Emulsion general scan in Toho University Shogo Fukunaga

Emulsion general scan in Toho University Shogo Fukunaga

全面スキャン 概要 X-Z plane X-Y plane Y 330 mm x ・The number of fields of view (1 view: 0. 12× 0. 1 mm 2) X: 3300 Y： 4100 Total： 13. 000 ・Size of Emulsion ・E 07： 350× 350 mm 2 ・E 373: 250× 245 mm 2 330 mm emulsion 250 μm 1 Set Scan Over lap: 20 μm 120 μm Save emulsion base emulsion Z x ・X方向に駆動しながらZ方向にScan ・下がる時に画像を取得し、上がる時に保存 ・ 1 setあたり84枚の画像をScan

The scanning machine used in this study in Toho University Camera Specification XC-HR 300(sony) Frame rate 100 Hz 岐阜と同じ illumination system(LED) Luxeon 5 W (Uniopt) PC Specification Toho Gifu OS Windows 2000 professional windows 2000 CPU 1. 70 GHz 3. 00 GHz Memory 256 MB 1 GB

Test of General Scan in Toho 東邦大学の所有するスキャンシステムでも、Scanが正常に行わ れているのか以下の点で評価を行なった。 1. Saving time of acquired images 2. Relation between Scanning time and Z-coordinate in which image is acquired. 3. Relation between Scanning time and the number of acquired images in 1 set 3. Surface localization 1. Scan emulsion 2. Save

1. Saving time of acquired image by 1 Set 画像の保存時間による制限 1 Set 1. 下がりながら撮影 2. 保存しながら上がる(他に操作出来ない) 3. 座標値の読み込みながら表面認識 保存時間が撮影時間(駆動時間) を上回ると正常なScanが行われなくなる Fail to start in surface 1 set 3. Surface localization 1. Scan emulsion 2. Save 1. Scan 2. Save emulsion Can`t take images Scanning time > Saving time Scanning time < Saving time 1. Scan

1. Saving time of acquired image by 1 Set Install time(December 2011 by Mr. Kanda at Gifu University) Saving Time[sec] 1 Set Mean: 2. 22 sec 1. Scan emulsion 2. Save set Saving time = 2. 22 sec Scanning time≈3 sec Amount of time required in 1 Set： 6 Gifu Univ (2012. 9)： 2 sec

Saving time by 1 set Toho University Gifu University (Apr. 2012) Saving time[sec] 0. 72 sec 0. 38 sec Set Use LAN access to save ・Saving time 2. 22 sec changed Use external hard disk drive to save changed 0. 72 sec ・時間の不安定性は見受けられない Time by 1 Set: 1. 50[sec/set] 1 set: 1. 44 sec/set

2. Relation between Scanning time and difference in Z-coordinate in which image is acquired z dz=3 μm Scan 1. Scan emulsion 2. Save Scan 250μm Scan 84 layers emulsion base 1. Changes the value of scanning time step-by-step. 2. 画像が取得される位置の差であるdzが3μmになっているのかどうかを調べた。

2. Relation between Scanning time and difference in Z-coordinate in which image is acquired Dz[μm] 1[sec](2[sec/set]) 2[sec](4[sec/set]) 3[sec](6[sec/set]) 4 sec(8 sec/set) Z[μm] Mean: 9. 8[μm] Mean: 5. 0[μm] Mean: 3. 3[μm] Mean: 3. 0[μm] Dz[μm] ・Scanning time が変化するとdzも変化する ・Scanning time=3 sec の時が一番規定値に近い

3. The number of acquired images in 1 set Mean: 12. 3 Mean: 53. 0 Mean: 80. 9 3 sec 2 sec Scanning time: 1 sec Mean: 90. 5 4[sec] Mean: 92. 5 6[sec] ・現在の所84枚取得しているとして処理 ・Scanning time=3 secの時が一番規定値に近い。 規定値 84枚

Short Summary -Scanning time. Ideal Saving time = 0. 7 sec Scanning time ≈ 0. 7 sec(1. 5[sec/set]) しかし、 現状ではScanning time = 1 secでは画像を取得する枚数が少ない。 Scanning time = 3 sec(6[sec/set]) が安定なので、この時間でScan Gifu University: 2[sec/set] 今後Scanning time = 0. 7 sec(1. 4[sec/set]) でScanできるように改善を試みていく。

Emulsion general Scan in Toho Area: 230× 0. 8 mm 2 ・ 10 lines ・ 18926 sets Film: Emulsion of E 373 ・Module number: 87 ・Plate number: 10 Emulsion of E 373 230 mm× 0. 8 mm

取得された画像数と vertexがあると認識された画像数の比較 乾板の上部 0. 25 mm× 0. 8 mmをScan Gifu University Toho University (2012. 3~2012. 9) 3581766 0. 3% 344786 0. 6% 1769 21231 The number of acquired images/The number of extracted images[%] Toho 0. 3 Gifu 0. 6

Classification of detected events 1769 Extract images Check images Signal (candidates) Check emulsion Signal α decay Beam interaction 1 vtx Noise Closing of particle track Other noise

Classification of detected events ・Scan Area: 0. 25× 0. 8 mm 2 Signal 371 124 1 Noise 840 332 58 Signal rate: Signal Noise (The number of Signals/The number Toho(Oct. 2012) 553 1172 32. 1% Gifu(Mar. 2012~Aug. 2012) 8508 12723 40. 1%(after 2 nd process) of Extracted images)

Detected events(1 vtx)