LEDS Workshop – Longitudinal Electron beam Dynamics for coherent light Sources

Oct 3, 2023, 10:00 AM → Oct 5, 2023, 5:30 PM Europe/Rome

ENEA Frascati, Rome

Federico Nguyen (ENEA), Simone Di Mitri (Elettra Sincrotrone Trieste)

The workshop aims at collecting the most recent advancements in the controlled generation of high brightness electron beams from photo-injectors for coherent light sources. These include in particular seeded X-ray free-electron lasers and multi-THz superradiant sources. The workshop will move from lessons learned during the CompactLight design study. Theoretical, numerical and experimental studies will be presented and reviewed during round tables. Open routes of research in the manipulation of modulated electron beams will be investigated. Future experiments, supported by specific technological developments, and their comparison with accurate massive simulations, will be proposed in the framework of the LEAPS initiative. A round table for the definition of a LEAPS project proposal is planned at the end of the workshop, and open to all participants.

The program is made of 6 sessions. These include invited talks and round tables (see Scientific Programme). Posters (in format A0, portrait orientation) could be presented under approval by the Local Organizing Committee.

The workshop will take place from October 3 to October 5, 2023. It is hosted by ENEA in Frascati, near Rome, Italy. It is organized by Elettra Sincrotrone Trieste and ENEA, and financed by Elettra Sincrotrone Trieste and LEAPS. The number of participants is limited to 65. Registration is mandatory and participation possible only under approval by the Local Organizing Committee.

The workshop is intended to be in person only. A bus service from Frascati village to ENEA and return will be made available during the workshop.

WIFI connection will be free, through the Eduroam network. Please make sure to have a valid Eduroam account to access (https://eduroam.org/).

Tuesday, October 3

2:20 PM → 2:35 PM Welcome

F. Nguyen (ENEA) and S. Di Mitri (Elettra)

2:35 PM → 3:50 PM CompactLight, lessons learned

Contributions from CompactLight studies on facility design, bunch compression, microbunching instability, seeded free-electron laser schemes.

2:35 PM CompactLight: how to write a proposal

Speaker: Gerardo D'Auria (Elettra Sincrotrone Trieste)

3:00 PM CompactLight: bunch compression, microbunching instability and seeding aspects

Speaker: Andrea Latina (CERN)

3:25 PM Beam loading effects in photo-injectors, simulations and measurements

Speaker: Javier Olivares Herrador (CERN)

3:50 PM → 4:10 PM Q & A

4:10 PM → 4:30 PM Break

4:30 PM → 5:45 PM New coherent light sources

New concepts of FEL sources, from the THz to the X-ray wavelength range, are presented and discussed.

4:30 PM Linac-driven beam physics at Eupraxia@SPARC_Lab

Speaker: Cristina Vaccarezza (INFN-LNF)

4:55 PM The DALI project at HZDR

Speaker: TBD (HZDR)

5:20 PM THz source @ PITZ as pump for X-ray FELs

Speaker: Mikhail Krasilnikov (DESY)

5:45 PM → 6:30 PM Q & A

Wednesday, October 4

9:00 AM → 10:15 AM On the true origin of microbunching

Fundamental processes in the production of high brightness electron beams from photo-injectors are investigated, from both the theoretical and the experimental point of view.

9:00 AM Insights on slice energy spread and space charge in photoinjectors

Speaker: Christopher James Richard (DESY)

9:25 AM Modelling and observation of intrabeam scattering in photoinjectors

Speaker: Thomas Lucas Geoffrey (PSI)

9:50 AM Energy spread measurements at the European XFEL

Speaker: Stuart Walker (EUXFEL)

10:15 AM → 11:00 AM Q & A

11:00 AM → 11:20 AM Break

11:20 AM → 12:10 PM On the true origin of microbunching

Fundamental processes in the production of high brightness electron beams from photo-injectors are investigated, from both the theoretical and the experimental point of view.

11:20 AM Self-consistent intrabeam scattering methods

Speaker: Andreas Adelmann (PSI)

11:45 AM Laser heater for a multi-stage compressor superconducting FEL driver

Speaker: Philipp Amstutz (DESY)

12:10 PM → 1:00 PM Q & A

1:00 PM → 2:00 PM Lunch

2:00 PM → 2:50 PM Diagnostics of microbunching and beam manipulation

Diagnotsic tools, techniques, and recent advancements in the characterization and control of modulated electron beams are presented.

2:00 PM Widely tunable electron bunch trains for the generation of high-power narrowband 1–10 THz radiation

Speaker: Lixin Yan (Tsinghua University)

2:25 PM Compact and versatile infrared spectrometer for microbunching detection

Speaker: Carlo Spezzani (Elettra Sincrotrone Trieste)

2:50 PM → 3:10 PM Q & A

3:10 PM → 4:25 PM Diagnostics of microbunching and beam manipulation

Diagnotsic tools, techniques, and recent advancements in the characterization and control of modulated electron beams are presented.

3:10 PM Electron beam manipulation using self-induced fields

Speaker: Paolo Craievich (PSI)

3:35 PM Self-locked time-resolved measurements with a passive streaker

Speaker: Alexander Malyzhenkov (CERN)

4:00 PM Commissioning results of the MAX-IV transverse deflecing cavity

Speaker: TBD (MAX-IV, STFC)

4:25 PM → 4:50 PM Q & A

7:45 PM → 9:45 PM Social dinner

Thursday, October 5

8:30 AM → 9:20 AM Magnetic lattices

Advanced studies of magnetic bunch length compression, magnetic linearization, electro-optical control of microbunching instability and coherent synchrotron radiation are reviewed and discussed.

8:30 AM Experience with magnetic linearization, longitudinal jitters and outlook to HB-SASE

Speaker: Sara Thorin (MAX-IV)

8:55 AM Coherent synchrotron radiation and microbunching instability at FERMI

Speaker: Alexander Darius Brynes (Elettra Sincrotrone Trieste)

9:20 AM → 10:00 AM Q & A

10:00 AM → 10:20 AM Break

10:20 AM → 11:35 AM Magnetic lattices

Advanced studies of magnetic bunch length compression, magnetic linearization, electro-optical control of microbunching instability and coherent synchrotron radiation are reviewed and discussed.

10:20 AM High order design of magnetic compressors

Speaker: Peter Williams (STFC)

10:45 AM Microbunching instability in multi-bend lines

Speaker: TBD

11:10 AM Microbunching gain and beam shaping with velocity bunching vs. magnetic compression

Speaker: Anna Giribono (INFN-LNF)

11:35 AM → 12:15 PM Q & A

12:15 PM → 1:15 PM Lunch

1:15 PM → 3:15 PM LEDS proposal for LEAPS