Technical Review of BaBar Improvement Plans

[Committee members] [Charge] [Background material] [Agenda]

• Murdock (Gil) Gilchriese, LBNL -- Chair
• Chris Bebek, LBNL
• Janet Carter, Cambridge
• Francois Etienne, CNRS IN2P3
• Maurice Garcia-Sciveres, LBNL
• John Harvey, CERN
• Matthias Kasemann, Fermilab
• Kay Konigsmann, Univ. Freiburg
• Dan Marlow, Princeton Univ.
• Rinaldo Santonico, Sezione di Roma dell'INFN
• Marjorie Shapiro, LBNL
• Torre Wenaus, Brookhaven

PEP-II typically runs at nearly two-thirds of its design peak luminosity of 3x1033, and due to higher-than-design PEP-II/BaBar efficiencies has produced daily luminosities as high as 150 pb-1, actually surpassing the design value of 135 pb-1. Plans are in place to increase the peak luminosity to 1 x1034 by the end of 2002. To take advantage of this luminosity increase and to fix some minor problems in the original design, some improvements are needed to BaBar. A major component of these improvements is the computing power and disk space needed to process, store, and analyze the bonanza of events.

We ask you to evaluate the adequacy of our plans for items to be completed by the end of 2003, and comment on the credibility of the projected costs. In particular:

• Comment on computing model:
• Has the proper tradeoff between amount (cost) of offline computing hardware and ease and speed of performing various physics analyses been taken?
• Is the model of how data is staged from tape to disk realistic?
• Evaluate the feasibility of locating a significant fraction of the computing at European centers for use by the full collaboration.
• Evaluate the Instrumented Flux Return (IFR) improvements.
• Evaluate the plans for the trigger, particularly the rejection rates for the L1 z trigger
• Comment on plans for upgrading the front end electronics and DAQ for the various detector components.
• Comment on plans for R&D on detector aging and performance improvements including IFR efficiency, drift chamber aging, DIRC photomultiplier frosting.
• Comment on schedule for replacing SVT modules and on the radiation damage tests and on the schedule of R+D for a later replacement of the SVT.

• PEP-II.
• Trigger and data acquisition.
• Computing.
• Drift chamber (Dch).
• DIRC.
• Electromagnetic calorimeter (Emc).
• Silicon vertex tracker (Svt).
• Instrumented flux return (Ifr).
• Physics analysis.

Wednesday, October 11

Plenary Session -- Orange Room

08:00	Executive Session

09:20	PEP II Status and Plans		                     J.  Seeman

09:40	BABAR Status & Overview of Hardware Improvements     S.  Smith

10:10   Break

10:25   Trigger/Data Acquisition Overview W.  Innes
 
10:40   Computing/Software Status and Improvement Plans	     C.  Young

                                
Parallel Sessions on Detector and Computing:

 A. DETECTOR -- Orange Room
11:15     SVT         C. Campagnari
11:45     IFR [1,2]   H. Band, C. Sciacca   
12:20     DCH         M. Kelsey

12:45 Lunch

13:30	  DIRC        A. Hoecker 

13:55	  EMC         H. Marsiske
14:20     TRG         Su Dong
14:40     DAQ         C. O'Grady
14:55     Online/Level 3     R. Bartoldus
15:05     Discussions with Various Detector Systems
17:00 	  Executive Session
18:00     Committee/BABAR Discussion
 	

 B. COMPUTING -- Pom/Flora
11:15     Computing/Anal. Model   G.Dubois-Felsmann
12:00     Online                  S. Luitz
12:15     MC Production           A. Ryd 

12:45 Lunch
	
13:30     Tour of SCS             R. Mount
14:00     Computing at Data Centers and Univ. Sites
	                          S. Gowdy
14:40     Data Distribution       A. Hasan
15:00     User Perspective        J. Olsen
15:15     Technology and Costs    R. Mount
15:30	  Cost and Schedule       C. Young
16:00	  Discussions 
17:00 	  Executive Session
18:00	  Committee/BABAR Discussion
 
19:30  	  Dinner