ART-XC/SRG: status of the x-ray optics development

Gubarev, Mikhail V.; Ramsey, Brian D.; Elsner, Ronald F.; O’Dell, Stephen L.; Kolodziejczak, Jeffery; McCracken, Jeff; Zavlin, V. E.; Swartz, Douglas A.; Kilaru, Kiranmayee; Atkins, Carolyn; Pavlinsky, M.; Tkachenko, A.; Lapshov, I.

doi:10.1117/12.2056813

Cited by 8 publications

(8 citation statements)

References 5 publications

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“…Telescope ART-XC is being developed in Space Research Institute of Russian Academy of Sciences in Moscow (IKI RAS) and All-Russian Scientific Research Institute for Experimental Physics (VNIIEF) in the Sarov city. ART-XC mirror systems are being manufactured in MSFC/NASA [4]. ART-XC will increase observatory sensitivity in hard energy band.…”

Section: Object Of the Test And Testing Problem Statementmentioning

confidence: 99%

ART-XC/SRG: results of thermo-vacuum tests

Semena¹,

Pavlinsky²,

Buntov³

et al. 2014

SPIE Proceedings

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ART-XC -a medium-x-ray-energy survey instrument for SRG project is being developed in Russia. Space Research institute (IKI) and Federal Nuclear Center (VNIIEF) has developed and tested the STM (Structural and Thermal Model) of ART-XC/SRG Instrument. The STM was tested in a 40 m 3 vacuum chamber, equipped with black cryogenic screens, cooled by liquid nitrogen. During the tests various thermal telescope modes were simulated. In particular we have simulated emergency mode, when mirrors heaters were switched-off. During the tests temperature of instrument's structure was controlled by 64 independent sensors. Stability of optical axis of mirror systems was also measured. STM test has shown that temperature of mirror system was lower than required, temperature of detectors met the requirements. The test also confirmed geometrical stability of the carbon fiber housing despite of significant temperature gradients. Additional experiments with two mirror systems, each containing a full set of simple nickel shells, were performed. In these experiments we have measured longitudinal and transverse temperature gradients of mirror systems. Next thermovacuum tests of the qualification model of the ART-XC instrument are being prepared. Results of STM tests are presented in this paper.

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Section: Object Of the Test And Testing Problem Statementmentioning

confidence: 99%

ART-XC/SRG: results of thermo-vacuum tests

Semena¹,

Pavlinsky²,

Buntov³

et al. 2014

SPIE Proceedings

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“…Four flight modules were produced under an International Reimbursable Agreement between NASA and the Space Research Institute (IKI) in Moscow, Russia, and three flight modules and one spare unit were fabricated under a Cooperative Agreement between NASA and IKI. The details of the mirror design and development can be found in [3,4,5]. Each module consists of 28 concentrically nested (two-reflection) grazing-incidence mirrors made of an electroformed nickel-cobalt alloy and mounted on a single spider through combs glued onto the spider legs.…”

Section: Art-xc Mirror Modulesmentioning

confidence: 99%

“…A number of angular resolution measurements were performed to determine the optimal angular resolution across the FOV. It was found that defocusing a module by intra-focal 7 mm provides more uniform angular resolution across the FOV compared to the resolution at the nominal focal distance [5]. In the following, we adopt each ART-XC module being defocused by 7 mm as a default ART-XC design, unless otherwise stated.…”

Section: Art-xc Mirror Modulesmentioning

confidence: 99%

Calibration of the ART-XC mirror modules at MSFC

Krivonos¹,

Tkachenko²,

Burenin³

et al. 2017

Exp Astron

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The Astronomical Roentgen Telescope X-ray Concentrator (ART-XC) is a hard X-ray telescope with energy response up to 30 keV, to be launched on board the Spectrum Roentgen Gamma (SRG) spacecraft in 2018. ART-XC consists of seven identical co-aligned mirror modules. Each mirror assembly is coupled with a CdTe double-sided strip (DSS) focal-plane detector. Eight X-ray mirror modules (seven flight and one spare units) for ART-XC were developed and fabricated at the Marshall Space Flight Center (MSFC), NASA, USA. We present results of testing procedures performed with an X-ray beam facility at MSFC to calibrate the point spread function (PSF) of the mirror modules. The shape of the PSF was measured with a high-resolution CCD camera installed in the focal plane with defocusing of 7 mm, as required by the ART-XC design. For each module, we performed a parametrization of the PSF at various angular distances Theta. We used a King function to approximate the radial profile of the near on-axis PSF (Theta<9 arcmin) and an ellipse fitting procedure to describe the morphology of the far off-axis angular response (9

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“…Over the past decade, NASA's MSFC has been improving the angular resolution of hard X-ray (HXR) optics to the point that they now routinely manufacture <26 HPD optics modules for flight payloads (Ramsey et al, 2013;Gubarev et al, 2014). Included in this HXR optics program are mirror modules produced for the ART-XC experiment to be flown on the Spectrum-Roengen Gamma mission (∼25 HPD) system performance up to ∼30 keV and the flight-proven HXR mirrors flown on the HERO and HEROES balloon-bone HXR telescopes.…”

Section: Heroes Opticsmentioning

confidence: 99%

“…(Elsner et al, 2000)), HERO (Ramsey et al, 2002), FOXSI, potential wide-field applications (e.g. Elsner et al, 2011)), and most recently ART-XC (Gubarev et al, 2014).…”

Section: Effective Areamentioning

confidence: 99%

Calibration of the High Energy Replicated Optics to Explore the Sun (HEROES) Hard X-ray Telescope

Wilson-Hodge

Gaskin

Christe

et al. 2014

J. Astron. Instrum.

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Sun (HEROES) hard Xray telescope flew as a balloon payload from Ft. Sumner, NM. HEROES observed the Sun, the black hole binary GRS 1915+105, and the Crab Nebula during its 27 h flight. In this paper, we describe laboratory calibration measurements of the HEROES detectors using line and continuum sources and applications of these measurements to define channel to energy (gain) corrections for observed events and to define detector response matrices. We characterize the HEROES X-ray grazing incidence optics using measurements taken in the Stray Light Facility (SLF) in Huntsville, AL, and using ray traces. We describe the application of our calibration measurements to in-flight observations of the Crab Nebula.

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ART-XC/SRG: status of the x-ray optics development

Cited by 8 publications

References 5 publications

ART-XC/SRG: results of thermo-vacuum tests

ART-XC/SRG: results of thermo-vacuum tests

Calibration of the ART-XC mirror modules at MSFC

Calibration of the High Energy Replicated Optics to Explore the Sun (HEROES) Hard X-ray Telescope

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