Comparing modelling techniques when designing VPH gratings for BigBOSS

Claire Poppett; Jerry Edelstein; Michael Lampton; Patrick Jelinsky; James Arns

doi:10.1117/12.925737

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13 September 2012 Comparing modelling techniques when designing VPH gratings for BigBOSS

Claire Poppett, Jerry Edelstein, Michael Lampton, Patrick Jelinsky, James Arns

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Proceedings Volume 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II; 845044 (2012) https://doi.org/10.1117/12.925737
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

BigBOSS is a Stage IV Dark Energy instrument based on the Baryon Acoustic Oscillations (BAO) and Red Shift Distortions (RSD) techniques using spectroscopic data of 20 million ELG and LRG galaxies at 0.5≤z≤1.6 in addition to several hundred thousand QSOs at 0.5≤z≤3.5. When designing BigBOSS instrumentation, it is imperative to maximize throughput whilst maintaining a resolving power of between R=1500 and 4000 over a wavelength range of 360-980 nm. Volume phase Holographic (VPH) gratings have been identified as a key technology which will enable the efficiency requirement to be met, however it is important to be able to accurately predict their performance. In this paper we quantitatively compare different modelling techniques in order to assess the parameter space over which they are more capable of accurately predicting measured performance. Finally we present baseline parameters for grating designs that are most suitable for the BigBOSS instrument.

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Claire Poppett, Jerry Edelstein, Michael Lampton, Patrick Jelinsky, and James Arns "Comparing modelling techniques when designing VPH gratings for BigBOSS", Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 845044 (13 September 2012); https://doi.org/10.1117/12.925737

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