2007/7/111 Pair Monitor studies K.Ito (Tohoku University) 2007/7/11.

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Presentation transcript:

2007/7/111 Pair Monitor studies K.Ito (Tohoku University) 2007/7/11

2 Striped pattern There is no striped pattern when the scatter plot was drawn in large canvas.

2007/7/113 Jupiter Pair monitor has been installed in Jupiter. –J4IRPM (gray) –J4IRPMSensor (yellow) –J4IRPMSensorSD –J4IRPMSensorHit Beam pipe CH 2 Mask BCAL Pair monitor Silicon (0.2mm) Air (5mm)

2007/7/114 Satellites Finished installing pair monitor in Satellites. –S4PMExacthit –S4PMMCTruth –S4PMMCTruthBuf Hit information. –trackID, motherTrackID, pdgCode, charge, position, momentum, totalEnergy, energyDeposit.

2007/7/115 Bugs of Jupiter !? Z=+400 : OK Z=-400 : Holes have been made contrary to expectation. injection extraction 1.0cm1.8cm Z = +400cm injectionextraction 1.8cm!!! 1.0cm!!! Z = -400cm X Z IP Z = +400cm Z = -400cm Gun 10GeV muon beam at random from IP to pair monitor. Extraction hole!!

2007/7/116 Cause of bugs bugs OK Z Z X X

2007/7/117 Bug fixes Hole : OK Another bug has broken out. –Gap between BCAL and QC1. Z=-450cm Z=+450cm gap Z=+450 QC1 BCAL hole Z=-450 BCAL QC1 hole Beam line Checking… BCAL QC1

2007/7/118 Test on bug fixed version. (there is gap between BCAL and QC1) Gun 10GeV muon beam at random from IP to BCAL. Hole : OK. Z = +430cm Z = -430cm Extraction hole

2007/7/119 Measurement of vertical displacements Z Y e - beam e + beam +Δy+Δy -Δy-Δy Pair monitor e+ scattered in upper and lower asymmetry.

2007/7/1110 Simulation by Saigo-san (Tohoku) in 2002 Bunch size : 243nm/3.0nm/110μm Crossing angle : 6mrad Pair monitor : 176cm Solenoid field (no anti-DID) Measurable up to Δ y =0.3σ y Beam size

2007/7/1111 Simulation with new parameter (only 6 bunches) projection 5<R<91.8<R<3 Black : nominal Red : Δ y =2σ y 0 Assign to D-region. Assign to U-region.

2007/7/1112 R=N U /N D ×σy0×σy0 Beam size Displacement △ y ×σy0×σy0 ×σy×σy absolute relative Relative displacement △ y ×σy0×σy0 ×σy0×σy0 ×σy0×σy0 Relative displacement can be measured!?