P. Paolucci - I.N.F.N. of Napoli 1RPC workshop, 2 march 07

RPC Power system

P. Paolucci, G. Polese and D. LomidzeI.N.F.N. di Napoli

P. Paolucci - I.N.F.N. of Napoli 2RPC workshop, 2 march 07

Power Sector Schematic

6 FEBs / 2 bi-gaps 6 FEBs / 2 bi-gaps

6 FEBs / 2 bi-gaps

6+6+6 FEBs / 3 bi-gaps

6 FEBs / 2 bi-gaps

1+1 HV

1+1 HV

1 HV

1 HV

2 LV

2 LV

2 LV

6+6 FEBs / 2 bi-gaps

12 LV channels 8 HV channels

6+6 FEBs / 2 bi-gaps

6+6 FEBs / 2 bi-gaps

1 HV

1 HV

2 LV

2 LV

2 LV

board channel

HV 80 480LV 60 720

P. Paolucci - I.N.F.N. of Napoli 3RPC workshop, 2 march 07

Power Wheel Schematic

Detector

1

2

12

1110 9

8

7

6

543

Control RoomSY1527

RPC LV

panel HV panel HV

RPC LV RPC LV

RPC LV

HVdistributor1 in – 2 out

HV-EASYHV

distributor1 in – 2 out

HV-EASY

P. Paolucci - I.N.F.N. of Napoli 4RPC workshop, 2 march 07

HV and LV Components

HV in control room – LV on detectorHV

1 HV channel per chamber 80 HV boards 480 channels 6 HV racks – 14 EASY crates – 2 MAOs

LV 1 analog + 1 digital LV channel per chamber 60 LV boards 760 channels 20 EASY crate on balcony – 2 crates per tower

P. Paolucci - I.N.F.N. of Napoli 5RPC workshop, 2 march 07

Project Cost

HV and LV tenders in the 2003 Cable tenders in the 2004 HV and LV connectors bought in the 2004

Hardware Equipment Cabling TOTHV 300 K€ 140 K€ 60 K€ 500 K€

LV 230 K€ 14 K€ 16 K€ 260 K€

P. Paolucci - I.N.F.N. of Napoli 6RPC workshop, 2 march 07

Power Dissipation Numbers

HV: 480 ch · 1 watt 0.5 KW

LV: 760 ch · 14 watt 10 KW

MAO: 26 ch · 2 KW 60 KWTOTAL 70 KW

about 10 €/watt

P. Paolucci - I.N.F.N. of Napoli 7RPC workshop, 2 march 07

What we learned during MTCC

1. Cabling is complex and the debug is not easy:

Lot of cables and connections (few broken)Tower are difficult to access

2. LV system worked in a stable way and without any faults

3. HV boards had instability problems related to the current monitoring (Imon)

P. Paolucci - I.N.F.N. of Napoli 8RPC workshop, 2 march 07

Imon instability in 1th MTCC period

POWER CYCLE

P. Paolucci - I.N.F.N. of Napoli 9RPC workshop, 2 march 07

HV Imon test with Resistors at 904

31 c31 c

31 c 20 c

20 c

20 c

WITH FAN UNIT

WITHOUT FAN UNIT

P. Paolucci - I.N.F.N. of Napoli 10RPC workshop, 2 march 07

BOARD 1 CH0/1 BOARD 1 CH2

BOARD 2 CH0/1 BOARD 3 CH0/1

BOARD 3 CH2 BOARD 4 CH0/1

NO FAN-31C NO FAN-31C

NO FAN-31C FAN-20C

FAN-20CFAN-20C

POWER CYCLE

B2 CHO/1

HV power cicle test with Resistors at BLG 904

P. Paolucci - I.N.F.N. of Napoli 11RPC workshop, 2 march 07

Sotware and Hardware Reset test

SW

HW

P. Paolucci - I.N.F.N. of Napoli 12RPC workshop, 2 march 07

I0set influences Imon readout

I0 changed from 800 microA to 750 microA

HV instability conclusion/news1. We were able to reproduce the instability effect at BLG 904 using

resistive charge problem is not related to the detector/cable2. Measuring independently the current on the ground wire we

understood the instability was on the monitored current (Imon) and not on the generated current.

3. The increase let us suspect to a thermal drift of some components and so we begin to use the CAEN fan unit to ventilate the boards.

4. Using the fans the board temperature went down from 31oC to 20oC and for 6 days Imon was very stable but increased on the 7th

5. The of the Imon distribution of the ventilated boards is 0.2 A and it was twice without fan.

6. Hardware power cycle of any board present in the EASY crate affect the offset of all the boards in the crate.

A new firmware from CAEN is almost readsynchronization problem have been fixed !!!No news for thermal drift

P. Paolucci - I.N.F.N. of Napoli 14RPC workshop, 2 march 07

HV & LV delivery

2 2

3

1

80

47

7 7

34 34

14 14

5

0

60 57

SY1525 A3485 -MACISTE

A3512N -HV

BC A1676 A3000 -CRATE

A3000FB- FAN

A3486S -MAO

A3009 -LV

HV-LV elements status (21 feb 07)

ordered delivered

P. Paolucci - I.N.F.N. of Napoli 15RPC workshop, 2 march 07

Components - numbers

modello ordinati consegnati mancantiSY1525 2 2 0A3485 -

MACISTE 3 1 2

A3512N - HV 80 47 33

BC A1676 7 7 0

A3000 - CRATE 34 34 0

A3000FB - FAN 14 14 0

A3486S - MAO 5 0 5

A3009 - LV 60 57 3

To modify

Late delivery

Late delivery

P. Paolucci - I.N.F.N. of Napoli 16RPC workshop, 2 march 07

• HV installation in control room (6 racks) is underway. W+1 and W+2 are OK. Local cable will be prepared and installed in March

• HV multi-conductor cables will be connected by the CPE company and tested by Napoli people starting from March the 19th.

• CAEN fixed the synchronization problems (Software) but is still working on the HV board thermal instability. Do we have to send back all the boards ?

• HV commissioning of W+1 and W+2 will begin when the cable will be ready (end of March)

• Cable connection on the feet from April (W+1 and W+2)• Full system ready for July

HV status

P. Paolucci - I.N.F.N. of Napoli 17RPC workshop, 2 march 07

HV installation in CR

12 multiconductors cable per rack (wheel) – 1 x sectorThe cable positioning is a very hard and difficult job

P. Paolucci - I.N.F.N. of Napoli 18RPC workshop, 2 march 07

HV installation in CR

6 cable per side in order to leave center accessible

P. Paolucci - I.N.F.N. of Napoli 19RPC workshop, 2 march 07

• LV system in W+1 and W+2 is OK– boards tested and cabled– local connection ready

• LV tower cabling is finished this week in W+1 and W+2, including LV trigger and MAO cables.

• LV patch pannels and distributors not ready (central CMS LV project)

• LV commissioning of W+1 and W+2 will begin in March 2007.

• Full system ready for July

LV status

ScheduleMarch April May June July August

HV deliveryMultic. Cable inst

CPE company

Tech.

Multic. Cable test

Phys. Phys.

HV commis.

MAO from CMS

W+1 W+2 W0 W-1 W-2 Full system test

LV deliveryLV commis.

MAO from CMS

W+1 W+2 W0 W-1 W-2 Full system test

MAO delivery

P. Paolucci - I.N.F.N. of Napoli 21RPC workshop, 2 march 07

• HV commissioning: G. Polese, D. Lomidze, P. Paolucci

• HV multicond. test: P. Noli, D. Lomidze• LV commissioning: G. Polese, D. Lomidze, P.

Paolucci, F. Loddo, M. Kudla• LV cable test: G. Passeggio, A. Vanzanella• HV endcap: Pakistan + ?• HV multicond. test: J. Crotty + ?• LV endcap: Pakistan + ?

People

P. Paolucci - I.N.F.N. of Napoli 22RPC workshop, 2 march 07

Conclusion

We still have few missing hardware components (tenders in the 2003 and 2004) MAOs is a real problems:

we hope to get 2 MAOs and 1 majiste for commissioning the wheel and the power systems

The CMS LV central system is not ready: feet patch panels have been mounted by us but there are still missing components balcony patch panel ? long run cables ? And patch panels connections ?

Manpower and schedule is OK in the barrel