Carlo Bocchetta

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.

Status of the Solaris Control System - Collaborations and Technology

The Solaris is a synchrotron light source starting just now in Krakow, Poland. It is built with strong collaboration with other European accelerator facilities. The MAX-IV project in Lund, Sweden and Tango Community are the most important partners in the project in respect to the control system. Solaris has built a twin copy of MAX-IV 1.5GeV ring and linear accelerator based on the same components as the ones of MAX-IV. Thus, both facilities share know-how and apply similar technologies for the control system, among them the Tango CS is used for software layer. Status of the control system in Krakow as well as collaborations and technological choices impact on its success are presented in this paper. THE ACCELERATOR AND BEAMLINES The Solaris machine is 1.5GeV storage ring the same as one of the MAX-IV supplied with a linear accelerator providing electron beam up to 600MeV. Since the linac is not providing full energy beam there is need of energy ramping in the storage ring. This is a difference to MAXIV setup. The Solaris project includes also two beamlines. One is using bending magnet radiation with XAS and PEEM end-stations and the other is basing on undulator source with an UARPES end-station [1]. The accelerators and beamlines are installed except few components of PEEM beamline and two Landau cavities in the storage ring. There is on-going commissioning of the accelerator [2]. The latest result is accumulation of 20mA current in the storage ring which then has been ramped to full energy of 1.5GeV. Currently certain optimization has been done that let us by the day of writing this paper (17.10.2015) accumulate the current of 48mA. The work is in progress to do energy ramping of this much od current. For now limitation are instabilities due to the ion trapping process. There is planned upgrade shutdown starting end of November 2015 till beginning of January 2016. During this period the landau cavities will be installed as well as missing components of the PEEM beamline. Network infrastructure will be supplemented with a new core switch to enable 10GBps connections through the whole network. It is also planned to do upgrade of the Tango control system to the newest version of Tango 9.1. After the shutdown commissioning of the beamlines will proceed. It is expected that the Solaris will be ready for the first external users in second half of 2016.

Facility Updates: Fermi @ Elettra: A Free Electron Laser for EUV and Soft X-ray Radiation

Sincrotrone Trieste has received funding and has begun the final refinement of technical parameters as well as the construction of a new Free Electron Laser (FEL) called Fermi. The new light source will be located adjacent to the existing Elettra storage ring and will use the linac that presently injects electrons into this light source. The linac will shortly become fully available to the Fermi project as a new dedicated full energy injection system is also being built for Elettra. Why are VUV and X-ray FELs so important and how do they work? Most readers will know that in a bending magnet, synchrotron radiation is created by the incoherent emission of each electron as it moves in a magnetic field.

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

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.