Task 14.2.2
TEST BENCHES FOR THE CHARACTERISATION OF
HIGHLY GRANULAR CALORIMETER ELEMENTS
WITH SCINTILLATOR AND SIPM READOUT
Lucia Masetti
Johannes Gutenberg University Mainz
PRISMA Cluster of Excellence
AIDA2020 WP 14
Face-to-face meeting - 27/01/16
Goals and deadlines
•Goals:
•Precision test of single cells with a radioactive source (Munich)
•Mass tests of photon sensors (Heidelberg, as partner of DESY)
•Large area tests with cosmic ray muons (Mainz)
•Temperature stabilisation of bias voltage (Prague, Bergen)
•Milestone:
•MS14.2: M12 (04/2016) - Specification of setup
•Deliverable:
•D14.2: M40 (08/2018) - Report on commissioning and usage of
setup
L. Masetti - 27/01/16
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AIDA WP14 Face-to-face meeting
Information exchange
• Calice meetings:
• All participating Institutes are members of the CALICE AHCAL
collaboration
• Status reports by most groups at the general CALICE meeting in
Munich in September and AHCAL meeting at DESY in December
• Dedicated meeting:
• Discussion on specifications on September 30th (agenda)
• Linear Collider Workshop:
• Presentation by Gerald Eigen on SiPM gain studies at LCWS (slides)
L. Masetti - 27/01/16
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AIDA WP14 Face-to-face meeting
25
20
20
15
15
10
10
5
5
Mean Ede
M / Scintillator Tile Studies
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attached to a three-axis positioning stage. The geometry of the source and the trigger
detector board holders is designed such that the electron beam always aims in the middle
of the trigger. The trigger detector is a 5 ⇥ 5 ⇥ 5 mm3 large scintillator cube made of the
same material as the T3B tiles and it is read out by a Hamamatsu MPPC-25P [66]. Two
horizontal axes of the stage are controlled by a computer. Their range is 50 mm with a
positioning precision of 50 100 µm. The third axis with a range of 25 mm is operated
just manually with the help of an electronic controller. It is used for adjusting the distance
between the tile under test and the trigger detector.
Munich: specifications (I)
0
able to scan different sizes/shapes options for readout, it should offer um of 3 readout channels)
0
5
10
15
20
25
30
X [mm]
0
Voltmeter
Temperature sensor
PC
Scintillator tile
Sr
90
Positioning
stage
ber (range -35 - +100 degrees, -> already available at MPP
Oscilloscope
Power supply
Coincidence cube
Readout boards
Dark box
Figure 5.5.: Schematic of the tile scan experimental setup. Coincidence detector and the
radioactive source are carried on a XYZ-stage while the tested scintillator is
fixed. Both detectors are read out by an oscilloscope.
The SiPM/Scintillator
scanner
be ordered,
able to
to•3.5
MeV) -> source
hasshould
been
expected delivery
In between the radioactive source and the trigger detector is placed the tested tile which
is attached to its own readout board. Its position can be adjusted such that the stage can
cover the full area of the tile in a 2D scan. In a crosstalk measurement, two readout boards
with two tiles are placed under the source such that their joint border lies in the middle of
the range of the stage. Then, we can perform a symmetrical scan. A schematic drawing of
the source path is show in figure 5.6.
All employed readout boards need their power supply lines for the amplifier and the
SiPM. Their output signals were all read out by one PicoScope. Every SiPM is powered
with an independent power supply to be able to adjust the SiPM gains separately. The
stage as well as the oscilloscope communicated with the PC via a USB port. All the scintillators with their preamplifier boards, the 90 Sr source and the micro-positioning stage were
enclosed in a light tight dark box to avoid any influence of outer illumination.
For temperature monitoring in the dark box, we used a resistance thermometer Pt1000.
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AIDA WP14 Face-to-face meeting
This sensor was read out by a dedicated voltmeter and the temperatures were acquired every 30 s by the PC via GPIB interface during the measurement. We used the Pt1000 during
• scan different sizes/shapes of scintillator tiles
• offer several SiPM options for readout
m, typical scan step size 0.5 mm) -> 15 cm selected, sufficient
• offer inter-tile crosstalk measurement (a minimum of 3 readout channels)
ies -> to be ordered
L. Masetti
- 27/01/16
PM) underneath
coupled
to the same stage
Munich: specifications (II)
• Climate chamber (range -35 — +100 degrees, work space dimension 56x55x63 cm3) →
already available at MPP
• Ru-106 source (37 MBq, electrons up to 3.5 MeV) → now available at MPP (NEW!!)
• x-y-z stage (typical scan step size 0.5 mm), 15 cm range sufficient for CALICE HCAL
crosstalk studies → to be ordered
• Trigger cube (scintillator + low noise SiPM) underneath coupled to the same stage as
the source
• Temperature measurement for monitoring
• Readout of up to 3 channels with Picoscoop → study alternative readout with more
channels
• Same Vbias for all signal SiPMs
• LabView steered program that combines readout and analysis → development ongoing
• Redesigned pre-amp boards for small and large SMD type MPPCs → design ongoing
• Momentum selection → study feasibility
L. Masetti - 27/01/16
5
AIDA WP14 Face-to-face meeting
Heidelberg: tasks
• Identified and prioritised tasks to be performed for
large scale production
LTT for SM
Original Setup
• Test SMD SiPMs after soldering to board, before
gluing of tiles on top
• Test of SMD SiPMs-only before soldering (assume
mounting on reels for production)
• Test of large number of tiles-only
SMD SiPM Setup (as planned)
• Test of fully equipped boards → already available
• Starting with characterisation of SMD SiPMs alone
• Can be used also for mu3e tile detector
characterisation
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10.12.2015
AIDA WP14 Face-to-face meeting
AHCAL Main
Heidelberg:
status
Mass Characterization set-ups
for SMD HBUs
Allow characterization of Tiles / SiPMs in SMD configuration
• Connection options
1mm²
SiPM
→ Characterization of SiPMs & Tiles individual
• Direct placement PCB, spring contacts, elastomer contacts
• First option tested
& working
Start with SMD SiPM characterization
→ Several
connection options
considered
• Only moving part
in system:
Fibers
• Current status:
Direct placement PCB, Spring contacts, elastomer contacts
SiPM
interconnect
& mask
readout
ASIC
PCB
first option tested & Working (reliability needs to be checked)
Only moving
in system:
• Fiber system updated
for part
new
SiPM Fibers
configuration
→ Ready to be integrated in robot
Current status:
• Several readout ASICs Fiber system updated for new SiPM configuration
→ Multiplexing of channels to common ADC
New fiber system & SiPM mask
→ Ready to be integrated in robot
• Multiplexer Several
test board
manufactured
tested
readout ASICs
→ Multiplexing ofand
channels
to common ADC
Multiplexer test board manufactured and being tested
• Large board (12 ASICs → 144 channels) being routed
large board (12 ASICs → 144 channels) being routed
• Plan is to have new setup running by end of March
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Signal multiplexing test board
AIDA WP14 Face-to-face meeting
Mainz: specifications
• Size:
• Full area: 365 x 365 mm2
• Strip size: 365 x 30.15 mm2
• Maximum usable space between trigger layers: 58 cm
• Signal input/output:
• Input: Clock & start/stop required from DAQ system for time synchronization via
HDMI
• Output: Ethernet & 1x TTL trigger signal
• Components:
• 24 PMTs, 24 ch. HV, 24 ch. VME discriminator
• Dark box (1,8x1,3x0,8 m³) with air pressure lifting
• FPGA for trigger logic, event validation
L. Masetti - 27/01/16
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AIDA WP14 Face-to-face meeting
Mainz: status
Scintillator + PMT
trigger system
SMD HBU board + space for additional boards
• Mechanical structure finished
• Started trigger logic implementation in FPGA
• PMT characterisation ongoing
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AIDA WP14 Face-to-face meeting
Prague + Bergen: status
GainvsT
• Gain stabilization tests performed in the climate
chamber at CERN using a12-bit digital oscilloscope
controlled in labview
HamamatsuB2
Averageover10pointsandrms
• Measured dG/dV and dG/dT to obtain dV/dT and
correct Vbias as a function of the temperature with a
regulator board in the temperature range 5˚—45˚C
• Tested 8 SiPMs (2 of each type: MPPC B2, MPPC
LCT4 #6 and #9, KETEK W12)
dV/dTvsT
• Gain stabilisation yields good results: mostly within
0.1%, overcorrections only when full measurement
could not be performed and default was used
• Checked effect of after pulsing and found to be
negligible
L. Masetti - 27/01/16
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AIDA WP14 Face-to-face meeting
HamamatsuB2
Prague + Bergen: plans
•Analysis of CTPA and KETEK SiPMs to be completed
•Test with 4 detectors read out simultaneously planned for mid of
February, setup ready for it
•Analysis to be performed online to avoid problems with overcorrection
•Publication foreseen for later this year
•Main goal is to perform gain stabilization for a system with 10 to 20
SiPMs
•Requires a new layout of the data acquisition since the digital
oscilloscope has only 4 input channels
L. Masetti - 27/01/16
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AIDA WP14 Face-to-face meeting
Readiness for first milestone
•First milestone in less than 3 months: Specification of setup
•Clear plans based on needs for CALICE technological prototype
production
•Plan to prepare and circulate first draft of specification document soon
•Expect smooth (but not necessarily fast) convergence to a final
version
•Discussion about information needed by potential users and special
requests should happen NOW!
•Early decisions to finalise construction, commissioning and actual
usage of the infrastructure until deliverable (2018)
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AIDA WP14 Face-to-face meeting
URGENT: input needed!
•In the spirit of AIDA 2020 we would like to provide infrastructure for a
wider range of tests, prototypes, experiments, …
•Still room for requests based on use cases outside of CALICE!
•Construction progressing in parallel with definition of specifications
•Please let us know your needs as soon as possible, while small
changes can still be made!
L. Masetti - 27/01/16
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AIDA WP14 Face-to-face meeting