Description
Poster Session 4 - Synchrotron Detectors and Pixel Detectors
Dr
Alessandro Gabrielli
(Dipartimento di Fisica Università di Bologna)
05/09/2008, 10:40
Pixel Detectors for Charged Particles
Poster
A prototype of a mixed-mode ASIC built up of a fast readout architecture that interfaces with a matrix of 4096 Monolithic Active Pixel Sensor (MAPS), via STM 130nm CMOS technology, was fabricated. Square groups of 16 pixels form a macro-pixel (MP). Each MP can be latched via single pixels (50 by 50 micron) and a time-stamp is associated with the frozen condition. The readout architecture is...
Mr
Dzmitry Maneuski
05/09/2008, 10:40
Pixel Detectors for Charged Particles
Poster
Monolithic active pixel sensor technology is a relatively inexpensive and reliable alternative to that of CCDs. Potential scientific applications of these devices include charged particle detection, indirect X-ray imaging and indirect neutron detection. This paper will report on the characterisation of three different sensor variants from the HEPAPS4 family. The sensors have identical 3MOS...
Dr
Celeste Fleta
(University of Glasgow)
05/09/2008, 10:40
Pixel Detectors for Charged Particles
Poster
3D detectors are photodiode detectors with n- and p-type electrode columns passing through a silicon substrate. Using this structure, the spacing between electrodes can be made much smaller than the substrate thickness, greatly reducing the collection time and operating voltage of the sensor. The structure should also reduce charge sharing between adjacent pixels, improving the image quality....
Mr
Troy Unruh
05/09/2008, 10:40
Detectors for Synchrotron Radiation and Spallation Neutron Sources
Poster
Silicon based diodes coated with a thin film of neutron reactive materials have been shown to produce excellent low efficiency neutron detectors. This work employs the same technology, but groups 25 equally sized and spaced diodes on a single 29 mm by 29 mm chip. The 5x5 chips have been fabricated and coated with a thin film of 6LiF for use as a low efficiency neutron beam monitor. The 5x5...
Dr
Anton Tremsin
05/09/2008, 10:40
Detectors for Synchrotron Radiation and Spallation Neutron Sources
Poster
Neutron counting detectors with boron or gadolinium doped microchannel plates (MCPs) proved to have very high detection efficiency, spatial and temporal resolution and have very low readout noise. In this paper we present the results of both theoretical predictions and experimental evaluations of detection efficiency and spatial resolution measured at cold and thermal neutron beamlines. The...
Dr
Marlon Barbero
(Physikalisches Institute, Universitaet Bonn)
05/09/2008, 10:40
Pixel Detectors for Charged Particles
Poster
A new pixel Front-End (FE) IC is being developed in a 130nm technology for use in the upgraded Atlas pixel detector. The new pixel FE will be made of smaller pixels (50x250/200um vs. 50x400um for the present FE, FE-I3), a much improved active area over inactive area ratio, and a new analog pixel chain tuned for low power and new detector input capacitance. The higher luminosity for which this...
Dr
Thalis Anaxagoras
05/09/2008, 10:40
Pixel Detectors for Charged Particles
Poster
We present a parametric CMOS Active Pixel Pixel for the evaluation of noise reduction architectures. The sensor is called e-Le-NA, which stands for Low Noise Active pixel sensor. It consists of fourteen different arrays for characterising and investigating method to reduce the noise in an image sensor. In a MAPS, the dominant source of noise is the reset noise. A conventional technique is to...
Mr
Evan Curwood
05/09/2008, 10:40
Detectors for Synchrotron Radiation and Spallation Neutron Sources
Poster
The emerging interest in coherent x-ray diffractive imaging (CXDI) is placing particular demands on position sensitive x-ray detectors. The technique typically requires a high efficiency, highly pixellated detector with a large dynamic range. CXDI is a good example of where hybrid pixel detectors will be a very competitive technology. The detector development group at the Monash Centre for...
Sung-Woo Kwak
(KINAC)
05/09/2008, 10:40
Detectors for Synchrotron Radiation and Spallation Neutron Sources
Poster
In these days, the threats relating to nuclear and radioactive materials have become a matter of internationally increased grave concern. The mobile radiation detection system has employed a NaI-based radiation detector to monitor in-transit nuclear material. In the design of a radiation detector for prevention of illicit trafficking of nuclear and radioactive materials, the trade-off should...
Mr
Ralf Engels
05/09/2008, 10:40
Detectors for Synchrotron Radiation and Spallation Neutron Sources
Poster
The detector group of the Central Institute of Electronics at the Forschungszentrum Jülich GmbH was founded in 1968. First developments aimed at a detector system with a position sensitive BF3 proportional counter for small angle neutron scattering, which was later used at a beamline of the research reactor FRJ2. At the end of the 70's first measurements were carried out with photomultiplier...
Dr
Masaki Hori
05/09/2008, 10:40
Detectors for Synchrotron Radiation and Spallation Neutron Sources
Poster
Several types of profile monitors used to measure the spatial and temporal profiles of pulsed antiproton beams at the Antiproton Decelerator (AD) facility of CERN is described. These include a highly sensitive, secondary electron emission chamber, a parallel plate ionization chamber, and a Lucite Cherenkov counter. These monitors were recently used in laser spectroscopy experiments of...
Dr
Giullio villani
(Rutherford Appleton Laboratory)
05/09/2008, 10:40
Pixel Detectors for Charged Particles
Poster
An innovative circuit topology for solid-state pixel detectors based on latch up effect is described. This effect, normally considered detrimental in CMOS devices when triggered by SEU or external radiation, is exploited in solid state electronic switches (e.g. thyristor and SCRs). Here it is proposed to use this effect as part of a building block for low power, low noise, fast and much...
Dr
Dave Langstaff
(University of Wales, Aberystwyth)
05/09/2008, 10:40
Pixel Detectors for Charged Particles
Poster
In detectors utilising microchannel plates as an amplification stage, there is a degree of charge cloud spreading within the microchannel plate stack and also between the microchannel plate stack and the readout device. This charge cloud spreading results multiple triggering within event counting detectors, leading to degradation of spatial resolution and statistical noise on the resultant...
Tatsuya Nakamura
(Japan Atomic Energy Agency)
05/09/2008, 10:40
Detectors for Synchrotron Radiation and Spallation Neutron Sources
Poster
An effective pixel size of a two-dimensional wavelength shifting fibre (WLSF) neutron image detector was improved from 0.5 mm down to 0.17 mm with implementing a fibre optic taper (FOT). The main part of the prototype detector consisted with a thin ZnS/6LiF screen, the FOT, and the crossed WLSF ribbons for x and y coordinate. The WLSF image detector had 16 x 16 fibre channels and the light...
