发明名称 |
Method and apparatus for thermalization of ions |
摘要 |
A method of pulsing gas in a quadrupole ion trap to reduce excess internal energy of ions formed externally to the trap at high-vacuum conditions by laser desoprtion is disclosed. With pulsed gas introduction, pressures greater than those under which traps are normally operated can be achieved over a few milliseconds. Under these elevated pressure transients, the process of translational cooling is accelerated and ions undergo thermalized collisions before dissociation occurs. Minimization of uncontrolled fragmentation (thermalization) and enhanced sensitivity are observed at pressures exceeding a threshold of about 1 mTorr.
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申请公布号 |
US2010270465(A1) |
申请公布日期 |
2010.10.28 |
申请号 |
US20070308456 |
申请日期 |
2007.06.14 |
申请人 |
KRATOS ANALYTICAL LIMITED |
发明人 |
RAPTAKIS EMMANUEL;PAPANASTASIOU DIMITRIS;BOWDLER ANDREW |
分类号 |
H01J49/26;H01J49/02;H01J49/40 |
主分类号 |
H01J49/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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