The optomechanical design for the Off-plane Grating Rocket Experiment (OGRE)

O'Meara, Bridget C.; Donovan, Benjamin D.; Tutt, James H.; McEntaffer, Randall L.; Schultz, Ted; Allgood, Kim D.; Biskach, Michael P.; Chan, Kai Wing; Kearney, John D.; Mazzarella, James R.; Riveros, Raul E.; Saha, Timo T.; Hlinka, Michal; Numata, Ai; Solly, Peter M.; Zhang, William W.; Soman, Matthew R.; Holland, Andrew D.; Lewis, Morgan; Holland, Karen; Murray, Neil J.

doi:10.1117/12.2530202

Cited by 2 publications

(10 citation statements)

References 6 publications

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“…This completes the manufacture of a grating substrate. 1,13 Once individual grating substrates have been manufactured, they are then stacked on top of each other to realize aligned grating stacks as depicted in Figure 4. The wedged grating substrates themselves largely constrain the grating-level pitch, roll, and ŷ alignment during this stacking process (degrees of freedom shown in Figure 4).…”

Section: Grating Alignmentmentioning

confidence: 99%

“…The currently envisioned stack-level alignment methodology utilizes a precisely polished surface and additional constraint pins to align the two stacks relative to one another. 13 This system is depicted in Figure 5. The polished surface (polished to within ±1 µm) orients the two stacks with respect to one another in ŷ, pitch, and roll, while the pins constrain the stacks in the three remaining degrees of freedom.…”

Section: Stack Alignmentmentioning

confidence: 99%

“…A more complete discussion of this alignment method can be found in O'Meara et al (2019). 13 Each degree of freedom for stack-level alignment (as defined in Figure 5) and their impact on the LSF is discussed below. The anticipated alignment methodology for the two grating stacks to form a single grating module.…”

Section: Stack Alignmentmentioning

confidence: 99%

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A Comprehensive Line-Spread Function Error Budget for the Off-Plane Grating Rocket Experiment

Donovan¹,

McEntaffer²,

Tutt³

et al. 2021

Preprint

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The Off-plane Grating Rocket Experiment (OGRE) is a soft X-ray grating spectrometer to be flown on a suborbital rocket. The payload is designed to obtain the highest-resolution soft X-ray spectrum of Capella to date with a resolution goal of R(λ/∆λ) > 2000 at select wavelengths in its 10-55 Å bandpass of interest. The optical design of the spectrometer realizes a theoretical maximum resolution of R ≈ 5000, but this performance does not consider the finite performance of the individual spectrometer components, misalignments between components, and in-flight pointing errors. These errors all degrade the performance of the spectrometer from its theoretical maximum. A comprehensive line-spread function (LSF) error budget has been constructed for the OGRE spectrometer to identify contributions to the LSF, to determine how each of these affects the LSF, and to inform performance requirements and alignment tolerances for the spectrometer. In this document, the comprehensive LSF error budget for the OGRE spectrometer is presented, the resulting errors are validated via raytrace simulations, and the implications of these results are discussed.

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Section: Grating Alignmentmentioning

confidence: 99%

Section: Stack Alignmentmentioning

confidence: 99%

See 1 more Smart Citation

A Comprehensive Line-Spread Function Error Budget for the Off-Plane Grating Rocket Experiment

Donovan¹,

McEntaffer²,

Tutt³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…This completes the manufacture of a grating substrate. 1,14 Once individual grating substrates have been manufactured, they are then stacked on top of each other to realize aligned grating stacks as shown in Fig. 4.…”

Section: Grating Alignmentmentioning

confidence: 99%

“…5 The anticipated alignment methodology for the two grating stacks to form a single grating module. 14 The two stacks would be placed on the bottom surface, then abutted against pins A and B and either pin C or pin D. The precisely machined bottom plate constrains theŷ , pitch, and roll of the grating stacks, whereas pins constrain the remaining three DoF -x ,ẑ, and yaw. Here, pins A and B constrain thex and yaw alignment and pins C and D constrain theẑ alignment between grating stacks.…”

Section: Stack Alignmentmentioning

confidence: 99%