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ch4 ion beams

Laser and Particle Beams (1)

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Performance of a pulsed ion beam with a renewable cryogenically cooled ion source
T.J. Renk, G.A. Mann, G.A. Torres
Journal:

Laser and Particle Beams / Volume 26 / Issue 4 / December 2008

Published online by Cambridge University Press:

18 September 2008, pp. 545-554
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For operation of an ion source in an intense ion beam diode, it is desirable to form a localized and robust source of high purity. A cryogenically operated ion source has great promise, since the ions are formed from a condensed high-purity gas, which has been confined to a relatively thin ice layer on the anode surface. Previous experiments have established the principles of operation of such an ion source, but have been limited in repetitive duration due to the use of short-lived liquid He cooling of the anode surface. We detail here the successful development of a “Cryo-Diode” in which the cooling was achieved with a closed-cycle cryo-pump. This results in an ion source design that can potentially be operated for an indefinite duration. Time-of-flight measurements with Faraday cups indicate that the resultant ion beam is of high-purity, and composed of singly charged ions formed out of the gas frozen out on the anode surface.

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Performance of a pulsed ion beam with a renewable cryogenically cooled ion source

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Performance of a pulsed ion beam with a renewable cryogenically cooled ion source