HCAL – Integration Plans
Mathias Reinecke HCAL – Main meeting 18.4.2007
1. Introduction2. HCAL Base Unit (HBU) - Update3. Testboards4. Light Calibration System (LCS) –
Constraints
HCAL Base Unit (HBU) – first idea
Mathias Reinecke HCAL – Main meeting 18.4.2007
Sector wall
Reflector Foil100µm
Polyimide Foil100µm PCB
1mm
Bolt with innerM3 threadwelded to bottom plate
SiPM
Tile3mm
HBU Interface500µm gap
Bottom Plate600µm
ASICLQFP-1441.4mm high
Top Plate600µm steel
Component Area: 1.7 mm highHBU height:7.2mm(6.0mm without covers => absorber)
AbsorberPlates(steel)
Spacer1.7mm
Top Plate fixing
HBU – Constraints
Mathias Reinecke HCAL – Main meeting 18.4.2007
ASIC - TQFP10036 inputs (1mm)
PCB (shown transparent):Two signal layers (50): - CLK, Control, Data, LED - SiPM Readout, HV
SiPM Contact Pins(soldering, ~1mm)
Connector (1.1mm)
HBU – PCB layer structure I
Mathias Reinecke HCAL – Main meeting 18.4.2007
-6 layer design with cut-outs for ASICS and connectors-75 Lines for high-gain SiPM setup-Three signal layers for impedance-controlled routing-Total height (PCB + components): 1.32mm- Feasibility / Cost-factor under investigation
HBU – PCB Layer Structure II
Mathias Reinecke HCAL – Main meeting 18.4.2007
-6 layer design with standard setup-75 Lines for high-gain SiPM setup-Two signal layers for impedance- controlled routing-Total height (PCB + components): 1.72mm (old value: 2.7mm)
Testboard I : LED
Mathias Reinecke HCAL – Main meeting 18.4.2007
Test LED integration into HBU (LCS): Proof of principle together with our colleagues from Prague
-Crosstalk of driving circuit to SiPM?
-Integration to PCB / coupling to tile?
-Connector test: stability, number of connection-cycles?
Features:- SMD LEDs (two types) LED size 1.6 x 0.8 x 0.6 mm³- Several LED driving circuits- >2 Tiles with analog output- proposed HBU Connector- Multilayer PCB needed!! (crosstalk test)- No ASIC…
Testboard II : SPIROC
Mathias Reinecke HCAL – Main meeting 18.4.2007
SPIROC (ASIC) Testboard IS HBU prototype!
Test of:-Cassette (=HBU) assembly (tiles, electronics, cover)
-Performance of SPIROC in the dense HBU setup (noise, crosstalk, power, gain, …)
-LCS with LEDs on board
-Signal Integrity (see Testboard III), Communication with DAQ
-Analog AND digital outputs / interfaces (next slide)
Testboard II : Integration
Mathias Reinecke HCAL – Main meeting 18.4.2007
Interface to HCAL prototype?(SPIROC timinginformation needed)
Environment of the SPIROC Testboard:
Stand-alone, or Integration into old DAQ?(Menpower problem …)When using CRC:
Analog or digital readout?
Testboard III : Power-System
Mathias Reinecke HCAL – Main meeting 18.4.2007
Test Power-Ground System (2.20m):
-Oscillations when switching?
-Voltage drop, signal integrity (traces, connectors)?
-SPIROC performance @ far end (blocking caps sufficient)?
‚LayerConcentrator‘
SPIROCTestboard
Extenders(Power-Gnd, Traces)
Light Cal.-System - Constraints
Mathias Reinecke HCAL – Main meeting 18.4.2007
1. Photons per second into tile:
2. Optical output power (LED):
snst
Nn PHPH
11020
5
100 9
nWhc
nP PHopt 10
nms
mc
Jsh
LEDUV 400
103
10626.6
_
8
34
Tile: For 1 MIP ≈ 15 pixels ↔ 12 photons * 5 * 1.75 ≈ 100 photons
Crosstalk (1.25px)
SiPM efficiency (20%)
Losses
Light Cal.-System - Constraints
Mathias Reinecke HCAL – Main meeting 18.4.2007
3. From LED data sheet:
4. Charge in single pulse:
VmAmWPopt 5.3&[email protected]
fCnsnAtIQ drive 91.05181
nAInW drive 181:10
Current/Charge is dominated by LED capacitance and/or parasitics
=>
Light Cal.-System - Constraints
Mathias Reinecke HCAL – Main meeting 18.4.2007
5. LED Input Power (Heat, only when active)
WVIP diodedrivein 633.0
nWPPP optinheat 623
LED driver has to be added (not yet clear)
Promising parameters for a low-crosstalk LED implementation!Verification together with our colleagues from Prague.
LED Drive Circuits
Mathias Reinecke HCAL – Main meeting 18.4.2007
Analog Driver
12
6.0
R
VUI inLED
110
10
25
5181
k
mVnA
Digital Driver
2,
R
VVVI satTLEDCalibLED
Transistor is ‚on‘ or ‚off‘
k
VVVnA
250
25.05.38.3200
To be tested: Transistor Speed, LED Speed (Capacitance), Output Power, Driver Power ???
Conclusion
Mathias Reinecke HCAL – Main meeting 18.4.2007
-LED Testboard design starts now.
-HBU PCB structure in discussion with companies.
-SPIROC Testboard (HBU protot.) design started summer/autumn 2007 (ASIC Pinout and loading sequence is not fixed).
- Time schedule for DAQ (possibly prototype) should be discussed.