1. Based on a modified LED Beacon ( 6 faces on it) Flashing at 300 Hz Voltage at 23 Volts Rise Time ~ 2.5 ns FWHM ~ 5 ns Proposal for measuring optical attenuation for different wavelength Measurement Instrument Three LEDs by face pointing up-wards One different wavelength on each face To assure redundance and to check systematics CB 30 -> 470 nm 385400440470505518

2. LED VAOL-5GUV8T4 FWHM Mean Provided by ManufacturerMeasured at IFIC LEDFWHM (nm)Mean (nm)FWHM (nm)Mean (nm) VAOL-5GUV8T4 538511383 HUVL400-520B 2040012399 Ultrabright Pink -44022445 HLMP-CB30-K000 3547030455 HLMP-CE36-WZ000 3050537493 SLA-580ECT3F 3551850537 Proposal for measuring optical attenuation for different wavelength LED HLMP-CB30-K000 FWHM Mean

3. Wavelength (nm)10 V17 V23 VΔVΔV 385383 0 400 399 1 440447446 4452 4704614584556 505507497 49314 518541540 5374 LED – 505 nmc Proposal for measuring optical attenuation for different wavelength Effects of the Voltage on the wavelength LED – 385 nm

4. UV1 – 382 nm – Medida experimental a 2, 1 y 0,1 KHz Volt1 KHz - 23 V2 KHz – 23 V100 Hz – 23 V Peak383.4050383.3650383.3250 FWHM9.00809.17108.9290

5. C505_1 – 505 nm – Medida experimental a 10, 17 y 23 Volts Volt10 V17 V23 Peak507.9776497.1478 493.3130 FWHM35.4739 36.704537.2523