Extraction of C60 cluster ion beam

Chuanchen, Sun; Haibin, Gao; Dufei, Fang
April 1994
Review of Scientific Instruments;Apr94, Vol. 65 Issue 4, p1405
Academic Journal
A C[sup +, sub 60] ion beam was extracted from a hollow cathode ion source (model 911A). The mass. spectra of 6 kev C[sub 60] and its fragments have been measured. Only those clusters with an even number of C atoms were observed and the largest one was C[sub 84]. The result shows that the fragment ion beam has an exponential distribution, which is similar to that of C[sup +, sub 60]-H[sub 2](He) collision experiments. We also have extracted C-cluster negative-ion beams from a Middleton 860 sputtering source. With a graphite cathode, we have observed many cluster ions which were not previously reported. For a C[sub 60]/C[sub 70] cathode, we have obtained a stable C[sup -, sub 60] ion beam with current of about 1 nA. The spectra of the negative ions are complicated due to the existence of the Cs-C[sub n] clusters.


Related Articles

  • Investigation of an Ion Source Intended for Beam Technologies. Veresov, L. P.; Veresov, O. L.; Litvinov, P. A. // Technical Physics;Apr2000, Vol. 45 Issue 4, p490 

    An ion source with a cold cathode is described, which generates ion beams of various gases and solids of circular cross sections for technological purposes. © 2000 MAIK “Nauka / Interperiodica”.

  • Development and experiments of a MEVVA ion source. Gao, Y.; Yu, Y. J.; Tang, D. L.; Huang, Y. M.; Geng, M.; Gong, X. R. // Review of Scientific Instruments;Apr94, Vol. 65 Issue 4, p1281 

    The MEWA ion source presented in the present paper adopts the arc discharge mechanism with a cathode changeable by a motor for pushing in, and an accel-decel three-grid extraction system. The voltage proof level is higher than 60 kV, the ion source generally runs at a voltage of 40 kV, the...

  • A direct-current Penning surface-plasma source. Smith, H. Vernon; Allison, Paul; Geisik, Carl; Schmitt, David R.; Schneider, J. David; Stelzer, James E. // Review of Scientific Instruments;Apr94, Vol. 65 Issue 4, p1176 

    After developing a pulsed 8X source for H[sup -] beams, we are now testing a cooled, dc version. The design dc power density on the cathode surface is 900 W/cm², much higher than achieved in any previously reported Penning surface-plasma source. The source is designed to accommodate dc arc...

  • A high-brightness duoplasmatron ion source for microprobe secondary-ion mass spectrometry. Coath, C.D.; Long, J.V.P. // Review of Scientific Instruments;Feb1995, Vol. 66 Issue 2, p1018 

    Describes a cold-cathode duoplasmatron ion source for producing beams of Ar[sup +] or O[sup -] that was designed for the Cambridge P7-Concept microprobe secondary-ion mass spectrometer. Construction of the prototype of the source; Magnetic field generation; Measurements of the source size.

  • Test of positive ion beams from a microwave ion source for AMS. Kim, S-W.; Schneider, R. J.; von Reden, K. F.; Hayes, J. M.; Wills, J. S. C.; Kern, W. G. E. // AIP Conference Proceedings;2001, Vol. 576 Issue 1, p407 

    A test facility has been constructed to evaluate high-current positive ion beams from small gaseous samples for AMS applications. The flow of gas into a compact microwave ion source is regulated by a restrictor constructed from vitreous-silica capillary tubing. A double-focusing spectrometer...

  • A hollow cathode ion source as an electron-beam ion source injector for metallic elements. Visentin, B.; Harrault, F.; Gobin, R.; Leroy, P. A. // Review of Scientific Instruments;Apr94, Vol. 65 Issue 4, p1129 

    A hollow cathode ion source (HCIS) has been developed in our Laboratory to produce, by cathodic sputtering in a glow discharge, a one charge metallic ion beam. This source is used as an injector for the electron-beam ion source (EBIS) Dioné that produce, after ion stripping, a highly charged...

  • Vacuum Discharge as an Effective Source of Multiply Charged Ions. Artamonov, M. F.; Krasov, V. I.; Paperny, V. L. // Technical Physics Letters;Dec2001, Vol. 27 Issue 12, p1018 

    The time-of-flight (TOF) spectra measured under high vacuum conditions revealed ion beams of a cathode material (Cu[sup n+]) with a maximum charge of up to +19 generated in the initial stage of a spark discharge development at a storage voltage of up to U[sub 0] = 2.5 kV. As the U[sub 0] value...

  • Decrease in the operating gas pressure in an ion source. Kondrat’ev, B.; Turchin, A.; Turchin, V. // Instruments & Experimental Techniques;Jul2008, Vol. 51 Issue 4, p567 

    The results of use of a cold hollow cathode with a multipole magnetic field in a duoplasmatron-type ion source are described. The operating parameters of a duoplasmatron with the developed cathode and a duoplasmatron with a cold hollow two-cylinder cathode are compared. It is shown that the use...

  • Neutralization of an ion beam from the end-Hall ion source by a plasma electron source based on a discharge in crossed E × H fields. Dostanko, A. P.; Golosov, D. A. // Technical Physics;Oct2009, Vol. 54 Issue 10, p1461 

    The possibility of using a plasma electron source (PES) with a discharge in crossed E × H field for compensating the ion beam from an end-Hall ion source (EHIS) is analyzed. The PES used as a neutralizer is mounted in the immediate vicinity of the EHIS ion generation and acceleration region...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics