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Proposal for R&D on RICH and TPC Detectors for Electron-Ion Collider

This proposal outlines the motivations, activity planning, synergies, and financial requests for the development of RICH and TPC detectors for the FY2017 Call for Proposals for Generic Detector R&D for an Electron-Ion Collider.

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Proposal for R&D on RICH and TPC Detectors for Electron-Ion Collider

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  1. RD_FA : WP - 4 • activity & requests • S. Dalla Torre, S. Dasgupta, S. Levorato, F. Tessarotto • Trieste proposal for the • FY2017 Call for Proposals for Generic Detector R&D for an Electron-Ion Collider

  2. OUTLINE • Motivations • Activity planning • Synergies • Financial requests

  3. RICHes (and TPC) 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 • TPC is the central tracking element in 2 approaches • All this matches our fields of expertise: • RICH detectors • MPGDs (the up-to-date approach to high-rate TPC read-out) Slide shownyesterday

  4. HIGH & LOW p RICHes 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 LOW-p: PID in the range p < 6-8 GeV/c • Liquid C-F radiators: very limited p range • DIRC-derived approaches complex, even if very promising: • Focusing DIRC • TOP • TORCH • Areogel Collider implementation: • Critical procurement • Problematic in 2-radiator RICHes • Large space for intellectual contribution We start from here: next 3 y activity

  5. TPCs The next TPC generation for high rate operation requires ungated TPCs • How? • By Ion BackFlow (IBF) suppression in MPGDs • IBF suppression recipes deteriorate dE/dx resolution … • Parameter tension  appropriate compromise needed • The future will start with the upgrade of ALICE TPC • 2 options • Multiple-layer GEM detectors with different geometries (4 layer & 2 geometries for ALICE upgrade) • GEM pre-amplification + a MICROMEGAS (MM) stage, proposed for ALICE (not selected) • Resistive MICROMEGAS not yet there • In principle superior: intrinsic IBF suppression in MMs Our approach to gaseous PDs In based on THickGEMs and resistive MMs

  6. OUTLINE • Motivations • Activity planning • Synergies • Financial requests

  7. 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

  8. THE STARTING POINT: COMPASS RICH-1 UPGRADE The bulk MICROMEGAS with resistive anode and capacitive coupling R-O Single pad HV is applied here through a resistor (mesh @ ground) 0.15 mm fiberglass Signal read-out from this pad PCB HV 0.5 GW Resistor arrays Connections for groups of 48 pads Signals

  9. OUR RESISTIVE MM – A WINNING APPROACH ! • Global (whole hybrid) IBF rate < 5% • No resistive coating is present inside the detector volume (CsI there) • Stable HV ! • Limited spark rates • No HV drop when a spark occurs • Dead-time control at the level of the most advanced resistive MM approaches (ATLAS SW) PD1 H0 / 10 d HV: MM I: MM 10 d

  10. R&D planning within RD_FA • Planning over 3 years • 4 R&D items illustrated in the following slides

  11. R&D PROGRAM Single pad In the COMPASS RICH-1 photon detectors the pad size is 8 x 8 mm2. A first R&D item is passing to smaller pad size of the order of 3 x 3 or 4 x 4 mm2. HV is applied here through a resistor (mesh @ ground) 0.15 mm fiberglass Signal read-out from this pad PCB SYNERGIC with TPC Resistor arrays Connections for groups of 48 pads Signals RD_FA_workshop, Roma 9-10/11/2016 WP 4 Silvia DALLA TORRE

  12. Preliminary R&D PROGRAM Dilemma: GEMs or THGEMs is a (hybrid) MPGD photon detector for RICHes? • the comparative study of the photoelectron extraction in gas atmosphere is the second R&D item by the LEOPARD RICH specific Efficiency map Photoelectron extraction studies Gain map G.Hamar and D. Varga, NIMA 694(2012)16

  13. Preliminary R&D PROGRAM • the present hybrid photon detectors have an Ion BackFlow (IBF) rate ~ 5% • ultimate figure?  enhancing the control of IBF is a third R&D item • synergic to a possible approach to TPC read-out by hybrid sensors, where MMs can be combined to GEMs • as already proposed and studied using traditional non-resistive MMs SYNERGIC with TPC

  14. Preliminary R&D PROGRAM The performance of the hybrid photon detectors operated in fluorocarbon-rich atmospheres, as it is the case for windowless RICHes, is a forth item. RICH specific C. D. R. Azevedoet al., 2010 JINST 5 P01002

  15. OUTLINE • Motivations • Activity planning • Synergies • Financial requests

  16. SYNERGIES CSN 1 • 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

  17. OUTLINE • Motivations • Activity planning • Synergies • Financial requests

  18. RICHIESTE FINANZIARIE COMMENTI • il programma di lavoro dei prossimi 3 anni e' chiaro e definito • il finanziamento ricevuto con la call USA «R&D EIC» diventa pienamente efficacie se corredato da matchingfoundsINFN

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