QC6: Quantitative Test and Certification3

Ext. Barrel Module IFA035 - DAQ Run Number =1558

 

- DAMAGED FIBER: We have found some damaged fibers. Three fibers (cells A16, B15 and D_6) had a crack inside the fiber. Another fiber (cell A14) had a little crack too into the aspirine tube. And we found a bad fiber (it gave us less signal) in cell D_6(fiber 5). All af them were replaced using spare ones.

 

TileRow

Drop Before Repairing

Drop After Repairing

PMT 41 - Cell A16 - Fiber# 22

2

34.5%

<20%

PMT 22 - Cell A14 - Fiber# 17

3

24.8%

<20%

PMT 43 - Cell B15 - Fiber# 27

4

28.1%

<20%

PMT 43 - Cell B15 - Fiber# 27

6

29.0%

<20%

PMT 38 - Cell D_6 - Fiber# 5

8

21.4%

<20%

PMT 38 - Cell D_6 - Fiber# 5

10

22.2%

<20%

PMT 37 - Cell D_6 - Fiber# 60

9

28.3%

<20%

PMT 37 - Cell D_6 - Fiber# 60

11

23.1%

<20%

-COUPLING REPAIRED: Some profile were extracted and put them again. The drops after this operation are below the 20% threshold. - Drops Recovered.

 

TileRow

Drop Before Repairing

Drop After Repairing

PMT 42 - Cell A16 - Fiber# 29

2

21.1%

<20%

PMT 16 - Cell B12 - Fiber# 11

4

21.2%

<20%

PMT 16 - Cell B12 - Fiber# 11

6

21.1%

<20%

PMT 38 - Cell D_6 - Fiber# 16

8

21.5%

<20%

PMT 38 - Cell D_6 - Fiber# 20

8

23.7%

<20%

PMT 17 - Cell D_5 - Fiber# 34

8

23.1%

<20%

PMT 37 - Cell D_6 - Fiber# 50

10

20.9%

<20%

PMT 17 - Cell D_5 - Fiber# 19

10

20.7%

<20%

PMT 17 - Cell D_5 - Fiber# 55

10

22.8%

<20%

PMT 37 - Cell D_6 - Fiber# 28

11

100%

<20%

PMT 4 - Cell D_4 - Fiber# 10

11

24.0%

<20%

Files: raw_run1550.hbook - hist_run1550.ps - hist_run1558.ps - raw_run1558.hbook - OPTICAL PROBLEMS RUN1550.txt - OPTICAL PROBLEMS RUN1558.txt

Olga Norniella (onorni@ifae.es)

Carmen Iglesias (iglesias@ifae.es)

Ilya Korolkov (korolkov@ifae.es)