Abstract
The industrial implanter MPB-200 has been modified to a light-isotope mass spectrometer. Mass-resolution has been improved by combination of quadrupole focusing system and a collimator with additional scattering shielding. Single beam method has been set up, in which mass-spectrum are obtained by scanning magnetic field of the separator. A start-stop control system has been added to operate automatically the magnet and registration system, from which signals are transferred to a XT/AT computer for saving and analysis. The mass-resolution is satisfactory for analysis of light isotopes with mass number A less than 40. A testing measurement has been done with standard samples of natural and enriched N-15 isotope, at acceleration energy of 50 keV, beam current less than 100 nA, vacuum of 4x10E-6 and collimator`s shell of 1 mm. Obtained resolution and background condition allowed to achieve a good linear dependence of relative isotope ratio data vs real abundance in the range from natural 0.365% to 5.0% with a 3% error (96% of reliability). Routine N-15 may achieve (5-10)% accuracy by a 7-10 minutes measurement for every sample. Sensitivity of the mass-spectrometer is better almost by one order in comparing with one of emission spectrometers. The new mass-spectroscopy system is applied
More>>
Thuan, Vo Van;
Nhan, Dang Duc;
Phuc, Nguyen;
Dung, Nguyen Tien;
[1]
Dach, Nguyen Van
[2]
- Inst. of Nuclear Science and Technology, Hanoi (Viet Nam)
- Morning Star Semiconductor Company, Hanoi (Viet Nam)
Citation Formats
Thuan, Vo Van, Nhan, Dang Duc, Phuc, Nguyen, Dung, Nguyen Tien, and Dach, Nguyen Van.
Method of N-15 analysis by mass-spectroscopy on ion implanter MPB-200.
Viet Nam: N. p.,
1993.
Web.
Thuan, Vo Van, Nhan, Dang Duc, Phuc, Nguyen, Dung, Nguyen Tien, & Dach, Nguyen Van.
Method of N-15 analysis by mass-spectroscopy on ion implanter MPB-200.
Viet Nam.
Thuan, Vo Van, Nhan, Dang Duc, Phuc, Nguyen, Dung, Nguyen Tien, and Dach, Nguyen Van.
1993.
"Method of N-15 analysis by mass-spectroscopy on ion implanter MPB-200."
Viet Nam.
@misc{etde_10136840,
title = {Method of N-15 analysis by mass-spectroscopy on ion implanter MPB-200}
author = {Thuan, Vo Van, Nhan, Dang Duc, Phuc, Nguyen, Dung, Nguyen Tien, and Dach, Nguyen Van}
abstractNote = {The industrial implanter MPB-200 has been modified to a light-isotope mass spectrometer. Mass-resolution has been improved by combination of quadrupole focusing system and a collimator with additional scattering shielding. Single beam method has been set up, in which mass-spectrum are obtained by scanning magnetic field of the separator. A start-stop control system has been added to operate automatically the magnet and registration system, from which signals are transferred to a XT/AT computer for saving and analysis. The mass-resolution is satisfactory for analysis of light isotopes with mass number A less than 40. A testing measurement has been done with standard samples of natural and enriched N-15 isotope, at acceleration energy of 50 keV, beam current less than 100 nA, vacuum of 4x10E-6 and collimator`s shell of 1 mm. Obtained resolution and background condition allowed to achieve a good linear dependence of relative isotope ratio data vs real abundance in the range from natural 0.365% to 5.0% with a 3% error (96% of reliability). Routine N-15 may achieve (5-10)% accuracy by a 7-10 minutes measurement for every sample. Sensitivity of the mass-spectrometer is better almost by one order in comparing with one of emission spectrometers. The new mass-spectroscopy system is applied to research in agriculture, biology and environmental study. (author). 4 refs, 4 figs.}
place = {Viet Nam}
year = {1993}
month = {Nov}
}
title = {Method of N-15 analysis by mass-spectroscopy on ion implanter MPB-200}
author = {Thuan, Vo Van, Nhan, Dang Duc, Phuc, Nguyen, Dung, Nguyen Tien, and Dach, Nguyen Van}
abstractNote = {The industrial implanter MPB-200 has been modified to a light-isotope mass spectrometer. Mass-resolution has been improved by combination of quadrupole focusing system and a collimator with additional scattering shielding. Single beam method has been set up, in which mass-spectrum are obtained by scanning magnetic field of the separator. A start-stop control system has been added to operate automatically the magnet and registration system, from which signals are transferred to a XT/AT computer for saving and analysis. The mass-resolution is satisfactory for analysis of light isotopes with mass number A less than 40. A testing measurement has been done with standard samples of natural and enriched N-15 isotope, at acceleration energy of 50 keV, beam current less than 100 nA, vacuum of 4x10E-6 and collimator`s shell of 1 mm. Obtained resolution and background condition allowed to achieve a good linear dependence of relative isotope ratio data vs real abundance in the range from natural 0.365% to 5.0% with a 3% error (96% of reliability). Routine N-15 may achieve (5-10)% accuracy by a 7-10 minutes measurement for every sample. Sensitivity of the mass-spectrometer is better almost by one order in comparing with one of emission spectrometers. The new mass-spectroscopy system is applied to research in agriculture, biology and environmental study. (author). 4 refs, 4 figs.}
place = {Viet Nam}
year = {1993}
month = {Nov}
}