1. RPC HV&LV status Introduction HV power supply tender
I.N.F.N. Naples
Introduction
HV power supply tender
HV cable and connectors
HV distributor and patch-panel
Costs and schedule
LV system
CMS tender, costs and schedule
Conclusions
F. Loddo2, P. Paolucci1, D. Piccolo1, A. Ranieri2
1) I.N.F.N. of Naples, 2) I.N.F.N. of Bari
11/20/2018
Pierluigi Paolucci - I.N.F.N. Naples

2. Pierluigi Paolucci - I.N.F.N. Naples
HV & LV numbers
I.N.F.N. Naples
16 LV channels HV channels
Our best
solution
2+2 LV
6 FEBs / 2 bi-gaps
6 FEBs / 2 bi-gaps
1+1 HV
2+2 LV
6 FEBs / 2 bi-gaps
6 FEBs / 2 bi-gaps
1+1 HV
2 LV
6+6+6 FEBs / 3 bi-gaps
1 HV
Reduction of
2 LV
6+6 FEBs / 2 bi-gaps
1 HV
HV 1020  480 ch
LV 1560  960 ch
2 LV
6+6 FEBs / 2 bi-gaps
1 HV
2 LV
6+6 FEBs / 2 bi-gaps
1 HV
wheel 1 2 3 4 5
TOT
gaps
408
2040 HV 96
480
FEBs
936
4680 LV
192
960
CHAMBER option
1 HV channel per chamber
2 LV channels per chamber
11/20/2018
Pierluigi Paolucci - I.N.F.N. Naples

3. Pierluigi Paolucci - I.N.F.N. Naples
HV & LV schema
I.N.F.N. Naples
LV ch.
480
LV baords 60
EASY 20
HV ch.
960
HV boards 80 12
Control Room
SY1527 HV
distributor
HV-EASY HV
distributor
HV-EASY
Detector 3 4
RPC LV
RPC LV 2 5 1 6 12 7 11 8
RPC LV
RPC LV 10 9
HV small cable
LV cable
HV big cable
panel HV
panel HV
11/20/2018
Pierluigi Paolucci - I.N.F.N. Naples

4. HV connections schema
I.N.F.N. Naples
11/20/2018

5. Pierluigi Paolucci - I.N.F.N. Naples
LV connections schema
I.N.F.N. Naples
60 LV boards placed in
20 crates (1 per balcony)
Power consumption:
board (12 ch.)  116 W
crate (3 boards.)  350 W
wheel (4 crates)  1.4 KW
Total  7.0 KW
11/20/2018
Pierluigi Paolucci - I.N.F.N. Naples

6. Pierluigi Paolucci - I.N.F.N. Naples
HV: where we are
I.N.F.N. Naples
High Voltage:
The power supply tender has been assigned to the CAEN;
A complete prototype will be delivered in Sept 04 and will be test in Naples using the RB3 chamber that is working in Naples in the cosmic test station.
The” small” quadrupolar cables (from chamber
to patch panel) have been delivered at CERN;
The “big” multi-conductors cables tender has
to be redone as soon as possible;
The tripolar and coaxial connectors have been
delivered to Naples;
A first HV distributor prototype has
been build in Naples. Now is under test;
A first HV patch panel is almost ready;
11/20/2018
Pierluigi Paolucci - I.N.F.N. Naples

7. HV distributor and patch panel
I.N.F.N. Naples
Patch Panel
11/20/2018
Pierluigi Paolucci - I.N.F.N. Naples

8. Pierluigi Paolucci - I.N.F.N. Naples
HV & LV cable drawings
I.N.F.N. Naples
11/20/2018
Pierluigi Paolucci - I.N.F.N. Naples

9. Pierluigi Paolucci - I.N.F.N. Naples
LV: where we are
I.N.F.N. Naples
Low Voltage:
The power supply quotation inquiry made by CERN for CMS will be ready in a few weeks;
A LV PS prototype will be delivered in July 04 and will be tested in Naples;
The power supply will be ordered in Sept 04 and delivered from Dec 04 to Dec 05;
The cables have been delivered at CERN;
The connectors will be ordered in June;
The cable production will be done at the ISR when the cable length list will be officially published by the DT-RPC team (CERN-TO-PD-NA)
11/20/2018
Pierluigi Paolucci - I.N.F.N. Naples

10. HV and LV cost estimation 2003
I.N.F.N. Naples
The total costs of the systems are calculated using a spreadsheet having as inputs the following items:
number of: connectors, cables, patch panels, boards, crates, controllers and mainframes
cable length and installation costs
cost of each of those items
GRI may 03 slide
We have used the following prices (Euro): 3500 HV board,
2500 LV boards, 1500 crates, 3500 branch contr, 10K mainframe.
Tot (HV control room)
CORE is  900 FS or 600 K€
11/20/2018
Pierluigi Paolucci - I.N.F.N. Naples

11. HV and LV cost estimation 2003
I.N.F.N. Naples

12. Pierluigi Paolucci - I.N.F.N. Naples
Budget & Costs
I.N.F.N. Naples
A “reduced” HV and LV systems have been designed for budget limitation:
HV: from 1020 to 480 ch.  80 boards  12 crates;
LV: from 1560 to 720 ch.  60 boards  20 crates
High Voltage
2003 estimated cost  400/450 K€
already paid  €
to complete  100 K€
Low Voltage
2003 estimated cost  200/250 K€
already paid  10 K€
to complete  240 K€
80 boards
Tot: 506 K€
Extra: 50 K€
Tot: 250 K€
No Extra
11/20/2018
Pierluigi Paolucci - I.N.F.N. Naples

13. Pierluigi Paolucci - I.N.F.N. Naples
HV & LV detailed costs
I.N.F.N. Naples
11/20/2018
Pierluigi Paolucci - I.N.F.N. Naples

14. Pierluigi Paolucci - I.N.F.N. Naples
Conclusions I
I.N.F.N. Naples
The intermediate solution (80 boards  one channel per chamber) has been chosen for the HV system in order:
Prevent the ground loop for the RB3 & RB4 chambers;
Have independent voltage on every chamber.
The HV tender has been assigned to the CAEN:
HV board: € (2003)  3500 €;
EASY crate: 1000 € (2003)  950 €;
Branch Ctrl: 1000 € (2003)  850 €;
SY1527: € (2003)  8500 €;
There is an extra cost of about 50 K€
The LV PS costs are known: No reductions
The cost of the system is 250 K€  No extra costs
11/20/2018
Pierluigi Paolucci - I.N.F.N. Naples

15. Pierluigi Paolucci - I.N.F.N. Naples
Conclusions II
I.N.F.N. Naples
450 K€ has been assigned in the 2003:
422 K€ has been already spent in the 2003;
Extra cost of about 50 K€ is needed to complete the system;
We are still working on the cable construction and installation;
The LV delivery will begin in the second part of the 2004:
No reduction in the LV PS price (CERN tender);
The cable construction will be done at ISR.
150 K€ are sub-judice in the 2004
Total extra cost of both the system is 200 K€
11/20/2018
Pierluigi Paolucci - I.N.F.N. Naples