Fiber Optic Picosecond Laser Pulse Transmission Line for Hydrogen Ion Beam Profile Measurement

Journal Article · Tue Jan 01 00:00:00 EST 2013 · Applied Optics

OSTI ID:1091642

Liu, Yun ^[1]; Huang, Chunning ^[1]; Aleksandrov, Alexander V ^[1]

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1. ORNL

We present a fiber optic laser pulse transmission line for non-intrusive longitudinal profile measurement of the hydrogen ion (H-) beam at the front-end of the Spallation Neutron Source (SNS) accelerator. The 80.5 MHz, 2.5 ps, multi-killowatt optical pulses are delivered to the accelerator beam line through a large mode area polarization maintaining optical fiber to ensure a high measurement stability. The transmission efficiency, output laser beam quality, pulse jitter and pulse width broadening over a 100-ft fiber line are experimentally investigated. A successful measurement of the H- beam microbunch (~130 ps) profile is obtained. Our experiment is the first demonstration of particle beam profile diagnostics using fiber optic laser pulse transmission line.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1091642
• Journal Information: Applied Optics, Vol. 52, Issue 19
• Country of Publication: United States
• Language: English

Related Subjects

picosecond pulse
fiber optic
pulse width
H- beam
longitudinal profile