ILC Detectors and their R&D GDE meeting Frascati 12/2/2018 F. Richard LAL

Introduction Progress in various technologies and the ILC environment (low radiation doses, duty cycle, no hardware trigger) allows to conceive a quasi perfect and cost effective detector This goal however requires a WW dedicated and coordinated R&D effort to identify priorities and to avoid duplications (the R&D panel) For some important physics goals, improved performances translate into substantial gains in luminosity which amply justify this effort 12/2/2018 F. Richard LAL

ACFA Study

ECFA ILC Meeting in Vienna ZHH 12/2/2018 F. Richard LAL

12/2/2018 F. Richard LAL

Energy reconstruction: PFLOW Method already used at LEP/SLD which needs to be improved Combines tracking + calorimetry Key issues: - geometry (R and L) and magnetic field - tracking efficiency (pattern) - density & granularity for the calorimeters Calorimetry/tracking resolutions are not critical since with ideal PFLOW resolution would be DE/E~20%/√E -> degradation is due to confusion 12/2/2018 F. Richard LAL

Where are we ? Some Caveats: Perfect tracking Z at rest Mark Thomson ECFA meeting in Vienna 35.8±0.3 % Some Caveats: Perfect tracking Z at rest 12/2/2018 F. Richard LAL

HOW DOES PFLOW COMPARES TO STANDARD CALORIMETRY ? complete law EJ= a√EJ ⊕ bEJ + c J.C. Brient Gandia H1 ATLAS ALEPH PFLOW-ILC Ejet ( GeV) Ejet ( GeV) a b c (GeV) ALEPH method QPFLOW 0.59 0.6 ATLAS 0.03 H1 0.5 0.05 PFLOW-ILC 0.3 AND the Angular Dependence !! 12/2/2018 F. Richard LAL * NIM A360 (1994),480

Progress on ECAL Requirements for W-Si Calorimeter Large dynamic range (15 bits) Auto-trigger on MIP Low noise << 1 MIP = 40, 000 e- Hermeticity: no room for electronics ! Electronics ‘inside’ the detector (ADC)  miniaturisation Ultra-low power << mW/ch Readout of more than 30 Million channels W layer Si wafers Elec chip ATLAS LAr FEB 128ch 400*500mm 1 W/ch Physics Proto. 18ch 10*10mm 5mW/ch ILC : 100µW/ch 12/2/2018 F. Richard LAL

Tracking On top of efficiency one needs momentum accuracy to observe inclusively ZH (Z into leptons) This can be obtained with Si or Si+TPC Note that TPC resolution with RO µmegas and GEM is improved / LEP and SLD 12/2/2018 F. Richard LAL

results: resolution vs Z V. Lepeltier Ar/iC4H10:95/05@1T σ(mm) Carleton Ottawa TPC π+ beam E=80V/cm 12/2/2018 F. Richard LAL preliminary

Can we still improve ? There is continuous progress on µelectronics One can conceive much higher granularities using RO technologies used for pixels Examples: ECAL and TPC Are they possible, are they useful ? 12/2/2018 F. Richard LAL

K. Moenig 12/2/2018 F. Richard LAL

InGrid Integrate GEM/Micromegas and pixel sensor Digital TPC J. Timmermans Integrate GEM/Micromegas and pixel sensor ‘GEM’ ‘Micromegas’ By ‘wafer post processing’ Hex / Pillars 4” wafer 19 different fields of 15 mm Ø 2 bonding pads / fields November 16, 2005 Hidden pillars : No dead area

Digital TPC M. Hauschild dE/dx @ 2.5% ??? ...at the ILC... 100 GeV muon, B = 4 T, TESLA-TDR gas, 100 cm drift identical events: same generated primary clusters/electrons Freiburg triple-GEM set-up NIKHEF MicroMegas set-up 12/2/2018 F. Richard LAL

Not discussed (and equally important) µvertex with very challenging issues for the minimum radius of the beam pipe and the occupancy of the 1st layer (MDI issue) Si layers with the hot debate on the actual material The forward region with the crossing angle issues LEP accuracy issues 12/2/2018 F. Richard LAL

The Detector Concept Document In parallel to the R&D activity we need to develop a global view of an ILC detector This is indispensable: - To determine the geometry of a detector based on the physics performances requested - To understand the interface with the machine parameters - To evaluate the cost of an ILC detector This is been done by 3 (+1) international groups will deliver outline documents at LCW06 12/2/2018 F. Richard LAL

The 3 concepts Reasonably diversified approaches GLD LDC SiD 12/2/2018 F. Richard LAL

Some issues after Vienna Improve the software tools to evaluate detector performances -> Few software workshops planned Improve our connection with machine experts (LEP, backgrounds, Xssing angle issues…) MDI panel -> Hope that the ECFA meeting in Oct-Nov 2006 will coincide with a GDE meeting 12/2/2018 F. Richard LAL

Conclusions Very active ongoing effort on detectors and their R&D (>200 people in Vienna) Very substantial effort on R&D ( with still unbalanced financing between regions) Crucial impact of the detector on the overall ILC performance (integrated luminosity figures) We think that connection Detector/Machine is essential 12/2/2018 F. Richard LAL