|
The table (1) gives the mean value for
each sub-batch, without any intercalibration. Only the PMTs, which
fulfil the specifications, have been used in the calculations.
|
Sub-Batches
|
QE mean value (%)
|
|
Sub-Batch 4-1 (250 PM)
|
18,8
|
|
Sub-Batch 4-2 (250 PM)
|
19,3
|
|
Sub-Batch 4-3 (250 PM)
|
19,2
|
|
Sub-Batch 4-4 (250 PM)
|
19,1
|
|
Sub-Batch 4-5 (250 PM)
|
19,2
|
|
Full Batch
|
19,1
|
Table
1 : Quantum Efficiency mean value (%)
The distribution of the
480 nm efficiency is reported on figure (1. The rejected PMTs (all)
are quoted in red. This criterion is ok: the mean value for each
sub-batch is above 18.0% as indicated in the table (1) and no
tube has a value lower than 15%.
|
