Workshop on Timing Modes for Low-emittance Storage Rings

25 Mar 2015, 09:25 → 27 Mar 2015, 13:00 Europe/Stockholm

Elite Hotel Ideon (Lund)

Background

The MAX IV Laboratory currently under construction in Lund will provide a 3 GeV storage ring with an ultralow emittance down to 0.2 nmrad for hard x-rays and a 1.5 GeV storage ring for soft x-rays. The MAX IV design has so far only focused on multibunch operation in the storage rings with a 100 MHz RF system and passive higher harmonic cavities to damp instabilites and increase beam lifetime. The facility will also include a short-pulse beamline for timing experiments which will deliver a 100 fs x-ray pulse of spontaneous radiation from an undulator on the linear accelerator. However, the repetition rate of the short-pulse beamline is limited to about 100Hz.

A discussion about timing modes at MAX IV has been initiated by the user community. The first workshop was held in March 2014 to identify the main user needs for timing modes and timing experiments. A second meeting was organized in connection with the MAX IV User's Meeting in September 2014 (see https://indico.maxlab.lu.se/event/25/picture/21.pdf for the program). Two reports (available for download below) have been written summarizing the status of the user case, and possible accelerator solutions.

Purpose of the Workshop

This workshop is the third meeting to address timing modes at MAX IV. The purpose of this workshop is to discuss challenges and possibilities for timing modes at low-emittance storage rings and to learn from each other's experiences. Three areas of focus have been identified for the workshop:

1. Filling patterns in low-emittance storage rings

2. Resonant pulse picking (incoherent single-bunch excitation)

3. Pseudo single bunch operation (coherent single-bunch excitation)

During the workshop there will also be the possibility to visit the MAX IV construction site.

Organizers

Stacey Sorensen, Lund University, stacey.sorensen@sljus.lu.se (Contact about scientific programme)

Teresia Olsson, MAX IV & Lund University, teresia.olsson@maxlab.lu.se (Contact about practical issues)

Christian Stråhlman, MAX IV & Lund University, christian.strahlman@maxlab.lu.se

Simon C. Leemann, MAX IV, simon.leemann@maxlab.lu.se

Workshop Report

A meeting report was published in Synchrontron Radiation News after the workshop. It is available at http://www.tandfonline.com/eprint/QVNbZcTVdIjHQharVd3E/full

Reports Timing at MAX IV Preliminary report on alternate bunch schemes for the MAX IV storage rings Timing modes at the MAX IV storage rings

Wednesday, 25 March

09:30 → 10:00 Registration and Coffee

10:00 → 10:20 Possibilites for Timing Experiments at MAX IV

Speaker: Prof. Stacey Sörensen (Lund University)

Slides Sorensen_Timing_workshop.pdf

10:20 → 11:00 Timing at MAX IV from the accelerator perspective

Speaker: Teresia Olsson (MAX IV Laboratory)

Slides Timing_at_MAX_IV_from_the_accelerator_perspective.pdf

11:00 → 11:30 Questions and Discussion

Speaker: Prof. Nils Mårtensson (Department of Physics and Astronomy, Uppsala University)

11:30 → 12:30 Lunch

12:30 → 13:00 Studies on filling pattern optimization and passive harmonic cavities

Speaker: Mrs Natalia Milas (Brazilian Synchrotron Light Laboratory)

Slides Presentation_MaxIV_workshop.pptx

13:00 → 13:30 Filling patterns, timing modes, and plans for PSB at SOLEIL

Speaker: Dr Laurent Nadolski (Synchrotron SOLEIL)

Slides TimingMode4LER_soleil-nadolskiv3.pptx

13:30 → 14:30 Questions and Discussion

Speaker: Mr Christian Stråhlman (MAX IV Laboratory, Lund University)

14:30 → 15:00 Coffee/Fika

15:00 → 15:30 Fill patterns with gaps and/or single bunches in storage rings equipped with passive harmonic cavities

Speaker: Dr Christoph Steier (Lawrence Berkeley National Laboratory)

Slides csteier_timing_workshop_lund_20150325.pptx

15:30 → 16:00 Filling patterns, timing modes, and bunch separation schemes for the BESSY VSR project

Speaker: Dr Peter Kuske (Helmholtz-Zentrum Berlin)

Slides Peter_Kuske_March_2015.pdf

16:00 → 16:30 Filling patterns and timing modes with passive bunch lengthening cavities in APS-U

Speaker: Dr Michael Borland (Argonne National Laboratory)

Slides Borland-HHCResults.pdf

16:30 → 17:30 Questions and Discussion

Speaker: Dr Simon Leemann (MAX IV Laboratory)

18:00 → 21:00 Dinner

Thursday, 26 March

09:00 → 09:30 Laser-synchrotron synchronization and pump-probe experiments

Speaker: Dr Jochen Rittmann (Paul Scherrer Institut)

Slides maxlab_20150325b.pdf

09:30 → 10:00 Science drivers for the BESSY-VSR project

Speaker: Prof. Alexander Foehlisch (HZB Helmholtz-Zentrum Berlin fuer Materialien und Energie GmbH)

Slides Talk_AFoehlisch_public.pdf

10:00 → 10:20 Coffee/Fika

10:20 → 10:50 Pulse Picking at BESSY-II: Resonant incoherent excitation and MHz choppers

Speaker: Dr Karsten Holldack (Helmholtz-Zentrum Berlin)

Slides Holldack_PulsePick_Lund.pdf

10:50 → 11:20 Time resolved ESCA and PED with the new 60° ArTOF and Slicing

Speaker: Dr Florian Sorgenfrei (Helmholtz-Zentrum Berlin)

Slides Talk_Timing_Modes_Lund_FS.pdf

11:20 → 11:35 Filling patterns at ESRF

Speaker: Dr jean-luc revol (esrf)

Slides Timing_ESRF.pptx

11:35 → 12:00 Questions and Discussion

Speaker: Rami Sankari (MAX IV laboratory)

12:00 → 13:00 Lunch

13:00 → 13:30 Pseudo-single-bunch operation at the ALS: accelerator requirements and performance

Speaker: David Robin (Lawrence Berkeley National Laboratory)

Slides David_Robin_MAX-IV_2015_Timing_Workshop_v_no_backup.pdf

13:30 → 14:00 Probing ultra-fast electron and spin dynamics using x-ray spectroscopy at kHz to MHz repetition rates

Speaker: Andreas Scholl (Lawrence Berkeley National Lab)

Slides Max4_TimingModes_AS.ppt

14:00 → 14:30 The fast strip-line kicker for ALS PSB: requirements, design, and performance

Speaker: Mr Slawomir Kwiatkowski (LBNL)

Slides Kicker_workshop_Final.ppt

14:30 → 15:10 Questions and Discussion

Speaker: Teresia Olsson (MAX IV Laboratory)

15:10 → 15:30 Coffee/Fika

15:30 → 16:00 Transport to MAX IV site

16:00 → 18:00 Study Visit at the MAX IV Site

18:00 → 18:20 Transport to hotel

Friday, 27 March

09:00 → 10:10 Small Group Discussion and Summary: Filling patterns

notes AfewguidingquestionsfortheGroupDiscussionandSummaryonTimingModes.pdf

09:00 → 10:10 Small Group Discussion and Summary: Pseudo Single Bunch

notes AfewguidingquestionsfortheGroupDiscussionandSummaryonPseudoSingleBunch.pdf

09:00 → 10:10 Small Group Discussion and Summary: Pulse Picking by Resonant Excitation

notes AfewguidingquestionsfortheGroupDiscussionandSummaryonResonantPulsePickingbyResonantExcitation.pdf

10:10 → 10:30 Coffee/Fika

10:30 → 12:00 Conclusions and Summary

Speakers: Mr Christian Stråhlman (MAX IV Laboratory, Lund University) , Prof. Stacey Sörensen (Lund University)

Slides

• Filling_patterns.pdf
• GroupB_Answers.pdf
• PSB_closeout.pdf

12:00 → 13:00 Lunch