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Asymmetric ion trap

Patent ·
OSTI ID:871261
 [1];  [1];  [2]
  1. Richland, WA
  2. Pasco, WA
+ Show Author Affiliations

An ion trap having two end cap electrodes disposed asymmetrically about a center of a ring electrode. The inner surface of the end cap electrodes are conformed to an asymmetric pair of equipotential lines of the harmonic formed by the application of voltages to the electrodes. The asymmetry of the end cap electrodes allows ejection of charged species through the closer of the two electrodes which in turn allows for simultaneously detecting anions and cations expelled from the ion trap through the use of two detectors charged with opposite polarity.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA
DOE Contract Number:
AC06-76RL01830
Assignee:
Battelle Memorial Institute (Richland, WA)
Patent Number(s):
US 5693941
OSTI ID:
871261
Country of Publication:
United States
Language:
English

References (2)

Detection, damping, and translating the center of the axial oscillation of a charged particle in a Penning trap with hyperbolic electrodes journal February 1984
Simulation study of an ion cage with superimposed multipole fields journal May 1991

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Related Subjects

/250/
allows
anions
application
asymmetric
asymmetrically
asymmetry
cap
cap electrodes
cations
center
charged
charged species
closer
conformed
detecting
detectors
disposed
ejection
electrode
electrodes
electrodes disposed
equipotential
equipotential lines
expelled
formed
harmonic
inner
inner surface
lines
opposite
opposite polarity
pair
polarity
simultaneously
simultaneously detecting
species
surface
trap
voltages