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)
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...
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...
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,...
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...
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...
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,...
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...
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...
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...
