Progress report on APD zThe Gain measurements were made using a good channel of APD for the red, yellow, green and blue light, using different LEDs as source of light. zAlso, a gain curve from direct measurements was compared to the curve provided by the manufacturer. zWork on the better APD shielding and connectivity to amplifiers is in progress

Progress report on APD zThe reason why the measured curve is not as sharp as provided by the manufacturer could be due to the relatively high noise levels.

Progress report on APD

zFor the second APD: zTests of random 10 channels show conformity to the specifications of the “good” channels of the 1st matrix. zWork in progress to create a “personal” shielding for this APD so that it can be used outside of black box.

Progress report on APD z2nd APD connection circuit is realized and is working zMeasurements of Gain of APD were performed for different wavelengths z10 elements of 2nd APD matrix were tested zNo change in APD temperature was detected during tests zWork is ongoing on the second APD connectivity to the amplifier zNext, pre-amp will be connected and all channels tested together zAlso, some progress is done towards measuring the Gain vs. temperature zWork on the compact shielding of APD is in progress. Summary