Characterization of multicusp-plasma ion source brightness using micron-scale apertures

2001 ◽  
Vol 19 (6) ◽  
pp. 2602 ◽  
Author(s):  
K. L. Scott ◽  
T.-J. King ◽  
K.-N. Leung ◽  
R. F. Pease
Keyword(s):  
Ion Source ◽  
Plasma Ion Source

scholarly journals SPES: EXOTIC BEAMS FOR NUCLEAR PHYSICS STUDIES

2014 ◽  
Vol 27 ◽  
pp. 1460145 ◽  
Author(s):  
ALBERTO ANDRIGHETTO ◽  
MATTIA MANZOLARO ◽  
STEFANO CORRADETTI ◽  
DANIELE SCARPA ◽  
JESU VASQUEZ ◽  
...  
Keyword(s):  
Nuclear Physics ◽  
Ion Beam ◽  
Ion Source ◽  
Beam Power ◽  
Critical Element ◽  
Laser Ion Source ◽  
The Status ◽  
Direct Target ◽  
Neutron Rich Isotopes ◽  
Plasma Ion Source

The SPES project at Laboratori di Legnaro of INFN (Italy) is concentrating on the production of neutron-rich radioactive nuclei for nuclear physics experiments using uranium fission at a rate of 1013 fission/s. The emphasis on neutron-rich isotopes is justified by the fact that this vast territory has been little explored. The Radioactive Ion Beam (RIB) will be produced by the ISOL technique using proton induced fission on a direct target of UCx. The most critical element of the SPES project is the Multi-Foil Direct Target. Up to the present time, the proposed target represents an innovation in terms of its capability to sustain the primary beam power. This talk will present the status of the project financed by INFN, which is actually in the construction phase at Legnaro. In particular, developments related to the target and the ion-source activities using the surface ion source, plasma ion source, and laser ion source techniques will be reported.

scholarly journals Characterization of charge separation in the array of Micromachined UltraSonic Electrospray (AMUSE) ion source for mass spectrometry

2009 ◽  
Vol 20 (9) ◽  
pp. 1684-1687 ◽  
Author(s):  
Thomas P. Forbes ◽  
R. Brent Dixon ◽  
David C. Muddiman ◽  
F. Levent Degertekin ◽  
Andrei G. Fedorov
Keyword(s):  
Mass Spectrometry ◽  
Charge Separation ◽  
Ion Source

scholarly journals Characterization of hydrogen plasma in a permanent ring magnet based helicon plasma source for negative ion source research

2019 ◽  
Vol 61 (6) ◽  
pp. 065003 ◽  
Author(s):  
A Pandey ◽  
Debrup Mukherjee ◽  
Dipshikha Borah ◽  
M Bandyopadhyay ◽  
Himanshu Tyagi ◽  
...  
Keyword(s):  
Hydrogen Plasma ◽  
Plasma Source ◽  
Ion Source ◽  
Negative Ion ◽  
Helicon Plasma ◽  
Ring Magnet

scholarly journals Characterization of the mass-dependent transmission efficiency of a CIMS

2016 ◽  
Vol 9 (4) ◽  
pp. 1449-1460 ◽  
Author(s):  
Martin Heinritzi ◽  
Mario Simon ◽  
Gerhard Steiner ◽  
Andrea C. Wagner ◽  
Andreas Kürten ◽  
...  
Keyword(s):  
Mass Spectrometer ◽  
Chemical Ionization ◽  
Transmission Efficiency ◽  
Ion Source ◽  
Mass Discrimination ◽  
Perfluorinated Acids ◽  
Relative Transmission ◽  
The Absolute ◽  
Primary Ions

Abstract. Knowledge about mass discrimination effects in a chemical ionization mass spectrometer (CIMS) is crucial for quantifying, e.g., the recently discovered extremely low volatile organic compounds (ELVOCs) and other compounds for which no calibration standard exists so far. Here, we present a simple way of estimating mass discrimination effects of a nitrate-based chemical ionization atmospheric pressure interface time-of-flight (CI-APi-TOF) mass spectrometer. Characterization of the mass discrimination is achieved by adding different perfluorinated acids to the mass spectrometer in amounts sufficient to deplete the primary ions significantly. The relative transmission efficiency can then be determined by comparing the decrease of signals from the primary ions and the increase of signals from the perfluorinated acids at higher masses. This method is in use already for PTR-MS; however, its application to a CI-APi-TOF brings additional difficulties, namely clustering and fragmentation of the measured compounds, which can be treated with statistical analysis of the measured data, leading to self-consistent results. We also compare this method to a transmission estimation obtained with a setup using an electrospray ion source, a high-resolution differential mobility analyzer and an electrometer, which estimates the transmission of the instrument without the CI source. Both methods give different transmission curves, indicating non-negligible mass discrimination effects of the CI source. The absolute transmission of the instrument without the CI source was estimated with the HR-DMA method to plateau between the m∕z range of 127 and 568 Th at around 1.5 %; however, for the CI source included, the depletion method showed a steady increase in relative transmission efficiency from the m∕z range of the primary ion (mainly at 62 Th) to around 550 Th by a factor of around 5. The main advantages of the depletion method are that the instrument is used in the same operation mode as during standard measurements and no knowledge of the absolute amount of the measured substance is necessary, which results in a simple setup.

scholarly journals Characterization of a cold cathode Penning ion source for the implantation of noble gases beneath 2D monolayers on metals: Ions and neutrals

2016 ◽  
Vol 34 (2) ◽  
pp. 020602 ◽  
Author(s):  
Huanyao Cun ◽  
Annina Spescha ◽  
Adrian Schuler ◽  
Matthias Hengsberger ◽  
Jürg Osterwalder ◽  
...  
Keyword(s):  
Noble Gases ◽  
Ion Source ◽  
Cold Cathode
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