Negative deuterium ion thermal energy measurements in a volume ion source

Marthe Bacal; C. Courteille; Pascal Devynck; Yolanda Jones-King; Renan Leroy; Raul A. Stern

doi:10.1117/12.43534

1 April 1991 Negative deuterium ion thermal energy measurements in a volume ion source

Marthe Bacal, C. Courteille, Pascal Devynck, Yolanda Jones-King, Renan Leroy, Raul A. Stern

Proceedings Volume 1407, Intense Microwave and Particle Beams II; (1991) https://doi.org/10.1117/12.43534
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

1407_64A diagnostic technique has been developed to determine the negative hydrogen ion (H-/D-) thermal energy in a variety of conditions in a volume production ion source. The method is based on Nd:YAG laser photodetachment of the negative ions. The photodetachment produces local changes in the ion and electron densities, whose space and time evolution are traced by the use of a probe and a time-delayed second Nd:YAG laser pulse. The results of measurements using this technique for deuterium ions are described. Information was collected from the center of the source to near the plasma electrode. The effects of the presence of electric and magnetic fields near the probe during measurements are addressed. The present study demonstrates that the extracted ion current is equal to the thermal flux through the extraction aperture.

Citation Download Citation

Marthe Bacal, C. Courteille, Pascal Devynck, Yolanda Jones-King, Renan Leroy, and Raul A. Stern "Negative deuterium ion thermal energy measurements in a volume ion source", Proc. SPIE 1407, Intense Microwave and Particle Beams II, (1 April 1991); https://doi.org/10.1117/12.43534

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