# Presentation: 367785

## CSC Mechanics and Electronics

**Paul O’Connor**
**Tom Muller**
**BNL**
- May 22, 2003

## CSCs are the forward precision muon system of ATLAS

- 32 four-layer chambers
- 2.0 < || < 2.7
- |Z| ~ 7m, 1 < r < 2 m
- 4 gas gaps per chamber
- 31,000 channels

- IP

**Notes:**
CSC has 25% of the muon acceptance of ATLAS.
Chambers come in two shapes in staggered arrangement around inner radius of the “small wheel”.
Old 8-layer configuration shown. For cost reasons this has been staged and a 4-layer system will be installed in the initial detector – one chamber of each type. 

## Mechanics:
32 chambers
Gas system
Electronics enclosure
HV power
Electronics
On-detector: 
32 x 5 = 160 sets of ASM boards
160 x 3 = 480 optical links
LV power & cooling
Calibration system
Off-detector:
16 RODs
TTC, trigger/DAQ interface
Software

**32 chambers**
**Gas system**
**Electronics enclosure**
**HV power**
**Electronics**
**On-detector: **
**32 x 5 = 160 sets of ASM boards**
**160 x 3 = 480 optical links**
**LV power & cooling**
**Calibration system**
**Off-detector:**
**16 RODs**
**TTC, trigger/DAQ interface**
**Software**

**CSC Deliverables**

- BNL Physics Dept.

- BNL Instrumentation Div.

- UCI Physics Dept.

**Notes:**
Organized into 3 domains – strongly coupled

## Building 832 CSC Production Facility

**Lab A (main clean room) configured for:     **
**Panel epoxy operations.**
**Gas Bar and Wire Fixation Bar epoxy installations.**
**Tooling fabrications (epoxy steps).**
**Wire Winding and Epoxy setting operations.**
**Wire Spacing and Tension Tests.**
**Panel Flatness Tests ( mechanical and electrical).**
**Chamber Assembly and Electronic Flatness Tests.**
**High Voltage Cable and Connector installations.**

## Building 832 CSC Production Facility

**Lab B  ( multiple table stations ) configured for:**
**Connector and part preparations.**
**Soldering operations on Y-Y, X-X, and Y-Cover Panels**
**X-X Panel  “later steps”**
**Storage of all constructed Chambers**

## Panel Travelers – Part A

## Panel Travelers – Part B

## X-X Panel Curing

## Soldering Connectors

## X-X Panel Wire Winding

## Electronic Flatness Testing

## L-2 Ch. 10 Gap 4 

## Faraday Cage Prototype

## CSC Panel Production Rates

**CSC Panel Production Rates**

- Tooling Capacity

- 65

- 80

**S-1**

**L-2**

- 80

## CSC Parts LOB

## CSC Chamber Production Plan

**CSC Chamber Production Plan**

- 16

**S-1**

**L-2**

- 34

## CSC On-detector Electronics

- ASM1:
- Preamp/shaper

- ASM2: Analog memory, ADC & MUX

## Off detector electronics

- ROD
- prototype

- GPU

- Crate

## Status of major deliverables

**On-detector**
**3 custom ASICs ready for production**
**ASM1 board ready for production**
**ASM2 board**
**Rad-soft proto beam-tested Aug. ’02**
**Rad-hard proto in design**
**Production quantities of most components in hand**
**Cooling and calibration in design**

## Deliverables con’t.

**Off-detector**
**ROD, GPU**
**Prototypes assembled**
**Most functions have been exercised and tested**
**Design and layout seem suitable for production**
**Production quantities of most components on hand**
**Firmware development proceeds through 2003**
**Transition module**
**First proto 3Q ’02 (not full density)**
**Final version in design**
**Software in development**
**Beam test/system test scheduled for 8/03**

## On-detector electronics production

**3 BNL-designed custom ICs**
- preamp/shaper (2560), digital mux (2560), clock buffer (160)
- all Agilent 0.5um CMOS
- prototyping & procurement through MOSIS
- PRR June ’03
- P/S, MUX shared reticle production
- CK BUF – small quantity, cheapest to buy MPW overruns
**2 other custom ASICs**
- SCA, Pos. VREG
- tested and qualified elsewhere in ATLAS
- shared procurement with other ATLAS subsystems - done
**4 COTS components**
- opamp, ADC, PECL rcvr., G-link
- tested and qualified elsewhere in ATLAS
- shared procurement (opamp, ADC, PECL) with LArg – underway

- preamp/shaper production test fixture

## Milestones

| June 03 | Custom chips PRR & begin production |
| --- | --- |
| Aug 03 | Rad-hard ASM2 proto
System integration test |
| Oct 03 | ASM boards PRR & begin production
Custom chips in hand |
| Nov 03 | CSC chamber production complete
ROD PRR |
| Early 04 | Assemble & test ASM boards
Begin installing electronics on chambers |
| Late 04 | Certify CSCs, ship to CERN |

## Radiation