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MAXI/Gas Slit Camera has two strip-shaped
How to scan the whole sky
fields of view, which are about 90 degrees away
from each other. The size of each field of view is
1 degree by 160 degrees. Each field of view
scans the whole sky as the International Space
Scan
direction
Station (ISS) goes round the Earth once every 90
minutes. In some high-background regions along
the ISS orbit, the X-ray cameras have to be turned
off. With this restriction , we are still able to
cover the whole sky thanks to two fields of view
looking at different directions.
MAXI/Solid-state Slit Camera has similar but smaller fields of view.
X-ray Calibration Facility for MAXI at NASDA/Tsukuba Space Center
From the other side where an X-ray
In 1998, we started to
generator is set.
construct a laboratory
to test and calibrate
MAXI X-ray cameras
and their electronics.
The 18-meter X-ray beam line
Now we have a 18viewed from the side where X-ray
meter X-ray beam line, cameras are set.
a couple of vacuum chambers, a cooling system for CCD cameras, and data
acquisition systems using workstations, NIM modules, and VME bus modules.
At the moment, NASDA postdocs and university students are conducting
experiments for X-ray CCDs and a radiation belt monitor. From a technical point
of view, MAXI will be a precursor to the future space missions in which many
CCD chips should be cooled and operated simultaneously.
Several issues: something new to the MAXI mission team
Our mission members have good experience in space missions, but only in
developing unmanned free-flyers for astronomy. In designing MAXI, we are
paying much attention to hazards, contamination, short-term variability in
thermal environment, a limited sky coverage free from the ISS structure.
The baffle for the star sensor
GSC Zenith Field of View
(Blue line)
GSC Forward Field of View
(Blue line)
Earth
We are exchanging information about
Red: Wiped by
hazzards such as knife edges with NASA rotating solar paddles
well in advance to the safety review.
Grey: The ISS structure
Contact person: Shiro Ueno at [email protected]
28 June 2000

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