High-resolution tracking using large capillary bundles filled with liquid scintillator
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- 作者：Annis ; P. ; Bay ; A. ; Benussi ; L. ; Bruski ; N. ; Buontempo ; S. ; Currat ; C. ; D'Ambrosio ; N. ; van Dantzig ; R. ; et. al.
- 关键词：29.40.Gx ; 29.40.Mc ; 42.79.Ls ; 85.60.Gz ; Tracking and position-sensitive detectors ; Scintillation detectors ; Scintillating fibres ; Optoelectronics ; Image intensifiers ; CCD
- 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
- 出版年：2000
- 出版时间：July 11, 2000
- 年：2000
- 卷：449
- 期：1-2
- 页码：60-80
- 全文大小：1011 K
文摘
We have developed large high-resolution tracking detectors based on glass capillaries filled with organic liquid scintillator of high refractive index. These liquid-core scintillating optical fibres act simultaneously as detectors of charged particles and as image guides. Track images projected onto the readout end of a capillary bundle are visualized by an optoelectronic chain consisting of a set of image-intensifier tubes followed by a photosensitive CCD or by an EBCCD camera. Two prototype detectors, each composed of ≈10<sup>6sup> capillaries with 20–25 μm diameter and 0.9–1.8 m length, have been tested, and a spatial resolution of the order of 20–40 μm has been attained. A high scintillation efficiency and a large light-attenuation length, in excess of 3 m, was achieved through special purification of the liquid scintillator. Along the tracks of minimum-ionizing particles, the hit densities obtained were 8 hits/mm at the readout window, and 3 hits/mm at 1 m away. The level of radiation resistance of the prototype detectors is at least an order of magnitude higher than that of other tracking devices of comparable performance.