1. Accelerators and other things Roger Barlow Manchester Christmas Meeting 2005/6

2. Roger Barlow2 Accelerators: PEPII and TURTLE Poster at PAC05 Where do BaBar backgrounds come from?

3. Roger Barlow3 Wake Fields Beam particles passing through an aperture produce image charges and currents Image charges and currents push beam particles around Big concern for Linear Collider

4. Roger Barlow4 Wake fields Predict experimental results if 5 th order used

5. Roger Barlow5 More Wake Fields Circular Aperture:Kick on one particle due to another  (  m r m r’ m W m (s)Cos m  -  ’  ) Wake effect can be coded as  m (trailing particle)xAperture(s)x(Leading slice) What about rectangular aperture??

6. Roger Barlow6 BaBar splitoff software Try out simple implementation of Debbie Bard’s photon/splitoff Neural Net discriminator All cluster-pair masses (E>0.5 GeV) and those for which either has quality<0.5

7. Roger Barlow7 BaBar analysis  ±  3  ±  0 over to Tim – who promised a talk!

8. Roger Barlow8 BaBar Grid - utilities Wrapper for unmemorable ldap bash-2.05b$ BbgWho Names of BaBar VO members =========================== Artem Trunov Walter Toki Dr J A Nash Dominique Boutigny … bash-2.05b$ BbgWhere List of all sites available to the BaBar VO ====================================== gridce.sns.it: with 10 CPUs available gridba2.ba.infn.it: with 88 CPUs available ce3.egee.unile.it: with 3 CPUs available Grid10.fe.infn.it: with 20 CPUs available lcg-gridka-ce.fzk.de: with 1145 CPUs available ……………..

9. Roger Barlow9 BbgCERNUI Sets up the user interface even in a grid-free environment (e.g.SLAC) [noric08]~/analysis25 > grid-proxy-init grid-proxy-init: Command not found. [noric08]~/analysis25 > source BbgUtils/BbgCERNUI your operating system is sl3 your shell is tcsh [noric08]~/analysis25 > grid-proxy-init Your identity: /O=Grid/O=UKHEP/OU=hep.man.ac.uk/CN=Roger Barlow Enter GRID pass phrase for this identity:

10. Roger Barlow10 BaBar+Grid Idiot-proofing James’ easyroot: analysis of TauUser ntuples using the local BaBar farm via the grid We have disk space and CPUs and the knowledge and the need…

11. Roger Barlow11 BaBar Statistics As of Dec 05 - joint convenor of BaBar Statistics Working Group (with Ilya Narsky). Rôle in encouraging good practice

12. Roger Barlow12 Asymmetric Errors Shows bias resulting from combination of 2 typical asymmetric (Poisson) results using 8 different methods ‘Standard’ method is clearly not the best See PHYSTAT05

13. Roger Barlow13  ln L=- 1 / 2 ? Error estimates for a lifetime measurement from a small number of results Solid line is correct. Dashed line is usual. Dotted is Bartlett Approximation

14. Roger Barlow14 Coverage… How I spent the Xmas break.. To appear in PHYSTAT05 proceedings

15. Roger Barlow15 CALICE R and D towards a very high granularity Silicon/Tungsten ECAL for the Linear Collider Also HCAL designs being considered Very nice detector Mainstream design Manchester in at the start

16. Roger Barlow16 Bid to PPARC Went to PPARC in February Asked for £2.5M over the next 3 years for 5 workpackages Iterations between committees Emerge with delayed scheme costing £2.7M over the next 4 years EuDet makes up a lot of the shortfall

17. Roger Barlow17 Workpackage 4: Thermal+Mechanical Manchester with Roger Barlow in charge Work with École Polytechnique (and Lyon?) Glue studies (literature + ageing). Radiation? Thermal simulations – need information on design details Thermal measurements to validate simulations + cooling design Assembly robot: pattern recognition and placing for 24,000,000 pads

18. Roger Barlow18 In the UK CALICE project we WP4, the Thermal and Mechanical Work Package, and part of WP2, the DAQ package. TaskPeopleDeliverableDateProgress/remarks Glue studiesRay Julian Report on glue availability and characteristics Xmas Glue AgingRay Julian Andy Report on aging properties found using thermal cycling in programmable oven First results by Xmas, final by summer 06 Prototype assembly procedures Ray Julian Demonstrations 2006 Heat flow simulation StevePlotsSome by Xmas, more in 2006 Awaiting data on what to simulate Thermal Measurements MikeMeasurements to confirm simulations 2006 Assembly Robot Design Ray Julian Design and prototypesometime?What does the collaboration want? Networking Studies Marc Richard Studies of online to offline switch performance 2006/7 Acquiring new Virtex-4 based card Complete FPGA firmware MarcUpdated program allowing full use of memory SpringNeeded for CERN testbeam run CoolingRayDesign(s)2006/7

19. Roger Barlow19 CALICE - Mechanical Work started (Ray Thompson, Julian Freestone) Literature being looked at Glue currently used is Epotech E4110 (used by GLAST) Thermal Cycling: we have the programmable oven

20. Roger Barlow20 HEPP+EPS Finished term as IoP HEPP group chair 3 good conferences (Durham, Birmingham, Dublin) Started new no-losers HEPP prize for Particle Physics Re-started Newsletter (help from Christina) Vibrant series of half day conferences (including Manchester last November) EPS conference HEPP2007 on the way

21. Roger Barlow21 Next Year The mixture as before plus: Accelerator projects: Super B, ATF2, FFAG Statistics: BaBar SWG + Banff workshop. Asymmetric Errors CALICE: Get busy (+ Dave Bailey) BaBar Grid: now in demand