Double-decker femtosecond electron beam accelerator for pulse radiolysis

Journal Article · Sat Apr 15 04:00:00 EDT 2006 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.2195090· OSTI ID:20779192

Jinfeng, Yang; Kondoh, Takafumi; Yoshida, Akira; Yoshida, Youichi ^[1]

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1. Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047 (Japan)

A new concept of double-decker electron beam accelerator based on a photocathode radio-frequency (rf) gun was proposed for studying chemical kinetics and primary processes or reactions of radiation chemistry. The synchronized double-decker electron beams with time interval of 1.4 ns were generated in the rf gun by injecting two laser beams on the photocathode. The double-decker electron beams were accelerated by a booster linear accelerator (linac) up to 31.8 MeV with energy-phase correlation and compressed into femtosecond by rotating the bunch in the energy-phase distribution in magnetic fields. The normalized transverse emittance of both beams downstream of the linac was obtained to be 2.5{+-}0.6 mm mrad for the up beam with bunch charge of 0.47 nC and 3.6{+-}0.7 mm mrad for the down beam with bunch charge of 0.65 nC. The minimum relative energy spread was (0.14{+-}0.03)% for the two beams. The compressed bunch length was obtained to be 430{+-}25 fs for the up bunch and 510{+-}20 fs for the down bunch.

• OSTI ID: 20779192
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 4 Vol. 77; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM BUNCHING
ELECTRON BEAMS
LASERS
LINEAR ACCELERATORS
MAGNETIC FIELDS
MEV RANGE 10-100
PHOTOCATHODES
PULSES
RADIATION CHEMISTRY
RADIOLYSIS
RADIOWAVE RADIATION
RF SYSTEMS