1. (My personal) CALICE Report
José Repond
Argonne National Laboratory
SiD Meeting
Eugene, Oregon
November 15 – 17, 2010
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2. 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

3. 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

4. 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)

5. 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

6. 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

7. 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

8. 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

9. 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

10. 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

11. 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

12. 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 …

13. 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