Speaker
Prof.
Vladimir Peskov
(CERN and UNAM, Mexico)
Description
Nowadays, micropattern gaseous detectors (MPDGs) challenge traditional gaseous detectors (such as MWPCs, RPCs and parallel-plate avalanche chambers) in practically all the applications. The main advantage of the MPGDS is that they are manufactured by means of a microelectronics technology, which offers a high granularity and, consequently an excellent position resolution. However, the fine structure of their electrodes and the small gap between them make MPGDs electrically “weak” In fact, their maximum achievable gains are usually not very high and they can be easily destroyed by sparks, which may occur during their operation.
A few years ago, we have developed the first GEM-type micropattern detectors featuring resistive electrodes instead of metallic ones. The resistive electrodes limit the current during the sparks and make the detector spark-protected. This work triggered a sequence of similar developments, which are nowadays performed not only by our group, but by several other groups. We will review the latest achievements in this direction, for example the successful development and tests of large-area MICROMEGAS with resistive electrodes will be described. Finally we will present a new family of spark-protected MPGDS recently developed by us: the resistive microstrip and microdot detectors and the resistive WELL/CAT- type detectors. These innovative detectors are produce on standard PCB boards by a simple technology. We will present the results of exhaustive studies performed on these detectors: their rate and gain characteristics, position and energy resolutions, stability with time and so on . As follows from our tests, these detector are very promising and thus may have a great future.
Preferred medium (Oral/poster)
Oral
Author
Prof.
Vladimir Peskov
(CERN and UNAM, Mexico)
Co-authors
Prof.
Eugenio Nappi
(INFN, Bari, Italy)
Dr
Francesco Pietropaolo
(INFN, Padova)
Dr
Paolo Martinengo
(CERN)
Prof.
Pio Picchi
(INFN, Frascati)
Mr
Rui Oliveira
(CERN)
