PEANUT Nagoya 2006/12/08 M. Komatsu

Scanning trials Feb : BL039,040,041,050,052,060 –PL1 and 2 scanned with S-UTS prototype. –SFT matching has done. But we faced alignment problem by corner for Scan Back with plate changer system. March 2006 : BL112,118,BF021 –PL1 and 2 scanned with S-UTS prototype as same as previous trial. –X-ray mark alignment perfectly work! Special thanks to Gina and Byron June, July 2006 : SFT prediction by UTS scanning –PL1 and 2 was scanned based on SFT predictions. –S-UTS was not available due to fabrication of new track recognition hardware.

March trial X-ray guided alignment S-UTS scanning with limited angular acceptance <0.15 SFT matching has done –BL118 = 799 tracks, BL112 = 506 tracks and BF021 = 402 tracks –Select interesting events by SFT eye check. 14 triggers and 15 tracks selected. –3 neutrino interactions located

PEANUT BL118 –Brick assemble : Nov./25/2005 –Beam exposure : Nov./25/2005-Feb./28/2006 –X-ray marking : Mar./15/2006 –De-packing : –Arrival from Fermilab : Mar./20/2006 –Develop : Mar./20/2006 –Doublet film scan : Mar./21 (20hour by S-UTS) –CS emulation by SFT matching : Mar./22 –Track follow trial : Mar./22 –Location trial : Mar./23

X-ray Generator X-ray mark exposure bench 1m Exposure time : 5 sec Angle : 4.8 degree

X-ray Fermilab We brought X-ray exposure bench to Fermilab X-ray generator X-ray slit 50  m wide PEANUT brick X-ray slit

CS emulation (SFT matching) S-UTS(UTS unit) scanning –tan(  )<0.15, 100cm 2 x 2 film = 20hour –matched tracks are tagged in 2mm, 40mrad mm rad

Scanning using X-ray X-ray Brick Intersection of two planes (X-ray) defines a reference line in the Brick. Reference Point X-ray

Scan Back Result EventSelection category SFT matching at pl01-02SFT Matching at pl03 Scan Back Result Note dxdydtxdtydtxdty BL Multi Penetrated BL Multi Stop at pl45Neutrino Int. Cand. BL Multi Penetrated BL Multi Penetrated BL Multi Stop at pl37Neutrino Int. Cand. BF Multi Penetrated BF Kink PenetratedKink BF Kink PenetratedKink BF Multi Penetrated BF Multi Penetrated Measured at pl02 1st 2nd Fukuda

Scan Back Result ( continued ) EventSelection category SFT matching at pl01-02SFT Matching at pl03 Scan Back Result Note dxdydtxdtydtxdty BL BL Multi Penetrated same event BL Multi Penetrated BL Multi Stop at pl43Neutrino Int. Cand. BL Multi Penetrated 3rd

SFT tagged event for trial BL118 S-UTS – SFT agreement  X=-285  m,  Y=196  m  x=6.8mrad,  y=-1.5mrad

Event BL SB track Looking SFT hits, two tracks are exist. (-0.043, 0.028) =(#1,#0) SB track (-0.408,-0.449) =(#2,#1) (2,1) 0(0,1) 1(1,0 ) Pb 2nd 15/May/2006

Event BL Looking SFT hits Surely interaction but too many hits. (0.123,0.048) =(#0,#1) SB track 0 2 SB track 1(0,2 ) Pb 3rd 17/May/2006

SFT based UTS trial BL118 –428 tracks are selected for UTS scanning. Require multi 3D tracks trigger. –124 tracks found by UTS. –50 triggers are selected by SFT eye check. Plate changer based scan back was applied for 50 candidate tracks –18 tracks stopped in BL118 brick. These are sent to vertex confirmation process.

Stop Event list (06,7/4) BL pl43 BL pl45 BL pl37 BL pl26 BL pl23 BL pl16 BL pl37 BL pl14 BL pl06 BL pl23 Interaction in emulsion layer Stopped plateRun Event VTX confirmation sample in this time We have another 8 stop tracks, not summarized in this slides

Process of Vertex confirmation ① Pick up stop Event ② General scan at stopped plate ③ Pick up partner track candidates ④ Virtual erasing ⑤ Parent search ← not yet tried in this report ⑥ Penetrate check ⑦ Follow down ⑧ SFT matching (only PEANUT)

X projection Y projection U projection Stop at pl06 edge out at pl16 Stop at pl06 edge out at pl15 Scan back track

X projection Y projection U projection Scan back track

X projection Y projection U projection Scan back track Stop at pl24

X projection Y projection U projection Scan back track edge out at pl16

X projection Y projection U projection Scan back track

Summary Limited angle scan < 0.15 (Feb. 2006) –BL039,040,041,050,052,060 –Brick-SFT matching performed Limited angle scan < 0.15 (Mar. 2006) –BL112,118,BF021 (100cm 2 scan) –15 trk(14 trigger) selected by SFT eye check –3 interactions and 2 kinks confirmed in bricks UTS based predicted scan (June,July 2006) –BL112,118 –Multi 3D track triggers for UTS scanning( CHORUS like ). 124 tracks found and 50 tracks are selected by SFT eye check to follow up by Plate Changer System. –5 confirmed(Multi track) int. and 12 stops. Full angle scanning with SUTS (Oct. -> ) –BL040,BL052,BL064,BF021 –Under study. (Pilot scan back, 1 multi track event is seen in BF021)

BL040 PL1-2 Alignment in MINOS hallAlignment in Transportation 8 x 7 cm 2 SUTS scan

BL040 PL1-2 After virtual erase

BL040 PL1-2 Peak 2 Peak 1

BL040 PL1-2 Peak 1Peak 2