Piotr Goryl

Effective Cycling and Ramping

The National Synchrotron Radiation Centre Solaris, Krakow, Poland has been successfully built in collaboration with several institutes and organizations. The MAX IV Laboratory, Lund, Sweden and ElettraSincrotrone, Trieste, Italy, are the most important synchrotron partners. Solaris has built, as an adaptation of MAX IV, 1.5 GeV storage ring and linear accelerator based on the same components, therefore the device server for the magnet circuit has been developed by MAX IV. Ramping was included in expert consultancy services contract won by Elettra-Sincrotrone. Solving problem with the power supplies stability and thanks to snapshots usage as steps for the ramping it was possible to ramp the beam without losing current linearly.

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.