Transcript LVjuly08 - CERN Indico

FP420
Low and high voltage supply
[email protected]
INFN/Univ. of Torino
July. 2008
A presentation intended to stimulate the discussion
on which solution is best
1)
Near station
CAEN
Easy3000
Near
station
Description of solution
LV
HV
Wiener
MPOD
3)
Counting room
Wiener
Maraton
TBD
Counting room
2)
Alcove
Wiener
Maraton
CAEN
Easy3000
Cable
cost
Module
cost
4*6k€
180k€+
10k€
TBD
4*6k€
(approx.)
TBD
4*20k€=
80k€
TBD
TBD
4*20k€=
80k€
4*27k€=
108k€
TBD
TBD
Notes

Maintenance access,
radiation and SEU issues

Maintenance access,
radiation and SEU issues.
Need further radiation
tolerance qualifications
Maintenance access issues
No voltage tuning from
remote.
Maintenance access issues.
Need linear regulator.
No voltage tuning from
remote.
Moderate radiation
QUARTIC/GASTOF's
regulator +-12V issues
Lowest module cost.
High cable cost.
Need linear regulator.
No voltage tuning from
remote.
Little or no radiation or
access issue.
QUARTIC/GASTOF's
regulator +-12V issues






TBD






TBD


1) All in tunnel -- CAEN
•A3009, A3486, A3540, A3801 tested up to 140-150 Gy. A3501 never tested.
•500 m cable too long for CAN protocol, modification of hw necessary
1) Tunnel/counting room -- Wiener
MPOD LV next to cryostat
MPOD HV in counting room
MPODs never radiation tested – Wiener
optimistic and willing to test
Maraton LV next to cryostat
MPOD HV in counting room
Customisation of Maraton necessary
(low currents)
Maraton tested up to 700 Gy, but limited
Remore control
2) Alcoves/counting room -- Wiener
Customisation of Maraton necessary
(low currents)
3) Counting room
Wide choice of supplies, lower cost, easier maintenance.
High cable cost, need local rad-hard regulators
1)
Near station
CAEN
Easy3000
Near
station
Description of solution
LV
HV
Wiener
MPOD
3)
Counting room
Wiener
Maraton
TBD
Counting room
2)
Alcove
Wiener
Maraton
CAEN
Easy3000
Cable
cost
Module
cost
4*6k€
180k€+
10k€
TBD
4*6k€
(approx.)
TBD
4*20k€=
80k€
TBD
TBD
4*20k€=
80k€
4*27k€=
108k€
TBD
TBD
Notes

Maintenance access,
radiation and SEU issues

Maintenance access,
radiation and SEU issues.
Need further radiation
tolerance qualifications
Maintenance access issues
No voltage tuning from
remote.
Maintenance access issues.
Need linear regulator.
No voltage tuning from
remote.
Moderate radiation
QUARTIC/GASTOF's
regulator +-12V issues
Lowest module cost.
High cable cost.
Need linear regulator.
No voltage tuning from
remote.
Little or no radiation or
access issue.
QUARTIC/GASTOF's
regulator +-12V issues






TBD






TBD


Recommendation
• Recommend the solution with all but linear
regulators in the counting room. Thus having
500m supply cables and linear regulators next to
the front-end
• Linear rad-hard regulators available from Cern
stores for 2V, 3.3V and +5V supplies
• Solution for +-12V for Gastof/QUARTIC is being
investigated
All supplies in counting room:
Advantages/disadvantages
•
•
•
•
Best access
Most reliable
No radiation to sensitive electronics
Uses standard non rad-tol. power modules
– cheaper, spares readily available
• Large cable cost
• Difficult to test as the EMC environment is hard to
predict
• Custom design and test of linear regulator board
• No remote adjustment of low-voltages
Local linear regulator to stabilize load
voltage
•Monitor of load current by the power supply
•Monitor of the load voltage by sense wires and
separate adc
•No remote adjustment of load voltage!
•Is that a serious problem?
Cable bundle, one station = two
pockets+Quartic/Gastof
Quartic/Gastof regulators for +-12V
• Radhard LHC4913/7913 from Cern stores
not suitable for +-12V
• Intersil HS-117, +12V 1.2A
– Constructed with the Intersil dielectrically
isolated Rad Hard Silicon Gate (RSG) process
– rad-hard to 3kGy, latch-up immune
– Test report: http://www.intersil.com/military/HS-117RH_SEE_Test_Report.pdf
• Still missing -12V candidate devices
Test of solution 3)
Goal:
Setup to validate supply over 500m. This requires construction of a PCB with a couple of
LHC4913/7913 regulators.
I assume we can
•borrow the necessary power supplies from either wiener or caen.
•use the same cable to evaluate the temperature monitor system, but again we need to
borrow the module from CAEN/Wiener
•use the same cable to test HV supply for Si tracker but not for Quartic/Gastof.
Ideally we should also test the rad-hard version of +-12V regulators for quartic/gastof but I
guess it may be hard to get samples , otherwise we can use the non-rad hard equivalents.
Still lacking a design for -12V Q/G supply.
I don’t foresee test of Q/G HV setup. For that we would need to buy HV cable (HTC-50-2,
1300€) as we cant use the NG28
Reserve
Power Supplies: requirements
LV
HV
No. of
channels
Power budget
Power Supplies
Description of solution
Ne
ar
sta
tio
n
LV
HV
CAEN
Easy300
0
Nea
r
stati
on
Wiener
MPOD
TBD
Wiener
Maraton
Al
co
ve
Co
un
tin
g
ro
o
m
Wiener
Maraton
TBD
CAEN
Easy30
00
TBD
Cou
ntin
g
roo
m
TBD
TBD
Cable
cost
Mod
ule
cost
27k€
180k
€+
10k€
Maintenance access,
radiation and SEU issues
TBD
Maintenance access,
radiation and SEU issues.
Need further radiation
tolerance qualifications
TBD
Maintenance access issues
No voltage tuning from
remote.
TBD
Maintenance access issues.
Need linear regulator.
No voltage tuning from
remote.
Radiation field is unclear.
QUARTIC/GASTOF's +12V issues
TBD
Lowest module cost.
High cable cost.
Need linear regulator.
No voltage tuning from
remote.
Little or no radiation or
access issue.
QUARTIC/GASTOF's +12V issues
60k€
95k€
100k€
144k€
Notes
In tunnel, under magnets:
O(10) Gy/year
0.1 SEU/day/module
In alcoves at 200 m from IP:
0.05-0.36 Gy/year