Abstract
We have evaluated a 20-in. photoelectric lens image intensifier tube (PLI) to be mounted on the spherical focal surface of the Ashra light collectors, where Ashra stands for All-sky Survey High Resolution Air-shower Detector, an unconventional optical collector complex that images air showers produced by very high energy cosmic-ray particles in a 42°-diameter field of view with a resolution of a few arcminutes. The PLI, the worlds largest image intensifier, has a very large effective photocathode area of 20-in. diameter and reduces an image size to less than 1-in. diameter using the electric lens effect. This enables us to use a solid-state imager to take focal surface images in the Ashra light collector. Thus, PLI is a key technology for the Ashra experiment to realize a much lower pixel cost in comparison with other experiments using photomultiplier arrays at the focal surface. In this paper we present the design and performance of the 20-in. PLI.
| Original language | English |
|---|---|
| Pages (from-to) | 34-38 |
| Number of pages | 5 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
| Volume | 647 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2011 Aug 11 |
| Externally published | Yes |
Keywords
- Ashra experiment
- First generation image intensifier tube
- High energy astrophysics
- Large sensitive area
- Photodetector
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Instrumentation