Mounting and alignment of full-shell replicated x-ray optics

Gubarev, Mikhail V.; Arnold, William R.; Benson, C. M.; Kester, Thomas; Lehner, David L.; Ramsey, Brian D.; Upton, Ryan

doi:10.1117/12.735832

Cited by 3 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The picture of the alignment and mounting station with a 230 mm diameter shell installed is shown in figure 2. The design considerations for the station were discussed in a previous paper 5 . It was shown that mirror shell distortions due to tilt and support point displacements can be determined using shell circularity measurements carried out close to the shell edges.…”

Section: Shell Alignment and Mounting Stationmentioning

confidence: 99%

Alignment system for full-shell replicated x-ray mirrors

2009

Self Cite

View full text Add to dashboard Cite

We are developing grazing-incidence x-ray optics for high-energy astrophysical applications using the electroformnickel replication process. For space-based applications these optics must be light-weight yet stable, which dictates the use of very-thin-walled full-shell mirrors. Such shells have been fabricated with resolution as good as 1 1arcsec for hard x-rays, and technology enhancements under development at MSFC are aimed at producing mirrors with resolution better than 10 arcsec. The challenge, however, is to preserve this resolution during mounting and assembly. We present here a status report on a mounting and alignment system currently under development at Marshall Space Flight Center designed to meet this challenge.

show abstract

Section: Shell Alignment and Mounting Stationmentioning

confidence: 99%

Alignment system for full-shell replicated x-ray mirrors

2009

Self Cite

View full text Add to dashboard Cite

show abstract

A hard x-ray telescope science enhancement package for the Constellation X-Ray mission

Ramsey

Gorenstein

2007

SPIE Proceedings

Self Cite

View full text Add to dashboard Cite

Details of a hard-x-ray science enhancement package for the Constellation-X mission are presented. A scientific case is made for the inclusion of such an instrument on the planned mission and a detailed design is presented that will sati sfy science requirements yet fall within the ground rules for enhancement packages: a cost of less than $100M and a mass of no more than 100 kg. INTRODUCTIONThe instrument described here was proposed in response to the Constellation-X solicitation of "white papers" containing concepts for the Science Enhancement Package (SEP) that will augment the capability of the mission I. The SEP is required to be compatible with a redesigned spacecraft and launch vehicle that are smaller than before. The premise is that the effective area and bandwidth of the soft-x-ray telescope (SXT) will remain essentially the same as in the original design. Any additions should add no more than 100 kg to the mass of the payload and no more than $100 M to the cost.The motive behind this proposal is the concern that the bandwidth of the SXT is not sufficiently broad to accomplish one of the most important scientific objectives of the Const ellation X-Ray Mission: obtaining unambiguous measurements of the profile of a Ka fluorescence line of iron that has been redshifted into a broadly extended feature by strong gravity forces in the vicinity of an accreting black hole. The proposed instrument is a hard-x-ray telescope (HXT) that extends the bandwidth of Con-X and permits measurements of the magnitude and functional form of the continuum on which the Fe feature sits. The continuum spectrum in the vicinity of the Fe line may be influenced by the "Compton hump" that is present in the X -ray spectrum of a black hole. The SXT will not be able to detect it over an energy range that is sufficiently large to define its functional form because the Compton hump reaches a peak at an energy beyond its high energy cutoff. SCIENTIFIC JUSTIFICATIONObserving and quantifying the gravitational redshift in the vicinity of black holes is a major, if not the most important, scientific objective of Con-X as this will provide new information about the behavior of matter in strong gravitational fields and the laws of general relativity. The nearby (z = 0.00775) Seyfert galaxy MCG-6-30-15 contains a prime example ofa gravitationally-broadened Fe line. The abundance of iron is 2 to 3 times solar 2 , which makes it a particularly good object from which to draw conclusions about the broad Fe feature. The broad-line effect was discovered by ASCA 3 and has been observed .since by ASCA again on several occasions, as well as Be~poSAX4 and RXTE 5 • Furthermore, there was a long XMM-Newton exposure 6 and a more recent Suzaku observation. InS, several models were considered including the spin of the black hole that could explain the shape of the broad Fe line.https://ntrs.nasa.gov/search.jsp?R=20080003843 2018-05-12T13:09:05+00:00Z

show abstract

Prediction of Grazing Incidence Focusing Mirror Imaging Quality Based on Accurate Modelling of the Surface Shape Accuracy for the Whole Assembly Process

Li,

Zhang,

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

The key indicator of a grazing incidence focusing mirror’s imaging quality is its angular resolution, which is significantly influenced by its surface shape distribution error. In this paper, we propose a method for the prediction of grazing incidence focusing mirror imaging quality based on accurate modelling of the surface shape accuracy for the whole assembly process. Firstly, the three-dimensional surface shape distribution error of the inner surface of the focusing mirror is reconstructed based on measured point cloud data, and the changes in the surface shape induced by suspension gravity and the adhesive curing shrinkage force are obtained through simulation, and then an accurate geometric digital twin model based on the characterisation of its surface shape accuracy is established. Finally, a study on the quantitative prediction of the angular resolution of its imaging quality is performed. The results show that the surface shape error before assembly has the greatest influence on the imaging quality; the difference in angular resolution between the two suspension methods under the influence of gravity is approximately 2.1″, and the angular resolution decreases by about 4.2″ due to adhesive curing. This method can provide effective support for the prediction of the imaging quality of grazing incidence focusing mirrors.

show abstract

Mounting and alignment of full-shell replicated x-ray optics

Cited by 3 publications

References 4 publications

Alignment system for full-shell replicated x-ray mirrors

Alignment system for full-shell replicated x-ray mirrors

A hard x-ray telescope science enhancement package for the Constellation X-Ray mission

Prediction of Grazing Incidence Focusing Mirror Imaging Quality Based on Accurate Modelling of the Surface Shape Accuracy for the Whole Assembly Process

Contact Info

Product

Resources

About