IPAC'23 - 14th International Particle Accelerator Conference

High-gradient accelerating structures for proton radiography booster linac

TUPM007

9 May 2023, 16:30

2h

Sala Mosaici 2

Poster Presentation MC4.A08: Linear Accelerators Tuesday Poster Session

Speakers

Sergey Kurennoy (Los Alamos National Laboratory) Evgenya Simakov (Los Alamos National Laboratory) Haoran Xu (Los Alamos National Laboratory) Muhammed Zuboraj (Los Alamos National Laboratory)

Description

Increasing energy of proton beam at the Los Alamos Neutron Science Center (LANSCE) from 800 MeV to 3 GeV will improve radiography resolution ten-fold. This energy boost can be achieved with a compact cost-effective linac based on normal conducting high-gradient (HG) RF accelerating structures. Such an unusual booster is feasible for proton radiography (pRad), which operates with short beam pulses at very low duty. The pRad booster starts with a short L-band section to capture and compress the 800-MeV proton beam from the existing linac. The main HG linac is based on S- and C-band cavities. An L-band de-buncher at the booster end reduces the beam energy spread at 3 GeV three times below that at the exit of the existing 800-MeV linac. We continue developing proton HG standing-wave structures with distributed RF coupling for the booster. Results of measurements for a two-cell test cavity at the LANL C-band RF Test Stand and a comparison with conventional traveling-wave structures are presented.