| Timetable |
| Download Conference Program |
| Download All Abstracts |
| Zoom Access |
| Corporate Program |
Late Breaking Posters
Day 1, June 22（Sun.）
Room P (Maesato East, Foyer, Ocean Wing)
- 1P-LB-10
New Concept for Detection of charge and m/z of Multiply Charged Particles with High Signal Gain
(1Ningbo University, 2Southeast University)
Dongdong Zhou1, Baiyu Chen2, Mei Xiao2, oLi Ding1
Charge Detection Mass Spectrometry (CDMS) requires detection of charge and mass to charge ratio of each single ion with high accuracy, but it is often disturbed by the electronic noise. Repeated detection in an electrostatic ion trap has been used to solve the problem but the measurement takes extra long time. Conventional Faraday cup or image charge pick-up technique has no signal gain in the detection system itself, so the signal-to-noise ratio purely relies on the low noise charge amplifier.
Here we designed a novel non-destructive detection system for multiply charged ions/particles, where the μm wide low energy electron beams are used as the media in the detection. The ion beam and the electron beams are placed orthogonally and the electric field induced by the passed-by ion deflects the electron beam into the downstream detection slit, under which an electron multiplier senses the increase of electron flow and generates a current pulse output in proportion to the charge of the ion.
Simulation was used to check the concept and factors which cause the charge detection error were analyzed. Based on the simulation a novel and simple CDMS instrument design was proposed.