# Presentation: 701176

## ATLAS UpgradeIntroduction

- January 2008

##  SLHC Topics Not in This Talk

- The physics case for the SLHC
- See eg. _[http://arxiv.org/abs/hep-ph/0204087v1](http://arxiv.org/abs/hep-ph/0204087v1)_
- I would find it interesting to have (not so urgent) a local appraisal of the physics case
- Technical issues related to how LHC luminosity is increased to reach SLHC luminosity of 1035
- Upgrades to
- Calorimetry
- Muons
- Trigger, DAQ or computing
- Details of tracking upgrade

## LHC Luminosity??

- Year ? (present schedule)         2008                 2009            2009-2010         > 2010
-  Ldt ?  (guess)                 up to 100 pb-1      1-few fb-1        O(10 fb-1)       O(100 fb-1)

| Parameter | Phase A | Phase B | Phase C | Nominal |
| --- | --- | --- | --- | --- |
| k / no. bunches | 43-156 | 936 | 2808 | 2808 |
| Bunch spacing (ns) | 2021-566 | 75 | 25 | 25 |
| N (1011 protons) | 0.4-0.9 | 0.4-0.9 | 0.5 | 1.15 |
| Crossing angle(rad) | 0 | 250 | 280 | 280 |
| */*nom) | 2 |  | 1 | 1 |
| * (m, IR1&5) | 32 | 22 | 16 | 16 |
| L (cm-2s-1) | 6x1030-1032 | 1032-1033 | (1-2)x1033 | 1034 |

- Optimistic...

## Integrated Luminosity vs Time????

- L=1035

- ????

- Later ????

- 300 fb-1

- 3000 fb-1

## Monetary Scope – ATLAS/CMS

- Pixel Cost:	32.5 – 34.0 MCHF
- SS+LS:                              105            MCHF  (20 MCHF Assembly)
- Installation:                          10             MCHF  (Mostly ID)
- Shielding Upgrade:                 5              MCHF
- LAr Calorimeter:	25.5           MCHF
- Tile Calorimeter:	            10            MCHF
- Muons:		2            MCHF
- Trigger/DAQ:                        10            MCHF
- Electronics:               (in the systems)
- Total Cost:                     175-210  	       MCHF

- ATLAS

- CMS

- EU accounting....

## US Costs

- Estimate made for P5/DoE some time ago. _All _US SLHC costs.
- This is being updated for new P5 panel now.
- A useful exercise is to compare to the _ATLAS_ silicon tracking cost for the current detector. These are project costs only. Guess SLHC.
- Shift by 10 years. Inflate(4%/yr). Scale(factor 2?)

- FY97/07

- FY07/17

- ATLAS silicon tracking only

## SLHC ID “Strawman” Layout

**R****LS2 ****= 950 cm**
**R****LS1**** = 750 cm**
**R****SS3**** = 600 cm**
**R****SS2**** = 490 cm**
**R****SS1**** = 380 cm**

**Baseline June 07**

**4 Pixel Layers (Incl. B)**
**3 Short Strip Layers**
**2 Long Strip Layers**

- Alternative layouts under study

## ATLAS SLHC Inner Detector Milestones

*ATLAS Ready for Beam SLHC**	**31/12/2015*
*ATLAS Upgrade Installation **	**    **	**1/6/2014**** 31/12/2015*
*Prepare for installation            **	**3    month*
*Installation                                **	**10    month*
*Commissioning**	**	** 3    month*
*Closing**	**	**	**2    month *
*ID  Assembly on the Surface**	**	**1/1/2013 ****  1/9/2014*
*Barrel assembly**	**	**1/1/2013**** 1/4/2014*
*EC assembly                                    **	**1/6/2013 **** 1/9/2014*
*Pixel /beam Pipe Assembly                **	**1/9/2013****  1/1/2015*
*ID Construction PRR Dates         **	**1/4/2010 **** 1/10/2013*
*Thermal Components (PRR)**	**25 /04/2010 **	*
*Support structures  (PRR)                      25/11/2010*
*Modules integration (PRR)                      21/1/2011*
*Sensors  (PRR)                                     12/7/2010*
*Readout electronics  (PRR)                     9/06/2010*
*TDR**	**	**	**	**	**    1/2/2010               *
*B-layer replacements:*
*Ready for beam:**	**	**1/1/2013*
*Beam off – decommissioning**	**7/1/2012*

- As set by ATLAS
- Upgrade management
- December 2007
- Very, very aggressive
- CMS said to be less
- aggressive....

- PRR= Production
- Readiness Review

- Note dates in
- European format!

- Note ATLAS ID TDR
- Was April 1997....

## Last Slide

- Comments
- 2010ish is seen the as time to make a decision to proceed to full-scale construction ie. know about what to build by roughly when..
- LBL led the US work on silicon tracking for the present detector
- Number of US institutions involved in SLHC silicon tracking is expected to increase significantly eg. SLAC, BNL, Penn, many others that were not involved in current silicon detector
- SLHC upgrades are very challenging technically and, if current milestones are to be met, also schedule/cost.
- “Continuous mode” for LHC/SLHC detector design or fabrication or installation from early 1990s through SLHC detector completion 2016 or later.
- Obvious difference between LHC and SLHC will be concurrent data analysis and SLHC detector design/fabrication => expand number of groups involved in ID upgrade.
- Short presentations this week on current status of local R&D and plans for forthcoming year. Issue; our future roles.