| Status & Goal |
| LOI approved on Oct. 02 | |||
| “proceeding as rapidly as possible to a full implementation, ideally in time for Run-4” | |||
| Next Step; Conceptual Design Report | |||
| Fix design, makeup mechanical drawings etc | |||
| Homeworks (simulations); | |||
| Detailed PID scheme (M. Shimomura) | |||
| Rate estimates and triggers (K.Ozawa/S.Sato) | |||
| Effects on EMCal (S. Takagi with ??) | |||
| Which sector on the West Arm | |||
| Plan to submit CDR by Feb 03 | |||
| Aim to install the aerogel before RUN-4 | |||
| Run-4 will be the major Au-Au run at full energy | |||
| Design |
| Base of Design | |||
| Enough segmentations | |||
| Occupancy <10% | |||
| Enough # of photoelectron | |||
| At least 10 - 15 p.e. | |||
| Flat response | |||
| No dead space in between | |||
| Aerogel at the same radial location | |||
| Backgrounds; | |||
| Chrenkov emission at pmt window | |||
| Scintillation Emission? | |||
| Delta-ray? | |||
| Effects on detectors behind us; | |||
| EM-Cal | |||
| Pad Chamber | |||
| Config. with Belle-type |
| Config. with Integration-type |
| Other Configurations |
| Zolin II type | ||
| 11 x 17 | ||
| Easier preparation of aerogel | ||
| Complicated structure | ||
| Zolin III type | ||
| 22 x 11 | ||
| No cut of aerogel required | ||
| Easier structure | ||
| Should make decision on the configuration from this test run. | ||
| # of p.e. | ||
| Flatness | ||
| Timing property | ||
| Selection & Purchase of PMT |
| 3” PMT; R6233-01HA | ||
| Gain ; > 2.7 x 10**5 with 2-2-1-… bleeder at 1kV | ||
| Q.E. ; 30 % (typ.) | ||
| P.O. of 320 PMT’s submitted | ||
| @37800yen(~$315) | ||
| To be delivered by March 03. | ||
| Selection & Purchase of Aerogel |
| Hydrophobic is a “must”. | ||
| Matsushita | ||
| Index of 1.007, 1.015 & 1.020 | ||
| Index is key parameter | ||
| Still under negotiation with Matsushita for conditions | ||
| Index will be ~ 1.012 | ||
| >400 liter will be delivered before August 03. | ||
| Final cost may be significantly higher than $400/liter | ||
| Location on the West Arm |
| Enough radial space for Aerogel + TOF? | ||
| 19 inches of free space | ||
| 43 cm ? - 48.26 cm | ||
| Which Sector on the West? |
| Two possible location; | ||
| Green or blue | ||
| Which sector to be installed? |
| Vertical sector; | ||
| Mechanically Stable | ||
| Symmetric& Full acceptance for + & - charges | ||
| Maybe difficult to install | ||
| Needs to be settled at BNL with team of P.Kroon. | ||
| Photo of West arm |
| “upper limit on the depth of a new detector - 330mm is probably entirely due to the space in the towers available for insertion of the detector (if done through the tower)” | |
| “1.5m(Z) x 4.33*0.15(theta) = 1.5 x 1.5 m2” |
| Goal of this meeting |
| Make decision on the configuration! | |
| Make plan towards mass production! | |
| Make up “To do lists” for CDR with names! | |
| Have fun at party! |
| Results of 15 x 15 cell |
| Aerogel/Integ ; 12/12 cm | ||
| Normal ; 17 p.e. at center, 15 p.e. corner | ||
| Backward; 14 p.e.~ 14 p.e. | ||
| Aerogel.Integ; 12/ 9 cm | ||
| Normal; 18 p.e.(center) - 18 (3,3) | ||
| Backward; 16 p.e. ~ 14 p.e.(6,6) | ||
| Aerogel/Integ ; 9/10 cm (Small Box) | ||
| Normal; 13 p.e. ~ 12 p.e. | ||
| Backward ; -- | ||
| Aerogel/Integ; 9/9 cm | ||
| Normal ; 15 p.e. ~ 14 p.e. (x,y)=(6,6) | ||
| Backward ; -- | ||
| Aerogel/Integ; 6/9 cm | ||
| Normal ; 13 p.e. ~ 11 p.e. | ||
| Backward ; 11 p.e. ~ 10 p.e. (corner) | ||
| Zolin II |
| 11.5 (Hor) x 17 (Ver) cm | |
| Aerogel/Integ ; 11/11 cm | |
| Normal ; 18 p.e. @center ~ 18 p.e. | |
| Bacward ; 15 p.e. @center ~ 15 p.e.@(4,4.5) |
| Zolin III |
| Aerogel/Integ ; 12/9 cm | |
| 22 (Hor) x 11 (ver) cm | |
| Aerogel/Integ ; | |
| Normal ; 16 p.e.(Center) ~ 17 p.e.(Edge)~ 13 p.e.(Corner) | |
| Backward; 10 p.e. (center) ~ 10 p.e.(Corner) |
| Issues Raised |
| FEE 90 ohm impedance instead of 50 ohm | |
| Gain of pre-Amp? | |
| Do we need pre-amp really? | |
| Timing Threshold at ~1p.e.! | |
| LED pulser | |
| Aluminum Thickness ; 0.2 - 0.5 mm | |
| Structural analysis Needed! |
| Plan |
| Choose Configuration | |||
| 1st; Zolin II type | |||
| 2nd; 15 x 15 Cell | |||
| Confirm the results tomorrow | |||
| Decision before X’mass | |||
| Mechanical design | |||
| Structural analysis | |||
| Strength/Tolerance | |||
| S. Afanasiev at Dubna | |||
| First Drawings by Jan 03 | |||
| Discussion/Feedback from P. Kroon team in Jan 03. | |||
| FEE | |||
| Pre-amp? | |||
| Bleeder | |||
| Prototype Test In Jan 03 | |||
| Simulations | |||
| Detailed PID scheme (M. Shimomura) | |||
| Rate estimates and triggers (K.Ozawa/S.Sato) | |||
| Effects on EMCal (S. Takagi with ??) | |||
| Which sector on the West Arm | |||
| Mass Production |
| PMT | ||
| Calibration (Tsukuba) | ||
| Bleeder (Tsukuba) | ||
| Starting in March 03 | ||
| Aerogel | ||
| Quality Control (Tsukuba) | ||
| Partial delivery in spring | ||
| Total by Aug 03 | ||
| GORETEX Reflector | ||
| Innerbox (Tsukuba) | ||
| FEE | ||
| Tokyo CNS | ||
| Mechanical Structure | ||
| Box Construction (Dubna) | ||
| Aerogel cut ? (Dubna? KEK?) | ||
| Big structure (BNL) | ||
| Analysis | ||
| PISA routine | ||