Development of a 16-inch UV-ray image intensifier tube

Yoichi Asaoka, Yuichi Aita, Toshifumi Aoki, Makoto Sasaki

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We have developed a 16-inch ultraviolet-ray image intensifier (UVII) tube to form the spherical focal surface of the All-sky Survey High Resolution Air-shower Detector (Ashra) telescope, a new air fluorescence and Cerenkov detector to observe TeV gamma rays, very high energy neutrinos, and extremely high energy cosmic rays. The UVII has a very large effective photocathode area of 16-inch diameter and reduces an image size to 1-inch diameter using the electric lens effect. This enables us to use a solid-state imager to take focal surface images in the Ashra telescope. Thus, UVII 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. The UVII achieves a high resolution of 3.4 Lp/mm at the input window. The output screen of the UVII is made of a fiber optic plate (FOP) with a concave shape to optimize the electric lens configuration under the fixed curvature of input window. This results in an almost uniform resolution over the whole sensitive area. We have adopted a P47 phosphor screen with a 10% decay time of ∼100 ns and have obtained an amplification factor of about 100. In this paper we present the design, construction, and performance of the 16-inch UVII.

Original languageEnglish
Pages (from-to)1773-1778
Number of pages6
JournalIEEE Transactions on Nuclear Science
Volume52
Issue number5 III
DOIs
Publication statusPublished - 2005 Oct
Externally publishedYes

Fingerprint

image intensifiers
rays
cosmic ray showers
Detectors
Air
high resolution
Telescopes
detectors
Lenses
lenses
telescopes
Photocathodes
Cosmic rays
Photomultipliers
Image sensors
Gamma rays
Phosphors
photocathodes
Fiber optics
Amplification

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Nuclear Energy and Engineering

Cite this

Development of a 16-inch UV-ray image intensifier tube. / Asaoka, Yoichi; Aita, Yuichi; Aoki, Toshifumi; Sasaki, Makoto.

In: IEEE Transactions on Nuclear Science, Vol. 52, No. 5 III, 10.2005, p. 1773-1778.

Research output: Contribution to journalArticle

Asaoka, Yoichi ; Aita, Yuichi ; Aoki, Toshifumi ; Sasaki, Makoto. / Development of a 16-inch UV-ray image intensifier tube. In: IEEE Transactions on Nuclear Science. 2005 ; Vol. 52, No. 5 III. pp. 1773-1778.
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