Exposure meter

The exposure meter has been fully calibrated and documented and is now fully integrated in the FIES operating software. The exposure meter is not yet available for the simultaneous-ThAr mode.

To protect the new FIES exposure meter a device has been designed to monitor the light level near the meter and when it exceeded a certain level (well within the limits of the photo-multiplier), it will cut the power and send a signal for the software to read, indicating what has happened.

Thomas Augusteijn 2009-05-14