L. Tosi

Elettra Present and Future Upgrades

During the last year, the third generation synchrotron light source ELETTRA could fully benefit of several upgrades that have been implemented in the frame of a project to enhance the quality of the light source. The super conducting third harmonic cavity, the feedbacks, the realignment of the whole ring and other improved devices have allowed to further, significantly optimize the beam stability and lifetime, as well as the operability and uptime of the facility. At the same time two large-scale projects are underway that will change the perspectives of the whole ELETTRA laboratory, namely the full energy booster injector and the single pass X-ray FEL FERMI@Elettra, based on the existing linac. Their status will be presented here together with the overview of the existing light source.

Commissioning of two new insertion devices at ELETTRA

Two new insertion devices have recently been installed in the ELETTRA storage ring: a 3.5 Tesla superconducting multipole wiggler and a Figure-8 permanent magnet undulator. The first is the radiation source for a future X-ray diffraction beamline, while the second is designed to generate photons in the 5-11 eV range for inelastic UV scattering experiments. The impact of these devices on the electron beam dynamics was already studied at the design stage. In this paper initial commissioning results are presented and discussed, including the measured effects on the closed orbit and tune.

Longitudinal single-bunch instabilities for different operation energies at ELETTRA

The ELETTRA storage ring is currently operated over a wide electron-energy range (0.75-1.5 GeV and 2-2.4 GeV). This paper reports on measurements performed in order to characterize the longitudinal beam stability when the machine is operated in the low-energy range in single-bunch filling mode.

FERMI@ELETTRA: Project Update

Abstract The FERMI@ELETTRA project is an initiative from ELETTRA, INFM and other Italian institutes, to construct a single-pass FEL user-facility for the wavelength range from 100 nm (12 eV) to 1.2 nm (1 keV), to be located next to the third-generation synchrotron radiation facility ELETTRA in Trieste, Italy. The initial stage of the project is concentrated around the existing 1.2-GeV linac and aims for lasing and initial user experiments in the wavelength range from 100 nm to 10 nm. PACS codes: 41.60.Cr, 42.72.Bj, 07.85.Fv, 29.17. +w

Start-to-end simulations for the FERMI project @ ELETTRA

Abstract The FERMI @ ELETTRA project is aiming, in a first stage, for the construction of a single-pass FEL in the wavelength range from 100 nm to 40 nm. As a next step, the energy range of the existing accelerator system will be increased to reach the final wavelength target of 1.2 nm. Theoretical studies have been carried out in order to support the initial phase of the project. In particular, we report here on first integrated tracking simulation from the cathode through the undulators performed using different numerical codes. PACS codes: 41.60Ap, 41.60.Cr 41.85Ja, 52.59.Rz

Developments on the EUFELE project at ELETTRA

Abstract The European Free-Electron Laser at ELETTRA (EUFELE) is a project funded by the European Community aimed at the development and initial exploitation of a FEL radiation facility in the vacuum ultra-violet spectral region. We present here the status of the project and describe the most recent technical developments. PACS codes: 29.20 Dh; 41.60 Cr

Injection and FEL lasing with front end open at ELETTRA

In view of the construction of the new full-energy injector at ELETTRA, radiation dose measurements have been performed to study the scenario of beam losses in top-up regime and to explore potential conditions of radiation hazard for personnel. Measurements of gamma and neutron radiation fields have been carried out in the experimental hall varying the injection efficiency while a beamline front-end was open. In this context, FEL lasing experiments were performed while in injection mode. The collected data as well as future developments are presented and discussed.

FERMI@ELETTRA: the single-pass free-electron laser for the VUV and soft x-ray spectral range at ELETTRA

The FERMI proposal is an initiative from ELETTRA, INFM and other Italian institutes, to construct a single-pass FEL user-facility, to be located next to the third-generation synchrotron radiation facility ELETTRA in Trieste, Italy. For the initial phase, the project aims for lasing from 100 nm to 10 nm, with the use of the existing 1.2-GeV S-band linac. As a next step, the accelerator system should be extended to reach 1.2 nm. In all stages, reliability and flexibility are of importance. That is, seeding schemes are considered to improve the SASE output. In addition, users of this new source will have full control over both wavelength and polarization of the radiation. The initiative is a response to the Italian governments call for proposals for a multi-purpose pulsed laser X-ray source. In anticipation of a positive decision, the Sincrotrone Trieste has initiated the ELETTRA Linac FEL project (ELF), i.e., an R&D project to facilitate a quick and effective implementation of the first step of FERMI. Here, we describe the main features of the project. Emphasis is given to the implementation and initial steps and the ELF project.