IBIC2025 - 14th International Beam Instrumentation Conference

Emittance Characterisation at the RFQ Exit of FETS Using Tomographic reconstruction

9 Sept 2025, 16:00

2h

Teaching Hub 502

Poster Presentation MC04: Transverse Profile and Emittance Monitors TUP

Speakers

Alan Letchford (ISIS Neutron and Muon Source) Emi Yamakawa (ISIS Neutron and Muon Source) Sarah Fisher (ISIS Neutron and Muon Source) Sasan Ahmadiannamin (Science and Technology Facilities Council)

Description

Understanding the transverse emittance of the beam emerging from the RFQ is an important step in commissioning the Front End Test Stand (FETS) accelerator and ensuring proper matching into the downstream transport line. In this work, we present transverse emittance measurements taken at the output of the 3 MeV RFQ using the quadrupole scan method. To complement the RMS analysis, a tomographic reconstruction of the phase space has been carried out, allowing for a more detailed view of the beam distribution, including any asymmetries or non-Gaussian features. The experimental setup, data acquisition process, and reconstruction techniques are described, and the results are compared with simulation to assess RFQ performance. These measurements form part of the broader effort to characterise the beam and optimise the transport through the FETS beamline.