Transcript fp420_LV_feb__2007_HL_final - Indico

FP420
Low and high voltage supply
Henning E. Larsen,
INFN
[email protected]
Feb. 2007
HV-LV supply segmentation
PT1000 Temperature
sensor?
1 Superlayer =
2 Hybrids/Blades
4 2D detectors
1 MCC
1 Read-out interface
Now only 2 det.
not 3 as shown
Pixels:50x400um
and 400x50um
Drawing: From Ray Thompson
Damage depends on
distance from the beam.
Required bias voltage
and current increase with
radiation dose.
MCC: Module Controller Chip
Specification for LV for 1 superlayer
PixChips/4
Voltage
Current
Current limit
Analog
1.6-2.0V
Nom 2V
5-70mA
100mA
Digital
1.5-2.5V
Nom 2V
1% occupancy: 40-50mA
10% occupancy: 60-70mA
100mA
MCC/1
Voltage
Current
Current limit
Digital
1.8-2.5V
120mA-150mA
170mA
Ripple at 1MHz is critical. Remote on/off. Monitor current.
Digital supply for Pixelchip and MCC is common as seen from supply.
4 PixChips + 1 MCC Voltage
+ Read-out?
Current
Current limit
Analog
1.6-2.0V
20-280mA
310mA
Digital
1.8-2.5V
1% occ 280mA-350mA
10% occ 360mA-430mA
480mA
Monitor resolution
<20mV
<10mA
Specification for HV supply for one superlayer
4 detectors
2 voltages
Monitor
Resolution
Voltage
Current
Current
limit
-10-120V
<1mA
1mA
<1V
1μA
Voltage is negative, but floating.
Referenced to AVDD on PIXELCHIP,
not GND
HV connection diagram used in Atlas
Source: Maurice Garcia-Sciveres
Location for service electronics
Until today we suppose:
•
If the LV electronics should stay within some 20m from the detectors, there are only two possible locations (ref Daniela
Macina):
– Below the new cryostat, where the radiation level is estimated at about 700 Gy per year of running at full
luminosity;
– Below or near the adjacent magnets, where the radiation is much lower and estimated at about 15 Gy per year,
but where there are already other things.
Space for service electronics.
•Few meters of cable
•Radiation level?
•Shielding possibility?
Space for electronics needing
close proximity to detectors
FP420 detectors
Space for HV LV under
adjacent magnets: Height
available=400mm
Solution options for HV and LV
• Commercial
– Caen
– Wiener
– Eplax
• Home-made
Commercial: Caen
CMS/Atlas counting room
Atlas or CMS
SY1527
Slow control
A1676A
A1676A
Crate Ctl
Crate Ctl
LHC Tunnel
EASY 3000
A3486
EASY 3000
A3501
A3501
A3501
12ch
A3501
12ch
A3501
12ch
A3501
HV
12ch
A3501
HV
12ch
HV
12ch
HV
12ch
HV
HV
HV
A3009
A3009
A3009
12ch
A3009
12ch
A3009
12ch
LV
12chLV
12ch
LV
LV
LV
2x48V
Power
EASY 3000
A3501
A3501
A3501
12ch
A3501
12ch
A3501
12ch
A3501
HV
12ch
A3501
HV
12ch
HV
12ch
HV
12ch
HV
HV
HV
A3009
A3009
A3009
12ch
A3009
12ch
A3009
12chLV
12chLV
12chLV
LV
LV
Cryostat 1
A3486
EASY 3000
Cryostat 2
FP420
FP420
FP420
FP420
FP420
FP420
FP420
FP420
FP420
FP420
pocket
pocket
pocket
pocket
pocket
pocket
pocket
pocket
pocket
pocket
2x48V
Power
Commercial: Caen
Cable:
500m
A3009 LV
A3501 HV
A3009 LV
A3501 HV
A3486 48V Power
•Modules
•Delivery not possible before summer 2008 due to LHC production bottle neck. Only few
samples by mid 2007.
•CAN bus link over 500++m require slow down to 250kbit/s. This is not yet tested but should be
ok. Requires modification of firmware:
•High voltage only up to 120V (requires modification from 100V nominal)
Commercial: Caen, pictures
EASY 3000
A3009
SY1527
Counting room
Rad exposed
A3501
A3486
Not to scale
The TSL beam
The TSL (Theodore Svedberg
Laboratory) is located at the
Uppsala University. It is a
cyclotron, providing protons (up
to 180 MeV) or Ions (up to 1.24
GeV).
We used a proton beam of 159
MeV energy, with a fluence of 6
x 107 p/(cm2s).
The horizontal profile of the
beam is shown on side. Its width
is 20 cm at 80% fluence,
allowing the irradiation of a
whole 6U distributor.
From: Agostino Lanza (INFN-PAVIA) http://www.pv.infn.it/~servel/atlas/hv/hv_sys/index.html
Caen: A3009 LV supply radition test results
A3009 Used by ATLAS RPC and LVL1, plus CMS and others
1.
TSL Upsala, May 2006. 159 MeV proton synchrotron
1.
By: Cern Electronics Pool (Allongue, Anghinolfi and Fontaine), by
Passuello from Caen and Agostino Lanza (INFN-PAVIA)
Tested to 140Gy or 2x1011 p/cm2 with results:
2.
•
•
•
One unplugged events solved with remote hardware reset.
•
One fake trip (non shown on the monitored loads), solved with a
remote "clear alarm”.
No reports about gamma test.
Has been certified for ATLAS .
Caen: A3486, 400 Vac tri-phase – 48 Vdc converter
•
•
A3486 is used many places in ATLAS RPC and LVL1, plus CMS. Unit is a common
unit for supplying all the Axxxx type converter boards throughout Cern
TSL Upsala, May 2006. 159 MeV proton synchrotron
–
By: Cern Electronics Pool (Allongue, Anghinolfi and Fontaine), by Passuello
from Caen and Agostino Lanza (INFN-PAVIA)
–
Tested to 140Gy or 2x1011 p/cm2 with results:
–
•
•
One undervoltage on the second channel,solved with a recovery reset
Looking for reports about gamma test.
Has been certified for ATLAS .
.
A3501 HV supply radition test results
A3501 has not been radition tested. It is said by CAEN to be largely equivalent to
A3540 (12x4KV).
Test results for A3540 are as follows:
1.
2.
Casaccia, Jan. 2006: CO-60 source, named “Calliope” in the ENEA-Casaccia
•
Monitor showed undervoltages after 54 GY, but without any inconvenient to
the outputs. During the interval between the two periods, the controller board
was replaced with a new one, but again after 73 minutes (60 Gy) from the
beginning of the second period it started showing undervoltages.
•
After 134 Gy, channels started to fail. The last channel to die was ch 1, which
lasted 239 minutes (165 Gy).
•
Information from: http://www.pv.infn.it/~servel/atlas/hv/hv_sys/casaccia_report.ppt
Casaccia, March 2006: CO-60 source
•
3.
Localized the problems from Jan 2006 to the controller boards (EEPROM´S).
Replaced by new type (Renesa) => up to 200Gy with only soft-errors which can
be recovered by remote operation. Approved for Atlas.
TSL, Uppsala Jan. 2006: 159 MeV proton synchrotron, fluence of 6 x 10^7
p/(cm2s).
•
All 12 channels of the A3540 died below the 140 Gy limit, as expected from
the previous Casaccia test.
•
Information from: http://www.pv.infn.it/~servel/atlas/hv/hv_sys/index.html
Caen solution: count of HV+LV
tunnel items
• One pocket is:
– 5 Super layers = 10 HV + 10 LV
– One A3501 + one A3009 = 2+4 slot = 6 slots in an
EASY3000 crate
• Concluding:
– 1 to 3 pockets = one EASY3000 crate+one A3486
AC/DC crate
– 3 to 6 pockets = two EASY3000 cartescrate+one A3486
AC/DC crate
Notes
• Cable length to counting room is like 500m
for CMS. Still missing numbers from Atlas.
• Caen communication using CAN bus over
this distance is not tested but should work at
slow speed, 250kbit/s.
• Pocket counts is important
• No provision for temperature monitor of
front end!
Commercial: Wiener solution A
4*2 Mpods with 80ch each.
Mpod
x8
Location: Counting room
Now only 2 HV
•
•
•
•
.
Now only 2 HV
2x4 Mpod-like systems (8U,19” each) will be arranged to provide the requested voltages
over 500 m distance,
Located in the counting rooms and will host both HV and LV modules.
2 cable pipes with 10 cm section (or probably less) are needed.
The Mpod will require custom -120V modules.
Commercial: Wiener solution B
HV: One per cryostat
LV: One crate per pocket
LV: One crate per pocket
Mpod
x5
x2
x5
1 Maraton
1 Maraton
Now only 2 HV
•
•
•
•
2x10 Maraton-like radiation tolerant systems (3U) will provide LV and operate close to
the detectors.
2x2 Mpod-like devices will supply HV from the counting rooms.
This solution requires a customization of Maraton in order to optimize it for low
currents.
The Mpod will require custom -120V modules.
Commercial: Wiener solution C
2.2 crates per pocket
x 11
2.2 crates per pocket
x 11
H=3U=131mm
1 Maraton
1 Maraton
Now only 2 HV
•
•
•
•
•
2x22 Maraton-like system will provide HV and LV and operate close to the
detectors.
Simple cable
These systems will be optimized for the given current range.
Need customization for -120V modules
Proven radition tolerance: 722Gy, 8 1012n/cm2
Power calculations
One superlayer
AVDD
DVDD
HV
Total load per SL
Voltage[V] Current[A] Power[W]
2
0.28
0.56 W
2.5
0.43
1.075 W
100
0.001
0.1 W
1.735 W
One pocket
Superlayers
#
5
8.675 W
One station (Cryostat)
Pockets
#
5
43.375 W
Values are worst case (highest) power
Conclusions
•
•
•
•
•
Suggest putting the LV/HV crates under the adjacent magnets. Room has been
reserved (almost).
Caen solution is an all-in-tunnel solution with short HV-LV cables. No long
bulky noise suceptible cables to put.
Caen commercial solution is ok up to 140Gy for 2 out of 3 modules (Atlas
certified) but:
Caen A3501 (HV) need to be tested for radiation tolerance. There are no specific
rad results available. Only results are based on its equivalence to A3540 (Atlas
HV)
Some customization are needed
– CAN modules
– A3501 (HV)
•
•
•
Number of superlayers per station is interesting for the required number of
crates
Caen and Wiener solution has no provision for temperature monitor of front
end!
Wiener solution is spec’d to be radiation tolerant to 700Gy which is greater than
we actually need.