12-nov-2003 Muon Plenary, R.Richter 1

Status of MDT elx and services

• ON-chamber– mezzanines

– ON-chamber cables

– hedgehog boards

– CSM Motherboard

– CSM Daughterboard

• OFF-chamber– LV supplies & cables

– HV supplies & cables

– Optical cables

– MROD

12-nov-2003 Muon Plenary, R.Richter 2

ON-chamber components

• mezzanines– 2000 delivered --> burn-in --> test (2 weeks)– 1000 expected this week– all components at companies– other 11000 by end of 2003– remaining 2600 early next year

• ON-chamber cables– "american" part on order– for barrel prototyping about 600 on order– for others: decision to be taken get on critical path. Price

enquiry in europe gave no big savings (A.L.)

12-nov-2003 Muon Plenary, R.Richter 3

EMS1 ON-chamber Cabling

12-nov-2003 Muon Plenary, R.Richter 4

ON-chamber components, cntd.

• CSM Motherboard– 260 ("american" part) on order

– 50 on order for barrel prototyping

– 1050 (remaining production): DR & price enquiry at CERN has been started; financing assured from C&C OK

• CSM Daughterboard (active part)– final prototype to go ut (25 pieces)

– rad. tol. tests done

– FDR under way

– GOL and TTC problems seem to be solved

– will be financed from C&C; but mind 200 kCHF limit!

12-nov-2003 Muon Plenary, R.Richter 5

OFF-chamber components

• LV supplies (A.L., M.B.)– Budget allocated by INFN (two MDTs per supply channel)

– discussion with CAEN on nov., 5th; cost offer demanded

– need 175 supplies à 15 A and 425 à 25 A

– CAEN estimates 8 months to first prototype

• LV cables (R.R.)– cost offer for 36 km demanded from LAPP-cable

• estimated: 130 kCHF, unshielded, 190 kCHF shielded

= 108 CHF resp. 158 CHF per chamber

• delivery time: 8 weeks

– proposal: take shielded cable

– how to finance? (part of chamber?, part of CSM)

12-nov-2003 Muon Plenary, R.Richter 6

LV supply architecture for MDTs

1) One or more chambers (n) may be supplied from one PS.

2) If n > 1, currents may be exchanged between chambers via the common return (s. diagram).

3) In general the current I consists of a DC-part plus a small AC admixture, CH1 being a variable load (e.g.: current may depend on the digital activity in CH1). CH2 sees a fraction of the AC-part of I1, due to the common current return path. The resistance of the return path translates into an AC voltage on the ground of CH2 caused by CH1 (and vice versa).

4) The perturbation to CH2 depends on a) amplitude and frequency of I12

b) frequency response of the amplifiers

c) thresholds of the discriminators of CH2

5) Depending on 4) there may be a) no effect

b) an increase of noise

c) a danger of oscillation of all amplifiers (in particular for large n)

What is the expected situation for the MDT and n=2 ?

CH 1

CH 2

I12(t)

I1

-I1 - I12(t)

I2

-I2 + I12(t)

PS 1 CH 1

PS 2 CH 2

I1

I2

-I1

-I2

I12 = 0

PS 1

case n = 1:

case n = 2:

12-nov-2003 Muon Plenary, R.Richter 7

Available Cable TypesLAPP-Kabel, type Ölflex C:\Atlas\www\Muon-SERVICES\Power_consumption\

cbl. type --> 105H (unshielded) 115H (unshielded) 115CH (shielded)

# of wires and Cu-

cross sect.

Cu crosssect per

current path

[mm2]

Outer diam. [mm]

Cu content[kg/km]

Weight[kg/km]

Cost/100m[Euro]

Outer diam. [mm]

Cu content[kg/km]

Weight[kg/km]

Cost/100m[Euro]

Outer diam. [mm]

Cu content[kg/km]

Weight[kg/km]

Cost/100m[Euro]

4G1.0 2 6,8 38,4 85 110,3 7,5 78,1 106 2604G1,5 3 9,4 58 144 158 7,5 58 117 150,6 8,6 100 137 2854G2,5 5 11,6 96 226 186 9,6 96 192 210,4 10,7 167 213 5264G4 8 12,8 154 296 335 11,2 154 299 363,3 11,9 237 278 5844G6 12 14,6 230 397 479 13,2 230 480 517,8 13,9 318 390 7244G10 20 20,8 384 753 707 17,2 558 710 11814G16 32 24,7 614 1040 1071 20,2 804 1050 15834G25 50 28,7 960 1509 1997 25,1 1170 1570 19764G35 70 33 1344 2060 2533 33,5 1500 2380 2332

actually payed4G4 8 12,8 154 296 173 11,9 237 278 2864G6 12 14,6 230 397 243 13,9 318 390 354

105H, unshielded

0

500

1000

1500

2000

2500

3000

0 10 20 30 40 50 60 70 80

Cu weight & cost / X-sect of curr. path

Weight [kg/km]

Cost [€/100m]

115 CH, shielded

0

500

1000

1500

2000

2500

3000

0 10 20 30 40 50 60 70 80

Cu weight & cost / X-sect of curr. path

Weight [kg/km]

Cost [€/100m]

Cost of 3 Types

0

500

1000

1500

2000

2500

3000

0 10 20 30 40 50 60 70 80

Cost / X-sect of curr. path

Cost 105 H

Cost 115 H

Cost 115 CH

Cost of 3 Types

0

200

400

600

800

1000

0 5 10 15

Cost / X-sect of curr. path

Cost 105 H

Cost 115 H

Cost 115 CH

Cost offer for 30 km arrived

3,54 €/m x 36 km= 126 k€ = 190 kCHF= 158 CHF/MDTNEW: 3,43 E/m= 155 CHF/MDT

2,4 €/m x 36 km = 86 k€ = 130 kCHF= 108 CHF/MDTNEW: 2,19 E/m

12-nov-2003 Muon Plenary, R.Richter 8

Cable Cost Offer for Quantities

• MDT/RPC 4 x 6 mm2 2,19 E/m 3,43 E/m

• RPC 4 x 25 mm2 8,72 E/m 8,96 E/m

• RPC 4 x 2,5 mm2 0,82 E/m 2,40 E/m

AWG diam Area

[mm] [mm2]

0000 11,68 107,15000 10,41 85,1100 9,37 68,960 8,25 53,461 7,35 42,432 6,55 33,683 5,83 26,734 5,20 21,215 4,63 16,846 4,13 13,367 3,67 10,618 3,27 8,429 2,92 6,68

10 2,60 5,3011 2,32 4,2112 2,06 3,3413 1,84 2,6514 1,64 2,10

12-nov-2003 Muon Plenary, R.Richter 9

OFF-chamber components, cnt'd

• HV supplies (A.L.)– Budget allocated by INFN (two multilayers per supply channel)

– discussion with CAEN on nov., 5th: general cost increase by 20% since 3 months ago (after INFN budget allocation...)

– cost offer demanded for baseline and higher modularity (12 24, 36 channels per module?)

– explore other alternatives (move HV supplies to US15?)

• HV cables– covered by INFN

– 72 km needed; Stores cost: 1 CHF/m make price enquiry

12-nov-2003 Muon Plenary, R.Richter 10

OFF-chamber components, cnt'd

• Optical Cables– funding agency not clear from MoU: is it part of CSM or part of

MROD (off chamber r/o) ?

– gold plated concept with patch panels is about 330 kCHF for 1200 chambers. All components could be ordered inside of frame contract of LHC machine with the DRAKA company

– if no patch panels needed (cables from MROD to CSM): cost about 1/3 need decision on PP and funding

12-nov-2003 Muon Plenary, R.Richter 11

Cost structure of optical fiber system with PPs [CHF]

• in-situ fiber termination is biggest cost factor; fiber is only 15% of cost

• using ducts allows to place and re-place fibers later

Cost/MDT 23 54 45 28 3 45 54 23 275

% of total 8,4% 19,6% 16,4% 10,2% 1,1% 16,4% 19,6% 8,4% 100%

Fibertermination

(fusion splice)

Fiberduct

Patchcords to

CSM

Patchcords toMROD

FibersPatch panelw. Pigtails

Patch panelw. Pigtails

MRODside

CSMside

Fibertermination

(fusion splice)

120 m

12-nov-2003 Muon Plenary, R.Richter 12

Summary

• cables on critical path for installation (ON- and off chamber)– financing– technical decisions on LV shields– technical decision on PPs for optical fibers– procuring still on schedule, but needs decisions

• decision on CSM-2– wait for 25 prototypes, test– need 2 CSMs for EI chambers