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Earth, Planets and Space
Fig. 7 | Earth, Planets and Space

Fig. 7

From: A curation for uncontaminated Hayabusa2-returned samples in the extraterrestrial curation center of JAXA: from the beginning to present day

Fig. 7

Profiles of degrees of vacuum in CC3-1 and CC3-2 since 2019. During the rehearsal for introducing a sample container in CC3-1, the CC3-1 has been frequently purged to the atmospheric pressure from 2019 to the end of 2020. The atmospheric purge of CC3-1 in December 2020, when the Hayabusa2 sampler container was introduced into the chamber. Since then, both of the CCs have been maintained under vacuum level lower than 5 × 10–6 Pa, except for lower January 2022 (lower levels), when the planned electronic outage was conducted and all the valves of the chambers were closed under the vacuum conditions

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