Transcript Electronics for the INO ICAL detector B.Satyanarayana Tata Institute of Fundamental Research

Electronics for the
INO ICAL detector
B.Satyanarayana
Tata Institute of Fundamental Research
For INO collaboration
INO ICAL prototype detector
13 layers of 5 cm thick magnetised iron plates
40 ton absorber mass
1.5 Tesla magnetic field
12, 1m2 RPC layers
About 800 readout channels
Trigger on cosmic ray muons (RPC and scintillation paddles)
Record strip hit and timing information
Chamber and ambient parameter monitoring
B.Satyanarayana
KEK, Japan
November 27, 2007
2
Electronics scheme for prototype
B.Satyanarayana
KEK, Japan
November 27, 2007
3
Front-ends on prototype chambers
B.Satyanarayana
KEK, Japan
November 27, 2007
4
Typical avalanche RPC pulse
B.Satyanarayana
KEK, Japan
November 27, 2007
5
Preamplifier pulses on trigger
B.Satyanarayana
KEK, Japan
November 27, 2007
6
Charge-pulse height plot
0
60
80
100
120
140
160
180
-20
y = -1.8814x + 128.03
Pulse height, mV
-40
-60
-80
-100
-120
-140
-160
9.9KV
10.0KV
9.5KV
Linear (9.9KV)
-180
Charge, QDC bins
B.Satyanarayana
KEK, Japan
November 27, 2007
7
Pulse height-pulse width plot
20
18
16
Pulse width, Bins
14
12
10
8
6
4
2
9.9KV
10.0KV
9.5KV
0
-180
-160
-140
-120
-100
-80
-60
-40
-20
0
Pulse height, mV
B.Satyanarayana
KEK, Japan
November 27, 2007
8
Charge spectrum of the RPC
 = 375fC
B.Satyanarayana
KEK, Japan
November 27, 2007
9
Time spectrum of the RPC
t = 1.7nS
B.Satyanarayana
KEK, Japan
November 27, 2007
10
Preamps for prototype detector
HMC based
B.Satyanarayana
Opamp based
KEK, Japan
November 27, 2007
11
Front-end boards
16-channel analog front-end
B.Satyanarayana
32-channel digital front-end
KEK, Japan
November 27, 2007
12
Signal router boards
Trigger and TDC
Control and data
B.Satyanarayana
KEK, Japan
November 27, 2007
13
Data and monitor control module
B.Satyanarayana
KEK, Japan
November 27, 2007
14
Data and monitor readout Module
B.Satyanarayana
KEK, Japan
November 27, 2007
15
Final trigger module
B.Satyanarayana
KEK, Japan
November 27, 2007
16
Prototype detector stack & DAQ
B.Satyanarayana
KEK, Japan
November 27, 2007
17
On-line data monitoring system
B.Satyanarayana
KEK, Japan
November 27, 2007
18
ICAL detector fact sheet
No. of modules
3
Module dimensions
16 m X 16 m X 12 m
Detector dimensions
48 m X 16 m X 12 m
No. of layers
140
Iron plate thickness
6 cm
Gap for RPC trays
2.5 cm
Magnetic field
1.3 Tesla
RPC dimensions
2mX2m
Readout strip width
3 cm
No. of RPCs/Road/Layer
8
No. of Roads/Layer/Module
8
No. of RPC units/Layer
192
No. of RPC units
26880
No. of readout strips
3.6 X 106
B.Satyanarayana
KEK, Japan
November 27, 2007
19
What is specific for ICAL DAQ?
Large number of data channels to
handle; large scale integration needed
But, fewer and simpler parameters to
record
Low rates; high degree of multiplexing
possible
Monolithic detector; unlike the case
accelerator based detectors
B.Satyanarayana
KEK, Japan
November 27, 2007
20
Recordable parameters (Detector)
Event data



Strip hit information (Boolean, 1 bit per strip)
Strip signal timing with reference to event trigger
Strips ORed to reduce timing channels
Monitor data


Strip single/noise counting rate
Chamber voltage and current
B.Satyanarayana
KEK, Japan
November 27, 2007
21
Recordable parameters (DAQ)
Preamplifier gain and input offset
Discriminator threshold and pulse width
Trigger logic parameters and tables
DAQ system parameters
Controllers’ and computers’ status
B.Satyanarayana
KEK, Japan
November 27, 2007
22
Recordable parameters (Gas system)
Open loop versus closed loop systems
Gas flow via Mass Flow Controllers
Exhaust gas flow monitor
Residual gas analyser data
Gas contaminants’ monitor data
Gas leak detectors
Safety bubblers’ status
B.Satyanarayana
KEK, Japan
November 27, 2007
23
Recordable parameters (Ambient)
Temperature


Gas
Front-end electronics
Barometric pressure

Gas
Relative humidity


Dark currents of the bias supplies
Electronics
B.Satyanarayana
KEK, Japan
November 27, 2007
24
Broad aspects and requirements
RPC bias, signal pickup and front-end electronics
Digital processing and data readout
Data control and acquisition
Trigger and global clock systems
Slow control and monitoring






Electronics, trigger and data acquisition systems
Low and high voltage power supplies
Closed loop gas system
Cavern ambient parameters
Magnet operation and control
Access, safety devices and control
B.Satyanarayana
KEK, Japan
November 27, 2007
25
Major sub-systems
Analog and digital front-ends


Mounted inside RPC assemblies
Programmable(?) preamps and comparators
DAQ stations




Mounted on detector front-faces
Latches, pre-trigger generators, pipelines and buffers
Time to digital converters (TDCs)
Data concentrators and high speed serial transmitters
VME back-ends


Data collectors and frame transmitters
Trigger control and fan-outs
Trigger system


Works on inputs from front-ends, back-ends or external
Place for high density FPGA devices
B.Satyanarayana
KEK, Japan
November 27, 2007
26
Technology standards
RPC bias: Industrial solutions, DC-HVDC
Front-end: ASIC
Digital processing: ASIC/FPGA
Backend: VME
Trigger system: FPGA, Farms(?)
Operating system: Linux
Slow control: SCADA/PVSS/Ethernet
B.Satyanarayana
KEK, Japan
November 27, 2007
27
ICAL detector concept
50 Kton magnetised ICAL
B.Satyanarayana
KEK, Japan
November 27, 2007
28
Placement of front-end electronics
B.Satyanarayana
KEK, Japan
November 27, 2007
29
Cables & services routing
RPC
Signal cables from RPCs
B.Satyanarayana
KEK, Japan
November 27, 2007
30
DAQ & services’ sub-stations
B.Satyanarayana
KEK, Japan
November 27, 2007
31
A promising DC-HVDC chip
Can this be good cheaper alternative to commercial solution?
B.Satyanarayana
KEK, Japan
November 27, 2007
32
Fast preamp ASIC
Rise Time: ~1ns
Power consumption: ~100mW
Power supply: 3.3V
Technology: 0.35
Dynamic range: 50-350fF
B.Satyanarayana
KEK, Japan
November 27, 2007
33
Comparator ASIC
B.Satyanarayana
KEK, Japan
November 27, 2007
34
Example for front-ends: NINO
Francis Anghinolfi et al
B.Satyanarayana
KEK, Japan
November 27, 2007
35
Other examples for front-ends
Front-end for ATLAS Muon RPC system
Front-end for CMS Muon Barrel RPC system
B.Satyanarayana
KEK, Japan
November 27, 2007
36
J. Christiansen, CERN
HPTDC architecture
B.Satyanarayana
KEK, Japan
November 27, 2007
37
HPTDC specifications
B.Satyanarayana
KEK, Japan
November 27, 2007
38
Yasuo Arai (KEK)
AMT chip for ATLAS Muon RPC
B.Satyanarayana
KEK, Japan
November 27, 2007
39
AMT chip performance
B.Satyanarayana
KEK, Japan
November 27, 2007
40
ALICE TOF timing system
Good example of a
large scale integration
of timing system using
industrial support
(CAEN)
VME64X backplane
2400 high resolution
(25pS) channels per
crate
Crate equipped with
other control, trigger,
communication and LV
supply modules
B.Satyanarayana
KEK, Japan
November 27, 2007
41
Summary
RPC’s pulse characteristics and ICAL’s requirements
understood to a large extent; more will be known from the
prototype detector
Time to formulate competitive schemes for electronics, data
acquisition, trigger, control, monitor, on-line software,
databases and other systems
Feasibility R&D studies on front-ends, timing elements, trigger
architectures, on-line data handling schemes should be
concurrently taken up
Segmentation, power budgets, integration issues etc. must be
addressed
Trade-offs between using available solutions and customised
design and developments for ICAL to be debated
Design tools, infrastructure, fab facilities
Needs national and international collaboration and team work
B.Satyanarayana
KEK, Japan
November 27, 2007
42
Backup slides
Typical first stage preamp response
 Rise time: ~2ns
 Gain: 10
 I/O impedance: 50 
 Package: 22-pin DIP
Size: 30X 15 mm)
 Power supplies: ± 6V
 Power consumption: ~110mW
 Bandwidth: 350MHz
B.Satyanarayana
KEK, Japan
November 27, 2007
44
HMC performance: Dynamic range
4500
1000
900
800
700
600
500
400
300
200
100
0
4000
3500
3000
2500
2000
1500
1000
BMC 1595
500
0
0
100
200
300
400
500
0
600
2500
BMC 1596
20
40
60
80
100
120
2500
2000
2000
1500
1500
1000
1000
BMC 1597
500
BMC 1598
500
0
0
0
B.Satyanarayana
50
100
150
200
250
KEK, Japan
0
50
100
150
200
250
November 27, 2007
45
HMC performance: Timing response
BMC 1596
BMC 1595
BMC 1597
B.Satyanarayana
BMC 1598
KEK, Japan
November 27, 2007
46