# Presentation: 171270

## Stato di CDF

- 12 Settembre 2005
- Luciano Ristori

## Highlights

- Run IIb upgrades completi all’85%
- Completamento previsto nella prima parte del 2006
- SVT Upgrade 2/3 completo e operativo
- Nuovo record di luminosita’: 1.4 E32 (4 Agosto)
- 1 fb-1 su nastro (10 Settembre)
- Il rivelatore e’ stabile e funziona bene
- Software di ricostruzione e’ stabile
- La latenza tra la presa dati e la disponibilita’ dei dati processati per l’analisi e’ stata ridotta a ~ 6 settimane
- Shutdown rimandato al 2006 (date ancora incerte)
- Gli istogrammi accumulano statistica...

## Data Taking Efficiencies

- Initial Luminosity (1030 cm-1s-1)           Data Taking Efficiency

**83%**

**Notes:**
Data taking efficiency is a good measure of how well the CDF experiment is operating.
Our goal is to operate consistently at high efficiency.
~5% deadtime in triggers over the duration of a store is an explicit choice we made.
In FY05, some of inefficiency is due to Run IIb trigger and DAQ commissioning.
About 85% of upgrade projects are operational now.

## Data for Physics

## Data Reconstruction

- Recently achieved 6 week turn-around time between data taking and availability of physics-quality data with final calibrations.
- This reduced resource needs (person and computing).
- Reconstruction algorithms are stable since January 2005.
- Incorporated Run II detector upgrades.
- No major changes anticipated in the future.

## Projected Peak Luminosity

- On the path to 8 fb-1 integrated luminosity in 2009

## First e-cooling demonstration – 07/15/05

- Pbar beam: 63.5e10
- Barrier-bucket bunched.
- Bunch length 1.7-us
- Tr. emittance (95%,n) kept at 4-pi mm-mrad
- Electron beam current: 200 mA
- Traces are 15 min apart

## La Sfida di CDF

- Continuare la presa dati fino al 2009
- Sopravvivere alla alta luminosita’
- Sopravvivere all’esodo verso LHC

## Run IIb Project Status

- Trigger and DAQ Upgrades
- Level-1 Track Trigger (XFT):
- Add *z* (stereo) info for 3D tracking - In production
- COT TDC modification to achieve L2 rate of 1000 Hz (readout time)
- 12 out of 20 crates are operational.
- Level 2 decision system: faster,flexible - operational since April 2005
- Level 2 Silicon Vertex Trigger (SVT)
- Faster - 3 step upgrade: the first 2 steps are operational.
- Event Builder: operational since August 2005
- Level-3 Computer
- 1st procurement placed(64 PCs) - replace current system in Nov’05
- 2nd procurement ready(64 PCs) - complete ~Jan.06
- Data Logging (20 MB/s  60 MB/s)
- 1st step operational (~35MB/s), complete by end of 2005

**Installation & commissioning parasitically without interrupting operations.**

## Run IIb Project Status

- Detector (Calorimeter) Upgrades
- Central Preshower upgrade
- Replacing with a finer segmentation system for higher lum.
- operational since early 2005
- Electromagnetic Timing
- New system for cosmic ray rejection
- operational since early 2005
- Run IIb Status
- The project is ~85% complete and operational.
- 100% by early 2006.
- commissioned without interrupting operations.

## Silicon Detectors

- Radiation damage
- > 90% of total radiation is due to collisions: NIM A514, 188-193 (2003)
- Bias voltage scans as luminosity accumulates
- Study collected charge (hits on tracks) and mean noise
- Measurements agree with predictions up to 1 fb-1.
- Efforts to increase the Silicon lifetime
- Lowered Silicon operating temp. gradually from -6oC to -10oC.
- Thermally isolated SVX from COT inert regions such that the silicon can be kept cold during COT work.

**Lifetime    0           10 fb****-1          ****20 fb****-1****      30 fb****-1****       40 fb****-1**

**8 fb****-1**

**Predicted Silicon Lifetime  **(note the large uncertainties)

**Notes:**
Depletion (bias) voltage evolves under irradiation.

## DAQ / Trigger Specifications

|  | Run IIa Specification | Run IIa Achieved (typical) | Run IIb Specification |
| --- | --- | --- | --- |
| Peak Luminosity | 0.9 x 1032 | 0.9 x 1032 | 3.0 x 1032 |
| L1 Accept | 45 kHz | 25 kHz  | 30 kHz |
| L2 Accept | 300 Hz | 350 Hz | 1000 Hz |
| L3 Accept | 75 Hz | 80 Hz | 100 Hz |
|      Data Logging | 20 MB/s | 20 MB/s | 60 MB/s |
| Deadtime Trigger | 5% | 5% | 10% |

## Extrapolation of Trigger Rates

**a highly non-linear behavior**

- Level-2 high pT electron                Level-2 high pT muon

- (0.6 < || < 1.1)

**~1% bandwidth at 3 x 10****32**** cm****-2****s****-1**

**~50% bandwidth at 3 x 10****32**** cm****-2****s****-1**

- Bunch-by-bunch luminosity gives a better lever arm for the extrapolation.

**Notes:**
3E32 --> 1kHz L2 Bandwidth --> 3.3 microbarn
2E32 --> 1kHz L2 Bandwidth --> 5 microbarn
1E32 --> 1kHz L2 Bandwidth --> 10 microbarn

## Example of planned improvements: XFT upgrade

- Confirmation of XFT tracks by stereo layers is expected to yield a substantial reduction of fakes

## Straw Trigger Table - Projected L2 Rates

## Straw Trigger Table - Projected L2 Rates

- ~75% of bandwidth at 3x1032 cm-2s-1
- No room for B & some of new phenomena

- ~30% of bandwidth at 3x1032 cm-2s-1
- Studying further improvement

- Triggers for W, Z, Top, WH, ZH, HWW, SUSY (partial), LED, Z’

- without XFT upgrade                                   with XFT upgrade

## Typical Projected Store Evolution

## CDF  FTEs  (the Exodus)

|  | 2005 | 2006 | 2007 | 2008 | 2009 |
| --- | --- | --- | --- | --- | --- |
| US | 195
100% | 178
91% | 145
74% | 102
52% | 77
40% |
| Foreign | 112
100% | 96
85% | 76
68% | 48
42% | 35
31% |
| Total
 | 307
100% | 274
89% | 221
72% | 150
49% | 112
36% |

- Results from a recent survey among CDF institutions