(My personal) CALICE Report José Repond Argonne National Laboratory SiD Meeting Eugene, Oregon November 15 – 17, 2010 Go to ”Insert (View) | Header and Footer" to add your organization, sponsor, meeting name here; then, click "Apply to All"

CALICE Collaboration Goals Strategy Development and study of finely segmented calorimeters for PFA applications Strategy Study of physics, proof of technological approach → physics prototypes Development of scalable prototypes → technical prototypes At the last collaboration meeting in Casablanca 4 regions 17 countries 57 institutes 336 physicists

Projects and their Status Calorimeter Technology Detector R&D Physics Prototype Technical Prototype ECALs Silicon - Tungsten Well advanced Exposed to beam% Being assembled MAPS - Tungsten Started Scintillator - Tungsten Exposed to beam HCALs Scintillator - Steel Exposed to beam& RPCs – Steel with 1-bit readout DHCAL Exposed to beam* R&D started RPCs – Steel with 2-bit readout SDHCAL Construction started$ GEMs – Steel Ongoing MicroMegas – Steel TCMT % First imaging calorimeter prototype in the test beam & First calorimeter to use Silicon-Photomultipliers * First calorimeter with embedded front-end electronics/First real digital calorimeter $ SDHCAL group argues that theirs is a technical prototype

A few words about CALICE…. CALICE per se receives no funding CALICE provides guidance, but can not impose decisions CALICE coordinates test beam requests FNAL, DESY, CERN… Many CALICE projects share hardware e.g. Silicon-Tungsten, Scintillator-Tungsten, AHCAL, and TCMT electronic readout Many CALICE projects share DAQ software (frameworks) e.g. Silicon-Tungsten, Scintillator-Tungsten, AHCAL, DHCAL, TCMT; technical prototypes CALICE provides an excellent forum for presentation of results, discussions CALICE coordinates presentations at conferences and fights for visibility All but one PFA-calorimeter project part of CALICE Dual readout calorimetry not part of CALICE (requests were politely denied)

Recent Results: the power of imaging calorimeters Pions in the ECAL Weighted shower radii versus Eπ Comparison with various GEANT4 models Pions in the ECAL Longitudinal shower profile for Eπ= 12 GeV (taken from first hadronic interaction) Comparison with various GEANT4 models Decomposition into contributions from different particle species Distinction of • photons • nuclear fragments • energetic hadrons 2010 JINST 5 P05007

Recent Results: the power of imaging calorimeters Pions in the AHCAL Determination of first hadronic interaction Determination of interaction length for pions Pions in the AHCAL Visible energy as function of depth in calorimeter e.g. A.Kaplan at IEEE

Status: Silicon – Tungsten ECAL → Technological Prototype Mechanical structure Undergoing various tests (heat, mechanical…) SKIROC2 (Front-end chip) Engineering run produced 1650 samples 64 channels per chip Option of power – pulsing implemented FEV8 (Front-end board) Schematic almost complete 1024 channels on a 180 x 180 mm2 board Plans Assembly of 1st short slab 2nd half of 2011 First tests end of 2011 After that test of long detector slab and filling of module

Status: Scintillator/RPC – W → Physics Prototype Currently in PS test beam Absorber structure Octagonal W plates in SS frame 10 mm thick W (corresponding to 2.9 X0) Readout Currently Scintillator AHCAL Tests with RPCs essential Plans Complete structure in January with 10 additional layers Measurements in SPS test beam in July and October 2011

Status: Scintillator – Steel → Technical Prototype Mechanical structure Wedge shaped 3 x 3 cm2 Scintillator tiles with SiPM readout SPIROC (Front-end chip) Engineering run produced ~3300 samples 2 versions: A and B 36 channels/ASIC HUB (Front-end board) Prototype exists 144 channels on a 360 x 360 mm2 board Plans Few HUBs available in 2011 Tests of full slab with cosmics After that small stack tests with DESY e- Also tests in W structure

Status: RPC – DHCAL → Physics and Technical prototype ‘Physics’ prototype in test beam 350,000 readout channels THIS THING WORKS!!! Will be extended to include tail-catcher R&D for next phase Lots of work ahead RPCs: 1-glass; resistive coat; assembly techniques Readout: DCAL IV, front-end board (thinner) Supplies and distribution: HV, LV, gas Simulation: wedge shape, pad size… Plans Extensive test beams January, April, June… Tests with W absorber in fall 2011/early 2012? Work on R&D for next phase

Status: RPC – SDHCAL → Prototype Major differences to DHCAL 3 – bit readout Power – pulsing implemented into front-end Front-end boards with blind vias 1 x 1 m2 RPCs Gas flow Cassette design Construction started Silk screening of resistive paint Plan to assemble 2 RPCs/week HARDROC2 (front-end chips) in hand being tested by robot Plans Complete construction by March 2011 Test beam in July and October 2011

What have I learned so far from CALICE Developing imaging calorimeters is challenging and takes time (not just money) Calibration of large number of channels is tough Reliability is a major issue (not addressed so far) Assembly of prototypes was very tedious (can not be done this way for larger systems) Hadronic showers are weird and not yet well simulated Imaging calorimeters contribute to constrain models and can disentangle components Competition is great …

Test-beam plans for 2011 and 2012 Fermilab FTBF Just completed first DHCAL run GEMs (30 x 100 cm2) In 2011 Fe-DHCAL + RPC-TCMT January 2011 (approved – 4 weeks) Si-W ECAL + Fe-DHCAL + RPC-TCMT April 2011 (approved – 4 weeks) Fe-DHCAL + RPC-TCMT June 2011 (penciled in – 4 weeks) W-DHCAL + RPC-TCMT Fall 2011/early 2012 (not yet requested) Possibly no test beams in 2012 after February CERN Currently in the PS beam: W-AHCAL Just finished testing 30 x 30 cm2 GEM GRPCs (1 m2) (requested 2 weeks) GEMs (1 – 3 30 x 30 cm2) early in 2011 W-AHCAL 1st half of 2011 (requested 4 weeks) Fe-SDHCAL July 2011 (requested 4 weeks) Micromegas (1 m2) July/August 2011 (requested 2 weeks) W-AHCAL October 2011 (requested 4 weeks) Fe-SDHCAL November 2011 (requested 4 weeks) Most likely no test beams in 2012 Total request ~ 44 weeks