1. ISUAL Spectrophotometer Overview S.Harris

2. NCKU UCB Tohoku Spectrophotometer S. Harris IFR 5 Mar 20012 Spectrophotometer Description Six Channels Identical except for Spectral Bandpass 50 mm f/2 Lens Aperture limits FOV to 20 deg X 5 deg Uses Ruggedized EMR Photomultiplier Tubes Individually Adjustable HV for each Unit Six Co-aligned Modules Packaged with HV and Pre- Amps as one Unit Remainder of Electronics contained in AEP

3. NCKU UCB Tohoku Spectrophotometer S. Harris IFR 5 Mar 20013 Mechanical Layout of One Channel

4. NCKU UCB Tohoku Spectrophotometer S. Harris IFR 5 Mar 20014 One Channel Solid Model

5. NCKU UCB Tohoku Spectrophotometer S. Harris IFR 5 Mar 20015 Spectrophotometer Optical Data SP Channels 1&2 1 -- Bandpass: 150 - 280 nm No filter used EMR type 541 PMT Rubidium Telluride photocathode Sapphire window 2 -- Bandpass: 250 - 390 nm Barr UG-5 glass filter EMR type 541 PMT Bi-alkali photocathode Magnesium Fluoride window

6. NCKU UCB Tohoku Spectrophotometer S. Harris IFR 5 Mar 20016 Spectrophotometer Optical Data SP Channels 3&4 3 -- Center: 337 nm Barr interference filter EMR type 741 PMT Bi-alkali photocathode Sapphire window 4 -- Center: 427.8 nm Barr interference filter EMR type 741 PMT Bi-alkali photocathode Sapphire window

7. NCKU UCB Tohoku Spectrophotometer S. Harris IFR 5 Mar 20017 Spectrophotometer Optical Data SP Channels 5&6 5 -- Bandpass: 665 - 900 nm Notch at 754 - 790 nm Barr interference filter EMR type 741 PMT Tri-alkali photocathode Sapphire window 6 -- Center: 777.4 nm Barr interference filter EMR type 741 PMT Tri-alkali photocathode Sapphire window

8. NCKU UCB Tohoku Spectrophotometer S. Harris IFR 5 Mar 20018 Mechanical Layout of Complete Unit

9. NCKU UCB Tohoku Spectrophotometer S. Harris IFR 5 Mar 20019 SP Unit Solid Model

10. NCKU UCB Tohoku Spectrophotometer S. Harris IFR 5 Mar 200110 Spectrophotometer Thermal Control HVPS heat conducted to side walls and thence to top Photomultiplier Heat also conducted to side walls & top Electronics heat conducted thru PCB to side wall mounts Filter heater assemblies are insulated with a G-10 ring

11. NCKU UCB Tohoku Spectrophotometer S. Harris IFR 5 Mar 200111 Spectrophotometer Analog Electronics Pre-amp/line driver, HV only Integrator and ADC in AEP