6th European Advanced Accelerator Concepts workshop

Session

WG4: High gradient vacuum structures

WG4

19 Sept 2023, 16:20

Hotel Hermitage, La Biodola Bay, Isola d'Elba, Italy

Conveners

WG4: High gradient vacuum structures

• Andrea Mostacci (Sapienza)
• Sami Tantawi (SLAC/Stanford University)

WG4: High gradient vacuum structures

• Andrea Mostacci (Sapienza)
• Sami Tantawi (SLAC/Stanford University)

418. Introduction to WG4

Andrea Mostacci (Sapienza), Sami Tantawi (SLAC/Stanford University)

19/09/2023, 16:20

405. Dielectric Assist Accelerating (DAA) structures for compact linear accelerators of low energy particles in hadrontherapy treatments.

Pablo Martinez-Reviriego (Instituto de Fisica Corpuscular (IFIC))

19/09/2023, 16:25

WG4: High gradient vacuum structures

Oral contribution

Dielectric Assist Accelerating (DAA) structures based on ultralow-loss ceramic are being studied as an alternative to conventional disk-loaded copper cavities. This accelerating structure consists of dielectric disks with irises arranged periodically in metallic structures working under the TM02−𝜋 mode.
Here, the numerical design of an S-band DAA structure for low beta particles, such as...

258. Tunable Dielectric Structure for Extended Interaction Length Laser-Driven Acceleration

Sophie Crisp (UCLA)

19/09/2023, 16:45

WG4: High gradient vacuum structures

Oral contribution

Dielectric Laser Accelerators (DLAs) can support GeV/m gradients, allowing for the possibility of MeV energy gain over only millimeters. Increasing energy gain requires developing tunable multi-mm structures. We present experimental results using a tunable dual grating structure to modulate 6 MeV electrons by up to 200 keV. We observe energy modulation up to an interaction length of 1 mm, the...

240. Coherent Nanophotonic Electron Accelerator

Tomáš Chlouba (Friedrich-Alexander University Erlangen-Nurnberg)

19/09/2023, 17:05

WG4: High gradient vacuum structures

Oral contribution

In 2013 the concept of dielectric or nanophotonic laser acceleration was experimentally demonstrated. Rather simple dielectric gratings with their periodicity matched to the electron velocity, in the same manner as the original Widerøe linear accelerator almost century ago, only driven with light. Now, a decade later, we can demonstrate what one might call a dielectric laser accelerator,...

354. Single Electron Accelerator for Dark Matter Search

Rasmus Ischebeck (PSI)

19/09/2023, 17:25

WG4: High gradient vacuum structures

Oral contribution

We present here a concept of a laser-driven accelerator for single electrons, designed to generate a beam of relativistic electrons for indirect search of dark sector particles.
The beam dynamics is verified by tracking them along the structure using DLAtrack6D. The optimization process, including determining the transverse periodicity lengths, electric field magnitude at the structure's...

186. CEBAF Polarized Positrons and 22 GeV Energy Upgrade

Andrei Seryi (Jefferson Lab)

19/09/2023, 17:45

WG4: High gradient vacuum structures

Oral contribution

CEBAF is a recirculating CW SRF accelerator running polarized electron beams at 12 GeV to fixed targets for nuclear physics study. A very efficient upgrade proposal has been developed for energy increase to 22 GeV without any additional SRF, based on increase of the number of recirculations using new FFA permanent magnet arcs. The polarized positron beam capability, synergistic to the energy...

419. Discussion

19/09/2023, 18:05

416. Introduction to WG4

Andrea Mostacci (Sapienza), Sami Tantawi (SLAC/Stanford University)

21/09/2023, 16:20

234. Development and commissioning of a novel C-band hybrid photoinjector at RadiaBeam

Alex Murokh (RadiaBeam Technologies, LLC.)

21/09/2023, 16:25

WG4: High gradient vacuum structures

Oral contribution

RadiaBeam, in collaboration with UCLA, SLAC, and Amplitude Lasers, is developing a compact tunable ICS gamma ray source for industrial, medical, and security applications. The entire system is designed to be transportable in a standard cargo container, requiring minimizing longitudinal footprints of the individual components. To this end, a compact C-band hybrid photoinjector was developed,...

404. Beam Dynamics Simulation of a High Brightness, High Repetition Rate RF C-band Photoinjector for Future EuPRAXIA@SPARC_LAB Upgrade

Gilles Jacopo Silvi (Istituto Nazionale di Fisica Nucleare)

21/09/2023, 16:45

WG4: High gradient vacuum structures

Oral contribution

High-brightness RF photo-injectors are crucial for generating high peak current and low transverse emittance electron beams, which are necessary for driving plasma Wake-field acceleration in advanced accelerator concepts and novel radiation sources. To enhance the EuPRAXIA@SPARC_LAB photo-injector for future upgrades, it is essential to investigate and assess the feasibility of achieving...

437. High Gradient Cryo-RF Enabled Hard X-ray Free-electron Laser for Chip Metrology

James Rosenzweig (UCLA)

21/09/2023, 17:05

WG4: High gradient vacuum structures

Invited talk

Recently, muc work has been directed at R&D a ultra-compact X-ray FEL (UC-XFEL) based on rapidly emerging techniques in high field cryogenic acceleration, attendant dramatic improvements in beam brightness, and state-of-the-art concepts in beam dynamics, magnetic undulators, and X-ray optics. A full conceptual design of a 1 nm XFEL with a length and cost over an order of magnitude below...

436. Superconducting short period undulators

Sara Casalbuoni

21/09/2023, 17:25

WG4: High gradient vacuum structures

Oral contribution

Short period/high field undulators allow to reach the same photon energy as conventional ones by lower electron beam energies, and they therefore contribute to make accelerator based light sources more compact.
Different efforts have been made in the past decades to reduce the period of the undulators while keeping a high magnetic field on axis B.
We report here on such efforts focusing on...

417. Discussion

21/09/2023, 17:45