A scanning X-ray spectroheliograph

1970 ◽  
Vol 317 (1528) ◽  
pp. 101-112 ◽  
Keyword(s):  
Proportional Counter ◽  
Grazing Incidence ◽  
The Sun ◽  
Design And Development ◽  
X Ray ◽  
Preliminary Results

A grazing incidence reflector which focuses radiation on to a proportional counter has been used to obtain X -ray pictures of the Sun in a number of relatively narrow wavelength bands below 2 nm. The design and development of the instrument is discussed together with the preliminary results from two rocket flights.

scholarly journals A Rocket-Borne X-Ray Spectrometer/Monochromator System for Mapping the Solar Corona

1971 ◽  
Vol 41 ◽  
pp. 181-181
Author(s):  
L. W. Acton ◽  
R. C. Catura ◽  
J. L. Culhane ◽  
A. J. Meyerott
Keyword(s):  
Spatial Distribution ◽  
Solar Corona ◽  
Proportional Counter ◽  
Line Emission ◽  
Field Of View ◽  
The Sun ◽  
X Ray ◽  
Rocket Flight

A rocket payload is being prepared for the purpose of examining the spatial distribution of line emission from two important ions, Ovii and Neix, in the solar corona. The payload will contain the following integrated set of instruments.(1) A pair of X-ray spectrometers utilizing KAP crystals of approximately 100 cm2 area.(2) An optical aspect camera with a 1 Å bandpass H-α filter to measure the location of the field of view of the X-ray systems on the sun through out the rocket flight.(3) A collimated proportional counter spectrometer operating in the 3 to 15 keV range.

scholarly journals Preliminary Results on Intermittent Behaviour of Millisecond Pulsar SAX J1808.4-3658

2004 ◽  
Vol 194 ◽  
pp. 220-220
Author(s):  
M. T. Menna ◽  
A. Papitto ◽  
L. Burderi ◽  
T. Di Salvo ◽  
L. Stella ◽  
...  
Keyword(s):  
Proportional Counter ◽  
Millisecond Pulsar ◽  
X Ray ◽  
Binary Pulsar ◽  
Orbital Parameters ◽  
Preliminary Results ◽  
Proportional Counter Array ◽  
Year 2000

We analyzed RXTE data from the burst of the year 2000 of the X-ray millisecond binary pulsar SAX J 1808.4-3658 with the intent of determining the new orbital parameters.We used the observations of SAX J1808.4-3658 performed by the Rossi X-Ray Timing Explorer (RXTE) when the source was again detected in outburst during the period January-March 2000 (Wijnands et al. 2001). In particular we examined the data from the Proportional Counter Array (РСA) (Jahoda et al. 1996). We first applied barycentric correction to the data using the optical coordinates of the source (Roche et al. 98).

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

2014 ◽  
Vol 03 (02) ◽  
pp. 1440007 ◽  
Author(s):  
Colleen A. Wilson-Hodge ◽  
Jessica Gaskin ◽  
Steven Christe ◽  
Albert Shih ◽  
Allyn Tennant ◽  
...  
Keyword(s):  
Crab Nebula ◽  
Grazing Incidence ◽  
High Energy ◽  
Stray Light ◽  
Detector Response ◽  
The Sun ◽  
X Ray ◽  
Laboratory Calibration ◽  
Grazing Incidence Optics ◽  
The Crab Nebula

On 2013 September 21–22, the High Energy Replicated Optics to Explore the Sun (HEROES) hard X-ray 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.

A Noval X-ray powder Diffractometer Detector System

1976 ◽  
Vol 20 ◽  
pp. 529-545 ◽  
Author(s):  
Susan K. Byram ◽  
Bui Han ◽  
G. B. Rothbart ◽  
Roger N. Samdahl ◽  
Robert A. Sparks
Keyword(s):  
Proportional Counter ◽  
Angular Resolution ◽  
Small Sample ◽  
Detector System ◽  
Diffraction Spectrum ◽  
Powder Spectrum ◽  
Good Efficiency ◽  
X Ray ◽  
Preliminary Results ◽  
Powder Diffractometer

A new proportional counter x-ray detector with application for powder diffractometry has been developed. The new detector collects virtually the entire diffraction spectrum simultaneously with good efficiency and angular resolution. Thus, the powder spectrum of a small sample can be obtained much faster than with film or a conventional powder diffractometer. The detector read-out is digital and is interfaced to a dedicated minicomputer. A description of the detector system is discussed and preliminary results are presented.

Impulsive X-ray Emission by the Sun

1967 ◽  
Vol 1 (2) ◽  
pp. 51-52
Author(s):  
J. R. Harries
Keyword(s):  
Proportional Counter ◽  
Spin Axis ◽  
Field Of View ◽  
The Sun ◽  
Full Width ◽  
X Ray ◽  
Beryllium Window ◽  
Window Area ◽  
Satellite Spin

Solar X-ray bursts have been observed by a xenon-methane filled proportional counter on the satellite IMP-F. The counter is one inch deep and has a 14 mg/cm2 beryllium window. A slat collimator restricts the field of view to a full width of 5° in the direction of the satellite spin while allowing the counter to see ±60° in the plane containing the spin axis. The effective window area of the counter is 2.2 cm2, after allowing for the collimator.

Design and development of grazing incidence x-ray mirrors

2016 ◽  
Author(s):  
Fuchang Zuo ◽  
Zhiwu Mei ◽  
Tao Ma ◽  
Loulou Deng ◽  
Yongqiang Shi ◽  
...  
Keyword(s):  
Grazing Incidence ◽  
Design And Development ◽  
X Ray

scholarly journals A Rocket Payload Using Focusing X-Ray Optics for the Observation of Soft Cosmic X-Rays

1971 ◽  
Vol 41 ◽  
pp. 183-183 ◽  
Author(s):  
P. Gorenstein ◽  
B. Harris ◽  
H. Gursky ◽  
R. Giacconi
Keyword(s):  
Proportional Counter ◽  
Focal Plane ◽  
Grazing Incidence ◽  
Entrance Window ◽  
X Rays ◽  
X Ray ◽  
Plane Detector ◽  
Reflecting Surfaces ◽  
Detection And Localization ◽  
Focal Plane Detector

A rocket payload utilizing focusing optics has been designed and constructed for the detection and localization of cosmic X-ray sources. The instrument is designed to be used in a scanning mode. The sensitivity of the instrument covers the wavelength bands 80 Å to 44 Å and 20 Å to 10 Å with a total field of view of 2° × 8°. A telescope operating on the principle of grazing incidence reflection instantaneously focuses the X-rays from a distant source in one dimension upon one member of four proportional counter elements located in the focal plane. Location precision from a single scan is about 0.1° × 1° for the stronger sources. The telescope consists of eight nested sheets of re-enforced glass whose reflecting surfaces are overcoated with an evaporated layer of chromium to improve reflection properties at the shorter wavelengths. The effective collecting area of the mirror assembly for on-axis radiation is about 160 cm2 at 80 Å, and 40 cm2 at 10 Å. The focal plane detector is a multiwire proportional counter with a one micron polypropylene entrance window and contains a supply of propane gas regulated to a constant pressure of 50 cm. In the wavelength range 80 Å–10 Å the focusing technique results in (1) greater sensitivity, (2) better angular resolution, and (3) improved detector reliability compared to non-focusing techniques. (Published, Nuclear Instruments and Methods91 (1971) 451.)

FOXSI-2: Upgrades of the Focusing Optics X-ray Solar Imager for its Second Flight

2016 ◽  
Vol 05 (01) ◽  
pp. 1640005 ◽  
Author(s):  
Steven Christe ◽  
Lindsay Glesener ◽  
Camilo Buitrago-Casas ◽  
Shin-Nosuke Ishikawa ◽  
Brian Ramsey ◽  
...  
Keyword(s):  
Solid State ◽  
Imaging Spectroscopy ◽  
Grazing Incidence ◽  
Sounding Rocket ◽  
The Sun ◽  
X Ray ◽  
Solid State Detectors ◽  
Fine Pitch ◽  
Alignment System

The Focusing Optics X-ray Solar Imager (FOXSI) sounding rocket payload flew for the second time on 2014 December 11. To enable direct Hard X-Ray (HXR) imaging spectroscopy, FOXSI makes use of grazing-incidence replicated focusing optics combined with fine-pitch solid-state detectors. FOXSI’s first flight provided the first HXR focused images of the Sun. For FOXSI’s second flight several updates were made to the instrument including updating the optics and detectors as well as adding a new Solar Aspect and Alignment System (SAAS). This paper provides an overview of these updates as well as a discussion of their measured performance.

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