# Presentation: 906147

## DØ  PMG AgendaMay 17, 2001

**Overview (Weerts)**
**Detector status**
**Level 2 trigger (Varelas)**
**Level 1 and Level 3 trigger (Blazey)**

- If time permits:

**Financial status **
**Milestones**

## SMT status

- Was a matter of connecting (access)
- &
- commissioning

|  | SE | SW | NE | NW |
| --- | --- | --- | --- | --- |
| 50 conductors | done | done | done | done |
| 80 conductors | done | done | done | done |
| Adaptor cards | done | done | done | done |
| Interface cards | done | done | done | done |
| Detectors connected | done | done | done | done |
| Powered up | yes | yes | yes | yes |
| Results with beam | yes | - | - | - |

- SMT in quadrants; 228 detectors/quadrant

- 100% of SMT hooked up !!!

- Expect 90% working by end of shutdown

## SMT readout front end system status

| Description | # need | # have | Location |
| --- | --- | --- | --- |
| HDI with SVX | - | - | in SMT |
| 8’ Low mass cables & clock cables | 720
192H | 757
232H | SMT support cylinder to CC face (DONE) |
| Adapter card | 144*4 | 144*4 | Installed on CC face (DONE) |
| 19’-30’ High Mass Cable; 3M/80 Conductor & clock cables | 144*4 | 144*4 | ~144*4 installed (DONE) |
| Interface card | 144 | 144 | (DONE) |
| 25’ High Mass; 3M/50 Conductor | 144*4 | 144*4 | To sequencer;  4* 144 (DONE) |

## Fiber Tracker & Preshowers

**Fiber Tracker & Preshowers**

**Waveguide Production and QC done**
**All waveguides, incl. FPS installed & tested ***( during shutdown)*
**Need 99 VLPC cassettes**

- # 99 was installed yesterday

- DONE

- ( Hallelujah !!)

- Thanks to G.Ginther & Lab 3 crew

## Fiber tracker readout front end system status

| Description | # need | # ready/ installed | Location |
| --- | --- | --- | --- |
| Waveguides from CFT (axial & stereo), CPS, FPS | - | CFT & CPS DONE | From face of CC to platform  |
| VLPC cassettes | 99 | 99 | platform |
| AFE 8  with 8 MCM’s; readout axials & stereo | 136* incr. | 10 proto problem | On VLPC cassettes |
| MCM; multichip module with SIFT & SVX chip | 1832 ( have 2200) | 1856 (working) | On AFE xx boards |
| AFE 12 read out stereo, CPS, FPS | 62*  | Progress design | On VLPC cassettes |
| Mixer boards (trig) | 20 | 1 stuffed testing | Mostly firmware |
| Digital part (trig) | 40 | 40  | platform |

*** Increase # AFE8; decrease #AFE12 to minimally readout CFT, CPS.  Delay FPS (AFE12).**

## Tracking Electronics
Analog Front End (AFE8) boards
Remade the PCB’s (146)( second set)
PCB’s completed in April by SANMINA
Gave go ahead for stuffing to SANMINA on April 19th
Delays in their engineering department
Expect production to start after Memorial Day( takes about 5 days)
First boards at DØ ~ June 15.
Testing effort is being set up ( 10 people committed)
Are reading out CFT
Stereo boards ( 4 cassettes)  tracking results ( 4096 fibers)**
Installed 6 AFE8 prototype boards; communicating with them; started to read out

**Analog Front End (AFE8) boards**
**Remade the PCB’s (146)( second set)**
**PCB’s completed in April by SANMINA**
**Gave go ahead for stuffing to SANMINA on April 19****th**
**Delays in their engineering department**
**Expect production to start after Memorial Day( takes about 5 days)**
**First boards at DØ ~ June 15.**
**Testing effort is being set up**** ( 10 people committed)**
**Are reading out CFT**
**Stereo boards ( 4 cassettes) ******** tracking results ( 4096 fibers)********
**Installed 6 AFE8 prototype boards; communicating with them; started to read out**

**Fiber Tracker; Electronics**

- Schedule for AFE8:

- Installation of first batch in July

- Need access

****** 3072 axial, 512 stereo CFT, 512 axial CPS

## Alignment results from one store

- Overall status & very brief summary:

- Reconstructed tracks in SMT
- Reconstructed tracks in CFT
- Reconstructed tracks in both together
- Use ideal geometry
- Use real geometry ( include all surveys, CMM’s etc.)   things improve a bit

- Limitations:

- No B-field  mostly low momentum tracks; multiple scattering

- Preliminary Results:

- Internal alignment of CFT & SMT accurate to better than **70********m**
- Alignment between CFT & SMT accurate to better than **70********m**

- Pretty impressive !!
-  CMM’s & surveys paid off !

## Status Overview; Electronics

**Electronics**
**Calorimeter (ECS,CC,ECN,ICD)**
- All preamps (55K) and ADC’s installed
- BLS:
- All boards done; repairing
- CC, ECS,ECN installed (2x4x96)
- 0.25% bad channels (!)
*ICD installed during shutdown*
- ICD read out most by May 21
- Level 1 calorimeter trigger to <0.8
- Summers for EC’s being fixed now
- Most of them in by Monday
**Muon**
- Forward all (pixels & MDT’s) done and commissioning
- Pixels all LED calibrated
- Central muon.
- PDT: 90 out of 94 powered up; ~60 read out
- Scintillators all up & working
- All 3 gas systems recirculating & cleaning

## Trigger Status

**Separate talks by Blazey & Varelas**

## The SIFT chip replacement

- History:

- 8 Multichip modules (MCM) on each AFE8 board
- Each MCM contains a SIFT chip (trigger pick off) and SVX2 chip ( precision readout)
- The current MCM does not work at 132nsec.    need to replace

- Solution up to now:

- Design new “drop in” replacement SIFT chip
- Remove old SIFT chip
- Put new one in place (wirebond)
- Do it at SiDet
- (uncertainties in this process)

- Unknown risks

- Potential new (& better) solution:

- Use components of SVX4 *( being developed at FNAL: pipeline & preamp)*
- Use commercial FADC
- New package will replace whole MCM  (no more SIFT or SVX2)
- Less risky

- This is current status & in flux

## Summary

**All detectors hooked up (SMT, CAL,ICD, MUON)**
**Things remaining for completion:**
**Fiber Tracker Electronics (AFE) waiting for boards to come;  critical & defines access**
**Trigger:  more detail next **
**Milestones at end; if time**

## Level 3 overview

**o o o**

**o o o**

**o o o**

**o o o**

**VRC**

**  ****(1 of 8)**

**VBD**

**VBD**

**VBD**

**o  o  o**

**VBD**

**VBD**

**VBD**

**o  o  o**

**ETG**

**Data Collection Paths (8 * 2 * 48 MB/s)**

**Primary Fiber Paths**
**(8 * 100 MB/s)**

**L3 data distribution**
** ****to Level 3 farm**

**event tag path**

**Level 1,2**
**Trigger Info**