See the published version of this article at Earth, Planets and Space.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Technical report
Chemical assessment of the explosive chamber in the projector system of Hayabusa2 for asteroid sampling
Yoshinori Takano
JAMSTEC
Corresponding Author
ORCiD: https://orcid.org/0000-0003-1151-144X
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published version at Earth, Planets and Space.
We report a chemical assessment of the explosive chamber in the projector system used during the sampling operation of the Hayabusa2 project at the surface of the C-type asteroid Ryugu. Although the explosion process was designed as a closed system (cf. Sawada et al., Space Sci. Rev., 2017), volatile combustion gases and semivolatile organics were produced together with quenched carbonaceous product. The chemical compositions of the gases, organics, and inorganics were investigated in the screening analysis. A solid-phase microextraction technique and thermal desorption coupled with gas chromatography/mass spectrometry analysis revealed that aliphatic (<C20 n-alkanes) and aromatic (<pyrene) hydrocarbons were produced in the closed chamber system. The aromatic ring compositions of the latter showed a semilogarithmic decrease: one ring > two rings > three rings > four rings, resulting in abiogenic molecular patterns. The most intense inorganic fingerprints were due to potassium (K+) and chloride (Cl–) ions derived from the initial KTB explosive and RK ignition charge. We discuss quality control and quality assurance issues applicable to future sample processes during the Hayabusa2 project.
Keywords
abiogenic organic molecules, aliphatic and aromatic hydrocarbons, explosion products, nominal and off-nominal assessment, energetic reaction with quenching effect
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
This is a list of supplementary files associated with this preprint. Click to download.
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
Version 2
Posted 16 Jun, 2020
Published
On 11 Jul, 2020
No community comments so far
Editor assigned
On 15 Jun, 2020
Submission checks complete
On 14 Jun, 2020
Editor invited
On 14 Jun, 2020
No comments provided
Editorial decision: Minor Revision
On 12 May, 2020
Review #2 received
Received 04 May, 2020
Review #1 received
Received 15 Apr, 2020
Reviewer #2 agreed
On 07 Apr, 2020
Reviewer #1 agreed
On 05 Apr, 2020
Reviewers invited
Invitations sent on 03 Apr, 2020
Editor assigned
On 01 Apr, 2020
Editor invited
On 31 Mar, 2020
Submission checks complete
On 27 Mar, 2020
First submitted
On 26 Mar, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Learn more about our company.
This preprint is under consideration at Earth, Planets and Space. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Technical report
Chemical assessment of the explosive chamber in the projector system of Hayabusa2 for asteroid sampling
Yoshinori Takano
JAMSTEC
Corresponding Author
ORCiD: https://orcid.org/0000-0003-1151-144X
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
Version 2
Posted 16 Jun, 2020
Published
On 11 Jul, 2020
No community comments so far
Editor assigned
On 15 Jun, 2020
Submission checks complete
On 14 Jun, 2020
Editor invited
On 14 Jun, 2020
No comments provided
Editorial decision: Minor Revision
On 12 May, 2020
Review #2 received
Received 04 May, 2020
Review #1 received
Received 15 Apr, 2020
Reviewer #2 agreed
On 07 Apr, 2020
Reviewer #1 agreed
On 05 Apr, 2020
Reviewers invited
Invitations sent on 03 Apr, 2020
Editor assigned
On 01 Apr, 2020
Editor invited
On 31 Mar, 2020
Submission checks complete
On 27 Mar, 2020
First submitted
On 26 Mar, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published version at Earth, Planets and Space.
We report a chemical assessment of the explosive chamber in the projector system used during the sampling operation of the Hayabusa2 project at the surface of the C-type asteroid Ryugu. Although the explosion process was designed as a closed system (cf. Sawada et al., Space Sci. Rev., 2017), volatile combustion gases and semivolatile organics were produced together with quenched carbonaceous product. The chemical compositions of the gases, organics, and inorganics were investigated in the screening analysis. A solid-phase microextraction technique and thermal desorption coupled with gas chromatography/mass spectrometry analysis revealed that aliphatic (<C20 n-alkanes) and aromatic (<pyrene) hydrocarbons were produced in the closed chamber system. The aromatic ring compositions of the latter showed a semilogarithmic decrease: one ring > two rings > three rings > four rings, resulting in abiogenic molecular patterns. The most intense inorganic fingerprints were due to potassium (K+) and chloride (Cl–) ions derived from the initial KTB explosive and RK ignition charge. We discuss quality control and quality assurance issues applicable to future sample processes during the Hayabusa2 project.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11