1. Fiber Attenuation Length Test -Update- Jaewon Park University of Rochester Jupiter/MINERvA Meeting, Dec 7, 2005

2. Reflectivity was about 0.8

3. Raw data plot with double exp fit

4. Check each component of double exponential curve

5. Reverse check Assuming reflectivity is 0.8

6. 1.0 0.8

7. 175ppm_001 175ppm_003 300ppm_001 300ppm_002

8. Fit unmirrored fiber and get fit parameters and then substitute them to mirrored attenuation formula and fit reflectivity

9. model 1model 2model 3 sample #RARR 175ppm10.7910.9850.8300.783 20.8000.9960.8120.799 300ppm10.8051.0180.7690.833 20.7850.9920.8010.774 175ppm(average)0.7960.9910.8210.791 300ppm(average)0.7951.0050.7850.804

11. Curve shapes match