CALICE meetingKyushu Universty
07/03/2016
Status of the SiW-ECAL prototype
Vincent BoudryÉcole polytechnique, Palaiseau
TNA support + WP14
[email protected] Title | Meeting, Place | Date 2/28
Analyses from 2015 BT
Preparation of 2016 BT– Long Term Plans
ILD Studies– Thermal studies
– SK2A
– Long SLAB tests
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 3/28
Beam test at CERN nov 20152–16th of november
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 4/28
Side running
Paolo Meridiani (Milano):
test of prototype MicroChannel Plateswith MgO coating in a small vacuum chamber
Since 11th November
HI muon beam
Taikan Suehara(Kyushu U., CALICE)
Test of alternativeGuard Ring designon babywafers(3×3cm²)
Noise pbms
HI muons beam
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 5/28
Running conditions
4 layers ready for TB on test plates and put in the setup, the last layer was not operational (faulty HV) and wasnot used.
– Position of layers: beam → DIF1, DIF2, DIF0
– Each layer had 4 x 256 pixels / channels.
– All layers were always power pulsed.
Spills: Several settings tried,
– mainly long spills (eg. 200 + 50 msec = data taking + readout/dead time) to increase statistics with SPS spills of afew seconds, so, effectively corresponding to quasi-continuous mode.
– Also, some special runs with short spills 2.5 + 247.5 msec (no BX clock cycling)
DAQ: No problems with configuration of the setup.
High Gain: All data have been taken with feedback C=1.2 pF (nominal value is 6 pF)
– 5 times higher gain and better S/N (unexpected), but lower dynamic range
Selected trigger threshold = 230 after suppression of noisy cells
– much better than in cosmic runs one year ago (~290) but ≥ 220 (used for 2013 cosmic runs PCB (FEV8) ).
– Special runs with a few triggering cells in showers
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 6/28
Very smooth running
DAQ: single crash (due to unchecked scripting)
Many many data taken (but “only” ~85 GB)
– Beam structure + ACQ for ILC (burstsof 50ms × 4Hz)
Muons runs
– Calibation first @ high threshold
– variation of threshold, and angles (49°, 90°)
Electrons of 15, 30, 50, 100, 150 GeV
– with 8.5 X0
– with mini-cal option this WE
Pions of 50 and 150 GeV with 1.75 λ
– Check non un-conventionnal events
Masking : 2.2% of all channels
Muon beam spots (X-Y distribution ofN triggers, requiring ADC-pedestal>10)from typical muon run 361 as example
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 7/28
Analyses
1st : verification of behaviour with simple events
– SK2 response ⇐ was a priority for SK2A prod
– Filtering Noise and establishing clean events
2nd : check of collective response
– Correlation between plates
– Modelling of shower response
• G4 MC being written by A. Psallidas (National Taiwan University, CMS)
Examples given hereanalyses fromV. Balagura, K. Shpak
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 8/28
Triggered Noiseby Vladislav Balagura
Distribution of Number of successive BX by classes (of10) of Max(ADC-pedestal) for All Chips or Single Chips
– ≠ red and blue ⇒ retrigger in common.
• This is the case for peak at zero
Not seen in DIF0 ⇒ thr. lowering limit due to re-triggering.
– even in “clean” DIF0&1: 25% of events have RTfor 50% of SK2 memory
(ADC – pedestal) in DIF 2 and DIF 0 for comparison (DIF 1 is even better), all channels combined,
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 9/28
Threshold level scansby Vladislav Balagura
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 10/28
Threshold level scansby Vladislav Balagura
⇒ efficiency at MPV=60: eff ~ 96%, eff=50% at about 30 ADC counts.
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 11/28
Features of SK2by Vladislav BalaguraRetrigger pattern:
– Chain of re-triggers until Nch=64
• due to global ped. shift resetted ch by ch.until all have triggered (best expl.)
– pedestals shift seen in ADC
Pedestal splitting is channeland layer dependant
Shift doesn’t affect physics signal (mip here)
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 12/28
Square eventsby Kostya ShpakNormal event Shoot @ 90°
4 Sq in 1 event
5 squaresin 4 events
Tools ready for statistical caracterisation
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 13/28
Others (not devoppeled here)
Masking verification: some issues
Data corruption
– in case readout time wasn’t sufficient
• corrected by DAQ settings
Negative signal (ADC=4)
– located near the DIF connectors
Pedestal stability
– Slow drift after power one on longperiod
Splitted and delayed triggers
Chip full events
Un-operationnal chips if SCA=15 in ACQ-1
Pedestal width:
– S(MIP) / RMS(pedestal) =17..18.
• Good even for short spills with “real”power pulsing and drift effects
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 14/28
BT in 2016 and beyond
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 15/28
Beam test in 2016
Real calorimetric tests with 7–12 SLAB’s in coordination with SDHCAL
– 7 ASU ready; production should resume in april
– real SLAB’s (no more test plates) prod (will) start(ed) this month: see Roman’s talk
• improved S/N ratio, robustness
– dependant on beam period (still under discussion)
• eventually could re-use some the CMS time in sept/oct.
Flexible structure to accommodate
– variable number of SLAB’s
– be in “real conditions” for PFA tests:
• 24 X0 of W + 3 cm hgap before SDHCAL
[email protected] Title | Meeting, Place | Date 16/28
Test of HW: long slab
– Long slabs: what can’t be done with a small RA source ?
– perf in strong B field, with PP.
Test of PFA’s
ECAL standalone
– separation of showers studies (γ’s, e’s) ⇒ tracking in front ?
• e+γ beam (thick target with a magnet in front ~10 m)
ECAL + HCAL
– SW superposition of showers γ/e + h
– Physical superposition of showers (h+γ ?)
Test of PFA in B field
– Tracking, B effect in RPC’s (?)
on mechanics with PP,
– ⇒ Reduction in size of the SHDCAL (last 10 layers) to fit in the M1 magnet in H2B ?
• (~30 cm missing) ?
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 19/28
Integration in ILD: thermal studiesby Denis GRONDIN / Julien GIRAUD (LPSC)
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 20/28
Integration in ILD: thermal studiesby Denis GRONDIN / Julien GIRAUD (LPSC)
Heat exchanger assembly15 -SLAB’s in EUDETmodule
Insulation
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 21/28
Integration in ILD: thermal studiesby Denis GRONDIN / Julien GIRAUD (LPSC)
8 day period
Conclusion:
– Efficiency of ex. isolation ✔
– Thermal test takes time…
Ready for cooling tests...
3 day period
Power without cooling
– P= 15.476 W
Peaks in external temp due to directsunlight
[email protected] ILD SiW-ECAL optiminsation | ILD SW & Optim WS | 25/02/2016 22/28
Simulation modificationsSlide from Sept 2014
Cleaning & adapatation of ECAL Mokka drivers:[D. Jeans + J. Marshall + E. Becheva + V. Boudry + Dan Yu]
– Many cleaning made by D. Jeans ⇒ SECal05
• Bugs, improved GEAR output, handling of pre-shower
– Documentation being reviewed
– TBD: Implementation of SEcal05 in DDHEP (based on S. Lu implementation of SEcal04 + tests)
• Done for CLICdp by D. Protopopescu & M. PetricNeeds to be review / adapted for ILD vs SECal04
New ECAL Driver (SEcal06) to correct defects (mostly in Endcaps).
– Missing dead materials, “corners”
– Consistant treatment of Barrel/Endcaps
– Better handling of Layers, optionnal pre-shower
Status of Sept 2014
[email protected] Joint CALICE-HGCal TB | HGC testbeam meeting | 22/07/2015 24/28
“Final” prototype test (2016+)
Tower of 18×18 cm² (2×2 wafers)14 Short SLABs 1 Long SLAB
2×2.1mm/lay 2×4.2mm/lay
Frotin – CALICE meeting – 17/09/2009
25
The goal:
7.3 – Testing the response of the short SLAB with 4 wafers!
- TB position to be tested- DAC Testing……- and surprises!!!
7-Slab for Test beam 2015
1 Aluminium plate
4 short SLAB
Cover shielding
Windows of 15 mm forW
Cable panel
Led panel position
A word about names
«ILD SiW-ECAL technological prototype»
more of less recently :
– EUDET prototype
– CALICE SiW-ECAL technological prototype
– ILD SiW-ECAL (in conferences)
– SiLC in recent project call in Paris-Saclay
The prototoype is clearly being designed for the ILC, and ILD.
– ≠ from requirements for CLIC-SiW-ECAL, CMS-HGCAL, ATLAS-HGTD, FCC/CEPC
– CALICE is the structure to make this : e.g. recognised for this by CMS (and others)
“A high granularity calorimeter system optimised for the particle flow measurement of multi-jetfinal states at the ILC running, with centre-of-mass energy between 90 GeV and ~1 TeV”
⇒ open it up for other applications ?
Physics program
Physics commissioning:
– Check proper running with high intensity μ’s (X-check of cosmics)
– Thr. adjustment vs noise environment. (Maybe require shielding).
EM-Core Set-up: All slabs after 5 X0 of W → Strong correlation between SLAB’s
– Response at the core of a EM shower:
• Explore the full dynamic range (1–2500 mips) using shower profile (for all mem depth).
– e– runs of all energies, beam rates → linearity
• Check the responses at the wafers edges with ≠ types of wafers (square events)
– Scan in positions
HAD-Core set-up: same as EM-core or with 1λ of W / SS
– Response to HE hadrons: look for SEU
Mini-ECAL set-up: Sampling with 3-4 × 2.5 X0 and 2-3× 5 X0
– Study of theoretical resolution & simulation tuning.
• Scan in energy, position (and angle).
In parasitic mode:test of Babywafers (Kyushu, LLR)