A modification of the laser detonation-type hyperthermal oxygen atom beam source for a long-term operation

Hiroshi Kinoshita; Shunsuke Yamamoto; Hideaki Yatani; Nobuo Ohmae

doi:10.1063/1.2957613

A modification of the laser detonation-type hyperthermal oxygen atom beam source for a long-term operation

Hiroshi Kinoshita, Shunsuke Yamamoto, Hideaki Yatani, Nobuo Ohmae

Graduate School of Natural Science and Technology

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

It has been an impedimental problem, for the laser detonation-type atom beam generator, that a poppet in the pulsed supersonic valve is rapidly eroded by the irradiation of powerful laser light and high temperature plasma. In order to operate the atom beam source for a long duration, a modification was made to hide the poppet from direct irradiation of laser and plasma. The alteration of device configuration resulted in great improvement in endurance of poppet more than 300 000 repetitions. Morphology of a polyimide film exposed to approximately 200 000 pulses of hyperthermal oxygen atom beam showed a shaglike carpet structure, which is a characteristic to that exposed to energetic oxygen atoms. A flux of the oxygen atom beam was estimated to be 5 × 10 ¹⁴ atoms/cm²/pulse at a location of 30 cm away from the nozzle throat.

Original language	English
Article number	073109
Journal	Review of Scientific Instruments
Volume	79
Issue number	7
DOIs	https://doi.org/10.1063/1.2957613
Publication status	Published - 2008

ASJC Scopus subject areas

Instrumentation

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10.1063/1.2957613

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title = "A modification of the laser detonation-type hyperthermal oxygen atom beam source for a long-term operation",

abstract = "It has been an impedimental problem, for the laser detonation-type atom beam generator, that a poppet in the pulsed supersonic valve is rapidly eroded by the irradiation of powerful laser light and high temperature plasma. In order to operate the atom beam source for a long duration, a modification was made to hide the poppet from direct irradiation of laser and plasma. The alteration of device configuration resulted in great improvement in endurance of poppet more than 300 000 repetitions. Morphology of a polyimide film exposed to approximately 200 000 pulses of hyperthermal oxygen atom beam showed a shaglike carpet structure, which is a characteristic to that exposed to energetic oxygen atoms. A flux of the oxygen atom beam was estimated to be 5 × 10 14 atoms/cm2/pulse at a location of 30 cm away from the nozzle throat.",

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T1 - A modification of the laser detonation-type hyperthermal oxygen atom beam source for a long-term operation

AU - Kinoshita, Hiroshi

AU - Yamamoto, Shunsuke

AU - Yatani, Hideaki

AU - Ohmae, Nobuo

PY - 2008

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AB - It has been an impedimental problem, for the laser detonation-type atom beam generator, that a poppet in the pulsed supersonic valve is rapidly eroded by the irradiation of powerful laser light and high temperature plasma. In order to operate the atom beam source for a long duration, a modification was made to hide the poppet from direct irradiation of laser and plasma. The alteration of device configuration resulted in great improvement in endurance of poppet more than 300 000 repetitions. Morphology of a polyimide film exposed to approximately 200 000 pulses of hyperthermal oxygen atom beam showed a shaglike carpet structure, which is a characteristic to that exposed to energetic oxygen atoms. A flux of the oxygen atom beam was estimated to be 5 × 10 14 atoms/cm2/pulse at a location of 30 cm away from the nozzle throat.

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