P5 recommendation on Tevatron running Report of June 8 meeting FNAL

Charges Should the Tevatron run through the end of FY09 as currently planned? What are the factors and considerations which might lead to running beyond FY09?

Run through FY09? Will the accelerator deliver interesting level of integrated luminosity? Can the detectors handle the luminosity? Do the collaborations have the people to operate the detectors and analyze the data? Subject of June 8 meeting

Running beyond FY09 What is present reach and prospect for new discoveries?  Trigger issues  Endgame strategy Battling the sqrt N barrier--will a few more fb -1 matter?

Running beyond FY09 What is present reach and prospect for new discoveries?  Trigger issues  Endgame strategy Battling the sqrt N barrier--will a few more fb -1 matter? Might know more after analyses for Summer conferences Meet again in September to consider

Accelerator projections Close to present performance Driving indicators 25 mA/hr stacking > 100 store hours per week

D0 detector performance Basically running well, producing nice results Remaining issues for 09:  Silicon radiation damage  Fiber tracker occupancy

Silicon tracker Good to go for 09

Fiber tracker Beginning of store More typical

CDF Detector Running well, producing nice results Issues  Inner silicon radiation damage  Intermediate silicon cooling problem

Silicon radiation Integrated Luminosity (fb –1 ) Depletion Voltage (V) Central Prediction +1σ Prediction –1σ Prediction maximum bias voltage Bias Scan Data Model: S. Worm, Lifetime of the CDF Run II Silicon, VERTEX 2003 SVX Layer 0 Good to go through 09

ISL cooling goodbad hole Port card cooling ring Manifold Cooling Pipes Repair in Aug with “reverse angioplasty”

D0 people power 1--needs actuals

D0 people power 2- available = 60 or

CDF people power 1--needs CY 07CY 09 Detector Ops5651 Offline2620 Algorithms3221 Management10 Total for Ops * FTE’s

CDF people power 2-- available CY 07CY 09 Service Needs Resources Available Resources for Physics 392 – 124 = 268 FTE 134 FTE 

CDF people power 3-- expertise CommittedLikelyUnknown

Findings summary Accelerator running well and will likely deliver 6-7 fb -1 by end of FY09 CDF and D0 detectors running well, some issues for 09 but no show-stoppers CDF resources matched to needs through FY09 Concerns about D0 people power in FY09 Examine case for running beyond 09 at next P5 meeting (likely end of September)

Recommendations summary Tevatron should run through end of FY09 Lab should work with D0 to augment human resources  Visitors program is highly leveraged and cost- effective  Additional Applications Physicists?