JUICE, ESA's L-class mission to the Jovian system |
JUICE, ESA's L-class mission to the Jovian system |
Feb 16 2012, 09:19 PM
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#31
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Member Group: Members Posts: 796 Joined: 27-February 08 From: Heart of Europe Member No.: 4057 |
Yellow book is available (13.1.2012) - JUICE.
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Jul 8 2023, 09:14 AM
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#32
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Member Group: Members Posts: 240 Joined: 28-October 12 Member No.: 6732 |
On 3 July the commissioning of the PEP instrument package was successfully completed, albeit the last sentence of the press release sounds somewhat suspicious.
QUOTE The scientific team behind PEP have checked that the basic systems work but during the journey towards the Jovian system they have to make further functional tests of the instruments’ high-voltage systems.
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Aug 9 2023, 01:52 AM
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#33
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Member Group: Members Posts: 611 Joined: 23-February 07 From: Occasionally in Columbia, MD Member No.: 1764 |
I don't know any specifics here, but outgassing can take a long time to die away completely (e.g. I think there was measurable thrust from ougassing on MSL for a couple of weeks after launch), and you dont want to power up high voltage systems if there is a residual atmosphere or arcing may occur. So this may just be unhurried prudence. I think some of the covers on Cassini's instruments were only opened/jettisoned several years after launch, after the inner solar system flybys were completed.
On 3 July the commissioning of the PEP instrument package was successfully completed, albeit the last sentence of the press release sounds somewhat suspicious. |
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Mar 21 2024, 07:28 AM
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#34
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Member Group: Members Posts: 240 Joined: 28-October 12 Member No.: 6732 |
I don't know any specifics here, but outgassing can take a long time to die away completely ... Exactly, nice article (in Swedish) on the physics of the out-gassing issues of high-voltage instruments in the example of JUICE's JDC instrument, first high-voltage testing in summer. EDIT: A brief account (in Japanese) of the initial post-launch check-out of the JNA instrument, during initial checkout the high-voltage output was limited to about 10 to 15% of the maximum level. After periodic checkouts, the high-voltage output will be gradually boosted to the level required for normal operation in the summer of 2026. |
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