power supply planning for upgrade ot scintillating fibre wilco vink on behalf of the scifi group 19...

Power supply planning for upgrade

OT Scintillating Fibre

Wilco VinkOn behalf of the SciFi group

19 May 2014

OT Wiener Maraton systems◦72 outputs * 300W = 21.6kW◦6 power boxes,12 channels per power box

Wiener output max 8v/50A◦But: 1v margin needed for cable voltage

drop (25m+25m)◦Currently configured Vout = 7V, voltage at

front end +/- 6VDetector power for 432 front-end boxes

+ controls: 11kW

LV Power supplies

Wilco Vink 219 May 2014

Wilco Vink 319 May 2014

LV distr box1

LV distr box2

LV distr box2

LV distr box1

FE Boxes

6 rectifiers and controllers

6 power bins in bunker below trackers3 C-side3 A-side

ShieldingWall

FE Boxes

FE BoxesFE Boxes

Low voltage cabling

TO each C-frame12 35 mm2

Thick cables to detector distribution box◦25m*2 35mm2 for 27A

For upgrade up to 45A

Thin cables from distribution box to FE-modules/ROB◦8m*2 2.5mm2◦9 FE-modules 6 ROB

Same supply cabling for upgrade

Wilco Vink 419 May 2014

Wiener1: +6V/45AWiener2: +6V/45AWiener3: +6V/45AWiener4: +6V/45A

Wiener5: +6V/45AWiener6: +6V/45AWiener7: +6V/45AWiener7: +6V/45A

12 Cframes

LV distribution boxes

FEASTMP DC-DC convertersPower requirements not yet all

known, expected to have more details from test results Q3/Q4 2014◦ Test of PACIFIC2 with analog and

digital circuits second half of this year

◦ Microsemi FPGA, proto boards planned for Q4 2014.

Upgrade FE consumption

Wilco Vink 519 May 2014

Cern DC-DC converter◦ Specifications

Vin=5-12V Vout=0.6-5V Iout<=4A frequency=1.8 MHz

Power supplies needed for front-end modules◦ 1.2v:

GBT-SCA Microsemi FPGA core voltage

◦ 1.5v: GBT 1.5V Microsemi FPGA PACIFIC

◦ 2.5v: LD VTTX 2V / 0.15 A TIA VTRx 2V / 0.1 A Microsemi FPGA 2.5V / 0.5A ,

4*= 2A

Per ROB worst case, not all front-end boxes will be equipped with all data GBT’s transmitters◦ PACIFIC/Microsemi FPGA unknown (??W)◦ 16 GBTx 1.5V/728mA (~17.5W)◦ 16+1 LD 2.5V/0.15A (~6.4W)◦ 1 TIA 2.5V/0.1A (0.25W)◦ 2+8 SCA 1.2V 0.1A (0.12W)◦ 2 Master GBT chipset : 2W (4W)

Total per ROB: (28W + unknown)DC/DC FEASTMP converters efficiency ~75%

Upgrade FE consumption

Wilco Vink 619 May 2014

Reuse the OT Maratons Additional Wiener

power boxes in tunnel◦ Extra Maraton systems◦ Extra thick supply wires

from power box in bunker to LV-distribution box on detector

◦ New distribution box (no of connections and only positive voltages)

Upgrade of the LV

Wilco Vink 719 May 2014

CEAN experiment multichannel system SY1527LC

HV supply boards: A1833BPLC, double width, using 28 HV channels with positive polarity

Cabling:◦ 48 long-distance multi-wire

cables◦ 12 Cframes x 4

cables/Cframe◦ from Patch panels in D3 to

the C-frames are connected to the HV power supplies by means of two junction boxes, one per detector side(located: D3-D03)

OT HV power supplies and distribution

Wilco Vink 819 May 2014

Most of this not usable for SciFi!

100v Max. required◦ 50mV resolution

30V for KETEK SiPM 65V for Hamamatsu

Total number of HV channels:◦ 288 Read Out Boxes * 16 SiPM’s◦ Share a HV line per 4 SiPM’s (1152 HV channels)

Assuming: sufficient current available good uniformity among SiPM array Vbd good temperature uniformity

Ordered for SiPM test @ EPFL◦ Caen 32 10mA channels, per module◦ 8 modules per crate 10mA per output

Planned for the final system 15mA / channel

HV for upgrade

Wilco Vink 919 May 2014

Guido Haefeli (EPFL) looking into HV system for SiPMs

LV supplies◦We can reuse the Wiener Maraton power supplies

(assuming maintenance contract ok!) Re-configure the Negative output to positive

◦We need additional power supplies and cabling◦Voltage drop over thick cables will increase with

higher currents less margin◦Q3/Q4 2014 will give us a better view of total power

HV supplies◦OT HV modules not usable for upgrade (mainframe?)◦ (re)use of cabling needs further study

Conclusion

Wilco Vink 1019 May 2014