RD_FA : WP - 4 C. Chatterjee1, S. Dalla Torre, S. Dasgupta2, S. Levorato, F. Tessarotto, A. Valentini1 1 – new 2 – formally he cannot be list in 2018 (AIDA2020 postdoc) RD_FA meeting, bologna 3-4/7/2017 RD_FA WP 4 Silvia DALLA TORRE

OUTLINE Reminding the context Activity: period 1/1-30/6/2017 Activity planning: period 1/7/2017-31/12/2018 Financial requests, preliminary RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE

RICHes (and TPC) for EIC The setup designs are still subject to important evolution, nevertheless About 2 crucial elements related to our direct interests RICHes (high & low momenta) are necessary: Our main focus TPC is the central tracking element Synergies with studies for RICH applications (IBF, miniaturized pads) All this matches our fields of expertise: RICH detectors MPGDs (the up-to-date approach to high-rate TPC read-out) RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE

HIGH p RICHes Starting point of our R&D activity for EIC HIGH-p: PID in the range 6 < p < 60 GeV/c Radiator: gas is mandatory Collider implementation: short (~ 1 m) radiator length Two possible ways, both requiring deeper exploration High pressure, studied for ALICE upgrade VHMPID Towards the very far UV with window-less approach (prototype tested at Fermilab) In both approaches gaseous photon detectors have been used Starting point of our R&D activity for EIC RD_FA meeting, bologna 3-4/7/2017 WP-4 Silvia DALLA TORRE

SYNERGIES CSN 1 CSN 5 Non-INFN founds The starting point is the development for COMPASS RICH upgrade Construction completed, commissioning on-going Cultural synergies with the RD51 networking activities CSN 5 MPGD_NEXT, in particular task 4 – High-gain hybrid MPGD jobs: development of THGEM technologies towards large gains Non-INFN founds AIDA2020, WP13 – Innovative gas detectors, task 13.2.5 Overlap with MPGD_NEXT, task 4 EIC R&D (within the ED6 Consortium) Overlap with RD_FA, WP4 RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE

OUTLINE Reminding the context Activity: period 1/1-30/6/2017 Activity planning: period 1/7/2017-31/12/2018 Financial requests, preliminary RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE

R&D planning within RD_FA Planning over 3 years 4 R&D items illustrated in the following slides REMINDER (presented last year) RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE

THE STARTING POINT: COMPASS RICH-1 UPGRADE The detector architecture each 600 x 600 mm2 detector consists of two modules having 600 x 300 mm2 RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE

THE STARTING POINT: COMPASS RICH-1 UPGRADE The bulk MICROMEGAS with resistive anode and capacitive coupling R-O PCB 0.15 mm fiberglass Single pad HV is applied here through a resistor (mesh @ ground) Signal read-out from this pad HV 0.5 GW Resistor arrays Connections for groups of 48 pads Signals RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE

TOWARDS MINIATURIZED PAD_SIZE development of resistive MM by discrete elements with miniaturized pad-size pad-size: 8 x 8 mm2  3 x 3 mm2 (3.5 mm pitch) prototype active area: 10 x 10 cm2 easy expandability of the active surface: all the detector services (read-out FE cards, resistor boards) included in the active surface Modular design based on groups of 128 pads (16 x 8) Connector selected: SAMTEC, FTE series RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE

TOWARDS MINIATURIZED PAD_SIZE The design of the prototype of the resistive MM by discrete elements with miniaturized pad-size RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE

TOWARDS MINIATURIZED PAD_SIZE In parallel, prepare for the prototype read-out: By the SRS (Scalable Read-out System), FE: APV25 Development of the DAQ software and test with an existing prototype Stage: M. Baruzzo RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE

OUTLINE Reminding the context Activity: period 1/1-30/6/2017 Activity planning: period 1/7/2017-31/12/2018 Financial requests, preliminary RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE

ACTIVITY PLANNING 2017: complete the design and build the MM prototype with miniaturized pad-size, as foreseen 2018: Complete the prototype construction and its characterization, as foreseen Start a new strategic activity and, therefore, postpone starting the other R&D items on going New activity RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE

NEW STRATEGIC ACTIVITY 47 % (!) CsI, the only standard photoconverter compatible with gaseous atmospheres, has problematic issues, main ones: It does not tolerate exposure to air (water vapour, O2) Ageing by ion bombardment NEW !!! (see Antonio Valentini’s talk) Photocatodes: diamon film obtained with Spray Technique making use of NC powder Spray technique: T ~ 120° (instead of ~800° as in standard techniques) L.Velardi, A.Valentini, G.Cicala, Diamond & Related Materials 76 (2017) 1 For next year, we are planning a very basic set of studies: to compare the QE of photocathode samples in vacuum and in different gaseous atmospheres; to realize a photon detector prototype with a photocathode using as substrate a THGEM and to characterize it; to perform a preliminary ageing study measuring the QE before and after collecting defined amount of charge at the photocathode itself. 15 RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE

OUTLINE Reminding the context Activity: period 1/1-30/6/2017 Activity planning: period 1/7/2017-31/12/2018 Financial requests, preliminary RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE

RICHIESTE FINANZIARIE Necessita’ di missioni ~ 10 k€ Material procurement Viaggi in USA Riunioni in Italia Necessita’ di consumi ~ 20 k € THGEMs to be used as ND photocathode substrates Cell (mechanics, connectors, gas connections, mechanical frames) to test the sample photocathode comparing measurements in vacuum and in gaseous atmospheres ND powder samples Preparation and analysis of metallographic specimens to study the ND distribution in the holes of the THGEM substrate Material transportation BARI-TRIESTE Gas bottles to operate the detectors Miscellanea of small items PRELIMINARY !!! RD_FA meeting, bologna 3-4/7/2017 WP 4 Silvia DALLA TORRE