Schedule after Shutdown Pixel Status in RUN13 and Schedule after Shutdown 10th Jun 2013

Pixel Operation Status in RUN13 Leak problem was found at top section of barrel 1 on 29th Apr. Stoped the cooling for this section. Decided to operate remained ladders since current for LV and HV looked normal for remained ladders after the leak. Behavior of several ladders became unstable after 29th Apr. Hit disappeared and several hot pixels appeared during run. We did replacement of FEM module, switch the FEM slots, reinitialize of chips and LV recycling but they not fixed the issue. Now investigating for this issues.

Hot Dead Map from RUN386773(3/10) to RUN398149(6/10) Sensor 3 Sensor 2 Sensor 1 Sensor 0 Chip 3 Chip 2 Chip 1 Chip 0 Normal Powered off B1 Ladder 5 – Ladder 9 Hot B1-L4-S Dead Known dead Chip ID = Layer*5*4*4 + Ladder*4*4 + sensor*4 + chip B1: Ladder 0 – Ladder 4 B0 : Ladder 0 – Ladder 4 B0-L2-S, B0-L3-N/S, B0-L4-N/S RUN ID 3/10 6/10 Leak problem was found for B1 top (manifold for ladder5 – ladder9) 4/29

Summary Table of Unstable Sensor Modules Unstable half ladders (magenta circled area in previous slide) : B0-L2-S, B0-L3-N/S, B0-L4-N/S and B1-L4-S. Those six half ladders became unstable after leak problem of Barrel1 (ladder5 – ladder9). Failed to initialization of readout chip. Now investigating Barrel Ladder N/S Sensor Rate (%) 2 S 91 3 N 90 1 89 88 4 84 92

Repair Status Ladder Encapsulation Location Status Arrival at BNL 18 Y Test O.K. 19 To be tested 21 22 9 N HAYASHI Encapsulating 6/19 – 22 23 25 RIKEN 7/10 – 13 26 Testing 12 Wiring 7/24 – 27 27 28 8/7 – 10 29 31 8/21 – 24 33 14 8/28 – 31

Two ladders that were installed in EAST 6 Ladders at Chemistry Lab Repaired Ladders Two ladders that were installed in EAST

Schedule Assembly of B0 and B1 can be started middle of Aug and Sep, respectively. Attaching of manifold. Pressure test. Electrical test without Big Wheel. Mating of B0 and B1 can be started end of Sep (after finishing of installation of B1). After mating, final test will be done with Big Wheel.

RIKEN side BNL side Man Power Hisayuki Torii (RIKEN) Takayuki Sumita (RIKEN) Testing and shipping of repair ladder. BNL side Taebong Moon (Yonsei Uni.) Hiroshi Nakagomi (Tsukuba Uni.) Hidemitsu Asano (Kyoto Uni.) Maki Kurosawa (RBRC) Testing, assembly, etc.

Back Up Slids

B0 Ladder0-4 (NORTH) 4/29 Leak was found Leak Current (uA) Date

B0 Ladder0-4 (SOUTH) 4/29 Leak was found Leak Current (uA) Date

B1 Ladder0-4 (NORTH) 4/29 Leak was found Leak Current (uA) Date

B1 Ladder5-9 (NORTH) Powered OFF 4/29 Leak was found Leak Current (uA) Date

B1 Ladder0-4 (SOUTH) 4/29 Leak was found Leak Current (uA) Date

B1 Ladder5-9 (SOUTH) Powered OFF 4/29 Leak was found Leak Current (uA) Date

WEST EAST B3-L11 B3-L12 B2-L7 B1-L8 B1-L9 B1-L10 Power off B0-L4 B0-L5

Hit Map of RUN386733-0000.PRDFF (9th Mar 2013)

Hit Map of RUN386733-0000.PRDFF (9th Mar 2013)

Hit Map of RUN394406-0126.PRDFF (10th May 2013)

Hit Map of RUN394406-0126.PRDFF (10th May 2013) Powered OFF