FP420 Low and high voltage supply

FP420Low and high voltage supply

[email protected]

INFN/Univ. of Torino

July. 2008

A presentation intended to stimulate the discussion on which solution is best

Description of solution Cable cost

Module cost

Notes LV HV

Nea

r st

atio

n

CAEN Easy3000 N

ear

stat

ion

CAEN Easy3000

4*6k€ 180k€+

10k€ Maintenance access,

radiation and SEU issues

Wiener MPOD

Cou

ntin

g ro

om

TBD 4*6k€

(approx.) TBD

Maintenance access, radiation and SEU issues.

Need further radiation tolerance qualifications

Wiener Maraton

TBD 4*20k€=

80k€ TBD

Maintenance access issues No voltage tuning from

remote.

Alc

ove

Wiener Maraton

TBD 4*20k€=

80k€ TBD

Maintenance access issues. Need linear regulator. No voltage tuning from

remote. Moderate radiation QUARTIC/GASTOF's

regulator +-12V issues

Cou

ntin

g ro

om

TBD TBD 4*27k€=

108k€ 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

regulator +-12V issues

1)

3)

2)

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

MPOD LV next to cryostatMPOD HV in counting room

MPODs never radiation tested – Wieneroptimistic 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 limitedRemore control

1) Tunnel/counting room -- Wiener

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

Description of solution Cable cost

Module cost

Notes LV HV

Nea

r st

atio

n

CAEN Easy3000 N

ear

stat

ion

CAEN Easy3000

4*6k€ 180k€+

10k€ Maintenance access,

radiation and SEU issues

Wiener MPOD

Cou

ntin

g ro

om

TBD 4*6k€

(approx.) TBD

Maintenance access, radiation and SEU issues.

Need further radiation tolerance qualifications

Wiener Maraton

TBD 4*20k€=

80k€ TBD

Maintenance access issues No voltage tuning from

remote.

Alc

ove

Wiener Maraton

TBD 4*20k€=

80k€ TBD

Maintenance access issues. Need linear regulator. No voltage tuning from

remote. Moderate radiation QUARTIC/GASTOF's

regulator +-12V issues

Cou

ntin

g ro

om

TBD TBD 4*27k€=

108k€ 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

regulator +-12V issues

1)

3)

2)

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

(1): Number of individual channels per FP420 arm(2): Cable count is a multple of this number. Used to ensure each pot has its own cables(3): Diameter of one cable(4): Q/G detectors need +-12V. The LHC4913 only goes to +9V and LHC7913 to -7V, which means that it is not useful for long wire

LHC4913: Vin=3 to 12V, Vout = 1.25 to 9V, Vdropout<0.7V LHC7913: Vin=-3 to -9V, Vout -1.21 to -7V, VdropOut<0.8V(5): Change this collumn's value to explore different configurations of cable count and cable drop(6): AVDD and VDD wires share the same cable LV AVDD(Si): Low voltage Silicon detector analogue supply LV(Q/G): Low voltage Quartic/GastofLV VDD(Si): Low voltage Silicon detector digital supply HV(Q/G): High voltage Quartic/GastofHV(Si): High voltage Silicon detector

Legend and notes:

Cable usage

Channels (1)

SC

EM

Type

Area each w

ire ?

Wires per cable

Nr. of cables

Cable segm

ents (2)

Cable unit cost

Cable cost

Diam

of one cab. (3)

Current per channel

Pow

er pairs per channel

Monitor pairs per

channel

Wire resitance

Total voltage drop

Cable length

Total w

ires

Spare nr. of w

ires

Notes

mm2 CHF/m CHF mm A (5) ?/km V m

LV-AVDD(Si) 10 04.21.52.228.7 NG28 1.00 28 6.30 0.31 2 1 9.3 2.868 500 60LV-VDD(Si) 10 04.21.52.228.7 NG28 1.00 28 6.30 0.48 4 1 4.6 2.220 500 100

LV(Q/G) 6 04.21.52.228.7 NG28 1.00 28 4 1 6.30 12,600 20 2 8 1 2.3 4.625 500 108 4 (4)HV(Si) 20 04.21.52.140.4 NE26 0.50 26 2 2 5.20 5,200 16.5 0.001 1 0 37.0 0.037 500 40 12

HV(Q/G) 4 04.31.51.555.2 HTC-50-3-2 0.50 2 4 1 1.00 2,000 6 0.001 1 0 37.0 0.037 500 8 0Temperture 10 04.21.52.020.1 ND26 0.25 26 2 1 4.20 4,200 14 0.001 1 1 74.0 0.074 500 40 12

42,900 CHF 26,598 €

Cables for one arm of FP420

6 18,9002 20 8 (6)

Total cable cost per station (arm):

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 SuppliesDescription of solution

Cable cost

Module cost

NotesLV HV

Near station

CAENEasy300

0

Near

station

CAEN Easy30

0027k€

180k€+

10k€

Maintenance access, radiation and SEU issues

Wiener MPOD

Countin

g room

TBD 60k€ TBD

Maintenance access, radiation and SEU issues. Need further radiation tolerance qualifications

Wiener Maraton

TBD 95k€ TBDMaintenance access issues No voltage tuning from remote.

Alcove

Wiener Maraton

TBD 100k€ TBD

Maintenance access issues. Need linear regulator. No voltage tuning from remote. Radiation field is unclear. QUARTIC/GASTOF's +-12V issues

Counting room

TBD TBD 144k€ 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

In tunnel, under magnets:O(10) Gy/year0.1 SEU/day/module

In alcoves at 200 m from IP:0.05-0.36 Gy/year