Daly detector
The topic of Daly detector is an issue that has generated great interest and debate in recent times. With the advancement of technology and changes in society, Daly detector has become a crucial aspect that affects different areas of our lives. On a personal, professional, social and political level, the importance of Daly detector is undeniable. In this article we will explore different aspects related to Daly detector, analyzing its impact and relevance in various contexts. From its origin to its evolution, through its implications and possible consequences, this topic does not leave anyone indifferent. In addition, we will try to shed light on the possible solutions or approaches that can be adopted against Daly detector, with the aim of offering a global and complete vision of this issue that is so relevant today.
 | This article relies largely or entirely on a single source. (December 2021) |
 Schematic of a Daly detector | |
| Inventor | Norman Richard Daly |
|---|---|
| Related items | Microchannel plate detector Electron multiplier |
A Daly detector is a gas-phase ion detector that consists of a metal "doorknob", a scintillator (phosphor screen) and a photomultiplier.[1] It was named after its inventor Norman Richard Daly. Daly detectors are typically used in mass spectrometers.
Principle of operation
Ions that hit the doorknob release secondary electrons. A high voltage (about −20000 V) between the doorknob and the scintillator accelerates the electrons onto the phosphor screen, where they are converted to photons. These photons are detected by the photomultiplier.
The advantage of the Daly detector is that the photomultiplier can be separated by a window, which lets the photons through from the high vacuum of the mass spectrometer, thus preventing an otherwise possible contamination and extending life span of the detector. The Daly detector also allows a higher acceleration after the field-free region of a time-of-flight mass spectrometer flight tube, which can improve the sensitivity for heavy ions.
Norman Richard Daly
Norman Daly was awarded 6 patents in the years 1962–1973 relating to ion detection and mass spectrometers, from his work at the United Kingdom Atomic Energy Authority.
References
- ^ N. R. Daly, Scintillation Type Mass Spectrometer ion Detector Archived 2012-07-17 at archive.today. Rev. Sci. Instrum. 31(3), 264–267 (1960).
| Ion source | |
|---|---|
| Mass analyzer | |
| Detector | |
| MS combination | |
| Fragmentation | |
