20th ESLS-RF Workshop

16 Nov 2016, 08:30 → 17 Nov 2016, 17:25 Europe/Zurich

University of Applied Sciences, Brugg/Windisch and Paul Scherrer Institut, Villigen

We are pleased to announce the yearly meeting of the RF experts of the European Synchrotron Light Sources, the 2016 ESLS-RF Workshop.
The meeting is intended to share operation experiences, discuss the status and new developments of existing light sources in Europe as well as to report on the progress of new light sources under construction.
The 20th such workshop, organized by the Paul Scherrer Institute, will be held at the new campus of the University of Applied Sciences in Brugg/Windisch, near PSI, and at the SLS in Villigen PSI on the 16th and 17th November 2016.
There is no registration cost but participation is subject to invitation.

Wednesday, 16 November

Registration

Convener: Marlen Bugmann (Paul Scherrer Institut)

Welcome to the 20th ESLS-RF Workshop

Convener: Lukas Stingelin (Paul Scherrer Institut)

slides 2016_ESLS_RFws_Welcome.pdf

Session 1: Contributions from BESSY & bERLinPro and DELTA

Convener: Dr Cristina Pasotti (ELETTRA)

1 Status of BESSY and bERLinPro

The status of RF at BESSY II will be reported. First year of operation of the solid state transmitters, problems with the 3rd harmonic (Landau) cavities and vacuum problems in the cavity section. The building of bERLinPro will be finished end of his year. There will be a brief report on the status of components and problems with the 270 kW 1.3 GHz klystron.

Speaker: Dr Wolfgang Anders (Helmholtz-Zentrum Berlin)

Slides Anders_Status_of_RF_at_HZB_and_BP_2016.pptx

2 RF Upgrade Plans at DELTA

The 1.5 GeV storage ring Delta is currently equipped with a 40 kW klystron amplifier providing power to a single DORIS-type cavity. With the advent of a new wiggler in 2018 also the RF system will be upgraded. An overview of the upgrade and its current status is given.

Speaker: Dr Peter Hartmann (DELTA, TU-Dortmund)

Slides ESLS-RF16-DELTA.odp ESLS-RF16-DELTA.pdf

10:15 Coffee Break

Session 2: Contributions from SOLEIL

Convener: Dr Wolfgang Anders (Helmholtz Institut Berlin)

3 Ten years of operation with the SOLEIL RF systems (experience, upgrades, R&D’s) and contributions to other projects

We report here about the ten-year operational experience with the SOLEIL 352 MHz RF systems, their main upgrades, related developments and contributions to other projects.

Speaker: Dr Patrick Marchand (Synchrotron SOLEIL)

4 Operational experience with the SOLEIL LINAC and status of the ThomX LINAC project

Operational experience with the SOLEIL LINAC Status of the ThomX LINAC project

Speaker: Mr Jean-Pierre POLLINA (Synchrotron SOLEIL)

Slides Operational_experience_with_the_SOLEIL_LINAC-thomx.pptx

5 State of the art RF solid state power amplifiers

We report here about SOLEIL experience with the 352 MHz solid state power amplifiers (SSPA’s) and its associated developments carried out in this domain. This technology, which has now reached maturity, is being adopted by many other facilities for applications ranging from 80 MHz up to 1.5 GHz. We make a (non-exhaustive) review of them.

Speaker: Mr Massamba DIOP (Synchrotron SOLEIL)

Slides diop_ESLSRF2016.pptx

12:30 Lunch

Session 3: Contributions from DLS, Solaris and ALBA

Convener: Dr Jörn Jacob (ESRF)

6 Status of RF at Diamond Light Source and overview of upgrade plans

Diamond Light Source has been operating for users since 2007 and presently operates with two CESR-B cavities supporting 300mA storage ring operation. RF reliability has been good in 2016 with RF MTBF approaching 200 hours for the year to date. Details are presented of the recovery from cavity failures in 2014 and 2015, particularly the repairs of the failed cryostat modules, including the first in-house cavity repair in an on-site cleanroom. Reliability and performance upgrades carried out in the last 12 months are presented and plans are given for the future introduction of two normal conducting cavities into the storage ring to support the operation of the two superconducting cavities.

Speaker: Dr Chris Christou (Diamond Light Source)

Slides DLS_ESLSRF_2016_PSI.pptx

7 Status of Solaris

Solaris is a 3rd generation light source facility being built in Krakow, Poland at the Jagiellonian University Campus. The project is being accomplished in a tight collaboration with the MAX IV Laboratory in Lund, Sweden. After commissioning phase, last year was used mostly for storage ring beam optimisation nevertheless some works in the RF system have been done. The linac parameters have been fixed for stable, reproducible injection to storage ring. The 3rd order harmonic cavities with detuning plunger have been installed in storage ring and their commissioning have been started. Although the equipment is new some problems already appeared. This presentation will give a view on the recent status of RF in Solaris.

Speaker: Mr Pawel Borowiec (National Synchrotron Radiation Centre Solaris, Jagiellonian University)

Slides Borowiec_Status_of_Solaris_XX_ESLS_RF.pptx

8 Status and new developments of RF Systems of ALBA

ALBA is a 3Gev 3rd generation synchrotron light source located in Barcelona and operating with users since May 2012. The RF system of the SR is composed of 12 IOTs, providing up to 80kW each. The power of every pair of IOTs is combined in a cavity combiner (CaCO) and transferred to each cavity (6 in overall) through a waveguide system. In this presentation we will cover RF operation statistics of last year, main operation problems and improvements of RF reliability. We will also show the last developments/upgrades of the ALBA RF Systems which includes: - Amplfiers: New 500MHz SSA amplifier for Booster - 3rd Harmonic System: Normal conducting, active third harmonic cavity with HOM dampers and SSA amplifier at 1.5GHz - RF lab operation: Cyclotron Cavity Conditioning - LLRF: Phase modulation for RF Trip compensation

Speaker: Ms Angela Salom (CELLS)

Slides Status_and_New_Developments_of_RF_Systems_of_ALBA.ppt

15:00 Coffee Break

Session 4: Contributions from ESRF, ELI and ESS

Convener: Dr Paolo Craievich (PSI)

9 Status of RF operation and RF upgrade for the future Extremely Brilliant Source at the ESRF

Speaker: Dr Jörn Jacob (ESRF)

Slides Jacob-ESLSRF-PSI-2016.pptx

10 Coaxial tunnel roof feed through and its cooling

Speaker: Mr Michel Langlois (ESRF)

Slides LANGLOIS_ESLS_RF.pptx

11 The ELI-NP Gamma Beam System: A New Facility for Nuclear Physics Research – Current Status

The Gamma Beam System – the future user facility – is being built in the framework of the Extreme Light Infrastructure–Nuclear Physics (ELI-NP) project in Bucharest/Magurele, Romania. This is an advanced source of gamma rays based on Compton back-scattering. By collision of a visible laser beam and a high brightness relativistic electron beam, an intense (~1011 γ/s), brilliant γ beam (<0.5% bandwidth) with Eγ up to 19.5 MeV will be obtained. A warm RF linac operated at the C-band mode with S-band photo-injector will deliver electron beams of energy up to about 720 MeV. The photo-injector laser system will produce a sequence of trains made of 32 laser pulses at 100Hz repetition rate with a ~10ps pulse duration in the UV range. For the Interaction Points (IP) other lasers will produce pulses with energy of 0.2J, at 515nm and 3.5ps duration at a repetition rate of 100 Hz. The collision of the interaction laser pulses with the 32 electron micro-bunches every 10 ms will be ensured by an optical cavity – multi-pass re-circulator – that will recirculate 32 times each IP laser pulse. Appropriate collimators to filter out the energy spectrum and a γ-beam characterization system will be used. The Gamma Beam System will be a state-of-the-art machine, capable to produce gamma beams with extremely advanced features. It will pursue advanced applications in the field of national security, nuclear waste treatment, nuclear medicine, as well as fundamental studies in nuclear physics. Currently building construction as well as acceptance procedures of the linac system components corresponding to the gamma beam energy of minimum 1 MeV are completed (Project Stage I), and installation of accelerator is being started. The current status of the building and the RF linac for the Gamma Beam System will be presented.

Speaker: Dr Piotr Tracz (ELI-NP/IFIN-HH)

Slides 20th-ESLS-RF-Workshop-Piotr-Tracz.pdf

12 ESS RF Systems

Speaker: Dr Rutambhara Yogi (ESS)

18:00 Dinner

Thursday, 17 November

Welcome to PSI

slides PSI_PresentationMod.pptx

Session 5: Contributions from MAX-IV and SLS

Convener: Dr Patrick Marchand (Synchrotron SOLEIL)

13 RF operation at the SLS and status of the SLS2 proposal

In spring several hours of accumulated down time occurred because of klystron reflected power interlock. A dozen of power glitches caused the LINAC- and storage-ring RF systems to trip. In the LINAC pulse forming network cabinet, a high voltage cable was burnt due to arcing and triggered the fire extinguishing system. Mayor maintenance tasks of this year include and refurbishment of power supplies of the klystron supply units. In summer 2016, the spare cavity was powered by the solid state amplifier and conditioned in the teststand. First tests to operate the booster cavity with the solid state amplifier were successful.The current status of the SLS upgrade proposal is presented with estimates of collective effects.

Speaker: Dr Lukas Stingelin (Paul Scherrer Institute)

Slides 2016_ESLS_RFws_SLS.pptx

14 Solid-state amplifier developments in PSI

We describe the developments of our solid-state power amplifier technology in the Swiss Light Source (PSI). We will discuss about the installation, tests, control system, and test-stand system.

Speaker: Dr Marcos Andre Gaspar (Paul Scherrer Institut)

15 Status of MAX IV Laboratory

-MAX IV Overview -Commissioning and operational status -Ongoing and future project

Speaker: Mr Aleksandar Mitrovic (MAX IV Laboratory)

10:15 Coffee Break

Photo Session

Session 6: Contributions from ELETTRA and from SwissFEL LLRF

Convener: Dr Peter Hartmann (DELTA, TU-Dortmund University)

16 Status of the Elettra RF plants

Description of the 500 MHz reliability , failure statistics, servicing ...

Speaker: Dr Vincenzo Ingravallo (Elettra - Sincrotrone Trieste)

Slides 20_ESLS_RF_WS_2016_-_Ingravallo.pptx

17 R/Q cavity measurement

Perturbation's measurement performed on the Sesame and Indus II cavities: motivation and results.

Speaker: Dr Cristina Pasotti (Elettra - Sincrotrone Trieste)

18 An overview of the SwissFEL LLRF system and its potential use in the SLS

The digital LLRF system for the SwissFEL was an internal development in the years 2012-2016 and is currently being installed and commissioned in the accelerator. It covers the different accelerating frequencies from S-band to C-band up to X-band and is built up in modular units. The tight SwissFEL requirements for stability demand a LLRF system which is capable to precisely measure amplitude and phase. The developed system fulfills these needs and would therefore also come into consideration for the SLS RF stations. This presentation gives an introduction to the SwissFEL LLRF system architecture and summarizes its features and performance characterization results. A comparison with the requirements of the currently installed analog LLRF system at the SLS leads to an outlook for a rough upgrade proposal in the SLS.

Speaker: Mr Roger Kalt (Paul Scherrer Institut)

Slides 20161117_SwissFEL_LLRF_Overview_for_ESLS-RF-2016_final.pdf

12:00 Lunch

SwissFEL tour

Distribution of the head sets

19 SwissFEL Machine Tour

Speaker: Dr Marco Pedrozzi (Paul Scherrer Institut)

20 SwissFEL tour: Experiments

Speaker: Dr Luc Patthey (Paul Scherrer Institut)

14:45 Transfer to PSI Forum and Coffee Break

SLS Tour

21 SLS Machine Tour

Speaker: Dr Lukas Stingelin (Paul Scherrer Institut)

22 SLS Beam Lines

Speaker: Mr Stefan Mueller (Paul Scherrer Institut)