1. the CALICE test beam set-up and running experience
Erika Garutti (DESY)

2. The CALICE mission Final goal:
CAlorimeter for the LInear Collider Experiment
Imaging
calorimeter
Final goal:
A high granularity calorimeter optimised for the Particle Flow measurement of multi-jets final state at the International Linear Collider
Scint. Strips-Fe TCMT
Intermediate task:
Build prototype calorimeters to
Establish the technology
Collect hadronic showers data with unprecedented granularity to
- tune clustering algorithms
- validate existing MC models
Si-W ECAL
Scint. Tiles-Fe AHCAL
E. Garutti
ECFA workshop - Valencia Oct 2006

3. ECFA workshop - Valencia - 7-11 Oct 2006
Not to scale
moves to CERN
Si-W ECAL
30 cm
H6b test beam area in Prevessin
Scint. Tiles-Fe AHCAL
“…end of June ’06 the CALICE collaboration is packing up 3 calorimeter prototypes from DESY (D) and NIU (US). Destination: Geneva.
Expected duration of the mission: 4 months. ”
Scint. Strips-Fe TCMT
110 cm
E. Garutti
ECFA workshop - Valencia Oct 2006

4. Running time granted / given
Some numbers:
total data taking time = 36 days granted / 21 days given
people on shift ~50 (from all institutes in CALICE)
beam duty cycle (during running time) ~ 60%
detector up time > 90% (including ECAL + AHCAL + TCMC + DAQ) m +
One major de-installation during ATLAS run in H6C
2 periods with different detector installation:
Aug.-Sep. – technical installation
Oct – installation for physics m
We are here m
E. Garutti
ECFA workshop - Valencia Oct 2006

5. The Detectors Installed
The Si-W ECAL:
30 layers of W with variable thickness (~1l)
only “upper” two wafer rows equipped
The A-HCAL, Scintil. Tiles+SiPM r/o:
(15) 23 active layers ~4 l (out of 38 planned)
~5000 channels
Aug. installation : coarse segmentation
Slabs with 6 Si wafers
with 6x6 pads each
Oct. installation : fine segmentation
2 cm steel plates
~6500 channels
see G. Geyken talk
The Tail Catcher (TCMT),
Scintil. Strips+SiPM r/o:
fully equipped with 16 layers ~5.5 l
SiPM
= 320 channels
2 / 10 cm steel plates
see B. Lutz talk
E. Garutti
ECFA workshop - Valencia Oct 2006

6. The physics installation
ECAL
Tail Catcher
HCAL
Compact installation aimed to tuning of clustering and MC comparison:
<10cm between calorimeters, minimum dead material
E. Garutti
ECFA workshop - Valencia Oct 2006

7. Installation challenges
Commissioning of part of the detectors during CERN test beam
Commissioning of AHCAL LED monitoring system (see I. Polak talk)
First integration of ECAL+HCAL and TCMC
Installation geometry optimized on the spot
Installation of fast networking / high speed data transfer
1 Gbit switch to CERN, 20Mbyte/s to DESY (see R. Poeshl talk)
The noise “fight”
ECAL noisy slabs (see A.-M. Megan talk)
Modification of HCAL/TCMT VFE electronics (see S. Schaetzel talk)
Integration of beam instrumentation
E. Garutti
ECFA workshop - Valencia Oct 2006

8. ECFA workshop - Valencia - 7-11 Oct 2006
The SPS H6 Beam Line
Primary beam: p 450 GeV on Be targ. (T4)  secondary beam: e,m,p,p , GeV
Beam intensity: up to 108 particles / spill, we used 1-3kHz beam rate
Secondary beam pion: no sec. target, Pb absorber to filter electrons
Tertiary beamelectron: 3 mm Pb target, no absorber (lower intensity)
 responsibility of the users to tune correctly 500m of beam optics and optimize secondary or tertiary beam operation
CALICE installation
SPS H6 beam line
horizontal plane
Absorber
sec.target
vertical plane
E. Garutti
ECFA workshop - Valencia Oct 2006

9. The CERN setup …much more than “just” 3 calorimeters
3x3
10x10
m trigger
beam
500 m
Steps towards a clean physics data sample:
1) Optimize beam  tune magnets, collimators, secondary trg, abs
2) Separate e/p  Cherenkov detector (for Ebeam < 40 GeV)
3) Itentify beam impact point on ECAL  3 x/y pairs of MWPC with double readout
4) Tag multi-particle events  amplitude r/o of 1cm thick scint. counter (veto)
5) trigger physics with high efficiency  trigger system
 Store event by event info from 2) 3) 4) 5) in the common DAQ
* all in mm
E. Garutti
ECFA workshop - Valencia Oct 2006

10. The data taken (1st period)
Courtesy of G. Mavromanolakis
parasitic muon calibration:
- before and after main data taking periods
high intensity max rate, 130Hz)
wide distribution (1x1 m2 covered uniformly)
high statistics (> 50 M events)
AHCAL and TCMT calibrated at various operation voltages
E. Garutti
ECFA workshop - Valencia Oct 2006

11. The data taken (1st period)
e GeV 10 deg
p GeV 0 deg
ECAL em program
- Tertiary e GeV, from 50 GeV beam
- ECAL rotation: 0,10,20,30 deg
small samples of p GeV
too large distance ECAL-AHCAL (technical run!!)
Courtesy of G. Geyken
E. Garutti
ECFA workshop - Valencia Oct 2006

12. The data taken (1st period)
Total amplitude in HCAL
EM program in HCAL:
establish calibration
and corrections for understood phys.
processes and using established MC
e GeV
Courtesy of M. Groll
AHCAL stand alone, ECAL removed
GeV secondary beam
tested p / e 6,10,15,20 GeV
GeV secondary beam
e GeV and p GeV
 uncorrected
linearity curve
E. Garutti
ECFA workshop - Valencia Oct 2006

13. The energy grid (2nd period)
In addition: 42 M ev muons for calibration
14 M ev calibration (pedestal, SiPM gain, SiPM saturation scans …)
For a total of > 5 Tbyte data on the DESY dCache / GRID ready to be analyzed
E. Garutti
ECFA workshop - Valencia Oct 2006

14. ECFA workshop - Valencia - 7-11 Oct 2006
Impressive data rate
Shower from a 40 GeV p+
Courtesy of R. Pöschl
The physics is there 
Now starts the fun !!
E. Garutti
ECFA workshop - Valencia Oct 2006

15. Courtesy of G. Mavromanolakis
The tools for data taking
the online monitor
Real time display
of data and detector quality
essential during beam tuning
high performance as tool for the shift crew
Beam profile in x coordinates from 3 MWPC
Total energy deposited in ECAL GeV pion beam
Cherenkov ON = electron tag
Cherenkov OFF = hadron tag
Correlation ECAL/HCAL energy
20 GeV p+ / p-
10 GeV p+ / p-
ONLINE PLOT
Uncorrected
No PID selection
E. Garutti
ECFA workshop - Valencia Oct 2006
Courtesy of G. Mavromanolakis

16. The tools for data taking
the slow control
AHCAL slow control :
control SiPM voltages and LED monitoring system
r/o relevant monitor par.
collect beam parameters
send all to the DAQ
Used as a test bench for the project of
Global Accelerator Network
Multipurpose Virtual Laboratory
E. Garutti
ECFA workshop - Valencia Oct 2006

17. Encountered “problems”
Beam / trigger quality
During 1st run period:
too many multi-particle events
~ 5-10% level
can (mostly) be removed offline
More time invested in beam tuning understanding and optimization
Improved beam quality in
the 2nd run period
e- 20 GeV
E. Garutti
ECFA workshop - Valencia Oct 2006
Courtesy of V. Morgunov

18. Encountered “problems”
Temperature gradient in AHCAL
During 1st run period max temperature gradient (day/night) 2 oC
uniform temperature within the detector layers
2nd run period: more AHCAL layers
compact electronics, with less air flow
few days after 2nd installation 8 oC
longitudinal temperature gradient
SiPM amplitude changes as dA/dT = -5%/oK
installed cooling fans near VFE electronics
temperature stabilized within 2 oC
still day/night fluctuations, but manageable
E. Garutti
ECFA workshop - Valencia Oct 2006

19. ECFA workshop - Valencia - 7-11 Oct 2006
Conclusion MC
REALITY
DATA
A calorimeter CONCEPT for the ILC is gaining FORM and CONTENT !!!
E. Garutti
ECFA workshop - Valencia Oct 2006

20. Outlook / Plan for next run
Next installation with:
fully commissioned detectors
- 38 layers AHCAL
- all bottom slabs in ECAL
movable stage for AHCAL 
hadronic showers from 0o to 30o
Also wanted:
Pion / proton separation
Low energy hadrons (< 6 GeV ?)
The analysis of the data taken will tell us if we “missed” something
Very good connection established with the CERN team
Proposal submitted for May 2007 for another CERN test period
… FermiLab is next at the end of summer 2007
E. Garutti
ECFA workshop - Valencia Oct 2006