Results of silicon pore optics mirror modules optical integration in the ATHENA telescope

Valsecchi, Giuseppe; Marioni, Fabio; Bianucci, Giovanni; Zocchi, Fabio E.; Gallieni, D.; Parodi, Giancarlo; Ottolini, M.; Collon, M.; Pareschi, G.; Spiga, D.; Bavdaz, Marcos; Wille, Eric; Burwitz, V.

doi:10.1117/12.2309925

Cited by 5 publications

(4 citation statements)

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“…Recently at PANTER tests were done to check two competing Assembly Integration and Testing (AIT) methods to mount and co-align the SPO modules into the mirror assembly in this case two optics into a mini petal. One AIT approach (Media Lario) [15,16] uses UV light to check the alignment of the optics into the petal. The other approach (Thales-CH) [17,18] used a metrology characterization of the individual optics at BESSY and then co-aligned them based on the metrology in PANTER.…”

Section: Recent Athena and Arcus Related Testsmentioning

confidence: 99%

X-ray testing at PANTER of optics for the ATHENA and Arcus Missions

Burwitz

Bavdaz²,

Wille³

et al. 2019

International Conference on Space Optics — ICSO 2018

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Currently for the European Space Agency (ESA) ATHENA [1,2] mission Silicon Pore Optic (SPO) [3][4][5][6][7][8] Mirror Modules (MM) with a focal length of f = 12 m, are being developed and tested. The SPO MMs are also the baseline optic for the NASA medium explorer high-resolution spectroscopy mission Arcus [9-10] with f = 12 m that is currently undergoing a phase A study. SPOs are currently being tested at both the PTB laboratory of the BESSY synchrotron facility in Berlin using an X-ray pencil beam and the PANTER X-ray test facility in Neuried of the Max-Planck-Institut für extraterrestrische Physik, Garching using a long vacuum beamline (distance source to optic ~120 m). The different types of measurements performed at PANTER to characterise the ATHENA and Arcus optics will be discussed. This will be done on the level of an X-ray optical unit (XOU) composed of both a primary and secondary High Performance Optic (HPO) stack, a mirror module (MM) composed of two XOUs, small (<4 MMs) and large (< 25 MM) petals, and the complete integrated optic Athena (700-1000 MMs) and Arcus (4 petals each with 38 MMs). The main set of tests that are currently done at PANTER make full use the possibility to fully-illuminate single XOUs, MMs, and petals to determine their optical characteristics such as the half energy width of the point spread function as well as the effective area and the vignetting function at different energies. To ensure that the measurements, that are required to demonstrate the performance of ATHENA, are possible, a description of recent and upcoming upgrades to the PANTER X-ray test facility will be given. Finally, a status update on the progress on designing the new facility to be used to test and calibrate the complete ATHENA mirror will be presented.

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Section: Recent Athena and Arcus Related Testsmentioning

confidence: 99%

X-ray testing at PANTER of optics for the ATHENA and Arcus Missions

Burwitz

Bavdaz²,

Wille³

et al. 2019

International Conference on Space Optics — ICSO 2018

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“…Figure 9 shows the UV and X-ray images of the resulting PSF, with clearly visible overlapped centroids. Figure 10 shows the X-ray x-FWHM and the centroid distance, all plotted against the focal distance [13].…”

Section: Integration Demonstrator and Resultsmentioning

confidence: 99%

ATHENA Telescope: alignment and integration of SPO mirror modules

Valsecchi

Marioni

Bianucci

et al. 2019

International Conference on Space Optics — ICSO 2018

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ATHENA (Advanced Telescope for High-ENergy Astrophysics) is the next high-energy astrophysical mission of the European Space Agency currently planned to be launched in the early 2030s, as part of its Cosmic Vision program, on the scientific topic of "Hot and Energetic Universe". The optics technology is based on the Silicon Pore Optics (SPO). About 678 SPO mirror modules will have to be integrated and co-aligned onto the optical bench of the Mirror Assembly Module (MAM) of ATHENA. This activity will have to be completed in about two years. Media Lario leads an industrial and scientific team that has developed the process to align and integrate the SPO Mirror module with an accuracy better than 1 arcsec. The process is based on position of the centroid of the point spread function produced by each mirror module when illuminated by a collimated planewave at 218 nm taken at 12 m focal length. Experimental tests, using two SPO mirror modules, and correlation with X-ray measurement at the PANTER test facility in Münich have demonstrated that this process meets the accuracy requirement. It was also demonstrated, that a mirror module can be removed again from the MAM, and re-installed, without compromising the adjacent mirror modules. This technique allows arbitrary integration sequence and integration of two Mirror Modules per day. Moreover, it enables monitoring the telescope point spread function during the whole integration phase.

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“…Each SPO MM can be removed and replaced if found to be misaligned. This process has already been tested, and found to meet the Arcus requirement of increasing the PSF in the dispersion direction by less than 1.5 arcsec HEW [27].…”

Section: Optical Alignmentmentioning

confidence: 99%

“…The SPO MMs will be aligned into the SPO petal using the same procedure as developed and tested for Athena [27]. Fine alignment is performed under illumination by a planar UV wavefront.…”

Section: Optical Alignmentmentioning

confidence: 99%

Arcus: the soft x-ray grating explorer

Abraham

Baird

Bautz

et al. 2019

UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI

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Arcus provides high-resolution soft X-ray spectroscopy in the 12-50 Å bandpass with unprecedented sensitivity, including spectral resolution > 2500 and effective area > 250 cm 2. The three top science goals for Arcus are (1) to measure the effects of structure formation imprinted upon the hot baryons that are predicted to lie in extended halos around galaxies, (2) to trace the propagation of outflowing mass, energy, and momentum from the vicinity of the black hole to extragalactic scales as a measure of their feedback, and (3) to explore how stars form and evolve. Arcus uses the same 12 m focal length grazing-incidence Silicon Pore X-ray Optics (SPOs) that ESA has developed for the Athena mission; the focal length is achieved on orbit via an extendable optical bench. The focused X-rays from these optics are diffracted by high-efficiency Critical-Angle Transmission (CAT) gratings, and the results are imaged with flight-proven CCD detectors and electronics. Combined with the high-heritage NGIS LEOStar-2 spacecraft and launched into 4:1 lunar resonant orbit, Arcus provides high sensitivity and high efficiency observing of a wide range of astrophysical sources.

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Results of silicon pore optics mirror modules optical integration in the ATHENA telescope

Cited by 5 publications

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X-ray testing at PANTER of optics for the ATHENA and Arcus Missions

X-ray testing at PANTER of optics for the ATHENA and Arcus Missions

ATHENA Telescope: alignment and integration of SPO mirror modules

Arcus: the soft x-ray grating explorer

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