tariq j. solaija, ncp forward rpc edr, tariq solaija forward rpc edr 10. 10. 2002 the standard rpc...

Tariq J. Solaija, NCP

Forward RPC EDR, Tariq Solaija Forward RPC EDR 10. 10. 2002

The Standard RPC for low The Standard RPC for low regions regions

Tariq J. Solaija

National Centre for Physics

Islamabad, Pakistan

Forward RPC EDR, Tariq Solaija

• RE */2,*/3 layout & dimensions• Required materials & cost estimates• Assembly procedures• Prototyping• Production plans• Available resources

• Manpower• Equipment• Budget allocation

• Quality Assurance• FEB production & testing•Summary


CMS SEGMENTATION


Station 2 YE/-1


RE */1

RE */2 RE */2

RE */3 RE */3

20 sector of station 2, 3 & 4


RE */2 dimensionsRE */2 dimensions


RE */3 dimensionsRE */3 dimensions


Panel & frame


RE 2/2 frame


RE 2/2 partsRE 2/2 parts


Frame profile


Assembled Sandwich


RE 2/2 complete assemblyRE 2/2 complete assembly


Main RPC materials for RE */2, */3Main RPC materials for RE */2, */3

1 ) Pet insulation sheet 250 micron 05

2 ) Copper sheets 250 micron 02

3 ) Fr4 sheet for strips 200 micron 01

4) Bakelite gaps 03

5) Al foil 500 micron 01

6) Al frame ( series 5000 ) 01

7) Signal cables 50 meter roll

8) Front end boards 03

9) Gas connectors (6 mm internal dia.) 04

10) Polyurethane filled panel with Al skin 01

11) H.V connector 01

12) Double sided sticking tape 15 meter

13) Al bars, screws, internal gas pipes, H.V and ground cables etc.


Cost estimates for materialsCost estimates for materials

Description Qty/Ch Approx.total for

432chambers

EstimatedcostCHF/unit

EstimatedCost (CHF)for 432chambers

PET Sheet 5 6480 m2 11.46/ m2 74260Copper Clad glassfiber for Strips

1 1296 m2 100/ m2 129600

Aluminum Foil 1 1296 m2 10.50/ m2 13608Aluminum AlloyFor chamber frame

1 4320 kg 6/kg 25920

Copper foil 2 2592 m2 34.50 89424Front End Boards 3 1296 170/board 220320Gas connectors 4 1728 4.7/piece 8122Gas Pipes 5 meter 2160 1.2/meter 2592Polyeuorthene panelWith Al skin

1 1296 m2 170/panel 73440

High VoltageConnectors

1 432 15/piece 6480

Ground cable 1 1296 m 2/meter 2592High Voltage Cable 3 1296 m 1.2/meter 1555Double-sidedSticking Tape

1 6480 m 0.25/meter 1620

Aluminium bars 5 2160 m 1.5/meter 3240Patch board 3 1296 20/piece 25920Strip signal cable 50 meter 21600 01/meter 21600Cooling pipe 6 meter 2592 meter 2.8/meter 7258Cooling connector 4 1728 5/piece 8640Copper plate forcooling

3 1296 5/piece 6480

26 pin powerconnector

1 432 12/piece 5184

40 pin connectorscable mount

6 2592 0.27/piece 700

40 pin connectorspanel mount

6 2592 0.48/piece 2544

50 pin strip signalconnectors

6 2592 5.2/piece 13478

FEB cover 3 1296 1.2/piece 1555M5, M6 screws 100 43200 0.06/piece 2592Patch panel forconnectors

2 864 1.2/piece 1037

26 way flat cable 2 meter 864meter 8.00/meter 6912Gaps BE PROVIDED BY KOREA40 way Flat cable 5 meter 2160 meter 10.43/meter 22529


Chamber assembly ProcedureChamber assembly Procedure

1. Put the gaps with already made H.V and ground

connections on the assembly table.

2. Put the aluminum frame on the assembly table.

The frame encircles a slightly raised trapezoidal

platform.

3. Mount external H.V and gas connections on the

frame.

4. Place the 7 mm thick polyurethane filled panel on

the assembly table on the raised platform. The

top as well as bottom sides of the panel are

already glued to 500 micron thin Aluminum foil.

5. Paste 250 micron mylar sheet on the panel.


6. Paste the large gap on the mylar sheet using double stick 6. Paste the large gap on the mylar sheet using double stick

tape. H.V connection is kept on the bottom side.tape. H.V connection is kept on the bottom side.

7. Place the etched strip sheet on the gap.7. Place the etched strip sheet on the gap.

8. Put mylar sheets cut to the size of two top gaps on the 8. Put mylar sheets cut to the size of two top gaps on the

strips.strips.

9. Place the two gas gaps at appropriate position keeping 9. Place the two gas gaps at appropriate position keeping

the ground connections at bottom and H.V connection at the ground connections at bottom and H.V connection at

top.top.

10. Paste mylar sheet on the top gaps.10. Paste mylar sheet on the top gaps.

11. Put copper foil on the mylar sheet. This copper foil acts 11. Put copper foil on the mylar sheet. This copper foil acts

as signal ground and is offset inward by 15 mm.as signal ground and is offset inward by 15 mm.

12. Make coaxial cable connections to the signal strips and 12. Make coaxial cable connections to the signal strips and

ground, ground,

13. Place 500 micron Aluminum foil on the top.13. Place 500 micron Aluminum foil on the top.

14. Place Aluminum bars on aluminum foil.14. Place Aluminum bars on aluminum foil.

Assembly Procedure - II


15. Raise the Aluminum frame to accommodate the assembled 15. Raise the Aluminum frame to accommodate the assembled sandwich.sandwich.

16. Put the assembled sandwich on a plane table.16. Put the assembled sandwich on a plane table.

17. Make internal gas connections.17. Make internal gas connections.

18. Complete the external H.V and ground connections.18. Complete the external H.V and ground connections.

19. Place the frame lid at the top and screw it to the bottom 19. Place the frame lid at the top and screw it to the bottom frame.frame.

20. Mount FEB shielding covers on top panels and attach 20. Mount FEB shielding covers on top panels and attach cooling pipe with it.cooling pipe with it.

21. Mount FEB on the chamber and connect cables to the 21. Mount FEB on the chamber and connect cables to the FEBs.FEBs.

Assembly Procedure - III


PrototypingPrototyping

• PK-01/99 400*400 mm2 double gap RPC, Italian bakelite 1999.

• PK-02/00Full-size RE 2/2 chamber, tested at GIF in 2000, phenolic bakelite gaps fabricated in Italy ( 10 9 cm).

• PK-03/01Full-size RE 2/2 chamber, tested at GIF in 2001, melaminic bakelite gaps ( 10 10 cm).

• PK-04/02Full-size RE 2/2, tested at GIF in 2002, gaps supplied from Korea ( 10 10 cm).

Good results were achieved in all beam tests.


RE 2/2 under test at GIFRE 2/2 under test at GIF


Production PlansProduction PlansProduction PlansProduction Plans

• First low chambers installation RE+2 11/04• Chambers should be ready 3 months before the installation.• 72 chambers to be shipped from Pakistan 04/04• Arrival in Geneva expected in 06/04• Chamber tests prior to installation: 07/04• Gas gaps delivery from Korea 03/03• Procurement of materials should start 11/02

Material procurement in Pakistan takes time:Typical Order – Delivery delay ~ 4 – 6 months


Production plansProduction plans

•Time T0 is assumed to be arrival of gaps from Korea.

• We hope to produce 3 to 4 chambers / week.

• Production of 432 chambers would take 108 to 162 weeks after time T0.


Available resourcesAvailable resources

• Manpower:• Physicists: 06• Engineers05• Technicians 08

• Space:• Site – A Electronics testing Lab. 600 sq. ft• Site – B Chamber integration & testing shop 1000 sq. ft• Site – C Mechanical assembly shop 4000 sq. ft

Total available space for RPC 5600 sq.ft (600 sq. m)


Budget estimates & spending profileBudget estimates & spending profile

• Cost per chamber: 1350 CHF• Cost per FEB:200 CHF

• Financial year 2002-2003,1500 FEBs:300000 CHF

• Financial year 2003-2004,1500 FEBs:300000 CHF

• Production of 216 chambers 2003-2004:291600 CHF

• Production of 216 chambers 2004-2005:291600 CHF


Q. A. & Proposed Chamber Tests

Current vs HV of gaps before assembly

Gas leakage testTests on gapsTests on gaps

Tests for ChamberTests for Chamber Gas Flow and leakage Test

Current vs HV

Singles rate

Cosmic Ray test


Front end boardFront end board

• RPC Endcap group uses the 32 channel board designed by INFN (Bari).

• 50 boards in final configuration have been fabricated and used during the beam tests by Korea, China and Pakistan in 2002 . •3000 boards will be fabricated in bulk. Different board manufactures can produce these boards in two to four month period.


Front-End Board for End-cap RPC

8-ch ASIC

Signal Input

LV Component Side

Solder Side

Signal Output


Proposed FEB TestingProposed FEB Testing

Input pulse

Threshold

FEB Rx. board

TDC

All channels are simultaneously pulsed and TDC hits are checked against three threshold levels 100,150 and 200 mV. Input pulse level is varied during the test. TDC can also record inter channel delay.

Trigger


Chamber assembly areaChamber assembly area


Chamber testing areaChamber testing area


Chamber testing electronicsChamber testing electronics


Gas mixing rackGas mixing rack


• Chamber design for stations RE */2 & RE */3 is ready and good results have been achieved in beam tests.

• Most of the resources & equipment is available to start chamber production.However, some tooling can only be designed and produced after EDR. Materials can also be ordered in bulk after EDR approval.

• Work on automatic 32 channel FEB testing program is in progress.FEB production in bulk can be ordered if satisfactory results are obtained in 2002 beam tests completed recently, the data is being analyzed.

SummarySummary

tariq j. solaija, ncp forward rpc edr, tariq solaija forward rpc edr 10. 10. 2002 the standard rpc...

Documents

dimensionsforward rpc

partsforward rpc edr

materialsforward rpc

tariq solaijare

tariq solaijastation

tariq solaija6

tariq solaijacost estimates

assembly table