[Jlab-seminars] Physics Seminar: Maksym Titov; Micro-Pattern Gas Detector Technologies for Physics Projects at the , Energy, Intensity and Cosmic Frontiers

[Stephanie Tysor]

*Physics Seminar*

*Maksym Titov

*

*Centre de Saclay*

***Micro-Pattern Gas Detector Technologies for Physics Projects at the
Energy, Intensity and Cosmic Frontiers***

//

*Abstract:*

Improvements in detector technology often come from capitalizing on 
industrial progress. Advances are made with new insights; industrial 
developments in photo-lithography, microelectronics and printed circuits 
technique have opened the road for the production of micro-structured 
gas amplification devices.  In particular, ease of manufacturing, 
operational stability and superior performances have given rise to two 
major designs: the gas electron-multiplier (GEM) and micro-mesh gaseous 
structure (Micromegas). By using a pitch size of a few hundred 
micrometers, both devices exhibit intrinsic high-rate capability (> 
1MHz/mm2), excellent spatial and double-track resolution (~ 30 ìm and 
500 ìm, respectively), and a time resolution for single photo-electrons 
down to a few-hundred pico-second range. For applications requiring 
imaging detectors with large-area coverage and moderate spatial 
resolution (e.g. ring-imaging Cherenkov (RICH) counters), coarser 
macro-patterned structures (e.g. thick-GEM (THGEM)) offer an interesting 
economic solution. Coupling the microelectronics industry and advanced 
PCB technology has been important for the development of gas detectors 
with increasingly smaller pitch size. An elegant example is the use of a 
CMOS pixel ASIC, assembled directly below the GEM or Micromegas 
amplification structure. Using this approach, Micro-Pattern Gas 
Detectors (MPGD) can reach the level of integration, compactness and 
resolving power typical of solid-state pixel devices.

Science is complex. The use mega-projects at particle accelerators, like 
the LHC, is very important to engage people with science and to receive 
public recognition. During the past five years, there have been major 
developments of Micromegas and GEMs for various upgrades for ATLAS, CMS 
and ALICE experiments at the LHC, as well as THGEMs for the upgrade of 
the COMPASS RICH at CERN. The choice of the MPGD technology fulfills the 
most stringent constraints imposed by future facilities, from the 
Nuclotron-based Ion Collider fAcility (NICA) and Facility for Antiproton 
and Ion Research (FAIR) to the Electron-Ion Collider (EIC), from the 
electron-positron Linear Colliders (ILC/CLIC) to the circular machine 
(Cepc), and proton-proton Future Circular Collider (FCC). MPGDs have 
also found numerous applications in other fields of fundamental and 
applied research at the Energy, Intensity and Cosmic Frontiers. They are 
being used or considered for X-ray imaging and neutron scattering 
science, neutrino-nucleus scattering experiments, dark matter and 
astrophysics experiments, including operation at cryogenic temperatures, 
plasma diagnostics at tokamaks, material sciences, radioactive-waste 
monitoring and security applications, medical physics, portal imaging 
and hadron therapy.

The interest in the technological development and the use of the novel 
MPGD technologies has led to the establishment of the RD51 collaboration 
at CERN in 2008.  Originally created for the five-year term, the RD51 
was prolonged for another five years beyond 2013. Many of the MPGD 
technologies we know today were introduced before RD51 was founded. But 
with more techniques becoming available (or affordable), new detection 
concepts are still being introduced and existing ones are substantially 
improved. This talk will highlight recent MPGD technology advances, 
review RD51 collaboration activities, and address numerous MPGD 
applications at the Energy, Intensity and Cosmic Frontiers.

*Monday, April 25, 2016*

*11:00 am*

*CEBAF Auditorium*

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