Proposal for PS beam tests of a fast rich detector

A full scale prototype Fast RICH detector with pad readout for unambiguous imaging has been constructed for operation in a high luminosity environment. It uses the best photosensitive gas capable of fast response (TEA) or the intrinsically fast solid photocathode (CsI/TMAE), developed specifically for this purpose. It can be used at e+e- or hadron colliders as well as at fixed target facilities. It has time resolution of 20 ns with a 1.3 microsecond pipeline and parallel readout of 4000 pad sectors. Fast digital VLSI electronics has been developed for readout and 24000 channels have been tested. The prototype device (12000 pad channels) is assembled and ready for beam tests in 1993

Performance of a Pad Hybrid Photon Detector for Ring Imaging

Professionals of health still don't have at their disposal tools for managing the patient record, allowing them to reproduce all the practices they realised with paper medical reports. We focus our attention on one of these practices: annotations. Related to the work of [12], we adopt an original point of view about the documents with their annotations. Our aim is to show the interest of numerical annotations in such an application

An apparatus for the fabrication of large area hybrid photo-diodes

The paper describes a new facility for the fabrication of large area hybrid photodiodes which are intended to be used in the RICH detectors of the LHCb experiment. The facility, which is currently in the commissioning phase, has two main functions: processing of a photocathode in an external process, and subsequent encapsulation of the vacuum tube with a base plate on which the Si detector is pre- mounted. For the best protection of the photocathode and the Si detector a cold In sealing technique is being developed. (13 refs)

A multi-use cathode cell mwpc

Describes a highly flexible modular design for multiwire proportional chambers used in the CERN-NA3 experiment. The authors illustrate this flexibility by describing the transformation of one chamber into a cathode-cell shower detector and giving its performance as such

Performance of a 256-pad hybrid photon detector for ring imaging

We report a detailed experimental investigation of a proximity focused JiIPD with 256 pads of 4 x 4 mm2 for applications on RICH detectors. A signal to noise ratio of 16 is obtained for single photoelectrons with a low noise (ENC I 200 e) front-end electronics and 15.7 kV acceleration voltage. A single photoelectron detection efficiency of 95% is achieved with about 1% bias from electron back scattering

Performance of Si PAD sensors for a RICH detector

In this article a development is described to build a Hybrid Photon Detector using multicell Si pad detectors [I] with readout electronics originally developed for the readout of Si strip detectors. The principle of the readout is to route each pad with a thin metal line on top of a 5 w thick oxide to the periphery of the device, where a bond pad layout identical to that of a strip detector is implemented. This type of sensor is a straightforward solution when pad sizes are required which are either bigger or smaller than naturally covered by pixel detectors, where the one to one correspondence of the size of one electronics channel and the pixel dimensions of the sensor put practical limits to the size of a single cell. It is in general an attractive alternative to pixel detectors in cases where the number of cells are not too big. The application of pad sensors is clearly limited by the maximal number of pixels which can be read out in this way. A practical limit when using 4" sensor technology is about 6000 pads-with an area of each pad less than 1 mm'. Advantages of pad sensors are that there is no constraint on the readout electronics in terms of layout space and that a simple and robust connection technology with wire bonding exists. Disadvantages are increased capacitance from routing lines leading to higher noise and the limitations in number of cells for single devices