Transcript HVSBstatus_02_09 - Indico

CALO HV Status bits for ODIN
• Introduction
Status bits of the LHCb readout supervisor ODIN
• HVSB board specification
• HVSB board block diagram
• Board consideration
• Planning of the board development and production
LHCb CALO meeting 4.02.09
Anatoli Konoplyannikov [ ITEP / LAPP ]
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CALO HV Status bits for ODIN
Introduction
All calorimeter HV systems (ECAL-HCAL, PRS) are based on CW DC – DC convertors. The
pumping middle voltages are produced by Agilent power supplies. The HV_LED_DAC
boards distribute the 80 V power to ECAL and HCAL CW bases and PRS HV boards
equipped with CW convertors are used the 150 V. The current consumption from middle
voltage power depends of a HV value. For HV PHYSICS settings expected current
consumption is about:
• 3 mA per channel for PRS ; 0.3 A for one sub-detector side of 100 channels.
• 0.5 mA per CW base for ECAL; 1.5 A for one sub-detector side of 3008 channels.
• 0.6 mA per CW base for HCAL; 0.4 A for one sub-detector side of 744 channels.
ECAL and HCAL MV power is distributed to a group of CW bases. From 16 to 40 bases in one
group are powered by one line. Each power line has the over current protection relay that
goes off when a current is over limit and after this the 100 V power supply current is
changed on 10 – 35 mA.
This estimation shows a needed sensitivity of a current monitoring circuitry that will be
produced the HV Status bits for ODIN. In case if a part of the CW bases is OFF or the MV
power supply current is high (near the current limit setting) we can set the ODIN status
bit to ON (it will mean detector in Bad condition).
Design of a simple electronics board for a power supply current measurement and
transmission the status bits with needed levels to ODIN is under progress now.
LHCb CALO meeting 4.02.09
Anatoli Konoplyannikov [ ITEP / LAPP ]
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CALO HV Status bits for ODIN
to Electronics platform
Barack D3
HCAL,ECAL,PRS 100 V
SPECS RJ45 cable to control PC in D2
Power Supplies
New electronics board
“HV Status Board”
(HVSB)
Additional LV
power supply for
HVSB board
SPECS Mezzanine
100 V power long
distance cables
to detectors
HVSB board functionality:
Fast measurement MV power
supply currents.
Produce the “warning” LVDS
signal (one bit per sub-detector)
to the ODIN in case when the
power current is out of range.
Board equipped with DAC,
comparator and logic IC’s.
LVDS RJ45 cables
ODIN
Rack with CALO MV
Agilent Power Supplies
The Specs mezzanine will be
used for DC levels measurement
by DCU-ADC and communication
with ECS.
Sketch of the possible implementation sending status bits to ODIN
LHCb CALO meeting 4.02.09
Anatoli Konoplyannikov [ ITEP / LAPP ]
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CALO HV Status bits for ODIN
Block diagram of HVSB board
ECAL_A
MV line
I to V Converter
ECAL_C
MV line
I to V Converter
HCAL_A
MV line
I to V Converter
HCAL_C
MV line
PRS_A
MV line
PRS_C
MV line
Logic
FPGA
ACTEL
or
ALTERA
I to V Converter
I to V Converter
LVDS drivers to ODIN
12 comparators
I to V Converter
SPECS Bus
Min
6 chan. DCU-ADC
SPECS Mezzanine
I2C
bus
Max level
12 DAC IC’s
LHCb CALO meeting 4.02.09
Parallel Bus
Status Indicators
Anatoli Konoplyannikov [ ITEP / LAPP ]
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CALO HV Status bits for ODIN
Board consideration
There is one open question concerning of the power supplies DC decoupling. There are two
possibility. First one is connect the ground lines of the MV power supplies together or other
one is use an opto-coupling technique for keeping the ground lines separated.
In the first case an analog part of the HVSB board is much simple, but some tests will be
needed for verifying EMC noise.
In the second case an analog part is more complicated and linear optocoupled amplifier can
be used. For example a linear Amplifiers the IL300 Optocoupler produced by Vishay
Semiconductors could be used for implementation the current to voltage converter.
Schematic of the linear
optocoupled amplifier.
Positive Unipolar Photovoltaic Amplifier
LHCb CALO meeting 4.02.09
Anatoli Konoplyannikov [ ITEP / LAPP ]
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Detector HV Status bits for ODIN
HVSB board consideration
Mechanical implementation and board powering.
Mechanical implementation of the HVSB board could be similar the HV_LED_DAC
implementation with simple non standard mechanics. The board will be inserted into the rack
with MV Agilent power supplies. The low voltage power supply (Agilent PS) will be placed
under the HVSB board in the same rack (see sketch on slide 3).
Status Indicators
Specs RJ45
Drivers to ODIN
160
Sketch of the HVSB printed
circuit board with main
components placement
SPECS
Mezzanine
Logic
FPGA
Analog Circuits
LV
Pwr
Input/Output MV connectors
232
LHCb CALO meeting 4.02.09
Anatoli Konoplyannikov [ ITEP / LAPP ]
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CALO HV Status bits for ODIN
Conclusion & Planning
 The possible solution of the CALO sub-detector status bit realization has been presented.
The solution is based on the MV power supply current measurement.
 Together with Cyril perform an analog part simulation and prototype test of the HVSB
board.
 Order needed electronic components.
 Start a board development using CADENCE software at CERN and LAPP.
 Develop firmware for control logic FPGA.
 Develop PVSS project for monitoring and control HVSB board.
 Develop a DIM server for an additional LV power supply and integrate power control into
existing PVSS project.
LHCb CALO meeting 4.02.09
Anatoli Konoplyannikov [ ITEP / LAPP ]
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