Mars Organic Molecule Analyzer (MOMA) - Harsh-Environment ...
Mars Organic Molecule Analyzer (MOMA) - Harsh-Environment ...
Mars Organic Molecule Analyzer (MOMA) - Harsh-Environment ...
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<strong>MOMA</strong> Prototype Design Concept<br />
Low voltage/low power and high mass range using lower trap<br />
frequency and supplemental excitation at very low q eject value<br />
<strong>MOMA</strong> Ion Trap Parameters:<br />
Fundamental _ /2¹<br />
Maximum amplitude V<br />
max<br />
(0-p)<br />
Radius r 0<br />
Axis 2z 0<br />
Mass range in mass-selective instability mode q eject<br />
= 0.908<br />
800 kHz<br />
300 V<br />
<strong>Mars</strong> 2<br />
0.5 cm<br />
0.5 cm<br />
197 Da<br />
Supplemental RF frequency<br />
34.4 kHz<br />
Supplemental RF voltage (axial modulation)<br />
5-10 V<br />
q eject<br />
0.089<br />
Mass range in resonance ejection mode<br />
2,000 Da<br />
Bath gas He or CO<br />
2<br />
Ionization:<br />
Ion introduction:<br />
laser desorption at <strong>Mars</strong> atmosphere (5 -10 Torr)<br />
RF quadrupole ion guide<br />
17
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