Task #1129
openUpdated by Jin Takahashi 10 days ago
Updated by Jin Takahashi 10 days ago
- Status changed from New to In Progress
Status
Wire
| Layer | col | row | wire | status |
|---|---|---|---|---|
| 2nd | 7 | 30 | Field | Repaired |
| 2nd | 5 | 35 | Field | Pulled out the wire |
| 2nd | 35 | 35 | Field | Pulled out the wire |
| 2nd | 35 | 36 | Field | Pulled out the wire |
| 2nd | 34 | 35 | Field | Pulled out the wire |
| 4th | 7 | 11 | Field | Repaired |
| Layer | col | row | wire | status |
|---|---|---|---|---|
| 2nd | 5 | 31 | Anode | Pulled out the wire |
| 2nd | 6 | 31 | Anode | Pulled out the wire |
| 4th | 107 | 13 | Anode | Pulled out the wire |
| 4th | 10 | 13 | Anode | Pulled out the wire |
| 4th | 12 | 13 | Anode | Pulled out the wire |
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Kapton tape
2025/08/15
When we tried to replace [2nd 7-30 Field wire], the kapton tape remained on the top of the nearby feedthrough.
2025/08/25
Using dust jet & long carbon pipe, we dropped the tape down below.
The tape's current location is between 1st layer shield wires' feedthrough (col:2~5, Row:46) and Mylar just behind the wall on the short side.
Memo
We need to check if we can access the chamber from below by fishing up the chamber .
Updated by Jin Takahashi 7 days ago
2025/8/27
Wire
All the Field wires are repaired
| Layer | col | row | wire | status |
|---|---|---|---|---|
| 2nd | 7 | 30 | Field | Repaired |
| 2nd | 5 | 35 | Field | Repaired |
| 2nd | 35 | 35 | Field | Repaired |
| 2nd | 35 | 36 | Field | Repaired |
| 2nd | 34 | 35 | Field | Repaired |
| 4th | 7 | 11 | Field | Repaired |
| Layer | col | row | wire | status |
|---|---|---|---|---|
| 2nd | 5 | 31 | Anode | Pulled out the wire |
| 2nd | 6 | 31 | Anode | Pulled out the wire |
| 4th | 107 | 13 | Anode | Pulled out the wire |
| 4th | 10 | 13 | Anode | Pulled out the wire |
| 4th | 12 | 13 | Anode | Pulled out the wire |
---
Kapton tape
2025/08/25
The tape's current location is between 1st layer shield wires' feedthrough (col:2~5, Row:46) and Mylar just behind the wall on the short side.
Memo
Discussions are underway regarding the work to lift the chamber around November.
Updated by Jin Takahashi 7 days ago
- Status changed from In Progress to Feedback
2025/8/29
All the wires are repaired (6 field wires, 5 anode wires)
| Layer | col | row | wire | status |
|---|---|---|---|---|
| 2nd | 7 | 30 | Field | |
| 2nd | 5 | 35 | Field | |
| 2nd | 35 | 35 | Field | |
| 2nd | 35 | 36 | Field | |
| 2nd | 34 | 35 | Field | |
| 4th | 7 | 11 | Field | Repaired |
| 2nd | 5 | 31 | Anode | |
| 2nd | 6 | 31 | Anode | |
| 4th | 107 | 13 | Anode | |
| 4th | 10 | 13 | Anode | |
| 4th | 12 | 13 | Anode |
---
Kapton tape
2025/08/25
The tape's current location is between 1st layer shield wires' feedthrough (col:2~5, Row:46) and Mylar just behind the wall on the short side.
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EDC Frame Reassemble
The handle section that's lifted by the crane cannot be tightened with a bolt . The screw hole (just one hole) is likely damaged.
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Low Voltage Test
From the CAEN Mod SY403 (ch2), apply V_set; 1V, I_set 1 uA to field wire.
Results: The anode wire was grounded, and the field wire maintained a uniform voltage of 4.21V. The current value was 10nA or less.
Updated by Jin Takahashi 3 days ago
Low Voltage Test
2025/09/02
From the CAEN Mod SY403 (ch2), apply V_set; 1V, I_set 1 uA (->current limit) to field wire.
Results:
CAEN Mod SY403 Monitored Value:V = 3.40V, I = 0.00 uA
I test all the field wires(UU' and VV').
The tester measured the potential difference between the ground and field wires(UU' and VV'), revealing a uniform 4.2 V applied.
Updated by Jin Takahashi 2 days ago
Low Voltage Test
2025/09/03
From the CAEN Mod SY403 (ch2), apply V_set; 100 V , I_set 1 uA (->current limit) to field wire.
Results:
CAEN Mod SY403 Monitored Value:V = 102.8 V, I = 0.00 uA
To prevent tripping when current flows, apply 50 V and check the voltage near the repaired field wires (4th 7-11, 2nd 5-35, 2nd 7-30, 2nd 35-35, 2nd 35-36, 2nd 34-35).
All the wires were at 47V, just like the other wires.
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EDC Frame Reassemble
2025/09/03
All bolts were properly tightened.
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