کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9818163 | 1518777 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Recent optimization of the beam-optical characteristics of the 6Â MV van de Graaff accelerator for high brightness beams at the iThemba LABS NMP facility
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Recent optimization of the beam-optical characteristics of the 6Â MV van de Graaff accelerator for high brightness beams at the iThemba LABS NMP facility Recent optimization of the beam-optical characteristics of the 6Â MV van de Graaff accelerator for high brightness beams at the iThemba LABS NMP facility](/preview/png/9818163.png)
چکیده انگلیسی
With the aim of improving the reliability and stability of the beams delivered to the nuclear microprobe at iThemba LABS, as well as optimization of the beam characteristics along the van de Graaff accelerator beamlines in general, relevant modifications were implemented since the beginning of 2003. The design and layout of the beamlines were revised. The beam-optical characteristics through the accelerator, from the ion source up to the analysing magnet directly after the accelerator, were calculated and the design optimised, using the computer codes TRANSPORT, IGUN and TOSCA. The ion source characteristics and optimal operating conditions were determined on an ion source test bench. The measured optimal emittance for 90% of the beam intensity was about 50Ï mm mrad for an extraction voltage of 6 kV. These changes allow operation of the Nuclear Microprobe at proton energies in the range 1 MeV-4 MeV with beam intensities of tenths of a pA at the target surface. The capabilities of the nuclear microprobe facility were evaluated in the improved beamline, with particular emphasis to bio-medical samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 231, Issues 1â4, April 2005, Pages 101-105
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 231, Issues 1â4, April 2005, Pages 101-105
نویسندگان
J.L. Conradie, M.E.M. Eisa, P.J. Celliers, J.L.G. Delsink, D.T. Fourie, J.G. de Villiers, P.M. Maine, K.A. Springhorn, C.A. Pineda-Vargas,