Time-Resolved Fast-Neutron Imaging With a Pulse-Counting Image Intensifier

Dangendorf, V.; Lauck, R.; Kaufmann, Frank; Barnstedt, J.; Breskin, A.; Jagutzki, O.; Kraemer, Michael A.; Vartsky, D.

doi:10.22323/1.025.0008

Cited by 11 publications

(12 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The active ECII diameter is 40 mm and its quantum efficiency ∼10% at 420 nm. Experimental measurements showed 87 µm spatial resolution [8], which is much better than the scintillator screen pixelization. The Maximal count rate of the ECII is 0.5 MHZ with 10-20 ns dead time between counts and ∼1 ns temporal resolution.…”

Section: Trecor Descriptionmentioning

confidence: 91%

Neutron measurements with Time-Resolved Event-Counting Optical Radiation (TRECOR) detector

et al. 2012

View full text Add to dashboard Cite

TRECOR is designated for a multipurpose integrated system that will detect Special Nuclear Materials (SNM) and explosives in cargo. Explosives are detected by Fast-Neutron Resonance Radiography, and SNM by Dual Discrete-Energy gamma-Radiography. Neutrons and gamma-rays are both produced in the 11 B(d,n+γ) 12 C reaction.The two detection modes can be implemented simultaneously in TRECOR, using two adjacent radiation converters that share a common optical readout. In the present experiment the neutron detection mode was studied, using a plastic scintillator converter.The measurements were performed at the PTB cyclotron, using the 9 Be(d,n) neutron spectrum obtained from a thick Be-target at E d ∼13 MeV. The basic characteristics of this detector were investigated, including the Contrast Transfer Function (CTF), Point Spread Function (PSF) and elemental discrimination capability.

show abstract

Section: Trecor Descriptionmentioning

confidence: 91%

Neutron measurements with Time-Resolved Event-Counting Optical Radiation (TRECOR) detector

et al. 2012

View full text Add to dashboard Cite

show abstract

“…In recent years we have investigated various methods of spectroscopic 2d-imaging in pulsed, broad-energy neutron beam illumination by applying time-of-flight (TOF) methods for energy selection [26][27][28]. Here we present some results with the above-described RS-PMT and read-out electrode, which is used to image the light emission pattern of a scintillating neutron converter screen with high time resolution (few ns) for each detected neutron.…”

Section: Fast-neutron Radiography With Position-and Time-sensitive Phmentioning

confidence: 99%

“…In order to produce the element-sensitive image (c), the coordinates and the TOF of each neutron are stored in a list-mode file. In the off-line analysis, images for defined TOF windows are collected, which correspond to the large structures in the energy-dependent neutron cross section (for details see [28]). After appropriate digital image processing one can produce images like 10c, which only resemble the distribution of a certain chemical element (here: carbon).…”

Section: Fast-neutron Radiography With Position-and Time-sensitive Phmentioning

confidence: 99%

A position- and time-sensitive photon-counting detector with delay- line read-out

Jagutzki¹,

Dangendorf

Lauck

et al. 2007

Optical Sensing Technology and Applications

Self Cite

View full text Add to dashboard Cite

We have developed image intensifier tubes with delay-anode read-out for time-and position-sensitive photon counting. The timing precision is better than 1 ns with 1000x1000 pixels position resolution and up to one megacounts/s processing rate. Large format detectors of 40 and 75 mm active diameter with internal helical-wire delay-line anodes have been produced and specified. A different type of 40 and 25 mm tubes with semi-conducting screen for image charge read-out allow for an economic and robust tube design and for placing the read-out anodes outside the sealed housing. Two types of external delay-line anodes, i.e. pick-up electrodes for the image charge, have been tested. We present tests of the detector and anode performance. Due to the low background this technique is well suited for applications with very low light intensity and especially if a precise time tagging for each photon is required. As an example we present the application of scintillator read-out in time-of-flight (TOF) neutron radiography. Further applications so far are Fluorescence Life-time Microscopy (FLIM) and Astronomy.

show abstract

“…It has been demonstrated that an RS-PMT can be a powerful tool for imaging of photons from scintillators, e.g. generated by nuclear particles or X/γ-rays [7]. An example is the method of Fast Neutron Resonance Radiography (FNRR), utilizing a pulsed beam of fast neutrons with continuous energy spectrum (typically 1-10 MeV) to investigate the composition of bulky objects.…”

Section: Introductionmentioning

confidence: 99%

Time and position sensitive single photon detector for scintillator read-out

Schößler¹,

Bromberger²,

Brandis³

et al. 2012

J. Inst.

View full text Add to dashboard Cite

We have developed a photon counting detector system for combined neutron and γ radiography which can determine position, time and intensity of a secondary photon flash created by a high-energy particle or photon within a scintillator screen. The system is based on a micro-channel plate photomultiplier concept utilizing image charge coupling to a position-and time-sensitive read-out anode placed outside the vacuum tube in air, aided by a standard photomultiplier and very fast pulse-height analyzing electronics. Due to the low dead time of all system components it can cope with the high throughput demands of a proposed combined fast neutron and dual discrete energy γ radiography method (FNDDER). We show tests with different types of delay-line read-out anodes and present a novel pulse-height-to-time converter circuit with its potential to discriminate γ energies for the projected FNDDER devices for an automated cargo container inspection system (ACCIS).

show abstract

Time-Resolved Fast-Neutron Imaging With a Pulse-Counting Image Intensifier

Cited by 11 publications

References 6 publications

Neutron measurements with Time-Resolved Event-Counting Optical Radiation (TRECOR) detector

Neutron measurements with Time-Resolved Event-Counting Optical Radiation (TRECOR) detector

A position- and time-sensitive photon-counting detector with delay- line read-out

Time and position sensitive single photon detector for scintillator read-out

Contact Info

Product

Resources

About