Zobrazeno 1 - 10
of 51
pro vyhledávání: '"U.A.S Tapper"'
Autor:
C.B Franklyn, W. R. McMurray, J.I.W. Watterson, K Richardson, A Waites, J Guzek, U.A.S Tapper
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 152:515-526
Two different technical solutions to the problem of generation of mono-energetic fast neutron beams on the gaseous targets are presented here. A simple and cost-effective design of a cooled windowed gas target system is described in the first part of
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 139:471-475
Low energy accelerator-based neutron sources have promising potential for use in a clinical treatment of cancer with boron neutron capture therapy (BNCT) and boron neutron capture synovectomy (BNCS). Such sources often utilise a thick target Be(p,n)
Autor:
Klas Malmqvist, R. Schofield, Yang Changyi, G. Hyltén, N.P.-O. Larsson, Kjell Håkansson, Jan Pallon, U.A.S. Tapper, Erik Swietlicki, Christer Nilsson, Mikael Hult, J. M. Knox
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 77:3-7
The development of a dedicated facility for nuclear microprobe analysis and the experiences from using it are discussed. The general properties of the present Lund nuclear microprobe will be described and the advantages of using a dedicated accelerat
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 77:339-343
The electron beam induced current (EBIC) mode of the scanning electron microscope as well as the ion beam induced current (IBIC) mode of nuclear microprobes have been used for metal oxide silicon (MOS) IC observation. Two types of specimens have been
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 77:56-61
The design of the data acquisition system for the National Accelerator Centre's nuclear microprobe is described. The system consists of an intelligent PC scanner and imaging terminal, interfaced to a VAX-11/750 running a general purpose data acquisit
Autor:
J.V. Pilcher, P.J. Groenewald, C.L. Churms, G.F. Ackermann, G. De Villiers, K.A. Springhorn, U.A.S. Tapper, H. Schmitt, T. Swart, W.R. McMurray, J. Kritzinger, C.A. Pineda, D. T. Fourie
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 77:17-24
The advantage of using the H2 part of the beam for the acceleration of hydrogen ions is demonstrated. An order of magnitude improvement in beam brightness is measured for two ion sources: a duoplasmatron and a Penning source. The high-momentum beams
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 62:155-161
The grid-shadow technique has proved to be an important tool for the characterization of the quadrupole lenses used for focusing the ion beam in nuclear microprobes. A technique is described which can identify and distinguish between beam aberrations
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 61:226-229
If a nuclear microprobe with a beam size in the submicron region is to be attained, an objective measure of beam profile is a prerequisite. We have developed an automatic beam-focusing system for the Lund achromatic lens system. Using a knife-edge me
Autor:
U.A.S. Tapper, K. G. Malmqvist
Publikováno v:
Analytical Chemistry. 63:715A-725A
Autor:
Jan Pallon, U.A.S. Tapper
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :1270-1273
When using STIM for imaging of thin biological sections, the obtainable energy resolution is an important parameter. A comparison is made between three detector types, a conventional silicon surface barrier detector, a photodiode and a time of flight