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Optical Subsystem Design

Optical Subsystem Design. Lloyd W. Hillman Team with: Yoshi Takahashi, Alex Zuccaro, Ken Pitalo. Baseline Design Polychromatic (I) : 1st &5 th Surfaces Micro-grated. 80% Energy Bucket Spot Size 3-7 mm for all the fluorescence lines: 337-391 nm.

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Optical Subsystem Design

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  1. Optical Subsystem Design Lloyd W. Hillman Team with: Yoshi Takahashi, Alex Zuccaro, Ken Pitalo

  2. Baseline DesignPolychromatic (I) : 1st &5th Surfaces Micro-grated 80% Energy Bucket Spot Size3-7 mmforall the fluorescence lines: 337-391 nm.

  3. Ongoing Risk ReductionOptical Design Tasks in Phase-A/B On-going Designing Studies for Higher Resolution: Improved imaging by using aspherically-curved base: • Lower F/#, larger entrance pupil • Preliminary aspheric base optimization already showed 25% smaller spot sizes than those shown in CSR. • Designs with low dispersion materials will be further developed for further improvement for higher-resolution . Extensive CODE-V, ZEMAX and ASAP runs for: • Further tolerance studies, • Error budget analysis.

  4. EUSO OPTIMIZED RMS SPOT SIZE DIAMETER VS EPD l = 357MATERIAL UVPMMA_000 FIELD ANGLE (DEG) l = 337 l = 391 RMS SPOTSIZE DIAMETER EPD = 1900 (mm) OPTIMIZED RMS SPOTSIZE DIAMETER EPD = 1900 (mm) 0% Increase on axis. OPTIMIZED RMS SPOTSIZE DIAMETER EPD = 2000 (mm) 10.8% Increase on axis. OPTIMIZED RMS SPOTSIZE DIAMETER EPD = 2100 (mm) 22.16% Increase on axis. OPTIMIZED RMS SPOTSIZE DIAMETER EPD = 2200 (mm) 34.07% Increase on axis. OPTIMIZED RMS SPOTSIZE DIAMETER EPD = 2300 (mm) 46.53% Increase on axis. OPTIMIZED RMS SPOTSIZE DIAMETER EPD = 2400 (mm) 59.55% Increase on axis. OPTIMIZED RMS SPOTSIZE DIAMETER EPD = 2500 (mm) 73.13% Increase on axis. 0 0.15530E+02 0.10307E+01 0.10240E+01 0.14776E+01 0.11785E+01 0.31876E+01 0.28367E+01 0.27997E+01 0.20388E+02 2 0.11178E+01 0.11264E+01 0.15502E+01 0.12319E+01 0.32167E+01 0.28834E+01 0.27850E+01 4 0.13584E+01 0.14061E+01 0.17737E+01 0.14442E+01 0.33108E+01 0.30330E+01 0.29663E+01 6 0.17196E+01 0.18183E+01 0.21522E+01 0.18674E+01 0.34970E+01 0.33228E+01 0.33332E+01 8 0.21696E+01 0.23264E+01 0.26653E+01 0.24775E+01 0.37929E+01 0.37662E+01 0.38600E+01 10 0.15621E+02 0.26712E+01 0.28859E+01 0.32624E+01 0.32136E+01 0.41918E+01 0.43308E+01 0.45185E+01 0.19935E+02 12 0.31746E+01 0.34510E+01 0.38898E+01 0.40021E+01 0.46545E+01 0.49437E+01 0.52140E+01 14 0.36341E+01 0.39644E+01 0.44813E+01 0.47776E+01 0.51345E+01 0.55133E+01 0.58761E+01 16 0.39995E+01 0.43785E+01 0.49743E+01 0.54795E+01 0.55523E+01 0.59495E+01 0.64125E+01 18 0.42174E+01 0.46359E+01 0.53156E+01 0.60331E+01 0.58008E+01 0.61833E+01 0.67125E+01

  5. 20 0.14824E+02 0.42464E+01 0.47169E+01 0.54670E+01 0.63117E+01 0.58166E+01 0.61783E+01 0.66985E+01 0.19536E+02 22 0.40806E+01 0.46142E+01 0.54407E+01 0.61878E+01 0.55788E+01 0.59093E+01 0.63426E+01 24 0.37727E+01 0.44254E+01 0.52324E+01 0.56670E+01 0.51859E+01 0.54991E+01 0.58145E+01 26 0.34909E+01 0.42402E+01 0.49701E+01 0.49648E+01 0.49069E+01 0.54036E+01 0.57540E+01 28 0.35959E+01 0.42482E+01 0.47853E+01 0.49257E+01 0.54530E+01 0.65907E+01 0.72907E+01 30 0.14635E+02 0.46522E+01 0.51277E+01 0.55092E+01 0.69755E+01 0.79586E+01 0.95346E+01 0.11000E+02 0.17460E+02 NOTE! AIRSPACES 1 AND 2 WERE NOT OPTIMIZED. THE FAR FIELD VIGNETTING INCREASES WITH AIRSPACE OPTIMIZATION.

  6. Field EPD = 2000 mm (+10.8%) RMS Spot Size (mm) EUSO_PITALO_EPD2000_ 2DIFF_VIGN04_FINAL.LEN 90% EE (mm) EPD = 2100 mm (+22.16%) RMS Spot Size (mm) EUSO_PITALO_EPD2100_ 2DIFF_ FINAL.LEN 90% EE (mm) EPD = 2200 mm (+34.07%) RMS Spot Size (mm) EUSO_PITALO_EPD2200_ 2DIFF_ FINAL.LEN 90% EE (mm) EPD = 2300 mm (+46.53%) RMS Spot Size (mm) EUSO_ EPD2300_ NOPOWER_ PITALO.LEN 90% EE (mm) UAH 0° 1.6 2.1 1.8 2.9 2.8 4.6 3.1 2.7 5.8 4.3 UNIVERSITY OF ALABAMA IN HUNTSVILLE 5° 2.2 3.1 2.5 3.8 3.1 4.6 3.1 3.5 5.0 5.3 10° 3.2 4.6 3.7 5.6 3.5 5.4 4.1 4.5 6.2 6.5 15° 4.0 6.0 4.2 6.5 3.9 5.9 5.1 4.7 7.7 6.9 20° 4.6 7.3 4.4 7.1 4.1 6.5 5.5 5.0 8.9 7.7 25° 4.2 6.8 3.7 5.4 3.8 5.3 5.0 4.7 8.5 7.9 30° 4.9 7.4 6.5 10.2 7.1 11.4 5.5 5.1 7.5 8.4 Polychromatic Design Study of EUSO LENS Two Double-Sided Fresnel Elements with a Diffractive on the Front Surface of Element 1 and with a the Diffractive on Back Surface of Element 2

  7. Risk Reduction • Can open aperture achieve larger on axis throughput and maintain reasonable spot size. • Off-axis vignetting losses • Aspheric base curvatures yield spots ~30% smaller • Improved encircled energy performance • Full ASAP evaluations in progress.

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