Setup for testing low mass tapes!
The low mass tapes are tested for:
The schematic view of the setup (EPS)
strip resistance (detection of line breaks; nominal resistivity ~0.1 Ohm/m (wide lines), ~1 Ohm/m (narrow lines) )
interstip resistance (detection of short-cuts between the strips; nominal resistivity > 1 G Ohm/m)
leakage current from the high voltage line-detector
bias line; expected leak of up to 100 nA @ 500 V
The measurement procedure:
The system is controlled by a custom written LabView software (screen-shot), which performs
automatic measurements and
The cable in inserted in the measurement jig .
The strip resistance is measured first for each line.
The common contact is disconnected and U=5 V is applied to every second
line on the tape (red lines)!
The interstrip resistivity is measured by the voltage drop on shunt resistor
(10kOhm) on lines
not connected to U=5 V.
High voltage is connected to the HV line and current on the neighboring
strip is measured (leak).
Same procedure is repeated again for the second layer of the tape (except the leakage current test)
stores them directly to both the low mass tape database and file. Before the test is performed
a sticker with the tape bar-code is glued to the low mass tape.