The TESIS experiment on the CORONAS-PHOTON spacecraft

Kuzin, S. V.; Zhitnik, I. A.; Shestov, S. V.; Богачев, С. А.; Bugaenko, O. I.; Ignat'ev, A. P.; Pertsov, A. A.; Ulyanov, A. S.; Reva, A. A.; Slemzin, V. A.; Sukhodrev, N. K.; Ivanov, Yu. S.; Goncharov, L. A.; Mitrofanov, A. V.; Popov, S. G.; Shergina, T. A.; Соловьев, В. А.; Oparin, S. N.; Zykov, A. M.

doi:10.1134/s0038094611020110

Cited by 47 publications

(27 citation statements)

References 5 publications

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“…This instrument was developed at the Lebedev Institute of the Russian Academy of Sciences and launched on board the CORONAS-Photon satellite on 30 January 2009 (Kuzin et al 2011). The telescope had two EUV channels centred at 171 and 304 Å, and during the regular phase of observations it produced images of the full solar disc and the low corona with the field of view (FOV) of 1.0…”

Section: Observationsmentioning

confidence: 99%

Plasma dynamics in solar macrospicules from high-cadence extreme-UV observations

Loboda

Богачев

2017

A&A

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Macrospicules are relatively large spicule-like formations found mainly over the polar coronal holes when observing in the transition region spectral lines. In this study, we took advantage of the two short series of observations in the He ii 304 Å line obtained by the TESIS solar observatory with a cadence of up to 3.5 s to study the dynamics of macrospicules in unprecedented detail. We used a one-dimensional hydrodynamic method based on the assumption of their axial symmetry and on a simple radiative transfer model to reconstruct the evolution of the internal velocity field of 18 macrospicules from this dataset. Besides the internal dynamics, we studied the motion of the apparent end points of the same 18 macrospicules and found 15 of them to follow parabolic trajectories with high precision which correspond closely to the obtained velocity fields. We found that in a clear, unperturbed case these macrospicules move with a constant deceleration inconsistent with a purely ballistic motion and have roughly the same velocity along their entire axis, with the obtained decelerations typically ranging from 160 to 230 m s −2 , and initial velocities from 80 to 130 km s −1 . We also found a propagating acoustic wave for one of the macrospicules and a clear linear correlation between the initial velocities of the macrospicules and their decelerations, which indicates that they may be driven by magneto-acoustic shocks. Finally, we inverted our previous method by taking velocities from the parabolic fits to give rough estimates of the percentage of mass lost by 12 of the macrospicules. We found that typically from 10 to 30% of their observed mass fades out of the line (presumably being heated to higher coronal temperatures) with three exceptions of 50% and one of 80%.

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Section: Observationsmentioning

confidence: 99%

Plasma dynamics in solar macrospicules from high-cadence extreme-UV observations

Loboda

Богачев

2017

A&A

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“…For the regular observations in the 304Å channel the cadence was set to 4.0 min, but as the observations were non-continuous because of the partly Earth-shaded orbit of the satellite, the resulting mean cadence amounted to ∼ 7.2 min. To make sure that the CCD showed no apparent signs of degradation during the observation period, which could affect our investigations, we calculate the average response Since the entrance and detector filters of the telescope were relatively broad, dedicated mainly to block the strong white-light radiation from the Sun, the bandpass in the 304Å channel of TESIS was predominantly defined by the spectral reflectivity of its focusing mirror, which is shown in Figure 2b (Kuzin et al, 2011). This figure also indicates the main contributors to this relatively broad-band channel: the closely spaced Si xi line at 303.3Å and He ii line at 303.8Å.…”

Section: Observationsmentioning

confidence: 99%

Quiescent and Eruptive Prominences at Solar Minimum: A Statistical Study via an Automated Tracking System

Loboda

Богачев

2015

Sol Phys

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We employ an automated detection algorithm to perform a global study of solar prominence characteristics. We process four months of TESIS observations in the He ii 304Å line taken close to the solar minimum of 2008-2009 and focus mainly on quiescent and quiescent-eruptive prominences. We detect a total of 389 individual features ranging from 25 × 25 to 150 × 500 Mm 2 in size and obtain distributions of many their spatial characteristics, such as latitudinal position, height, size and shape. To study their dynamics, we classify prominences as either stable or eruptive and calculate their average centroid velocities, which are found to be rarely exceeding 3 km s −1 . Besides, we give rough estimates of mass and gravitational energy for every detected prominence and use these values to evaluate the total mass and gravitational energy of all simultaneously existing prominences (10 12 -10 14 kg and 10 29 -10 31 erg, respectively). Finally, we investigate the form of the gravitational energy spectrum of prominences and derive it to be a power-law of index −1.1 ± 0.2.

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“…at wide height ranges (up to 2 solar radii). [3]. To reach proposed scientific goals KORTES will embody latest achievements in fabrication of EUV multilayer mirrors (MMs), synthesizing of multilayer coating filters and image registration techniques.…”

Section: Solar Sensormentioning

confidence: 99%

Complex of instrumentation KORTES for the EUV and x-ray imaging and spectroscopy of the solar corona

et al. 2014

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We report on the current status of the KORTES project -the first sun-oriented mission for the International Space Station to be launched in 2016-2017. KORTES will comprise several imaging and spectroscopic instruments that will observe solar corona in a number of wavebands, covering EUV and X-Ray ranges. A brief overview of the instrumentation of KORTES, its' layout, technical parameters and scientific objectives is given. An additional attention is given to the design of multilayer optics and filters to be employed in EUV instruments of KORTES.

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The TESIS experiment on the CORONAS-PHOTON spacecraft

Cited by 47 publications

References 5 publications

Plasma dynamics in solar macrospicules from high-cadence extreme-UV observations

Plasma dynamics in solar macrospicules from high-cadence extreme-UV observations

Quiescent and Eruptive Prominences at Solar Minimum: A Statistical Study via an Automated Tracking System

Complex of instrumentation KORTES for the EUV and x-ray imaging and spectroscopy of the solar corona

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