MPGD 2015 Concise Summary Amos Breskin.

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Presentation transcript:

MPGD 2015 Concise Summary Amos Breskin

Grazie SILVIA & her local TEAM ! + all committee members !

“cooking” for us a variety of “TASTY MPGD TOYS” Grazie CHEF RUI ! “cooking” for us a variety of “TASTY MPGD TOYS”

RD51 The prime roles of our community: Study basic detector physics (theory, experiment) Conceive new detector concepts (& readout) Build detector systems for experiments (“the real life”) Educate the younger generation Disseminate new detector technologies Gas-avalanche Detectors: A fascinating, ever-growing field With many multidisciplinary applications Far behind Particle Physics!

OLD GOOD WIRE CHAMBERS - GAIN RESOLUTION CHARPAK 1968 cathode anode wires ATLAS 2015 ~50 years… 1924 – 2010 e- ion 1992 WIRE CHAMBERS Gain ~ 104 Resolution ~ 100mm Timing ~ 10s-100s ns Rate ~ 104 Hz/mm2 Thin-Gap wire Chambers (TGC) being upgraded for sLHC… Status: 50mm resolution

Leading MICRO-PATTERN GAS DETECTORS Oed 1988 Sauli 1997 Giomataris 1998 MICRO-STRIP CHAMBER MSGC GAS ELECTRON MULTIPLIER (GEM) MICROMEGAS DRIFT ELECTRODE Resolution: Few 10s mm ANODE STRIP CATHODE STRIPS <100 mm 140 mm Drift + thin multiplication-strips on insulator MICRO-PIXEL THGEM 2004 Resolution: Few 100s mm

Usual “Problems” Discharge limits (dynamic range)  resistive electrodes Ion backflow blocking (TPC, RICH)  cascades, staggered holes, graphene coatings Photon feedback (noble gases)  cascades, staggered holes Resolutions (physical limits, readout) Rate capability (space charge, charge removal) Large-area detectors (production; industrialization) Readout electronics

Position resolutions needed: 10s microns - to - centimeters! Applications Tracking in HEP TPC Calorimetry (DHCAL) Single-photon (UV, visible) imaging (RICH) Neutron & x-ray imaging Cryogenic T (UV detectors, electron detectors) Nuclear Physics Homeland security etc 50mm Position resolutions needed: 10s microns - to - centimeters!

A 2-THGEM and MicroMegas GPM with position sensitive pad readout 2-THGEM with RPWELL with position sensitive pad readout A triple THGEM GPM with position sensitive pad readout

Summary of summary… Molto-Interesting Conference Good variety of talks, posters & reviews Focused on HEP…though many other fascinating applications! I limited myself to some of the topics presented and discussed others I find important sLHC & (may be) ILC are still far - but B-factories, Nucl.Phys., RHI, SR, neutron sources, space & ground astro-activities, medical etc – are good “customers”! Room for good R&D for training and motivating the younger generation! Amos Breskin – Vienna 2010

BRESSLER

Gaseous Photo-Multipliers (GPMs) for future dark matter searches ERDAL GPMs WIS R&D on GPMs for future multi-ton LXe TPCs for dark matter searches (within DARWIN) Aim for 4π coverage – not practical with PMTs (cost, bulkiness) or SiPMs (dark count rate) Successful demonstration of 4” cryogenic triple-THGEM GPM with reflective CsI coupled to dual phase LXe TPC: (arXiv:1509.02354) - Stable gain ~ 105 Large dynamic range: 1 – O(103) photoelectrons 1 ns timing (~ 200 PEs) Expected PDE ~15% after optimization 4” triple-THGEM GPM Also: on-going R&D on n/γ imaging with pixilated readout (arXiv:1501.00150) CsI coated

Graphene: opaque to ions and transparent to electrons Graphene on GEM

Alexeev JINST2013