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Beam - and drive - controlled amplifier for the ISABELLE accelerating system

The need of very low output impedance rf systems for heavy particle accelerators has led to the development of very sophisticated amplifier configurations. Among them, the use of a common-anode final amplifier seems most promising. If the output impedance is defined in the Thevenin Theorem sense, then class-A operation seems unavoidable. However, for particle dynamics only the voltage induced by the beam is of real concern and voltage requirements do not necessarily demand a time invariant outp… more

Date: January 1, 1981

Creator: Luccio, A. & Puglisi, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Ring diagnostics and consistency test of the model for the AGS Booster

From a systematic analysis of readings of the beam position monitors in the AGS Booster ring, combined with the transfer matrices between a few locations in the ring, calculated with MAD, the consistency of the model of the lattice has been tested. This technique has enabled us to (1) detect errors in the machine that subsequent survey during shutdown has confirmed, and (2) to measure the actual circulating beam momentum offset The method has proved rather general and convenient for accelerator… more

Date: June 1, 1993

Creator: Luccio, A. & Auerbach, E. H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Wiggler as spin rotators for RHIC

Date: June 1, 1993

Creator: Luccio, A. & Conte, M.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Commissioning Spin Rotators in RHIC.

During the summer of 2002, eight superconducting helical spin rotators were installed into RHIC in order to control the polarization directions independently at the STAR and PHENIX experiments. Without the rotators, the orientation of polarization at the interaction points would only be vertical. With four rotators around each of the two experiments, we can rotate either or both beams from vertical into the horizontal plane through the interaction region and then back to vertical on the other s… more

Date: May 12, 2003

Creator: MacKay, W. W.; Bai, M.; Courant, E. D.; Fischer, W.; Huang, H.; Luccio, A. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Matching the Cold AGS Snake to the AGS Lattice

N/A

Date: September 1, 2004

Creator: Luccio, A. & Roser, T.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Spin tracking simulations in AGS based on ray-tracing methods - bare lattice, no snakes -

This Note reports on the first simulations of and spin dynamics in the AGS using the ray-tracing code Zgoubi. It includes lattice analysis, comparisons with MAD, DA tracking, numerical calculation of depolarizing resonance strengths and comparisons with analytical models, etc. It also includes details on the setting-up of Zgoubi input data files and on the various numerical methods of concern in and available from Zgoubi. Simulations of crossing and neighboring of spin resonances in AGS ring, b… more

Date: September 1, 2009

Creator: Meot, F.; Ahrens, L.; Glenn, J.; Huang, H.; Luccio, A.; MacKay W. W. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department