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6 µ µ à e ν ν µ + ( A, Z) à ν µ + (A,Z 1) µ +(A, Z) à e +(A,Z)
7 SINDRUM II µ Rext= number of proton between pulses number of proton in a pulse
8 capture in the moderator (see also Fig.3.1 and the discussion in the text). e m t 10 3 run2000 on gold SINDRUM II measurement µe2ν simulation µe simulation at B=10-11 a i a events / 100 kev t F f o 1 T ETOT (MeV) N w
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11 パイ中間子生成標的 ミューオン輸送磁石 陽子ビーム ミューオン静止標的 パイ中間子捕獲磁石 電子輸送磁石 電子 パイ中間子 ミューオン 電子検出器 - 検出器ソレノイド磁石 - ストローチューブ飛跡検出器 - LYSO カロリメーター
12 New and accelerator research facility, using MW-class high power proton beams at both 3 GeV and 30 GeV. J-PARC Tokai KEK Tsukuba
13 LINAC 400 MeV Neutrino beam to Kamioka Rapid Cycle Synchrotron Material and Life Science Facility Nuclear and Particle Physics Exp. Hall Energy : 3 GeV Repetition : 25 Hz Design Power : 1 MW Main Ring Max Energy : 30 GeV Design Power for FX : 0.75 MW Expected Power for SX : > 0.1 MW
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16 Proton beam Pion production target Radiation shield Muon beam transport solenoid Matching solenoid Capture solenoid COMET Solenoids and Detectors for the CDR version Late-arriving particle tagger Beam collimator Muon stopping target Muon target solenoid Beam blocker DIO blocker Calorimeter Tracker Detector solenoid Curved sepctrometer solenoid Figure 5.14: Present design of the solenoid channel used in the tracking studies Dipole fields for drift compensation To keep the center of the helical trajectories of the muons with reference momentum p 0 in the bending plane, a compensating vertical dipole field should be applied. The magnitude of the compensating dipole field is given by B comp = 1 ( p 0 cos θ ), (5.6) qr 2 cos θ 0
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18 δδ
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20 Switch Yard Beamline Elements A-Line B-Line Beam line component installation in progress in SY since 2014 Beam transport line in HD hall SC magnets Hall construction He compressor used for E36 will be reused for COMET Significant construction work 2016 Summer to connect SY and Hall along the B-Line 90 deg. Transport Solenoid installed in Spring 2015 COMET Hall ready in Spring 2015
21 All geometry implemented in the full simulation: ICEDUST Detector for physics measurement in Phase I CDC : the main detector of COMET Phase-I Physics Beam PSI 2015 Trigger Hodoscope Counter Scintillator + Cerenkov Analysis algorithm development in progress using simulation data. ex) track finding in CyDET Wire stringing completed in July 2016 at KEK CDC Read Out Electronics RECBE production at IHEP
22 CDC Construction COMET Phase-I Physics Main Detector Wire stringing completed in July st cosmic-ray event observed in Sep. 2016
23 Straw tracker (operational in vacuum) prototype Detector for beam BG measurement in Phase I and physics measurement in Phase II ECal (LYSO) R&D using prototypes 100 MeV electron Ecal Pile-up study using simulation data Crystal quality test bench at JINR Wave form taken in the test ß Electron beam test at ELPH Ecal PID performance evaluation at PSI 2015
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25 opportunities for cooperation with Mu2e M C C AlCap@PSI C M Dec. 13 M C M M C C M C C M COMET Mu2e
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28 DeeMe
29 DeeMe
30 Acceptance (sr/mev/c) 0.25 From a Target 40 H-port Frange GV Entrance GV Exit HS2 Entrance HS3 Entrance HSEP Entrance 0.2 HB4 Entrance HB4 Exit HQ2 Entrance Focus Momentum (MeV/c)
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