Grapple Fixture for a robot arm

1
Overview of MAXI
Miyata-sans talk, June 22, 2006 for the MAXI
mission
Radiator for X-ray CCDs
Grapple Fixture for a robot arm
Electronics
Optical Star Sensor
100cm
80cm
ATCS
Solid-state Slit Cameras (SSC) X-ray CCD
180cm
Gas Slit Cameras (GSC) X-ray gas proportional
counter
Total weight 490 kg
2
CCD structure for MAXI
CCD wafer is glued onto the ceramic of the
Peltier device
CCD wafer is directly attached to the Peltier so
that we can reduce the mass of the cold side. We
also coated the cold side with metal so that the
cold side is isolated from the radiation point of
view.
3
Screening process of the CCD for SSC (Kamiyama,
2004)
4
Dark image of HPK CCD
-60?
-40?
Grade A
Grade B
Kamiyama et al.
5
Screening for the MAXI SSC16x2 chips (Flight),
16 chips (Spare)
Good CCD chip (HPK)
Bad CCD chip (HPK)
Kamiyama et al.
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Screening results

• Scores for 64 chips supplied from HPK

Grade Sub-grade Pieces
A A 14
A 31
A- 5
B 6
C 8

• ? 2 FM
• 16 ? 1 SP
• Rest? backup

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Distribution of results
of chips
of bad columns
of hot pixels
Red and blue flight candidates Green spare
candidates
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We have prepared 2 FM cameras, 1 PM camera, 1 EM
camera