Fiber Tracking Detector Research Articles

The PERDaix detector

The PERDaix (Proton Electron Radiation Detector Aix-la-Chapelle) detector is designed to measure charged particles in cosmic rays. It can distinguish particle species up to 5GV rigidity. PERDaix was flown on the BEXUS-11 balloon on 23rd November 2010.The detector has the dimensions of 246×400×859mm3, a geometrical acceptance of 32cm2sr, a low weight of 40kg and a low power consumption of 60W. The spectrometer consists of a time-of-flight system, a scintillating fiber tracking detector, a permanent magnet and a transition radiation detector. Silicon photomultipliers are used as photodetectors in the time-of-flight and the tracker system.

Quasi-elastic events and nuclear effects with the K2K Sci-Fi detector

The near detector complex of the K2K long-baseline neutrino experiment contains a scintillating fiber tracking detector. It is capable of detecting not only the muon but also the outgoing proton in neutrino-nucleon scattering. This allows for the enhancement of quasi-elastic interactions in the data sample. However, a proper modeling of the nuclear re-interactions of the proton is necessary to achieve reliable results.

A scintillating plastic fiber tracking detector for neutron and proton imaging and spectroscopy

We report on a prototype detector system designed to perform imaging and spectroscopy on 20–250 MeV neutrons. The detection techniques employed can be applied to measurements in a variety of disciplines including solar and atmospheric physics, radiation therapy and nuclear materials monitoring. The detector measures the energy and direction of neutrons by detecting double neutron–proton scatters and recording images of the ionization tracks of the recoil protons in a densely packed bundle of scintillating plastic fibers stacked in orthogonal layers. The scintillation tracks are detected and imaged by photomultipliers and image intensifier/CCD camera optics. By tracking the recoil protons from individual neutrons, the kinematics of the scatter are determined. This directional information results in a high signal-to-noise measurement. The self-triggering and track imaging features of a prototype for tracking in two dimensions are demonstrated in calibrations with 14–65 MeV neutrons, 20–67.5 MeV protons, and with cosmic-ray muons. Preliminary results of phantom imaging measurements using a proton beam are also presented. We discuss several applications for this detector technique and outline future development work.

The E835 scintillating fiber tracking detector

This paper describes the scintillating fiber tracking detector designed and built for the Fermilab experiment E835. This detector uses Visible Light Photon Counters (VLPC) readout system and is in use at the p ¯ accumulator ring at Fermilab. A description of the components of the detector and preliminary results of its performances are given.

The UA4/2 experiment at the CERN S [formula omitted]pS collider

The UA4/2 experiment performed at CERN to measure the ratio of the real to the imaginary part of the forward elastic scattering amplitude is described. The accent is placed on the improvements with respect to the previous UA4 experiment, especially on the much improved design of the high-β insertion and a high-resolution, highly multiplexed scintillating fiber tracking detector.

Effects of hadron irradiation on scintillating fibers

Trackers based on scintillating-fiber technology are being considered by the Solenoidal Detector Collaboration at SSC and the DO collaboration at Fermilab. Some 600 fibers in the Fermilab Tevatron CO area were irradiated, thereby obtaining a hadronic irradiation at realistic rates. Four-meter-long samples of ten Bicron polystyrene-based fibre types, maintained in air, dry nitrogen, argon, and vacuum atmospheres within stainless-steel tubes, were irradiated for seven weeks at various distances from the accelerator beam pipes. Maximum doses, measured by thermoluminescence detectors, were about 80 krad. Fiber properties, particularly light yield and attenuation length, were measured over a one-year period. A description of the work together with the results is presented. At the doses achieved, corresponding to a few years of actual fiber-tracking detector operation, little degradation was observed. Recovery after several days' exposure to air was noted. Properties of unirradiated samples kept in darkness show no changes after one year. >

A high resolution, highly multiplexed scintillating fiber tracking detector

A high resolution, highly multiplexed scintillating fiber tracking detector has been designed for the UA4-2 experiment. Ten detectors have been built and are being tested. A preliminary analysis shows that the resolution is better than 100 μm and the efficiency close to 99.6%.

The design and construction of a scintillating fiber tracking detector

The central detector of the upgraded UA2 experiment at CERN includes a cylindrical tracking and electromagnetic preshower detector which employs 1 mm diameter scintillating fibers as the sensitive medium. The device is two meters long and extends from 38 to 44 cm in its radial dimension. Sixty thousand fibers are arranged in 24 cylindrical layers, the outer six preceded by 1.5 radiation lengths of lead, permitting the localized detection of electromagnetic showers. This design was made possible by the development of plastic scintillating fibers with attenuation lengths of over 1.5 m and with a light yield sufficient to assure a detection efficiency greater than 90% for minimum ionizing particles traversing the fiber at any point along its 2 m length. In this article we describe the fabrication and performance of the fibers, the assembly procedure used in the construction of the detector, and the degree of uniformity achieved.