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Related Experiment Video

Updated: Mar 24, 2026

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Published on: August 6, 2018

RF synchronized short pulse laser ion source.

Yasuhiro Fuwa¹, Yoshihisa Iwashita¹, Hiromu Tongu¹

¹Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.

The Review of Scientific Instruments

|March 3, 2016

Summary

A novel laser ion source generates bunched ion beams by extracting ions immediately after laser plasma generation. This method enables efficient injection into radio frequency accelerators, demonstrated by a proof-of-principle experiment yielding bunched ions.

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Last Updated: Mar 24, 2026

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

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Area of Science:

Physics
Accelerator Science
Plasma Physics

Background:

Traditional ion sources face challenges in producing tightly bunched ion beams.
Efficient injection into radio frequency (RF) accelerators requires precisely timed ion bunches.

Purpose of the Study:

To propose and experimentally validate a laser ion source for generating shortly bunched ion beams.
To demonstrate the feasibility of injecting these bunched ions into RF accelerators.

Main Methods:

Utilized an ultra-short pulse laser to generate laser plasma.
Extracted ions immediately after plasma generation to minimize diffusion.
Employed a radio frequency (RF) resonator for ionization and bunching.
Conducted a proof-of-principle experiment using H2 gas within the RF resonator.

Main Results:

Successfully generated bunched ions.
Achieved a peak current of 1.2 mA.
Observed a pulse length of 5 ns.
Verified ion bunching at the RF resonator exit using a probe.

Conclusions:

The proposed laser ion source effectively produces shortly bunched ion beams.
The experimental results confirm the viability of the technique for RF accelerator injection.
This method offers a promising approach for advanced particle acceleration applications.