1. 1 Progress report on Calorimeter design comparison simulations MICE detector phone conference 2006-02-08 Rikard Sandström

2. 2 Reminder of run plan Stage 1 –Pi & Mu 100<pz<300 MeV/c Stage 6 –Mu & mu-decay 140 MeV/c 170 MeV/c 200 MeV/c 240 MeV/c Tilley’s TURTLE beam, with diffuser

3. 3 The sandwich calorimeter

4. 4 Stage 1, 100<p z <300 MeV/c Stage 1Mu, KLPi, KLMu, SWPi, SW Simulation100% Digitisation100% Fits100% RootEvent100% Neural Net 100%

5. 5 Stage 6, 140±14 MeV/c Stage 6 140 MeV/c Mu, KLBG, KLMu, SWBG, SW Simulation100% Digitisation100% Fits100% RootEvent100% (scpc75) Neural Net 100%

6. 6 Stage 6, 170±17 MeV/c Stage 6 170 MeV/c Mu, KLBG, KLMu, SWBG, SW Simulation100% Digitisation100% (scpc75) Fits100% RootEvent100% (scpc75) 100% (scpc75) Neural Net 100% 50%

7. 7 Stage 6, 200±20 MeV/c Stage 6 200 MeV/c Mu, KLBG, KLMu, SWBG, SW Simulation100% Digitisation100% (scpc75) Fits100% RootEvent100% (scpc75) 100% (scpc75) Problem! (bug 107) Neural Net0%

8. 8 Stage 6, 240±24 MeV/c Stage 6 240 MeV/c Mu, KLBG, KLMu, SWBG, SW Simulation100% Digitisation100% Problem! (bug 107) Fits100% RootEventProblem! (bug 107) Problem! (bug 107) Problem! (bug 107) 0% Neural Net0%

9. 9 Stage 6, Tilley’s TURTLE beam Had no time to work on that yet.

10. 10 Bug 107 Bug still present, still think is is compiler specific, but difficult to change compiler. No problem with an older computer -> processing files on old PC. –Tedious and time consuming but works.

11. 11 Results - Stage 1 (pi->mu excluded)

12. 12 Results - Stage 1 (pi->mu included)

13. 13 Results - Stage 6, 140 MeV/c Zoomed view next slide

14. 14 Results - Stage 6, 140 MeV/c,zoomed

15. 15 Comments, stage 6, 140 MeV/c Requirements: –Signal efficiency = 99.90% –Purity = 99.80% At 140 MeV/c, the purity of the beam (before PID) is 99.84%. –Already meeting the requirements... –All events not making sense already tagged as bad events (see my presentation at RAL Oct -05). –The intrinsic purity can get worse at higher momentum, so then PID is necessary At 99.90% signal efficiency, for SW detector background efficiency is 96.96%. That means at 99.90% signal efficiency, purity is 99.995%!.

16. 16 Summary In all cases I studied so far, Sandwich detector outshines KLOE Light. Purity is very good even before PID, partly due to that bad events are cut out of analysis.