DETAILY PROJEKTU
| Název: |
|
Micro-Faraday array detektor s vysokým dynamickým rozsahem pro multikolekční izotopický SIMS |
| Spoluřešitel: |
|
Prof. M. Bonner Denton; Prof. Peter Williams |
| Od: |
|
2007-01-01 |
|
| Do: |
|
2010-12-31 |
The aim is to design the 3rd generation of the micro-Faraday array detector for multicollector isotopic secondary
ion mass spectrometry (SIMS). This detector is supposed to reach the sensitivity comparable to that of electron
multipliers (a few counts per seconds) and a high dynamic range (more than 6 orders of magnitude). If we add the
known problems of electron multipliers with count losses at high count rates then the new detector has a potential
to outperform the electron multiplier in the fields where highest accuracy isotopic measurement is required. Our
detector will push the direct current measurement technology to the sensitivity levels of 10-18 Amps. b) To apply
the new detector to the measurement of sulphur and oxygen isotopes, for which the multicollector ion optics is
optimized, and to reach comparable or better accuracy than the state of the art instruments. c) To modify the
SIMS spectrometer for optimal performance for the multicollector detection of other important isotopes (e.g. CN isotopes).
