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  • AIP Publishing  (2)
  • 1990-1994  (2)
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  • AIP Publishing  (2)
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  • 1990-1994  (2)
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  • 1
    Online Resource
    Online Resource
    Study of pulsed discharge operation of volume H− ion source
    AIP Publishing ; 1994
    In:  Review of Scientific Instruments Vol. 65, No. 4 ( 1994-04-01), p. 1207-1209
    Details
    In: Review of Scientific Instruments, AIP Publishing, Vol. 65, No. 4 ( 1994-04-01), p. 1207-1209
    Abstract: The pulsed operation of a negative ion volume source has been investigated, both with and without a magnetic filter present, under conditions of full-scale acceleration of the extracted negative hydrogen ion beam. This investigation is relevant to the temporal filter concept, which was recently proposed. The observation of three afterglow negative ion peaks is reported. As the negative ion current during the discharge pulse, each of the afterglow peaks can be optimized by varying the pressure, the plasma electrode bias, and the extraction voltage. Under optimum conditions, the negative ion current during the discharge pulse exceeds the afterglow peaks.
    Type of Medium: Online Resource
    ISSN: 0034-6748 , 1089-7623
    URL: Article
    DOI: 10.1063/1.1145059
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1994
    detail.hit.zdb_id: 209865-9
    detail.hit.zdb_id: 1472905-2
    SSG: 11
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Reproducible leaky tube diffusion of Cd in InP at 500 °C
    AIP Publishing ; 1990
    In:  Journal of Applied Physics Vol. 68, No. 3 ( 1990-08-01), p. 969-972
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 68, No. 3 ( 1990-08-01), p. 969-972
    Abstract: We report for the first time the successful application of the leaky tube method to diffuse elemental Cd into InP at 500 °C. Specular surfaces are consistently realized while additional phosphorus in the ambient is not required. Free-carrier concentration profiles and junction depths were experimentally determined for times ranging from 20 min to 21/2 h. A reproducible surface concentration of ionized acceptors is ∼1×1018 cm−3 (T=300 K). A concentration dependent diffusion coefficient ranging from approximately 1×10−14 to 1×10−10 cm2/s is calculated for the conditions under investigation. Secondary ion mass spectroscopy analysis shows the atomic Cd concentration to be very similar to that of the ionized acceptors, with the atomic surface concentration approximately two times greater than the surface hole concentration.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.346662
    Language: English
    Publisher: AIP Publishing
    Publication Date: 1990
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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