April 10, 1996

4 QC6: Quantitative Test and Certification3

Ext. Barrel Module IFA002 - DAQ Run Number = 211

GLUED FIBERS: Fibers which cannot arrive properly to the final of the Aspirin Tube, which where cut and glued to the spare ones.

	TileRow	Drop Before Gluing	Drop After Gluing
PMT 37, Cell D6, Fiber #18	9	86.4%	45.8%
	11	86.3%	46.7%
PMT 17, Cell D5, Fiber #53	9	85.5%	36.0%
	11	86.6%	47.2%
PMT 18, Cell D5, Fiber #63	9	88.4%	40.5%
	11	88.7%	44.9%
PMT 18, Cell D5, Fiber #65	9	73.8%	32.5%
	11	75.4%	26.4%

COUPLING REPAIRED: For Cell D4 (PMT 4, TileRow 11) the fiber #7 which had 30% of Drop its profile was extracted and put it again obtaining a Drop ~0%.

PROBLEMS INDUCED BY PUTTING NEW PROFILES: New profiles to correct the B13 misrouting (PMT 24).

PMT	CELL	TileRow	Fiber #	Drop	Possible Problem
22	A14	3	5	39.8%	Coupling Related
22	A14	3	12	62.9%	Coupling Related

NEW OPTICAL PROBLEMS AFTER REPAIRING MODULE:

PMT	CELL	TileRow	Fiber #	Drop	Possible Problem
29	A15	1	28	38.9%	Coupling Related
12	A13	1	25	27.2%	Fiber Related
12	A13	3	25	24.0%	Fiber Related
38	D6	9	23	25.5%	Fiber Related
38	D6	11	23	23.8%	Fiber Related
38	D6	10	8	27.8%	Fiber Related

FIBERS NOT REPAIRED:

PMT	CELL	TileRow	Fiber #	Drop	Possible Problem
42	A16	1	47	44.4%	Fiber Related
42	A16	3	47	42.2%	Fiber Related
29	A15	1	13	19.4%	Fiber Related
29	A15	3	13	29.9%	Fiber Related
41	A13	2	35	30.9%	Fiber Related

For Cell A16 (PMT 41, TileRow 2) the fiber #28 which had ~34% of Drop its profile was extracted and put it again obtaining a Drop ~30.9%, which indicates that the Optical problem could be related to the fiber itself.

SCINTILLATORS: 2 Different set of Scintillators used on cell D6 and TileRow 10.

Files: raw_run211.hbook - hist_run13.ps - hist_run211.ps - raw_data_run211.ps - OPTICAL PROBLEMS RUN211.txt - OPTICAL PROBLEMS RUN13.txt

Josep Flix (jflix@ifae.es)

Ilya Korolkov (korolkov@ifae.es)